Answer:
The oxygen-rich blood is then pumped out to your body through your arteries. It's bright red at this point. ... Your lips have a lot of these capillaries, which is why they're red. Your blood, now exhausted of its oxygen, is dark red as it now returns to your heart through your veins.
Explanation:
Answer:
The bright red blood leaving your heart is that color because it has more oxygen. The blood loses some oxygen and turns darker red before it returns to your heart.
Explanation:
Calculate the mass-to-mass ratio of 25.0 g of salt in 105 g of water. Work must be shown in order to earn credit.
Answer:
0.23
Explanation:
It is known that, the mass to mass ratio of the salt to water= (mass of salt / mass of water)
= (25.0 g / 105.0 g)
= 0.23
So, the answer is 0.23Which of the following is a proper buffer substituent pair?
a.
oxalic acid and lithium oxalate
c.
Neither a nor b
b.
carbonic acid and sodium carbonate
d.
Both a and b
Answer:
[tex]\boxed{\text{c. Neither a nor b is correct}}[/tex]
Explanation:
A buffer pair consists of either
A weak acid and its salt orA weak base and its salt(a) Oxalic acid and sodium oxalate
[tex]\rm H$_2$C$_2$O$_4$ + Li$_2$C$_2$O$_4$ \longrightarrow \, $2LiHC$_2$O$_4$[/tex]
Oxalic acid is an acid and lithium acid is a base. Together, they will neutralise each other and form the salt LiHC₂O₄.
A solution of LiHC₂O₄ is not a buffer.
The correct buffer pair is H₂C₂O₄ and LiHC₂O₄
(b) Carbonic acid and sodium carbonate
[tex]\rm H$_2$CO$_3$ + Na$_2$CO$_3$ $\longrightarrow \,$ 2NaHCO$_3$[/tex]
The carbonic acid and the sodium carbonate will neutralise each other and form the salt NaHCO₃.
A solution of NaHCO₃ is not a buffer.
The correct buffer pair is H₂CO₃ and NaHCO₃
[tex]\boxed{\textbf{Neither a nor b is correct}}[/tex]
If the atomic number of an atom is 30 and its atomic mass 65.38 then the of electrons in a neutral atom is
Answer:
30 electrons
Explanation:
Atoms are made of electrons, protons and neutrons.Protons and neutrons are in the nucleus and electrons are orbiting in energy shells around the nucleus. Atomic number is the number of protons and atomic number is characteristic for the element.
protons are positively charged and electrons are negatively charged. Neutral atoms are when the number of protons and electrons are equal.
Therefore this atoms atomic number is 30 where the number of protons is 30, and in the neutral atom since the number of protons is equal to the number of electrons, the number of electrons is 30
1.
A student looked up the naturally occurring isotopes of bromine and found the following information:
50.54% of the naturally occurring isotopes of bromine have an atomic mass of 78.92 amu while 49.46% of the
naturally occurring isotopes of bromine have an atomic mass of 80.92 amu. Calculate the average atomic mass of
bromine. SHOW ALL WORK
Answer:Tationia Rolon
Explanation:
Use this it might help:
Answer: The average atomic mass of bromine is 79.91 amu.
Explanation:
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
[tex]\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i[/tex] .....(1)
For isotope 1:
Mass of isotope 1 = 78.92 amu
Percentage abundance of isotope 1 = 50.54 %
Fractional abundance of isotope 1 = 0.5054
For isotope 2:
Mass of isotope 2 = 80.92 amu
Percentage abundance of isotope 2 = 49.46 %
Fractional abundance of isotope 2 = 0.4946
Putting values in equation 1, we get:
[tex]\text{Average atomic mass of Bromine}=[(78.92\times 0.5054)+(80.92\times 0.4946)][/tex]
[tex]\text{Average atomic mass of Bromine}=79.91amu[/tex]
Hence, the average atomic mass of element bromine is 79.91 amu.
An copper mass is heated and placed in a foam cup calorimeter containing 45.0 mL of water at 24.0 degrees celcius. The water reaches a temparture of 75 degrees celcius. How many joules of heat were released by the copper? The density of water is 1g/mL. The specific heat of water is 4.18 J/g degrees Celsius.....
