Answer:
it would be 98 precent ....
Which of the following is considered a Green House Gas?
Answer:
Greenhouse gases (GHG) include carbon dioxide, water vapor, methane, ozone, nitrous oxide and fluorinated gases. These molecules in our atmosphere are called greenhouse gases because they absorb heat.
Explanation:
Describe in detail an experiment using only hot and cold water that would enable you to
verify that the heat capacity of your coffee-cup calorimeter is about 1.0 x 10' J/°C. Be
specific about the procedure you would follow and the calculations you would need to
perform?
Based on the principle of conservation of energy, the heat capacity of the calorimeter is calculated using the formula:
c = {m2 × w × (t2 - t1) - m2 × w × (t2 -t1)}/m3 × (t2 -t1)What is a calorimeter?A calorimeter is an equipment used to determine heat of reaction.
The calorimeter works on the principle of conservation of energy:
heat gained = heat lostQuantity of heat energy is calculated using the formula below:
q = mass × heat capacity × temperature differenceIn the experiment, the following procedure is followed:
Mass of the hot water, cold water and calorimeter are recorded temperature of the hot water is recordedtemperature of the the cold water and calorimeter is recorded final temperature of the mixture is recorded heat capacity of the calorimeter is calculated using the formula: heat gained by calorimeter and cold water = heat lost by hot water.Assuming that;
mass of hot water = m1 mass of cold water =m2mass of calorimeter = m3initial temperature cold water and calorimeter = t1final temperature of mixture = t2heat capacity of water = wheat capacity of calorimeter = cTherefore, the heat capacity of the calorimeter is calculated using the formula:
c = {m2 × w × (t2 - t1) - m2 × w × (t2 -t1)}/m3 × (t2 -t1)Learn more about calorimeters at: https://brainly.com/question/1407669
The article also mentions
hydrogen
gas. Scientists hope to learn about
gas giants
from compressing this gas.
Answer:
By size, Jupiter reigns supreme in our solar system. This gas giant has 11 times the diameter of Earth. Astronomers have spotted even larger gas giants, such as the exoplanet Kepler-7b, located 1,400 light years away from Earth.
In our solar system, Jupiter and Saturn are gas giants. These planets make Earth look tiny. The diameter of Jupiter is 11 times bigger than that of Earth, and Saturn’s is nine times bigger. Some people also include Uranus and Neptune in the gas giant category. They have a lot of hydrogen and helium in their atmospheres. But these planets also have water, methane and ammonia, and so NASA places them in their own group.
Astronomers have spotted gas giants outside our solar system. Like Jupiter and Saturn, they aren’t very dense. But they can be even bigger or hotter than our solar system’s gas giants.
Explanation:
Hope it helps
Problem 2:
A company want to analyze moisture content of wheat flour before using to make bread. A technician use
the rapid moisture analyzer to measure the moisture content of the flour. After analyzing, the machine
showed the data of 11.2%. So how much amounts of water do we need to add to the flour to increase the
moisture content to 68% for breadmaking?
How many molecules of SO₃ can be formed from 0.75 moles of O₂ (assuming excess SO₂) from the following UNBALANCED equation?
SO₂(g) + O₂(g) → SO₃(g)
2 SO₂(g) + O₂(g) => 2SO₃(g)
moles SO₃ = 2/1 x moles O₂ = 2/1 x 0.75 = 1.5 moles
molecules = 1.5 x 6.02 x 10²³ (avogadro's number) = 9.03 x 10²³ molecules
By balancing the reaction, it is clear that one mole of oxygen gas produces 2 moles of sulphur trioxide (SO₃) and thus, 0.75 moles of O₂ will produce 1.5 moles of SO₃.
What is sulphur trioxide?Sulphur trioxide is a covalent compound formed from the combination of sulphur dioxide with atmospheric oxygen. This reaction is an example of combination reaction.
