A clear prediction of the anticipated results in an experimental design is known as "Hypothesis".
Explanation:
A theory or hypothesis are often used clearly as a suggested event descriptive one. The scientific methods need that one can be able to examine for a hypothesis termed as scientific hypothesis.
A working in hypothesis is a proposed provisionally accepted hypothesis for on-going research that starts with an appropriate amount of conclusion and thoughts, also known as "Educated Guess".
According to researchers like Schick and Vaughn the weighing up an alternative hypotheses might be taken into understanding like Parsimony, testability, Fruitfulness, Scope and Conservatism.
How many moles are in 3.60 g of H20?
Answer: 0.2 moles H2O
Explanation: 1 mole of H2O is equal to the molar mass of water
Solution:
3.60 g H2O x 1mol H2O / 18 g H2O
= 0.2 mol H2O
which type of fertilization and development is exhibited by birds and many reptiles?
Answer: Internal fertilization
Explanation: Most birds and reptiles undergoes internal fertilization in which the sperm cells are ejected and fertilizes the egg cell inside the body of the animal.
Birds and many reptiles undergo oviparity, where internal fertilization leads to the laying of hard-shelled eggs that develop outside the parent's body. The calcified eggshell provides protection and the amniotic cavity within offers a stable environment for the embryo. This adaptation facilitates thriving in diverse, often drier habitats.
Explanation:Birds and many reptiles exhibit a type of fertilization and development known as oviparity. In this process, internal fertilization occurs within the parent's body, but the offspring develop outside of the parent's body. The fertilized eggs are laid by the female, and the embryo develops receiving nourishment from the egg's yolk within an eggshell enriched with calcium carbonate, which makes the shell hard. An example of an oviparous animal is the chicken, whose eggs we are commonly familiar with. This mechanism provides protection to the embryos and has allowed these species to thrive in various environments, leading to less dependence on water for the development of the young.
Reptiles and birds possess four extraembryonic membranes: the yolk sac, the amnion, the chorion, and the allantois. The amnion creates an aquatic environment for the embryo, which is significant for their terrestrial lifestyle. Through oviparity, reptiles and birds have adapted to drier environments, an evolutionary advantage over their amphibian relatives.
A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/weight % or percent by mass of the solute? (I got 5.64% but it said it was incorrect, and I can't figure it out?)
Answer:
A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :
2.67%
Explanation:
Note : Look at the density of potassium nitrate in water if given in the question.
You are calculating weight /Volume not weight/weight % or percent by mass of the solute
Here the weight/weight % or percent by mass of the solute is asked : So first convert the VOLUME OF SOLUTION into MASS
Density of potassium nitrate in water KNO3 = 2.11 g/mL
[tex]density=\frac{mass}{volume}[/tex]
Density = 2.11 g/mL
Volume of solution = 86.4 mL
[tex]2.11=\frac{mass}{86.4}[/tex]
[tex]mass = 2.11\times 86.4[/tex]
[tex]mass=182.3grams[/tex]
Mass of Solute = 4.87 g
Mass of Solution = 183.2 g
w/w% of the solute =
[tex]= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100[/tex]
[tex]=\frac{4.87}{183.2}\times 100[/tex]
w/w%=2.67%
Answer:
it's 5.63. I guess you don't round your answer.
Explanation:
How is primary succession similar to secondary succession
Answer:
hu?
Explanation:
Explain how the processes that occur at mid-ocean ridges and ocean trenches illustrate the cycling of matter.
Explanation:
This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary. The other process proposed to contribute to the formation of new oceanic crust at mid-ocean ridges is the "mantle conveyor".
Mid-ocean ridges and ocean trenches has been result in the cycling of matter with the movement of tectonic plates.
Cycling of matter has been defined as the transfer of matter from one place to another. The transfer of matter has been achieved within the ecosystem.
Mid-ocean ridges and ocean trenchesThe mid-ocean ridges have been present in the part of the divergent plate boundaries. The ocean trenches have been the convergence of the tectonic plates.