Please show work
Answer:
= 9,593.1 Joules
Explanation:
Heat absorbed by water is equivalent to heat released by copper.
Heat absorbed is given by;
Q = mcΔT
where m is the mass, c is the specific capacity and ΔT is the change in temperature.
Therefore;
Since dnsity of water is 1 g/mL, and specific heat capacity is 4.18 J/g°C while the change in temperature is (75-24) = 51°C.
Heat absorbed by water = 45 g × 4.18 J/g°C × 51
= 9,593.1 Joules
Therefore, the heat released by copper is 9,593.1 Joules
what volume will 1.12 moles of nitrogen gas occupy at STP
Answer:
Explanation:
Volume occupied by Nitrogen gas at STP = number of moles x 22.4dm³/mol
Number of moles = 1.12moles
Volume = 1.12 x 22.4
Volume at STP = 25.1dm³
A tank of gas has partial pressures of nitrogen and oxygen equal to 1.61 × 10^4 kPa and 4.34 × 10^3 kPa, respectively. What is the total pressure of the tank
Answer:
answer is 2.04*10^4 kPa
Explanation:
Dalton's Law of Partial Pressures.
it is because that when the volume and the temperature of a gaseous mixture are kept constant, the total pressure of the mixture is equal to the sum of the partial pressures of its gaseous components .
Final answer:
Using Dalton's Law of Partial Pressures, the total pressure of a tank containing nitrogen and oxygen gases, given their partial pressures, is calculated as 2.04 × 10⁴ kPa.
Explanation:
The question asks for the total pressure of a tank containing a mixture of nitrogen and oxygen gases, given the partial pressures of both gases. According to Dalton's Law of Partial Pressures, the total pressure of a gas mixture is equal to the sum of the partial pressures of each gas in the mixture. This can be represented by the formula Ptotal = PN2 + PO2, where PN2 is the partial pressure of nitrogen, and PO2 is the partial pressure of oxygen.
In this case, the partial pressure of nitrogen (PN2) is given as 1.61 × 104 kPa, and the partial pressure of oxygen (PO2) is 4.34 × 103 kPa. Therefore, the total pressure (Ptotal) can be calculated as:
Ptotal = 1.61 × 104 kPa + 4.34 × 103 kPa
= 2.04 × 104 kPa
Thus, the total pressure of the tank is 2.04 × 104 kPa.
Which best describes the trends in electronegativity on the periodic table?
Answer:
On the periodic table, electronegativity generally
1. decreases as you move down a group and
2. increases as you move from left to right across a period.
Therefore, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.
Electronegativity on the periodic table increases from left to right across a period and decreases from top to bottom within a group, with fluorine being the most electronegative element.
The trend in electronegativity on the periodic table describes how the ability of an atom to attract bonding electrons changes across the table. Generally, electronegativity decreases from top to bottom within a column as a result of increasing atomic size, which makes the nucleus less effective at pulling in bonding electrons. Conversely, electronegativity increases from left to right across a row due to a decrease in atomic size, making the nucleus more effective in attracting bonding electrons. Elements in the halogen group have some of the highest electronegativities because they need only one more valence electron to complete their outer shell, unlike group 1 elements which are more willing to give up their valence electron. Fluorine is the most electronegative element, and cesium is the least electronegative nonradioactive element, excluding the noble gases and hydrogen which have special cases in terms of electronegativity.
CAN SOMEONE PLEASE WRITE ME SHORT STORY FOR THIS. I'LL GIVE YOU BRAINLIEST. I PROMISE. 98 POINTS
Phases of Matter Activity
Now it is your turn to show what you know about phases of matter and thermal energy transfer! Your task is to create a presentation to explain the transformation of a substance as it changes phases. You may choose to write a story or create a comic strip. For your story or comic, you will create a main character and detail the adventure as your character is exposed to thermal energy, causing it to undergo phase changes from a solid, to a liquid, to a gas. You may create your own comic strip using drawings, presentation software, or this comic strip template.
Your presentation must include the following:
title and introduction of your character, including what substance the character is made of
source of thermal energy your character encountered (conduction, convection, and/or radiation)
detailed description and/or diagram of the particle transformation from solid to liquid phase
detailed description and/or diagram of the particle transformation from liquid to gas phase
Answer & Explanation:
Kindly find the attached presentation.
