Answer:23.4
Explanation:
What happens when samples of matter interact?
Answer: matter and its interaction with energy. Matter has mass and occupies space. A Substance is matter that cannot be separated into other kinds of matter by physical means.
Explanation:
NEED QUICK
According to the Periodic Table, the properties of calcium are most like.
1. manganese
2. magnesium
Answer: 2. magnesium
Explanation: correct spelling...?
What did Darwin think about Earth and life while he was forming his theory of evolution?
Answer:Charles Darwin was a British naturalist who proposed the theory of biological evolution by natural selection. Darwin defined evolution as "descent with modification," the idea that species change over time, give rise to new species, and share a common ancestor.
Explanation:
The _____shows you how many molecules are present in the reaction.
Answer:
number of atoms
i think sorry if this isnt right x
Explanation:
Write a balanced equation for copper metal and aqueous sulfuric acid react to form a solid copper (II) sulfate, liquid water, and sulfur dioxide solid.
Answer:
Cu (s) + 2H₂SO₄(aq) —> CuSO₄(s) + 2H₂O (l) + SO₂(s)
Explanation:
Copper metal => Cu
Sulphuric acid => H₂SO₄
copper (II) sulfate => CuSO₄
Water => H₂O
sulfur dioxide => SO₂
The equation for the reaction between copper metal and aqueous sulfuric acid can be written as follow:
Cu + H₂SO₄ —> CuSO₄ + H₂O + SO₂
The above equation can be balance as follow:
Cu + H₂SO₄ —> CuSO₄ + H₂O + SO₂
There are 2 atoms of S on the right side and 1 atom on the left side. It can be balance by writing 2 before H₂SO₄ as shown below:
Cu + 2H₂SO₄ —> CuSO₄ + H₂O + SO₂
There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 2 before H₂O as shown below:
Cu + 2H₂SO₄ —> CuSO₄ + 2H₂O + SO₂
Thus, the equation is balanced.
Include the phase of each reactant and product, we have:
Cu (s) + 2H₂SO₄(aq) —> CuSO₄(s) + 2H₂O (l) + SO₂(s)
many fish, insect, and including the common housefly, produce large amounts of glycerol (C³H³O³) in cold areas to lower the freezing point of their blood. what percent of oxygen is percent in glycerol
A. 52.11% B. 51.11%
C. 53.11% D. 50.11%
Answer:
A. 52.11%
Explanation:
Percentage of Oxygen= (mass of Oxygen in glycerol/ mass of glycerol) x 100
= ((16*3)/ 92.11) x 100
=52.11%
A box with a volume of 44.8 L contains 5.0 mol of hydrogen at 500K.
Calculate the pressure of the gas in mmHg.
R = 62.4 mmHg L/mol K
Answer:
3.5 × 10³ mmHg
Explanation:
Step 1: Given data
Volume of the box (V): 44.8 LMoles of hydrogen gas (n): 5.0 molAbsolute temperature (T): 500 KIdeal gas constant (R): 62.4 mmHg.L/mol.KStep 2: Calculate the pressure (P) of the gas
If we assume an ideal behavior, we can calculate the pressure of the hydrogen gas using the ideal gas equation.
P × V = n × R × T
P = n × R × T/V
P = 5.0 mol × (62.4 mmHg.L/mol.K) × 500 KT/44.8 L = 3.5 × 10³ mmHg
In which environment is erosion likely to have the most impact?
a steep hillside with little vegetation and strong downpours
a steep hillside covered with grasses and mild downpours
a flat valley with little vegetation and heavy downpours
a flat valley covered with grasses and mild downpours
Answer:
A. Steep hillside, little vegetation, strong downpours
Explanation:
between a steep hill and a flat valley, the hill is more likely to be affected because of gravity. with a valley theres less places for the dirt to actually move to. So C and D are not correct
a lack of vegetation and heavy downpour is the perfect condition for erosion. plants' root system makes dirt and rock more stable. without a lot of roots to hold the dirt in place and absorb water before it runs over the rocks and breaks them down, heavy rain would be a lot more likely to erode the area. so B isnt right either
In the reaction 2Na3N-6Na+N, how many moles of Na are produced when 6 mol of Na3N
decompose?
moles of Na produced = 6 moles
Further explanationGiven
Reaction
2Na3N---> 6Na+N
6 moles of Na3N
Required
moles of Na
Solution
I don't really understand the reaction in the problem, all I know is the decomposition reaction of sodium azide NaN3
2NaN₃ → 2Na + 3N₂
The reaction coefficient shows the mole ratio of the compounds involved in the reaction
From the equation(balanced), mol ratio of Na : NaN₃ = 2 : 2, so mol Na :
= 2/2 x moles NaN₃
= 2/2 x 6 moles
= 6 moles
Sorry if it’s not a good pic but...What’s the answer?!?
Answer:
If the products contain 3 nitrogen atoms, then so did the reactants since overall mass is conserved in a chemical reaction.
