Answer:
Because it describes the chemica
reactions that underlie all body.
Explanation:
Like movement, digestion, the pumping of your heart and even thoughts.
A basic knowledge of chemistry is crucial to understanding human physiology because processes like digestion, respiration, and all bodily functions involve chemical reactions. Concepts of chemistry like atomic structure, elements, molecules and bonds are fundamental in understanding how different nutrients and toxins impact our health and bodily functions. Thus, chemistry is instrumental in understanding human physiology.
Explanation:Basic chemistry is pivotal in understanding human physiology because it forms the framework for examining the workings of the physical body. For example, chemical reactions occur when we digest food, breathe, or perform any bodily function. These reactions are dependent on the principles of chemistry. Understanding concepts such as atomic structures, elements, molecules, and bonds are fundamentals of chemistry that help us grasp how differing nutrients and toxins affect the body's performance and health. Additionally, the physiology of cell and its function, nerve transmission, muscle contraction, and homeostasis, they all have biochemical basis. Therefore, studying basic chemistry is an essential stepping stone to grasp the understanding of human physiology.
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Based on the electron configuration of the two
atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Lithium 1s22s1
Nitrogen 1s^22s^22p^3
Help
A. 1:1
B. 1:2
C. 2:1
D. 3:1
Answer: option D. 3:1
Explanation:
the answer to this question is C 2:1
What is not a factor in soil type?
A. Mineral Content
B. Pollution
C. Climate
D. Microorganism Content
Answer:
its b
Explanation:
Which of these foods is produced using bacteria?
A.mashed potatoes
B.fresh apples
C.cheddar cheese
D.fried chicken
Answer:
C
Explanation:
Cheese is rotten milk
Answer:
The answer is C, Cheddar Cheese
what is the volume of 0.2 moles of neon gas at STP?
Standard Molar Volume is the volume occupied by one mole of any gas at STP. Remember that "STP" is Standard Temperature and Pressure. Standard temperature is 0 &176:C or 273 K. Standard pressure is 1 atmosphere or 760 mm Hg (also called "torr"). 1 mole of any gas at STP occupies 22.4 liters of volume.
Answer: 4.5 L
Explanation: Ideal gas at STP standard temperature and pressure: at STP
P = 1 atm
T = 1 °C convert to K (273 K)
Solution:
PV= nRT
Derive the equation to find V
V= nRT / P
Substitute the values
V= 0.2 moles x 0.082 L.atm/ mol. K x 273 K / 1 atm
Cancel out the units of moles, atm and K so the remaining uni is in L.
Experimental evidence suggests that the H—C—H bond angles in ethene, C2H4, are ____.
A. 90°
B. 109.5°
C. 120°
D. 180°
Answer: option C. 120°
Explanation:
TIME REMAINING
19:20
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the pressure
of the gas?
It decreases by a factor of four.
It increases by a factor of four.
It decreases by a factor of eight.
It increases by a factor of eight.
Save and Exit
NE
Submit
Mark this and return
Answer:
The pressure of the gas will "increases by a factor of four."
Explanation:
The absolute zero in other words called as the absolute temperature. Whereas the absolute zero is the least possible temperature. In which nothing will remain cold and no heat can be released or present in the substance. When it is described in the figure it will be, –273.15 degrees Celsius on the Celsius scale. and 0 K on the Kelvin scale. This absolute temperature concept has been raised from the third law of the thermodynamics.
What does it mean if a solid is malleable?
A. It is stretchable.
B. It is conductive.
C. It is bendable.
D. It is hard.
Answer:
Option C
Explanation:
The answer to this question will be the third option "It is bendable." Malleable means to be able to change the shape of a object without damaging or breaking it. In this case a malleable solid would be for example drainage pipes. These pipes have curves and different shapes but still remain its product of a metal.
Hope this helps!
Final answer:
A malleable solid can be shaped under compression into thin sheets without breaking, a property typically found in metals, which also possess ductility, the ability to be drawn into wires.