Answer: Start off by figuring out a solid like a ice cube or such then start writing how it changes and what it goes through so say when you apply thermal energy/ heat then it becomes water which is it's liquid state and then continue.
Explanation:
Fluorine exerts a pressure of 1.2 atm on a piston. When the pressure is changed to 1.1 atm, its volume is 556.1 mL. What was the original volume in mL? Solve the the nearest two decimal places.
Answer:
509.7583 mL ≅ 509.76 mL.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have different values of P and V:
(P₁V₁) = (P₂V₂)
P₁ = 1.2 atm, V₁ = ??? mL.
P₂= 1.1 atm, V₂ = 556.1 mL.
∴ V₁ = (P₂V₂)/(P₁) = (1.1 atm)(556.1 mL)/(1.2 atm) = 509.7583 mL ≅ 509.76 mL.
What technological development led to the discovery of the existence of subatomic particles?
Answer:
Thomson had discovered the first subatomic particle, the electron. Six years later Ernest Rutherford and Frederick Soddy, working at McGill University in Montreal, found that radioactivity occurs when atoms of one type transmute into those of another kind
Explanation:
Examine the images.
Which option is a phase change that occurs between liquids and gases?
Select all that apply.
Answer:
4 th image
Explanation:
water is being boiled n the 4th image indicating that the change between liquids and gasses is water vapor.
Answer:
The soda bottles and the boiling water
Explanation:
just trust
Based on the size and shape of the clasts in the sedimentary rock shown in the image, which classification would geologists most likely apply to the rock?
A. Conglomerate B. Sandstone C. Mudrock D. Breccia
Answer:
D. Brecci
The pattern of the rock below resembles the distinct pattern of brecci.
The pattern of conglomerate usually appears to be more round peices in the rock. The pattern of brecci has a more shard like appearance.
Hope this helps,
One of the virtuosos on Brainly
Answer:
The correct answer is option D, that is, breccia.
Explanation:
The clastic sedimentary rocks, which are formed of large angular pieces are termed as breccia. The gaps in between the large angular pieces are occupied with a matrix of smaller constituents and a mineral cement, which holds the rock together. The formation of breccia takes place when the angular and dissociated pieces of minerals or rock debris gather.
In Africa, as the crocodile lies with its mouth open, the plover, or crocodile bird, flies into its mouth and feeds on bits of meat stuck in the crocodile’s teeth. The crocodile does not harm the plover. The plover gets a meal and the crocodile gets his teeth cleaned. Describe the dynamics of this relationship.
A) It is a mutualistic relationship because both animals benefit; neither animal is harmed.
B) It is a symbiotic relationship because the plover benefits from the meat in the crocodile's teeth..
C) The crocodile is a predator. The plover is a parasite. There are two relationships illustrated by this dynamic.
D) It is an example of commensalism because the plover benefits from the relationship while the crocodile is neither helped or harmed.
NO!
Crocodiles do not eat Plovers. They only prey on larger birds like the Maribou Stork, or birds that are not quick enough to realize that they are being stalked.
So yes, A.
It is a mutualistic relationship because both animals benefit; neither animal is harmed. Therefore, the correct option is option A.
What is animal?Any of a group of multicellular eukaryotic creatures (Kingdom Animalia). It is assumed that they developed separately from unicellular eukaryotes. Animals vary fundamentally from participants in two major kingdoms of eukaryotic organisms, plants (Plantae) and fungus (Mycota), in form and physiology.
In Africa, as the crocodile lies with its mouth open, the plover, or crocodile bird, flies into its mouth and feeds on bits of meat stuck in the crocodile’s teeth. The crocodile does not harm the plover. The plover gets a meal and the crocodile gets his teeth cleaned. It is a mutualistic relationship because both animals benefit; neither animal is harmed.
Therefore, the correct option is option A.
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How Do You Round In Molar Mass
For molar mass try to use as many decimal places as possible to be the most accurate. The number of sig figs in your final answer will still be the same as the initial amount of sig figs in the mass given (or whatever value given that has the least amount of sig figs)
Answer:
decimals
Explanation:
What is the atmospheric pressure when a liquid is boiling at its normal boiling point
Answer:
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere 760 degrees
Explanation:
The atmospheric pressure when a liquid is boiling at its normal boiling point equals 1 atmosphere (atm) or 101.3 kilopascals (kPa). This is the point where the vapor pressure of the liquid matches the external atmospheric pressure.