The convergence and divergence of the tectonic plates results in the transfer of matter from one place to another. Thus, mid-ocean ridges and ocean trenches has been result in the cycling of matter with the movement of tectonic plates.
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is the group number the number of electrons on the outermost shell
How many moles of molecules are in 10 g of aspartame?
Answer:
molecules
Explanation:
Data Given:
mass of aspartame = 10 g
molecules of aspartame = ?
Solution
First we calculate no. of moles of 10 g aspartame
For which mole formula will be used
no. of moles = mass in grams / molar mass . . . . . . .(1)
Formula of aspartame:
C₁₄H₁₈N₂O₅
So,
The molar mass of aspartame (C₁₄H₁₈N₂O₅) will be
molar mass of C₁₄H₁₈N₂O₅ = 14(12) + 18(1) + 2(14) +5(16)
molar mass of C₁₄H₁₈N₂O₅ = 168 + 18+ 28 + 80
molar mass of C₁₄H₁₈N₂O₅ = 294 g/mol
put values in equation 1
no. of moles = 10 g / 294 g/mol
no. of moles = 0.034 mol
now we will calculate no. of molecules
Formula will be used
no. of moles = no. of molecules / Avogadro's number
Rearrange the above equation:
no. of molecules = no. of moles x Avogadro's number . . . . . (2)
Where
Avogadro's number = 6.022 x 10²³
Put values in equation 2
no. of molecules =0.034 mol x 6.022 x 10²³ (molecules/mol)
no. of molecules = 2.0475 x 10²²
So,
There are 2.0475 x 10²² molecules are in 10 grams of aspartame that is 0.034 moles of aspartame.
So, in turn its 0.034 moles of molecules are in 10 g of aspartame.
The moles of molecules are in 10 g of aspartame - 0.034 × 10¹⁹
The number of molecules of a given mass of a substance using the molar mass of the substance and Avogadro's constant, 6.022 × 10²³
Molecular formula of aspartame = C₁₄H₁₈N₂O₅ Molecular mass of aspartame = ( 12 * 14 ) + ( 1 * 18 ) + ( 14 * 2 ) + ( 16 * 5 ) = 294 Let's convert the given mass, 10 mg to moles of aspartame:The number of moles = [tex]mass\ of\ the\ substance * \frac{1}{molecular\ mass}[/tex]
= [tex]\frac{10}{294}[/tex]
= 0.034 × 10 ⁻⁵ mole
Using Avogadro's constant, we can convert this value to molecules as so:
= 0.034 × 10 ⁻⁵ (6.022 × 10²³)
= 0.034 × 10¹⁹
Thus, the moles of molecules are in 10 g of aspartame - 0.034 × 10¹⁹
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what is the mass prevent of manganese (mn) in potassium permanganate (KMnO4)
Answer:
Mass percent of Mn is 34.76 %
Explanation:
Mass percent of an element is the mass of that element divided by the total mass of the elements forming that compound (or molecular mass.
So,
Mass percent of Mn will be given as,
%Mn = Atomic Mass of Mn / Molecular Mass of KMnO₄ × 100
So,
Atomic Mass of Mn = 54.94 g/mol
Molecular Mass of KMnO4 = 158.034 g/mol
Putting values in above formula,
%Mn = 54.94 g/mol ÷ 158.034 g/mol × 100
%Mn = 34.76 %
how many molecules of NaCl are there in 250 grams of table salt
Answer:
4.27 moles of NaCl
Explanation:
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
Number of moles of NaCl(table salt) = 250 grams /58.5 g/mol
= 4.27 moles of NaCl
ANSWER ASAP! WILL GIVE BRAINLIEST!
While testing the air bags in a car, engineers observed that the compressed air in the bags expanded on impact. Which of the following best justifies the type of changes taking place during the process?
1. Physical change because heat of combustion is a chemical property.
2. Chemical change because heat of combustion is a chemical property.
3. Physical change because compressibility is a physical property.
4.Chemical change because compressibility is a physical property.
Answer:
. Physical change because compressibility is a physical property.