Explanation:
If a solid is malleable, it means that it can be pounded into thin sheets or bent into shape without breaking. This property is commonly associated with metals, which are elements known for their ability to conduct electricity and heat, their shiny appearance, and their variable hardness and melting temperatures. At room temperature, metals are typically solid, with the well-known exception of mercury.
The ductility of a metal refers to its ability to be drawn into thin wires, and malleability refers to being shaped under compression, such as hammering or rolling into sheets. For instance, metals like copper are used in electrical wiring because they are both malleable and ductile; they don't break when being bent into the needed shapes and can be stretched into thin wires that conduct electricity efficiently.
chlorine molecule is orbital and dot structure
Answer:
The electron dot structure of [tex]Cl_2[/tex]
Explanation:
Step 1: First we have to know the number of valence electrons present in a molecule.
Chlorine is an element from group 17 with 7 nos. of valence electrons.
So, the given [tex]Cl_2[/tex] will have 7+7 = 14
Step 2: We, will begin by drawing the skeleton of the molecule.
Step 3: Then, we have to place the bonding pairs of the electrons in the middle atoms so that chemical bonds can be formed.
Step 4: The electrons left will be used as lone pairs for central and terminal atoms in order to achieve an octet and to finish the electron dot structure. The structural formula and electron dot structure has been attached below.
Does sulfured food taste different?
Answer:
Yes
Explanation:
Sulfur in its pure do not have any taste and odor but many foods rich in sulfur can have a distinct odor and taste. The foods contains sulfur in very small amounts but some of the foods which are known for rich in sulfur are onion, garlic, egg, flex seeds, walnuts, meat, red bell pepper, cheese, green vegetables etc.
The foods rich in sulfur helps in fighting skin acne and fights skin infection which makes our skin brighter because of this property of sulfur it is used in skin antiseptic creme and medicines.
The intake of the excess sulfur can cause burning sensation, diarrhea, tonsils and even can cause brain damage if taken in too excess and death of the brain cells. So, the sulfur is good for health and is a remedy for our skin if taken by the natural source of food in a healthy amount.
Answer:
He is right, sulfured food dose taste different
Write a complete electron configuration for borin
The electron configuration for Boron (B) is given as [tex]1s^2 2s^2 2p^1[/tex] or [tex][He] 2s^2 2p^1[/tex]
Answer:
Boron (B) has an atomic number equal to 5 and is an element from Group 13 of the periodic table. It has a total of 5 electrons of which 3 are valence electrons.
The electron configuration for Boron can be written with the first two electrons in the 1s orbital. Since 1s orbital can hold only two electrons, out of the remaining three electrons; two electrons will go in the 2s orbital. The remaining one electron in the 2p orbital. Therefore the Boron electron configuration will be [tex]1s^2 2s^2 2p^1[/tex]
Since [tex]1s^2[/tex] is the electron configuration for Helium, Electron configuration for Boron can also be written as [tex][He] 2s^2 2p^1[/tex]
(Refer attached figure)
How much neutrons, protons and electrons does Al3+ have?
Answer: Protons = 13
Electrons= 10
Neutrons = 14
Explanation: This problem is an ion of Al which has a charge of +3
For this ion the atomic number for Al is 13 and its mass number is 27.
The atomic number indicates the number of protons which is 13. The number of electrons is changed due to loss of electrons since it was ionized. It loses 3 electrons so the total number of electrons is 13-3 = 10.
The number of neutrons can be calculated using
Atomic mass - atomic number
27- 13 = 14 neutrons
Aluminum ion (Al³⁺) has thirteen protons, thirteen protons, and ten electrons.
How is the Aluminum ion (Al³⁺) formed?Aluminum ion (Al³⁺) is formed by the loss of three electrons from the neutral aluminum atom.
The neutral aluminum atom has thirteen protons, thirteen electrons, and thirteen protons.
During the formation of the Aluminum ion (Al³⁺), three electrons are removed from the valence shell of the neutral aluminum atom, leaving it with only ten electrons.