Explanation:The atmospheric pressure when a liquid is boiling at its normal boiling point is known as 1 atmosphere (atm) or 101.3 kilopascals (kPa). The concept here revolves around the boiling point of a liquid, which is the temperature at which its equilibrium vapor pressure equals the external pressure exerted on the liquid by its gaseous surroundings. This is usually the Earth's atmospheric pressure in open containers.
Hence, when a liquid reaches its normal boiling point, the external atmospheric pressure equals 1 atm or 101.3 kPa. This means that at a liquid's normal boiling point, the vapor it produces has just enough energy to break free from the surface of the liquid without the help of further heating. For instance, the normal boiling point of water is 100 degrees Celsius, and this occurs at 1 atm of pressure.
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what is the mass in grams of 0.257 mol of sucrose (C12H22O11)?
Answer:
87.894 grams.
Explanation:
So we know that the mass of the carbon is 12g, the Mass of the Hydrogen is 1g and the Mass of the Oxygen is 16g. Given, Chemical Formula of the Sucrose C₁₂H₂₂o₁₁ we can calculate the molar mass by performing the following operation:
Molar Mass = 12 × 12 + 1 × 22 + 16 × 11 = 144 + 22 + 176 = 342 g/mole
So if we need to know the mass in grams of 0.257 mol, then we have to:
342 g/mole * 0.257 mol = 87.894 grams.
The mass in grams is: 87.894 g
Which molecule is polar?
A.) CCl4
B.) CO2
C.) SO3
D.) None of these.
Answer:
A. CCI4
Explanation:
After analyzing the molecular geometry and bond polarities of CCl4, CO2, and SO3, we can conclude that none of these molecules are polar due to the symmetrical arrangement that leads to the cancellation of bond dipoles. The correct answer is D.) None of these.
The question asks to identify which of the listed molecules is polar. To determine if a molecule is polar, we need to assess both the electronegativity differences between bonded atoms and the geometry of the molecule. Molecular polarity arises from an uneven distribution of electron density, leading to a separation of charge.
CCl4 is a molecule with four chlorine atoms symmetrically arranged around a central carbon atom in a tetrahedral structure. The C-Cl bond is polar due to the difference in electronegativity between carbon and chlorine. However, the spatial orientation of the bonds in CCl4 is such that the individual bond polarities cancel out, resulting in a nonpolar molecule.CO2, or carbon dioxide, is a linear molecule with two oxygen atoms bound to a central carbon atom. Although the C=O bond is polar, the linear geometry of CO2 causes the dipoles to cancel each other out, so the molecule itself is nonpolar.SO3, or sulfur trioxide, is a trigonal planar molecule with evenly spaced double bonds between sulfur and oxygen. Like CO2, the individual S=O bonds are polar, but the trigonal planar geometry allows the bond dipoles to cancel, resulting in a nonpolar molecule.Given the symmetrical geometry and cancellation of bond dipoles in CCl4, CO2, and SO3, none of these molecules are polar. Therefore, the correct answer to the question is D.) None of these.
Which statements best describe the first stage of cellular respiration
Cellular respiration is the process of taking in glucose (sugar) and converting it into usable energy (ATP) so therefore the first stage would be taking the glucose into your bloodstream.
Answer:
The stage ha opens I in cytoplasm, glucose is broken down, and energy is released
Explanation:
I think
HELP
Question 1 (1 point)
Saved
In the first reaction with Epsom Salt added to ammonia, what evidence was there for a chemical reaction taking place?
Question 1 options:
color change
formation of a precipitate
increase in temperature
formation of bubbles
Question 2 (1 point)
In the second reaction with iron and oxygen, what evidence for a chemical reaction was NOT observed?
Question 2 options:
new substance formed
formation of a precipitate
color change
change in temperature
Question 3 (1 point)
In the third reaction which gas is released when baking soda is added to vinegar?