The balanced chemical equation for the reaction of O₂ with sulphur dioxide is written as follows:
[tex]\rm2SO_{2}(g) + O_{2} (g) \rightarrow 2 SO_{3}[/tex].
As per the balanced reaction, one mole of oxygen produces two moles of the product sulphur trioxide. Hence, the number moles of SO₃ formed from 0.75 moles of oxygen gas is calculated as follows:
no.of moles of SO₃ = (2 × 0.75) /1
= 1.5 moles.
Therefore, the number of moles of SO₃ formed from 0.75 moles of O₂ is 1.5 moles.
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how many atoms are in 3Na2SO4
- The bending of light as it passes at an angle from one type
of matter to another is called
Describe the composition of humus and why it is an effective organic fertilizer.
Answer:
chemical fertilizers increase crop production; their overuse has hardened the soil, decreased fertility, strengthened pesticides, polluted air and water
During science class the teacher mixed a soap solution with white liquid glue. While she was
mixing the substances, the cup began to get warm. After mixing them, the resulting substance
became thick, squishy, and stretchy. Juan says this is an example of a chemical change
Answer:
that is true
Explanation:
the chemical changed reaction
11.
Which statement are TRUE about protons.
a they have a positive charge
b they have a mass over 1800 times greater
than the mass of an electron
they were the first subatomic particles to be
С
discovered
d they repel electrons
Answer:
hoping this is a 2 mark answer a,b
Explanation:
electrons were the first subatomic particle to be discovered
protons + proton = repel
proton + electron = attract
can guys help me to answer it
Answer:
14) balanced
15) Unbalanced
I hope it helps.
What is the mass in grams of 10.76 mL of acetone?
When it has a density of .7857g/cm^3
If a body is buried, the process of complete _____ can take up to two years to complete.
1. adipocere
2. mummification
3. skeletonization
4. putrefaction
Answer: 2
Explanation:
Sodium is an alkali metal that reacts violently with water. Calculate the total number of atoms in a 58.2 grams sample of sodium and express in correct scientific notation.
In 58.2 grams of Na there is 1.51 x 10^24 atoms.
Mole calculation
To calculate the amount of atoms present in a mass sample, it is necessary to have knowledge of the molar mass of the element and Avogadro's constant, used in such a way that:
[tex]MM_Na= 23g/mol[/tex]
[tex]C = 6\times 10^{23}[/tex]
[tex]MM = \frac{m}{mol}[/tex]
[tex]23 = \frac{58.2}{x} = > 2.53 atoms[/tex]
Now, with the value of the number of moles, just calculate the number of atoms present, so that:
[tex]atoms = mol \times C[/tex]
[tex]atoms = 2.53 \times 6 \times 10^{23}[/tex]
[tex]atoms = 1.51 \times 10^{24}[/tex]
So, in 58.2 grams of Na there is 1.51 x 10^24 atoms.
Learn more about mole calculation in: brainly.com/question/2845237
Nitrogen moves continuously between the atmosphere and soil in what is called the ______.
nitrification
weathering
nitrogen cycle
photosynthesis
Explanation:
weathering is correct answer thanks
Answer:
Your answer would be:
C.) Nitrogen Cycle
Nitrogen moves continuously between the atmosphere and soil in what is called the nitrogen cycle.
Explanation:
The nitrogen cycle is the biogeochemical cycle describing how nitrogen moves through the biosphere and atmosphere. The nitrogen cycle is a lot like the carbon and water cycle. Rainstorms contribute atmospheric nitrogen through raindrops that reach the soil. Plants, such as soybeans, alfalfa, and clovers, are plants that can convert atmospheric nitrogen into plant-usable nitrogen.
Have a great rest of your day
#TheWizzer
What is the difference between physical and chemical properties of matter
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
HOPE THIS HELPS!!!
Which of the following layers of the atmosphere has the coldest temperatures?
A. Thermosphere
B. Mesosphere
C. Exosphere
D. Stratosphere
Answer:
mesosphere
Explanation:
The coldest layer of the atmosphere is known as the mesosphere.