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What is the mass of 2.35 x 10^21 moles of sodium
Answer:
5.41 x 10²² g
Explanation:
Data Given:
no. of moles of sodium = 2.35 x 10²¹ moles
mass of sodium = ?
Solution:
Formula used
no. of moles = mass in grams / molar mass
To find mass rearrange the above equation:
mass in grams = no. of moles x molar mass. . . . . . (1)
molar mass of Sodium (Na) = 23 g/molPut values in equation 1
mass in grams = 2.35 x 10²¹ moles x 23 g/mol
mass in grams = 5.41 x 10²² g
So,
mass of Sodium (Na) = 5.41 x 10²² g
How much potential energy does a 15kg branch have if it 4.5 m above the ground?
Answer:
675 joule
Explanation:
mass of the branch=15 kg
gravity=9. 8 m/s^2
height=4. 5 m
now,
potential energy=mass×gravity×height
=15kg ×9. 8 m/s^2 ×4. 5 m
=675 j
Answer: PE = 662 J
Explanation: Potential Energy is the product of mass, gravity and height.
PE = mgh
= 15 kg x 9.8 m/s² x 4.5 m
= 662 J
The —————of the comet is on the opposite side of the common from the sun
A-Trail
B-light
C-tail
The tail of a comet is on the opposite side of the comet from the sun, due to the influence of the sun's radiation pressure and solar wind.
Explanation:The tail of the comet is on the opposite side of the comet from the sun. This happens because the sun's radiation pressure and solar wind push material away from the comet's nucleus, forming a tail that points away from the sun, regardless of the direction the comet is moving. Therefore, the tail of the comet always lies opposite to the direction of the sun.
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Which biome receives too little water to support the growth of trees?
o
deciduous forest
grassland
O
taiga
O
rain forest
Answer:
:Grassland
Explanation:
Explanation: Grasslands have too little water to support trees as it does not rain very often in more temperate Grasslands
Grasslands are the biome that receives insufficient water for tree growth, making them dominated by grasses instead of trees. Boreal forests, or taigas, are inaccurately described by the statement claiming they are dominated by deciduous trees, as they are in fact dominated by coniferous trees.
Explanation:Which Biome Receives Too Little Water to Support the Growth of Trees?The grassland biome is characterized by receiving too little water to support the growth of large trees. In a grassland, the dominant vegetation consists of grasses which are adapted to environments with less precipitation. Unlike deciduous forests, which have moderate rainfall and temperatures to support tree growth, and taigas (boreal forests) and rainforests, which have significant precipitation that fosters dense tree growth, grasslands are more suited for grasses and herbaceous plants.
It's noteworthy that one of the statements about biomes might be false. Specifically, statement c. Boreal forests are dominated by deciduous trees is incorrect because boreal forests, also known as taiga, are actually dominated by coniferous trees, not deciduous trees.
These models show the electron structures of two different nonmetal elements. Element 1 at left has a purple circle at center with 2 concentric black lines around it. The first line has 2 small green balls on it. The second line has 8 small green balls on it. Element 2 at right has a purple center with 5 concentric circles around it, with the first circle innermost. The first circle has 2 small green balls on it, and the second circle has 8 small green balls on it. The third circle has 18 small green balls on it, and the fourth circle has 18 small green balls on it. The fifth circle has 6 small green balls on it. Which element is likely more reactive, and why? Element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. Element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. Element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. Element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.
Element 2 is more reactive than element 1 because element 2 does not have a fully filled valence shell, so it will attract electrons to complete it. Therefore, option (D) is correct.
What are valence electrons?Valence electrons are those electrons present in the outermost shell of an atom while the electrons occupied the inner shell are known as core electrons. Lewis structures can be useful to evaluate number of valence electrons and predict the nature of bonds.
Valence electrons are arranged in different types of shells and these electrons will decide the interaction between atoms and the formation of chemical bonds.
Only valence electrons present in the outermost shell can take part in the formation of a chemical bond or a molecule and are reason of the reactivity of the element such kind of electrons is called valence electrons.