Explanation:
I took a test with this in it and this was right.
Answer:
C
Explanation:
the answer is c because compressibility is a physical property
Help with with percent yield
Answer:
Percent yield = 63.3%
Explanation:
Given data:
Mass of copper = 32.89 g
Mass of oxygen = 32.89 g
Mass of copper(II) oxide formed = 26.20 g
Mass of calcium chloride produced = ?
Solution:
The actual yield of reaction is the amount that you have recovered such as 26.20 g.
Theoretical yield will be calculated in the following way,
Chemical equation:
2Cu + O₂ → 2CuO
Number of moles of Cu:
Number of moles = Mass /molar mass
Number of moles = 32.89 g / 63.55 g/mol
Number of moles = 0.52 mol
Number of moles of O₂:
Number of moles = Mass /molar mass
Number of moles = 32.89 g / 32 g/mol
Number of moles = 1.03 mol
Now we will compare the moles of CuO with Cu and O₂.
O₂ : CuO
1 : 2
1.03 : 2.06
Cu : CuO
2 : 2
0.52 : 0.52
The number of moles of CuO produced by Cu are less so it will limiting reactant.
Mass of CuO: (THEORETICAL YIELD)
Mass = number of moles × molar mass
Mass = 0.52 mol × 79.55 g/mol
Mass = 41.4 g
Percent yield:
Percent yield = actual yield / theoretical yield × 100
Percent yield = 26.20 g/ 41.4 g × 100
Percent yield = 63.3%
Question 1 of 10
2 Points
What is the name of this molecule?
O
Which of these is a concern with respect to using fuel cell cars?
O use of non-renewable resources
O cost of the distribution network
battery recharge or replacement
reliance on petroleum products
Answer:
Cost of the distribution network
Explanation:
The cost of building a distribution network is the major concern. Each refill station costs about $1.5 million.
A is wrong. Hydrogen comes from water, which is plentiful in the oceans. When hydrogen reacts in the fuel cell, the water is re-formed
C is wrong. The fuel cell will last for about 300 000 km.
D is wrong. Although hydrogen can be produced from petroleum, water is the most likely source.
Answer:
B. Cost of the distribution network
Explanation:
What is the mole fraction of NaOH in an aqueous solution that contains 15% NaOH by mass?
Answer:
0.074
Explanation:
15% means that in 100 g of solution 15 g sodium hydroxide is present.
Mass of water = 100 - 15 = 85 g
Number of moles of sodium hydroxide:
Number of moles = 15 g/40 g/mol
Number of moles = 0.375 mol
Number of moles of water:
Number of moles = 85 g/18 g/mol
Number of moles = 4.7 mol
Moles fraction of NaOH:
moles of NaOH/ moles of solvent + moles of solute
0.375 mol/ 0.375 mol+4.7mol
0.375 mol / 5.075 mol
0.074
4 C3H6 + 6 NO --> 4 C3H3N + 6 H2O + N2
If 24 moles of NO react, how many moles of nitrogen gas will be produced??
Answer:
4 moles of Nitrogen gas is produced.
Explanation:
Is in the picture. I used mole ratio.
Hope this helps!
1. Which out of the following elements has the lowest electronegativity: Lithium, Beryllium, Magnesium, Sodium
2. Which out of the following elements has the least metallic character: Lithium, Beryllium, Magnesium, Sodium
3. Which out of the following elements is the largest atom: Lithium, Beryllium, Magnesium, Sodium
Explanation:
Sodium (Na) which is a delicate, shimmering white, profoundly responsive soluble base metal loses an electron to a chlorine iota since it has seven electrons in its valence shell. It needs one more electron to turn into a steady molecule. It has the most reduced electronegativity of the given components. Beryllium (Be) is a light, silver-gray, relatively soft metal that is strong but brittle has the least metallic character of the given elements.Since from left to right in a period, Metallic character decreases while nonmetallic character increases from top to bottom.Sodium(Na) is the largest atom among the given elements since Atomic size decreases across a period from left to right and increases from top to bottom.Sodium has lower electronegativity value and a largest atom as compared to given element whereas beryllium has least metallic character.