Explanation:
so the answer is A
How many grams of water could be made from 5.0 mol H2 with excess O2? 2 H2 + O2 --> 2 H2O
Answer:
Explanation:
5 moles of hydrogen gas would react with 2.5 of the available 3 moles of oxygen gas, to form 5 moles of water. The molar mass of water is 18 g/mol, so you would end up with 5 x 18 = 90 g of water.
The mass percent of hydrogen in CH₄O is 12.5%.
What is the mass percent?Mass percent is the mass of the element divided by the mass of the compound or solute.
Step 1: Calculate the mass of the compound.
mCH₄O = 1 mC + 4 mH + 1 mO = 1 (12.01 amu) + 4 (1.00 amu) + 1 (16.00 amu) = 32.01 amu
Step 2: Calculate the mass of hydrogen in the compound.
mH in mCH₄O = 4 mH = 4 (1.00 amu) = 4.00 amu
Step 3: Calculate the mass percent of hydrogen in the compound.
%H = (mH in mCH₄O / mCH₄O) × 100%
%H = 4.00 amu / 32.01 amu × 100% = 12.5%
The mass percent of hydrogen in CH₄O is 12.5%.
CO2 = 1.580 grams H2O = 0.592 grams Lookup the molar mass of each element in the compound Carbon = 12.0107 Hydrogen = 1.00794 Oxygen = 15.999 Calculate the molar mass of CH4O by adding the total masses of each element used. 12.0107 + 4 * 1.00794 + 15.999 = 32.04146 Now calculate how many moles of CH4O you have by dividing by the molar mass. m = 1.15 g / 32.04146 g/mole = 0.035891 mole Now figure out how many moles of carbon and hydrogen you have. Carbon = 0.035891 moles Hydrogen = 0.035891 moles *
Therefore, The mass percent of hydrogen in CH₄O is 12.5%.
Learn more about mass percent here:
https://brainly.com/question/5295222
#SPJ6
please help i’ll give you brainlest
Answer:
2.6 L
Explanation:
[tex]\frac{0.87L N_{2} }{22.4L} * \frac{3 H_{2}}{1 N_{2}} *22.4L=2.6L[/tex]
Answer:
2.6 liters
Explanation:
my testes
Write the following formulas in words:
a. НСІ
b. Naci
HCL:hydrochloric acid
Nacl:sodium chloride
Calculate the mass of iron (iii) oxide that contains a trillion iron atoms
Answer:
Calculate the mass of iron(III) oxide (Fe20) that contains a trillion (1.000x 10") oxygen atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. A chemist measures the amount of oxygen gas produced during an experiment. He finds that 9.2 g of oxygen gas is produced.
Explanation:
Which set of coefficients will balance this chemical equation?
C2H4(g) + _O2(g) → 2C02(g) + 2H2O(g)
Answer:The answer is D.1,3
Explanation:
Please help! Very important and will give brainliest to correct answer!
Two gas jars are connected to each other, but they are separated by a closed valve. One gas jar contains oxygen, and the other is empty. What will happen when the valve is opened?
Select one:
a. Oxygen molecules will remain in their original jar because of the very high density of the oxygen molecules.
b. Oxygen molecules will remain in their original jar because there is enough space in the original jar.
c. Oxygen molecules will spread evenly throughout both jars because of weak intermolecular forces.
d. Oxygen molecules will spread through both jars because of the high molecular weight of oxygen.
Answer:
c
Explanation:
they are a gas
Answer:
c. Oxygen molecules will spread evenly throughout both jars because of weak intermolecular forces.
Explanation:
Gases mold to take shape and fill the containers they're in.
Hope this helps :)
why algal blooms happen some years but not others
Answer:
READ MORE about the factors that cause algal blooms... Nutrients promote and support the growth of algae and Cyanobacteria. The eutrophication (nutrient enrichment) of waterways is considered as a major factor. The main nutrients contributing to eutrophication are phosphorus and nitrogen.
Preview the following chart and identify the text structure used to summarize:
Cow is infected from feed
Cow dies
Cow becomes feed for other cows
Other cows become infected from eating BSE in feed
a.
sequencing
c.
problem/solution
b.
cause/effect
d.
fact/opinion
Answer:
A or B, but I think B would be the safer option.
Explanation:
In an ecosystem, the following chart of cows depicts cause or effect of the text structure.
What is an ecosystem?An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other by means of nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the ecosystem .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different types of ecosystems present.
Learn more about ecosystem,here:
https://brainly.com/question/13979184
#SPJ2
For the balanced equation 2C6H6OS+1102=12CO+6H2O+2SO3 how many moles of C6H6OS reacted if 0.474 moles of SO3 are produced?
Answer:
0.474 moles of C₆H₆OS
Explanation:
Step 1: Write the balanced equation
2 C₆H₆OS + 11 O₂ ⇒ 12 CO + 6 H₂O + 2 SO₃
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of C₆H₆OS to SO₃ is 2:2.