Given, element 1 have electronic configuration of 2,8 while the electronic configuration of element 2 is given 2, 8, 18, 18, 6. Element 1 contains fully filled valence shell while element 2 has an incomplete valence shell of electrons. Therefore, element 2 will be more reactive to get nearednoblegas configuration.
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Ww is an example of .
WW is an example of .
ww is an example of .
Answer:
the answer to this question if dealing with biology should be;
Ww is an example of a Heterozygous allele
WW is an example of a Homozygous Dominant allele
ww is an example of a Homozygous recessive allele
Explanation:
this is due to the way scientists tend to write traits. this is the likely result of the box method of doing so
Ww is an example of a Heterozygous allele
WW is an example of a Homozygous Dominant allele
ww is an example of a Homozygous recessive allele
Explanation: This is due to the way scientists tend to write traits. this is the likely result of the box method.
Which information must be known about a compound to find the
cular formula from the empirical formula?
Answer: the relative molecular mass of the compound
Explanation:
A 14.630 g milk chocolate bar is found to contain 9.315 g of sugar.
Question: A 14.630 g milk chocolate bar is found to contain 9.315 g of sugar
How many milligrams of sugar does the milk chocolate bar contain
Answer:
"9315 mg" of sugar has the milk chocolate bar
Explanation:
Given that the 14.630 g milk chocolate has 9.315 g of sugar
We have to convert 9.315 grams to milligrams
We know that 1 gram = 1000 mg
So
9.315 gram = [tex]9.315 \times 1000[/tex]
9.315 gram = 9315 mg
Therefore, the milk chocolate bar has 9315 mg of sugar.
What is the heaviest noble gas?
A.Helium
B.Radon
C.Fluorine
D.Astatine
Answer:
Radon is the heaviest Noble Gas
Explanation:
This statement is very easy to be solved. As we know that Noble Gases are group of Elements which have complete valence shell and are stable elements and don't react easily and hence, are found in mono-atomic form in nature. These elements can be found on the extreme right of the periodic table in group 8 or group 18. Following are the Noble elements,
(i) Helium
(ii) Neon
(iii) Argon
(iv) Xenon
(v) Radon
Now,
In statement we are provided with only two noble gases i.e. Helium and Radon. Therefore, it is easy among them to finalize the heaviest one as Radon having atomic mass of 222.02 g/mol and atomic radii of 0.22 nm is much denser/heavier than Helium having atomic mass of 4.0 g/mol and atomic radii of 0.122 nm.
Q5. The table below shows the melting points and boiling points of four elements
Melting Point (°C) Boiling Point (°C)
357
-39
Element
Mercury
Copper
Nitrogen
Calcium
1085
2562
-210
-196
842
1484
Answer the following using the table above. Which element in the table is:
(i) a liquid at 0°C?
(ii) a solid at 1000°C?
(iii) a gas at 500°C?
(iv) What state is Nitrogen at -200°C?
i. Mercury
ii. copper
iii. Mercury
iv.Nitrogen becomes a liquid at -200°C. Liquid nitrogen looks like water
Mercury is a liquid at 0°C, Copper is solid at 1000°C, Nitrogen is a gas at 500°C, and Nitrogen is a gas at -200°C.
Explanation:(i) The element that is a liquid at 0°C is Mercury. It has a melting point of -39°C and a boiling point of 357°C, so it is in liquid state at 0°C.
(ii) The element that is a solid at 1000°C is Copper. It has a melting point of 1085°C, which means it remains in solid state at 1000°C.
(iii) The element that is a gas at 500°C is Nitrogen. It has a boiling point of -196°C, so it has already changed into a gas at 500°C.
(iv) Nitrogen at -200°C is in the gas state. Its boiling point is -196°C, which means it has already changed into a gas at -200°C.
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What is the role if mutations in genetic variation and the diversity of living things? Use human inheritance examples as evidence.