Question 3 options:
carbon dioxide
hydrogen gas
water
oxygen
Question 4 (1 point)
In the fourth reaction with copper sulfate and sodium hydroxide, what is the precipitate that is formed?
Question 4 options:
Cu(OH)2
NaOH
CuSO4
Na2SO4
1.formation of bubbles
2.change in tempeture
3.hydrogen gas
4.NaOH
what would the volume of gas be at 150 c if it had a volume of 693 ml at 45 c
Answer:
[tex]\boxed{\text{922 mL}}[/tex]
Explanation:
The pressure is constant, so we can use Charles' Law to calculate the volume.
[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
Data:
V₁ = 693 mL; T₁ = 45 °C
V₂ = ?; T₂ = 150 °C
Calculations:
(a) Convert temperature to kelvins
T₁ = ( 45 + 273.15) = 318.15 K
T₂ = (150 + 273.15) = 423.15 K
(b) Calculate the volume
[tex]\dfrac{ 693}{318.15} = \dfrac{ V_{2}}{423.15}\\\\2.178 = \dfrac{ V_{2}}{423.15}\\\\V_{2} = 2.178 \times 423.15 = \boxed{\textbf{922 mL}}[/tex]
Using Charles's Law, convert the given temperatures to Kelvin, then solve for final volume V2 using the formula V2 = (V1 × T2) / T1. Perform the calculations to determine the volume of gas at 150°C.
Explanation:To calculate the volume of gas at 150°C when it had a volume of 693 mL at 45°C, we can use Charles's Law which relates volumes and temperatures of an ideal gas, maintaining pressure and the amount of gas constant.
Mathematically, the law is expressed as: V1/T1 = V2/T2. First, we need to convert the temperatures from Celsius to Kelvin by adding 273.15. So, T1 = 45°C + 273.15 = 318.15 K and T2 = 150°C + 273.15 = 423.15 K. We have the initial volume V1 = 693 mL and want to find V2.
Using Charles's Law, we rearrange the formula to solve for V2: V2 = (V1 × T2) / T1. Plugging in the values, we get V2 = (693 mL × 423.15 K) / 318.15 K. Execute the multiplication and division to get the final volume V2.
PLEASE HELP!!! Solid calcium combines with oxygen gas to form solid calcium oxide. Write a balanced equation and how many moles of calcium oxide would be produce if only 0.33 moles of oxygen were available?
Answer:
2Ca + O2 -> 2CaO
0.66 mol CaO
Explanation:
0.33 mol O2(2 mol CaO/1 mol O2) = 0.66 mol CaO
0.33 moles of oxygen would produce 0.33 moles of calcium oxide according to the balanced chemical equation for the reaction of solid calcium with oxygen gas. Additionally, calcium oxide is a very reactive substance with historical uses in lighting.
Explanation:The reaction of solid calcium (Ca) with oxygen gas (O2) to form solid calcium oxide (CaO) can be represented by the balanced chemical equation: 2Ca + O2 → 2CaO. This equation indicates that 1 mole of oxygen reacts with 2 moles of calcium to produce 2 moles of calcium oxide. If you have 0.33 moles of oxygen available, then using stoichiometric principles, you would also produce 0.33 moles of calcium oxide as the mole ratio of oxygen to calcium oxide is 1:1.
Calcium oxide, also known as quicklime or lime, is very reactive and emits an intense white light when heated to a high temperature. It's interesting to note that blocks of calcium oxide heated by gas flames were used as stage lights in theaters before electricity was available.
Furthermore, calcium hydroxide (Ca(OH)2) can be formed from the reaction of solid calcium oxide with liquid water. However, this step is not necessary to calculate the amount of calcium oxide produced in the original reaction.
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A scientist is sitting in her living room and hears the wind rushing past her front door.
Based on her knowledge of Bernoulli's principle, what does the scientist know even without opening the door?
The air outside has less volume than the air inside.
There is less air pressure outside the door than inside the door.
The air outside has more mass than the air inside.
There is more air pressure outside the door than inside the door.
Answer:
Explanation:
Okay I just took this test and I will just tell you now
D is not the answer.
Sorry I couldn't be more help
Answer:
B
Explanation:
There is less air pressure outside the door than inside the door.