The element Sodium (Na) has a low electronegativity as compared to other given elements. The electronegativity values of sodium is 0.93, beryllium has 1.57, magnesium has 1.31 and lithium has 0.98 so we can say that sodium has lower electronegativity value.
The element Beryllium (Be) has the least metallic character because beryllium is present at the top of the periodic table. When we go from top to bottom metallic character increases and decreases from left to right in the periodic table.
The element Sodium (Na) has the largest atom among these elements because of more number of shells added when we go from top to bottom which make higher the radius of sodium as well as size so we can conclude that sodium has lower electronegativity value and a largest atom as compared to given element whereas beryllium has least metallic character.
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How many inches are in 2.0 miles
There are 126,720 inches in 2.0 miles, calculated by multiplying the number of miles (2.0) by 63,360 inches per mile.
The student asked, "How many inches are in 2.0 miles?" To answer this question, we need to use a direct conversion factor. There are 63,360 inches in a mile because there are 5,280 feet in a mile and each foot has 12 inches. Therefore, to convert miles to inches, you can multiply the number of miles by 63,360.
For 2.0 miles, the calculation would be:
Multiply the number of miles by the number of feet in a mile: 2.0 miles x 5,280 feet/mile = 10,560 feet.Multiply the total number of feet by the number of inches in a foot: 10,560 feet x 12 inches/foot = 126,720 inches.So, there are 126,720 inches in 2.0 miles.
An empty beaker weighs 49.03 g. When completely filled with water, the beaker and its contents have a total mass of 267.05 g. What volume does the beaker hold? Use d = 1.00 g/mL as the density of water.
Answer:
218.02 mL
Explanation:
Data Given:
weight of the empty beaker = 49.03 g
weight of water and beaker = 267.05 g
density of water = 1 g/mL
Solution:
As we know that the volume that beaker hold is the volume of water that occupied by it.
For this first we have to find mass of the water in the beaker
This can be calculated by the subtraction of beaker's weight from the weight of beaker and water.
weight of water (m) = total weight - weight of beaker
put values in the above formula
weight of water (m) = 267.05 g - 49.03 g
weight of water (m) = 218.02 g
To find volume we will use density formula
d = m/v
rearrange the above equation to calculate volume
v = m/d . . . . . . . (1)
put values in equation 1
v = 218.02 g / 1 (g/mL)
v = 218.02 mL
The volume that beaker hold = 218.02 mL
1 Point
Which statement best describes the polarity of the molecule H,S?
A. It is polar, because the bond polarities add together in a linear
molecule.
B. It is nonpolar, because the bond polarities cancel each other out in
a linear molecule.
O
c. It is polar, because the bond polarities add together in a bent
molecule.
O
D. It is nonpolar, because the bonds between hydrogen (H) and sulfur
(s) are not polar.
Answer:
The correct Option is C (It is polar, because the bond polarities add together in a bent molecule.)
Explanation:
The molecular structure of Hydrogen Sulfide (H₂S) is attached below;
The molecule of Hydrogen Sulfide is polar due to following two reasons;
1) Electronegativity Difference:
Sulfur has an electronegativity of 2.58 while that of Hydrogen is 2.20. Hence, sulfur being more electronegative attracts the electron fro hydrogen making it slightly partial positive and increasing electron density and becoming slightly partially positive. So, we can call this bond as slightly polar bond.
2) Dipole Moment:
Dipole moment occurs when the bond is polar. Being a vector quantity it strongly depends upon the geometry of a molecule. In H₂S the two polar bonds cannot cancel each other because they are not in opposite direction as that found in case of CO₂. Hence, H₂S is a polar compound.
Hydrogen sulfide (H2S) is polar due to the differences in electronegativity between hydrogen and sulfur and its bent molecular shape, which prevent the bond polarities from canceling each other out.