Explanation:
Mutations on DNA create genetic variation and diversity on which natural selection acts upon. Mutation can be advantageous, disadvantageous or neutral. Those mutations that confer advantage are preserved in the population while those that are DISadvantageous are weeded out. This occurs because advantageous traits that give a particular advantage to individuals in the environment, however slightest, give them an increased chance of survival and passing their genes to subsequent generations.
An example is mutation that causes sickle cell-shaped blood cells. Individuals with sickle cell blood are less likely to contract malaria. Therefore in an environment where malaria is endemic, the population will have a higher allele frequency for sickle cell alleles that populations in non-endemic areas.
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How many grams are in 1.3 x 1024 atoms of hydrogen?
Answer: 4.32g
Explanation:
MM of H2 = 1 x 2 = 2g/mol
2g of H2 contains 6.02x10^23 atoms.
Therefore Xg of H2 will contain 1.3 x 1024 atoms i.e
Xg of H2 = (2 x 1.3 x 1024) / 6.02x10^23 = 4.32g
How do the resonance structures for ozone, 03, differ?
A. They have different numbers of atoms.
B. They have atoms in different positions.
C. They have different numbers of electrons.
D. They have electrons in different locations.
The resonance structures of ozone differ only in the location of electrons in the structure.
The idea of resonance structures are invoked when a single structure does not sufficiently explain the bonding characteristics of a chemical species. The resonance structures show the different possible bonding extremes in the substance.
In the resonance structures of ozone, all the contributing structures only differ in the location of the electrons in the structure.
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Final answer:
The ozone molecule has resonance structures that differ by the location of electrons around the oxygen atoms, with the positions of the atoms remaining unchanged.
Explanation:
The resonance structures for ozone (O3) differ because they have electrons in different locations. Both structures have the same number of atoms and the same total number of electrons, which is 18. However, what changes between the resonance structures of ozone is the arrangement of these electrons around the oxygen atoms. The positions of the oxygen atoms remain unchanged. The use of double-headed arrows is common to illustrate that the two structures are resonance forms of the same molecule, indicating the shifting of electron locations without altering the atomic positions.
The chemical formula for the unknown molecule shown above is...
Answer:
the answer is A
Explanation:
The chemical formula is C₂H₅OH and the correct answer is C
What is a Chemical Formula ?A Chemical Formula is used to identify the constituent atoms / elements present in the sample and also the proportion in which the elements are mixed.
In the above figure given it can be seen that the colour of the molecules are being used to determine the Type of molecule
It can be easily observed that in the unknown molecule the carbon atom is connected to another carbon atom
The first Carbon atom is connected to 3 Hydrogen atom
and the second Carbon atom is connected to 2 Hydrogen and one Oxygen atom , The oxygen atom is connected to one Hydrogen atom.
So the chemical formula is C₂H₅OH and the correct answer is C
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1. Zinc reacts with steam according to the equation:
Zn) + H2O → ZnO + H2
What mass of zinc oxide is formed from 41.6g of zinc?
+ H2(g)
2. Sulfur burns in air to form sulfur dioxide according to the equation:
S(s) +
O2(g)
→ SO2(g)
What volume of sulfur dioxide is produced (at room temperature
24 of sulfur?
Answer:
1) mass ZnO = 55.155 g
2) V SO2(g) = 18.289 L
Explanation:
1) Zn + H2O → ZnO + H2
∴ mass Zn = 41.6 g
∴ mm Zn = 65.38 g/mol
⇒ mol Zn = (41.6 g)(mol/61.38 g) = 0.678 mol Zn
⇒ mol ZnO = (0.678 mol Zn)(mol ZnO/mol Zn) = 0.678 mol ZnO
∴ mm ZnO = 81.38 g/mol
⇒ mass ZnO = (0.678 mol ZnO)(81.38 g/mol) = 55.155 g ZnO
2) S(s) + O2(g) → SO2(g)
∴ mass S(s) = 24 g
∴ T = 25°C ≅ 298 K
∴ P = 1 atm
∴ mm S(s) = 32.065 g/mol
⇒ mol S(s) = (24 g)(mol/32.065 g) = 0.7485 mol S(s)
⇒ mol SO2(g) = (0.7485 mol S(s))(mol SO2(g)/mol S(s)) = 0.7485 mol SO2(g)
ideal gas:
PV = RTn⇒ V SO2(g) = ((0.082 atm.L/K.mol)(298 K)(0.7485 mol))/(1 atm)
⇒ V SO2(g) = 18.289 L SO2(g)
Dihydrogen dioxide decomposes into water and oxygen gas. Calculate the amounts requested if 1.34 moles of dihydrogen dioxide react according to the equation.