Consider the following reversible reaction
Answer:
The right choice is K(eq) = ([CO₂]) / [O₂]
Explanation:
The equilibrium constant of a chemical reaction is the value of its reaction quotient at chemical equilibrium
For a system undergoing a reversible reaction described by the general chemical equation
a A + b B → x X + n NAn equilibrium constant can be expressed as following
K(eq) = ([X]ˣ*[N]ⁿ) / ([A]ᵃ*[B]ᵇ)
where [] is the equilibrium concentration of each component.
and the concentration of solid is conventionally considered as 1
in your example:
The reversible reaction
C ₍s₎ + O₂ ₍g₎ ↔ CO₂ ₍g₎taking in consideration that C is a solid and the concentration of solid is conventionally considered as 1
So, the equilibrium constant for this reversible reaction can be expressed as following
K(eq) = ([CO₂]) / [O₂]∴ The right choice is K(eq) = ([CO₂]) / [O₂]
Final answer:
A reversible reaction involves reactants and products that can interconvert, and equilibrium is the state when their rates of formation are equal. The reaction quotient (Q) is used to assess the reaction's status.
Explanation:
A reversible reaction is a chemical process where the reactants form products, which can in turn react together to form the original reactants. This kind of reaction is denoted by a double-headed arrow. When a reversible reaction reaches a state where the rate of the forward reaction equals the rate of the reverse reaction, it is said to be at equilibrium. To evaluate the status of a reversible reaction, the reaction quotient (Q) is used, which compares the concentrations of the products and reactants at any given point in the reaction.
Reversible reactions are significant in many areas, including biochemical processes in the human body. Although some reactions may appear to proceed in one direction due to energetics or other factors, under the right conditions, reversibility is possible. The concept of equilibrium and the conditions affecting reversible reactions are fundamental to understanding chemical systems.
Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas.What mass of hydrochloric acid reacts when 87.7 grams of aluminum dissolves in excess hydrochloric acid
Answer:
355.5 g.
Explanation:
The balanced equation for the mentioned reaction is:2Al + 6HCl → 2AlCl₃ + 3H₂,
It is clear that 2.0 moles of Al react with 6.0 mole of HCl to produce 2.0 moles of AlCl₃ and 3.0 mole of H₂.
Firstly, we need to calculate the no. of moles of (87.7 g) of Al:no. of moles of Al = mass/atomic mass = (87.7 g)/(26.98 g/mol) = 3.251 mol.
Using cross multiplication:
2.0 mol of Al need to react → 6.0 mol of HCl, from stichiometry.
3.251 mol of Al need to react → ??? mol of HCl.
∴ the no. of moles of HCl needed to react with (87.7 g) 3.251 mol of Al = (3.251 mol)(6.0 mol)/(2.0 mol) = 9.752 mol.
Now, we can get the mass of HCl needed to react with (87.7 g) 3.251 mol of Al:mass of HCl = (no. of moles)(molar mass) = (9.752 mol)(36.46 g/mol) = 355.5 g.
HELP PlEASE
What are long chains of carbon molecules called?
Question 1 options:
atoms
polymers
monomers
bonds
Question 2
Which of the following is not an organic compound?
Question 2 options:
protein
methane
corn oil
aluminum
Question 3 (5 point)
What are fossil fuels made from?
Question 3 options:
inorganic compounds
corn oil
hydrocarbons
polyethylene
Question 4 (7 point)
Repeating units in an organic compound are called __________.
Question 4 options:
hydrocarbons
amino acids
polymers
monomers
Question 5 (3 point)
What are the properties of organic compounds determined by?
Question 5 options:
their boiling point
their ability to react with acids
their functional group
the total number of hydrogen atoms
Question 6 (1 point)
What are shopping bags and plastic bottles made of?
Question 6 options:
alkyl groups
halogens
polyethylenes
hydrocarbons
Question 7 (4 point)
One functional group of organic molecules is an alkene. Which of the following is NOT a property of an Alkene?
Question 7 options:
double bond between two carbon atoms
stronger bonds
release more energy when burned
contain a chlorine atom
Answer:
1 Polymer
2 Aluminum
3 Hydrocarbons
4 monomers
5 their functional group
6 polyethylene
Explanation:
i took the test
Polymer are the long chains of carbon molecules .