Explanation:The correct option is C, 'H2S is polar because the bond polarities add together in a bent molecule'. The molecule hydrogen sulfide (H2S) is indeed polar. This is due to the fact that sulfur is more electronegative than hydrogen, creating a dipole moment in the bond. As the molecule is not symmetric, the polarities do not cancel out, making the molecule overall polar. In geometrical terms, the H2S molecule forms a 'bent' or 'V' shape, similar to water (H2O).
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2NO2(g) Equilibrium N2O4(g)
NO2 and N2O4 undergo the reaction shown. When a sealed container of NO2 reaches chemical equilibrium, which must be true?
f The maximum number of molecules has been reached.
g No N2O4 is present.
h The rates of the forward and reverse reactions are equal.
j No chemical reactions are occurring.
Answer:
h The rates of the forward and reverse reaction are equal.
Explanation:
The reaction takes place in a closed container . So both the reactant (NO₂) and product N₂O₄ are present in the reaction container. Under such conditions, the reaction reaches chemical equilibrium. At chemical equilibrium the rates of the forward and reverse reactions are equal. The concentration of the reactants and products remain constant at Chemical Equilbrium.
What compound is formed when the soft putty-like metal sodium (Na) reacts with the green-colored poisonous gas chlorine (C12)?
A. sulfuric acid
B. table sait
C. sodium hydroxide
D. sugar
Answer:
Option-B (Table Salt) is the correct answer.
Explanation:
Salt formation takes place when Metal (like Na) and Non-metals (like Cl₂) are reacted. In given statement the reaction will be as follow:
2 Na + Cl₂ → 2 NaCl
Above reaction can be divided as;
Oxidation Reaction:
The Sodium Atom (Na) being metal loses its single valence electron to attain a stable noble gas configuration as,
Na → Na⁺ + 1 e⁻
Reduction Reaction:
The Chlorine Atom being non-metals accepts the electron from Na atom and changes into Chloride ion as,
Cl₂ + 2 e⁻ → 2 Cl⁻
Formation of Salt:
Hence, the Na⁺ and Cl⁻ formed attracts each other and form an Ionic bond as,
Na⁺ + Cl⁻ → NaCl
Note: You should remember that NaCl (Sodium Chloride) is also known as Table Salt :)
Final answer:
When sodium (Na) reacts with chlorine (Cl₂), the compound formed is table salt (option B), or sodium chloride (NaCl). The reaction is a synthesis of two reactive elements creating an ionic bond to form a stable, commonly used condiment and preservative.
Explanation:
The compound that is formed when the soft putty-like metal sodium (Na) reacts with the green-colored poisonous gas chlorine (Cl₂) is table salt (option B), which is chemically known as sodium chloride (NaCl). The reaction can be represented by the equation:
2 Na(s) + Cl₂ (g) → 2 NaCl(s)
This chemical reaction involves a transfer of electrons from sodium to chlorine, resulting in the formation of Na⁺ ions and Cl⁻ ions, which bond together to form the ionic compound sodium chloride. Sodium is a very reactive metal and chlorine is a correxive gas that should not be inhaled, but when these two are combined, a stable and harmless compound, table salt, is produced.
PLEASE HURRY!!!
Biodiversity is the _____________________________. Question 8 options:
The process of converting nitrogen gas in the air into nitrates in the soil.
Use of organisms to inspire technology or engineering projects.
Measurement of the amount of variation of the species in a given area.
The dying out of a species so that no members of the species exist anymore.
Answer:
Measurement of the amount of variation of the species in a given area.Explanation:
Bio preffix means life. Thus, literally, biodiversity means how diverse is the life. This is, how many different organisms an ecosystem or biome has.
Thus, biodiverstiy, although more complex than just that, is a measure of the number of species that live in a region.