You must show all units.
a. Moles of oxygen formed
b. Moles of water formed
c. Mass of water formed
d. Mass of oxygen formed
Answers:
a. Moles of oxygen formed: 0.670 mol
b. Moles of water formed: 1.34 mol
c. Mass of water formed: 24.1 g
d. Mass of oxygen formed: 21.4 g
Explanation:
Dihdyrogen dioxide is the chemical name for a compound made of two hydrogen atoms and two oxide atoms, i.e. H₂O₂, which is also known as hydrogen peroxide or oxygenated water.
The decomposition reaction of dihydrogen dioxide into water and oxygen gas is represented by the balanced chemical equation:
[tex]2H_2O_2(l)\rightarrow 2H_2O(l)+O_2(g)[/tex]
The mole ratios derived from that balanced chemical equation are:
2 mol H₂O₂ : 2 mol H₂O : 1 mol O₂a. Moles of oxygen formed
Set the proportion using the theoretical mole ratio of H₂O₂ to O₂ and the amount of moles of dyhydrogen dioxide that react:[tex]2\text{ mol }H_2O_2/1\text{ mol }O_2=1.34\text{ mol }H_2O_2/x[/tex]
When you solve for x, you get:
x = 1.34 mol H₂O₂ × 1 mol O₂ / 2 mol H₂O₂ = 0.670 mol O₂b. Moles of water formed
Set the proportion using the theoretical mole ratio of H₂O₂ to H₂O and the amount of moles of dyhydrogen dioxide that react:[tex]2\text{ mol }H_2O_2/2\text{ mol }H_2O=1.34\text{ mol }H_2O_2/x[/tex]
When you solve for x, you get:
x = 1.34 mol H₂O₂ × 2 mol H₂O / 2 mol H₂O₂ = 1.34 mol H₂Oc. Mass of water formed
Using the number of moles of water calculated in the part b., you calculate the mass of water formed, in grams, using the molar mass of water:
Molar mass of water = 18.015 g/molNumber of moles = mass in grams / molar mass⇒ mass in grams = number of moles × molar mass
⇒ mass in grams = 1.34 mol × 18.015 g/mol = 24.1 g
d. Mass of oxygen formed
Using the number of moles of oxygen determined in the part a., you calculate the mass in grams using the molar mass of O₂.
Molar mass of O₂ = 32.00 g/molmass = molar mass × number of moles mass = 32.00 g/mol × 0.670 mol = 21.4 g.At what time would the velocity reach 60.00 km/hr? It will never travel at 60.00 km/hr. It travels at a different constant rate. 10.00 seconds 100.00 seconds... i found the answer its 10.00 seconds.
Answer:
They’re correct it is 10 seconds
Explanation:
Answer: 10 seconds
Explanation:
Please help my class ends in a couple hours
Which term describes a mixture of oxygen gas dissolved in water?
Select all that apply.
Suspension
Solution
Liquid-gas
Heterogeneous mixture
Homogeneous mixture
Gas-liquid
Answer:
Homogeneous mixture
Solution
Liquid-gas
Hope this helps, hope its not late.
Answer:
Homogeneous mixture
Solution
Liquid-gas
Explanation:
Based on the visible light spectrum, which of the following has the longest wavelength?
A.
a ray of orange light
B.
a ray of green light
C.
a ray of blue light
D.
a ray of violet light
HELP PLEASEEEE
Answer:
I think the answer is D a ray of violet light
Hope it helps!