Aluminum among the following is not an organic compound.
Fossil fuels are made from hydrocarbons.
Repeating units in an organic compound are called monomers
The properties of organic compounds determined by their functional group .
Shopping bags and plastic bottles are made up of polyethylene .
Contain chlorine atom is not a property of alkene.
What do you mean by the following terms ?PolymerAluminumHydrocarbonsMonomersFunctional groupPolyethyleneChlorine atom
Polymer-A polymer is a substance or material consisting of very large molecules, called macromolecules .
Aluminum-Aluminum is a chemical element with the symbol Al and atomic number 13.
Hydrocarbons-Theses are the class of organic chemical compounds composed only of the elements carbon (C) and hydrogen (H).
Monomers-A monomer is a molecule that forms the basic unit for polymers, which are the building blocks of proteins.
Functional group-An atom or group of atoms that replaces hydrogen in an organic compound.
Polyethylene-Polyethylene is a polymer made of repeating ethylene units.
Chlorine atom-Chlorine is a chemical element with the symbol Cl and atomic number 17 .
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Which structure represents nonane?
Answer:
D
Explanation:
Answer: option D
Explanation:
Since nonane is a saturated hydrocarbon called an Alkane.
Since it has 9 carbons in its carbon chain hence used Nona as root word
And -ane as suffix since functional group is alkane, single bond.
Hence , Nona+ and= nonane
So D is correct answer
A cake is made by mixing ingredients and placing the material in an oven for baking. What type of reaction is involved?
SELECT AN ANSWER
Exothermic
Caloric
Joule
Endothermic
It is endothermic the cake is taking in heat and baking in order to rise
Which law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pressure conditions?
Boyle’s law
Charles’s law
Dalton’s law
Gay-Lussac’s law
The answer is: Charle's Law.
Why?The law that states that the volume and absolute temperature of a fixed quantity of gas (ideal gas) are proportional under constant pressure is the Charle's Law, also known as the law of volumes.
The law describes how a gas kept under constant pressure tends to expand when the temperature increases and it's described by the following equation:
[tex]\frac{V}{T}=k[/tex]
Where,
[tex]V=Volume\\T=Temperature\\k=constant[/tex]
Also, to describe the relationship between two differents volumes at different temperatures, we have:
[tex]\frac{V_{i}}{T_{i}}=\frac{V_{f}}{T_{f}}[/tex]
Where,
[tex]V_{i}=InitialVolume\\T_{i}=InitialTemperature\\V_{f}=FinalVolume\\T_{f}=FinalTemperature[/tex]
Have a nice day!
Answer:
The answer is C.) Charle's law
Explanation:
100% on edge
A patient has an order for a drip at 7mg of medicine per hr the iv drip is provided from the pharmacy as 1000mg in 500ml of dextrose 5% in water. Calculate the flow rate of the pump in ml per hour.
Answer:
3.5 mL/hr.
Explanation:
As mentioned the patient needs to take 7 mg of medicine per hr.Also, as given the sample contains 1000 mg in 500 ml of dextrose 5% in water which means it contains (2 mg/mL).Every 1.0 mL contains 2 mg of the medicine.It needs 7 mg per hr.So, the rate of the pump in ml per hour will be = (7 mg)/(2 mg/mL)(1 hr) = 3.5 mL/hr.
Final answer:
To provide a patient with 7 mg of medication per hour from a solution of 1000 mg in 500 ml, the flow rate of the pump needs to be set at 3.5 ml per hour.
Explanation:
To calculate the flow rate of the pump in ml per hour for a medication order of 7 mg per hour, when the IV solution provided is 1000 mg in 500 ml, we use the proportion method. This involves setting up a proportion between the strength of the solution and the required dose to find the volume of solution that corresponds to the required dose.
First, we determine how many milligrams are in each milliliter of the solution: 1000 mg in 500 ml means there are 2 mg in each ml (1000 mg / 500 ml = 2 mg/ml). Then, knowing the patient needs 7 mg per hour, to find out how many milliliters that is, we divide the needed dose by the concentration: 7 mg / (2 mg/ml) = 3.5 ml per hour.
This calculation shows that to administer 7 mg of medicine per hour, the flow rate must be set to 3.5 ml per hour.