The biome with most species than any other, this is the biome with the greatest biodiversity, is the tropical rainforest biome, which are located near the equator. As you can imagine, a large number of different plants, animals, and microorganisms live in these forests, making them the regions with greatest biodiversity on the planet.
if 120 ml of oxygen is collected over water at 27 degrees celsius & 740 mm pressure what will the volume of the dry gas be at STP
Answer:
V₂ = 106.33 ml
Explanation:
Data Given:
Initial Temperature = T₁ = 27 °C + 273.15 = 300.15 K
Initial Pressure = P₁ = 740 mmHg
Initial Volume = V₁ = 120 ml
Final Temperature = T₂ = 0 °C + 273.15 = 273.15 K
Final Pressure = P₂ = 760 mmHg
Fnal Volume = V₂ = ?
Formula Used:
Let's assume that the Oxygen gas is acting as an Ideal gas, the according to Ideal Gas Equation,
P₁ V₁ / T₁ = P₂ V₂ / T₂
Solving for V₂,
V₂ = P₁ V₁ T₂/ T₁ P₂
Putting values,
V₂ = 740 mmHg × 120 ml × 273.15 K / 300.15 K × 760 mmHg
V₂ = 106.33 ml
The volume of dry oxygen gas at STP is approximately 95.3 mL.
To find the volume of dry oxygen gas at STP (Standard Temperature and Pressure), we will follow these steps:
First, we need to calculate the partial pressure of the dry oxygen. The total pressure (740 mmHg) includes the vapor pressure of water at 27°C, which is 26.7 mmHg.
Subtract the vapor pressure of water from the total pressure to find the pressure of the dry gas:
Pdry gas = Ptotal - Pwater vapor
Pdry gas = 740 mmHg - 26.7 mmHg = 713.3 mmHg
Use the Ideal Gas Law to convert the volume of dry gas to STP conditions.
Remember that STP is 0°C (273.15 K) and 1 atm (760 mmHg).
Using the combined gas law: (P₁ * V₁ / T₁) = (P₂ * V₂ / T₂)
V₂ = (P₁ * V₁ * T₂) / (P₂ * T₁)
Insert the values: P₁ = 713.3 mmHg, V₁ = 120 mL, T₁ = 300.15 K (27°C + 273.15), P₂ = 760 mmHg, T₂ = 273.15 K
[tex]V_2 = \frac{713.3 \, \text{mmHg} \times 120 \, \text{mL} \times 273.15 \, \text{K}}{760 \, \text{mmHg} \times 300.15 \, \text{K}}[/tex]
V₂ ≈ 95.3 mL
Therefore, the volume of the dry oxygen gas at STP is approximately 95.3 mL.
The manager at Gabriela's Furniture Store is trying to figure out how much to charge for a book shelf that
just arrived. The book shelf was bought at a wholesale price of $147.00, and Gabriela's Furniture Store
marks up all furniture by 60%.
At what price should the manager sell the book shelf?
Answer:
The manager sold the book shelf at $235.2
Explanation:
Since we have given that
Wholesale price of the book shelf = $147.00
But Gabriela's Furniture Store marks up all furniture by 60%.
So, Mark up value is given by
= [tex]\frac{60}{100} \times 147[/tex]
= [tex]\frac{8820}{100}[/tex]
= $88.2
So, the new price that the manager sold the book shelf is given by
= 147 + 88.2
= $235.2
Therefore, the manager sold the book shelf at $235.2
Balance this chemical equation
K₂S+ CocI2 KCl + Cos
Which element has a larger volume tin or titanium?
Answer:
tin (Sn) have larger volume than titanium (Ti)
Explanation:
Data Given:
larger volume of titanium or tin?
Solution:
First we will find volume for each element.
To calculate volume of Titanium (Ti):
formula used
d = m/v
Rearrange the above formula for volume
v = m/d . .. . . .(1)
Where
v= volume
d= density
m= mass
As Reported
Mass of Titanium = 48 g/mol
density of Titanium = 4.506 g/cm³
Put values in above equation 1
v = 48 g/mol / 4.506 g/cm³
v = 10.65 cm³/mol
volume of 1 mole Titanium 10.65 cm³
_______
Now we will find volume for tin (Sn)
To calculate volume of tin (Sn):
formula used
d = m/v
Rearrange the above formula for volume
v = m/d . .. . . .(1)
Where
v= volume
d= density
m= mass
As Reported
Mass of Tin= 118.7 g/mol
density of Tin = 7.31 g/cm³
Put values in above equation 1
v = 118.7 g/mol / 7.31 g/cm³
v = 16.24 cm³/mol
volume of 1 mole Tin 16.24 cm³
So,
It is clear that tin (Sn) have larger volume than titanium (Ti)
Mercury freezes at -38.9C. What is the coldest temperature, in degrees Fahrenheit, that can be measured by using a mercury thermometer?