The layers of the atmosphere have the coldest temperatures is mesosphere. Therefore, option B is correct.
What is mesosphere ?The third layer of the atmosphere, the mesosphere, is situated just above the stratosphere and under the thermosphere. As altitude rises, temperature drops in the mesosphere.
The third of the five layers that make up the Earth's atmosphere, the mesosphere, is located between the thermosphere and the stratosphere.
It is distinguished by a temperature that drops with altitude, becoming the coldest region of the entire atmosphere at a minimum of around 55 miles above the surface.
The coldest part of the Earth's atmosphere is the top of the mesosphere, where temperatures can locally drop as low as 100 K (-173°C).
Thus, option B is correct.
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PLEASE HELP ASAPPPPPPP!!!!!
Answer:LOL ITS PHYSICAL PROPERTIES
Explanation:IT IS TRUST ME
It base please you guys
Answer:
Do You Need Help With Anything...??
How many equivalents of acid are in an acid sample that requires 23.67 mL of 0.1467 N
NaOH solution to reach the endpoint?
What is the meaning of bezene
Answer:
Benzene is an organic chemical compound with the molecular formula C₆H₆. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, benzene is classed as a hydrocarbon.
Given the balanced equation with an unknown compound represented by X:
Which compound is represented by x ?
Answer:
CH3CH2OH
Explanation:
The reactant has:
- 6 carbon atoms
- 12 hydrogen atoms
- 6 oxygen atoms
The second product has:
- 4 oxygen atoms
- 2 carbon atoms
In 2CH3CH2OH there are:
- 4 carbon atoms
- 12 hydrogen atoms
- 2 oxygen atoms
If you combine the number of atoms of each chemical species of both 2CH3CH2OH and the second product, you will see that you get the same number of atoms of each chemical species in the reactant:
carbon = 2 + 4 = 6 (number of carbon atoms in reactant)
oxygen = 4 + 2 = 6 (number of oxygen atoms in reactant)
hydrogen = 0 + 12 = 12 (number of hydrogen atoms in reactant)
This means that no atoms were created or destroyed which is true for all equations. If this was done with one of the other compounds listed, atoms would have been created or destroyed which cannot happen. In all equations, atoms are never created or destroyed, however they do rearrange to form new products.
it is often thought that two mutations must happen in a cell to create a cancerous cell. What two cell functions could mutate and lead to a cancerous cell?
Answer:
Tumor Suppressor genes,
and proto oncogenes.
Explanation:
can mutate and lead to a cancerous cell.
All the objects in the force diagrams shown below have the same mass.
Which of the force diagrams would result in the greatest change in speed?
I need help asap
Answer:
do u know what the answer is yet
Explanation:
_Na +_Cl2 → __Naci
How many moles of NaCl are created from 1.5moles Na?
Explanation:
Balancing the equation, we get that:
2Na + Cl2 -> 2NaCl
So from 1.5 moles of Na, 1.5(2/2)=1.5 moles of NaCl are produced.
(c) A student is given three metals, X, Y and Z to identify. The metals are magnesium, iron and copper. Plan an investigation to identify the three metals by comparing their reactions with dilute hydrochloric acid. Your plan should give valid results.
4 MARKS QUESTION
Magnesium reacts quickly with HCl while iron reacts more slowly with HCl. Copper does not react at all with HCl.
Rates of reactivity of metals?We have to recall that the reactivity of metals is determined by the position of the metal in the electrochemical series. This is an arrangement of metals from more reactive to least reactive.
Magnesium and iron reactwith dilute HCl to give hydrogen gas but the rates of reaction differ. Magnesium reacts fastest with HCl followed by iron but copper does not react with HCl at all.
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How does this number compare to what you predicted at the beginning of this lab genetics?
Answer:
Scientists estimate that the human genome, for example, has about 20,000 to 25,000 protein-coding genes. ... In fact, compared to almost any other organism, humans' 25,000 protein-coding genes do not seem like many. The fruit fly Drosophila melanogaster, for example, has an estimated 13,000 protein-coding genes.