Answer:
Liquid thermometers can be limited by the type of liquid used. Mercury, for instance, becomes a solid at -38.83 degrees Celsius (-37.89 degrees Fahrenheit). Mercury thermometers cannot measure temperatures below this point.:
Mercury freezes at -38.9°C, which is equivalent to -37.22°F, making it the coldest temperature that can be measured using a mercury thermometer.
Explanation:Mercury freezes at -38.9°C. To convert this temperature to Fahrenheit, we can use the formula: F = (C * 9/5) + 32. Plugging in the value of -38.9°C, we get: F = (-38.9 * 9/5) + 32 = -37.22°F. Therefore, the coldest temperature that can be measured using a mercury thermometer is -37.22°F.
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Edmentum user What are the types of wastewater? Fill in the Blank You can find two types of wastewater: household and _________ wastewater.
Answer:
it could be industrial
Final answer:
Wastewater can be broadly categorized into household and industrial types. Household wastewater consists of greywater and blackwater from domestic activities, while industrial wastewater includes waste from various industries, potentially containing a range of contaminants that require specialized treatment processes.
Explanation:
You can find two types of wastewater: household and industrial wastewater.
Types of Wastewater:
Wastewater includes both sewage as well as water used in various processes. It comes from a variety of sources, and the two main categories are:
Household wastewater: This is the waste liquid from toilets, baths, showers, kitchens, and sinks that is disposed of via sewers. It includes greywater, which comes from domestic activities like laundry, dishwashing, and bathing, and blackwater, which is water combined with human waste from toilets.Industrial wastewater: This type of wastewater is from industrial establishments and can include a variety of contaminants depending on the industry. It may contain chemicals, heavy metals, or organic pollutants that require specialized treatment before being released back into the environment.Wastewater Treatment:
Wastewater treatment plants process wastewater through three phases:
Primary: Solid removalSecondary: Bacterial decompositionTertiary: Extra filtrationThe aim of these treatments is to reduce pollutants and solids, thereby lessening the environmental impact when the treated water is released back into ecosystems or reused for irrigation and other non-potable purposes.
Calculate answers to the following problems to the correct number of significant figures. 30.07g/0.106mL=
Answer:
d = 283.68 g/mL
Explanation:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
Symbol:
The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.
Here the unit given are gram/ milliliter. The given data shows that its density, because,
density = mass/ volume
d = m/v
d = 30.07 g/ 0.106 mL
d = 283.68 g/mL
2 Pb(NO3)2 – 2 PbO + 4 NO2 + O2
Explanation:
Chemical reaction
When two or more substances react and form some new substance it is called as chemical reaction .
There are so many reactions , out of which decomposition is also one type .
It is explained below :
Decomposition reaction
it is the type in which a reactant breaks up into its constituents either by heating or passing current or in presence of light .
That is :
(a) Photo decomposition (breaking in presence of light )
Examples AgCl-----Ag+Cl₂
(white ) (grey )
(B)Electrolytic decomposition : breaking by passing current
Example : NaCl------Na+Cl₂
©Thermal decomposition : breaking by heating )
Example : Pb(No₃)₂-----PbO+NO₂+O₂
(reddish brown gas )
ACTIVITY TO DEMONSTRATE : heating of ferrous sulphate
FeSO₄.7H2O------FeSO₄+7H₂O
(GREEN )
FeSO₄-----------------heat -------Fe₂O₃+SO₂+SO₃
This question is done considering : Identify the type of reaction
2 Pb(NO3)2 – 2 PbO + 4 NO2 + O2