Explanation:
I hope this helps!Using the initial concentration and volume values from Trial 1 of Table 1, fill in the following chart of new concentration values (in Molarity) for the following reactants: [BrO3-], [I-], [H+].
Based on the given concentration and volume of solutions, the molarity of the ions are as follows:
Molarity of [BrO3-] = 0.02 MMolarity of [I-] = = 0.0033 MMolarity of [H+] = 0.05 MWhat is molarity of a solution?The molarity of a solution is the number of moles of the substance in a given volume of solution in litres.
Molarity = moles/volume in LMoles of [BrO3-] = 0.04M × 0.005 L = 0.0002 moles
Moles of [I-] = 0.01 M × 0.005 L = 0.00005 moles
Moles of [H+] = 0.1 M × 0.005 L = 0.0005 moles
Flask A:
total volume = 15 mL = 0.015 L
Molarity of [I-] = 0.00005/0.015
Molarity of [I-] = = 0.0033 M
Flask B:
Total volume = 10 mL = 0.01 L
Molarity of [BrO3-] = 0.0002/0.01
Molarity of [BrO3-] = 0.02 M
Molarity of [H+] = 0.0005/0.01
Molarity of [H+] = 0.05 M
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Sulfur dioxide and nitrogen dioxide react at 298 K via the reaction
SO2(g)+NO2(g)⇌SO3(g)+NO(g)
A system at equilibrium contains 0.369 mol SO2 , 0.369 mol NO2 , 0.654 mol SO3 , and 0.718 mol NO. O2 is added to the container and NO reacts completely with the O2. Calculate the amount of SO3 in the container after the system returns to equilibrium.
O₂ reacts increasing the NO₂ to 0.718 moles. At the return to equilibrium,
the amount SO₃ in the container approximately 0.931 moles.
How can the equilibrium values indicate the amount of SO₃?The equilibrium constant for the reaction aA + bB ⇌ cC + dD is presented as follows;
[tex]K_c = \mathbf{\dfrac{[C]^c_{eq} +[D]^d_{eq} }{[A]^a_{eq} +[B]^b_{eq} }}[/tex]
The equilibrium constant for the reaction, whereby the volume is same for the contents is therefore;
[tex]K = \dfrac{0.654 \times 0.718}{0.369 \times 0.369} \approx 3.45[/tex]
Given that the NO reacts with the O₂ as follows;
2NO + O₂ [tex]\longrightarrow[/tex] 2NO₂
We have;
The number of moles of NO₂ added = 0.718 moles
The new number of moles are therefore;
[tex]K = \mathbf{ \dfrac{(0.654 + x) \times (0+ x)}{(0.369-x) \times (0.369 + 0.718-x)}} \approx 3.45[/tex]Which gives;
0 = (0.654 + x) × x - 3.45 × (0.369 × (0.369 + 0.718)
2.45·x² - 5.6772·x + 1.384 = 0
[tex]x = \dfrac{5.6772 \pm \sqrt{(-5.6772)^2 - 4 \times 2.45 \times (1.3834)} }{2\times 2.45}[/tex]
x ≈ 0.2768 or x ≈ 2.04
The possible number of moles of SO₃ in the container after equilibrium is reestablished is therefore;
n ≈ 0.654 + 0.2768 ≈ 0.931
The number of moles of SO₃ in the container after returning to equilibrium is 0.931 molesLearn more about equilibrium constant here:
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2. What is the volume of 40.0 g of N2 at STP?
Answer:
Molar mass of
N
2
=
28 g/mol
Moles of
40.5 g N
2
gas
=
40.5 g
28 g/mol
=
1.45 mol
1 mol
of any gas at
STP
occupies
22.4 L
of volume.
1.45 mol
of
N
2
gas will occupy
1.45
mol
×
22.4 L
1
mol
=
32.48 L