Step 3: Calculate the moles of C₆H₆OS reacted if 0.474 moles of SO₃ are produced
We will use the previously established molar ratio.
0.474 mol SO₃ × 2 mol C₆H₆OS/2 mol SO₃ = 0.474 mol C₆H₆OS
True or false. The particulates left from combustion have the same mass as the substance that was burned. Giving Brainliest!
The study of chemicals is called chemistry.
The correct answer is true.
What is combustion?The process of burning anything in the presence of oxygen is called combustion.According to the question, the statement is right because the solid amount is converted into the gas after burning but the mass remains constant.
law of conservation of massit states that the mass of the element remains constant before and after the reaction.Hence, the correct answer is true.
For more information about the question, refer to the link:-
https://brainly.com/question/1255220
What mass of KCl is required to make a 0.680 m solution with 5.00 kg of water? a) 199 g b) 548 g c) 253 g d) 373 g
Answer:
it is A.
Explanation:
A.) 199g
How many moles are there in 100 grams of carbon dioxide?
Answer:
there are 8.3259093974539 moles in 100 grams of carbon dioxide
The number of moles that are in 100 grams of carbon dioxide is 2.272 g/mol. Moles can be calculated by dividing the mass by the molar mass of the compound.
What are moles?"The mole is a SI unit of measurement that is used to calculate the quantity of any substance."
The molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound. Mass is the quantity of matter of a physical body. The product of the molar mass of the compound and the moles of the substance are defined as mass.
Moles = mass / molar mass
The mass of carbon dioxide is 100 grams
The molar mass of carbon dioxide is 44.01 g/mol
Put the values in the formula of moles:
100 / 44.01 = 2.272 g/mol
Therefore, there are 2.272 g/mol of moles in 100 grams of carbon dioxide.
To learn more about moles, refer to the link:
https://brainly.com/question/26416088
#SPJ6
What occurs when a molecule combines with Oxygen and produces heat?
A. It dissolves
B. It precipitates
C. It Evaporates
D. it combusts
Answer:
D. it combustsExplanation:
Combustion is when fuel reacts with oxygen to release heat energy. Combustion can be slow or fast depending on the amount of oxygen available. Combustion that results in a flame is very fast and is called burning. Combustion can only occur between gases.
1. Write the equilibrium constant expression for the following:
CS2(g) + 4 H2(g) ⇌ CH4(g) + 2 H2S(g) Kp =
2. Calculate the value of Kp for the above reaction if the equilibrium pressures for each of the
components are as follows:
ௌమ = 0.500 , ுమ = 0.100 , ுర = 1.00 , ுమௌ = 0.800
3. Given the above equilibrium reaction, predict in which direction the equilibrium will shift if the
pressure of the vessel is decreased. Explain in 2-3 sentences why
4. If the Kp of your reaction = 0.00274, calculate what Kc should be using the equation Kp = Kc(RT)Δn
5. For the reaction: A2(g) + B(g) ⇌ 2C(g) it is found that by adding 1.5 moles of C to a 1.0 L
container, an equilibrium is established in which 0.30 moles of B are produced.
a) What is [A] at equilibrium?
b) What is [B] at equilibrium?
c) What is [C] at equilibrium?
d) Write the expression for the equilibrium constant, Keq
e) Calculate the value for the equilibrium constant
6. Consider the reaction 2NO2(g) ⇌ N2O4(g) to be at equilibrium with
[NO2(g)] = 1.60 M, [N2O4] = 0.20 M, and Kc = 0.078.
1. Predict qualitatively what will happen to this reaction if more NO2 is added so that
[NO2(g)] = 2.00 M?
2. Predict qualitatively what will happen to this reaction if instead NO2 is removed so that
[NO2(g)] = 1.00 M?
7. Calculate the values for Qc for these two experiments.
(a) [NO2(g)] = 2.00 M and [N2O4] = 0.20 M: Qc =
(b) [NO2(g)] = 1.00 M and [N2O4] = 0.20 M: Qc =
8. What in general happens to a reaction if
(a) Qc Kc
9. A mixture of H2 and I2 is allowed to react at 448°C. When equilibrium is established, the
concentrations of the participants are found to be:
[H2] = 0.46 M, [I2] = 0.39 M and [HI] = 3.0 M.
The equation is: H2(g) + I2(g) ⇌ 2HI(g)
Calculate the value of Keq at 448°C.
10. CO(g) + H2O(g) ⇌ CO2(g) + H2(g)
At 900 K, Kc = 1.56 for this reaction. A sample of water gas flowing over coal at 900 K contains a
1:1 mole ratio of CO(g) and H2(g), as well as 0.250 mol L–1 H2O(g). This sample is placed in a
sealed container at 900 K and allowed to come to equilibrium, at which
point it contains 0.070 mol L–1 CO2(g). What was the initial concentration of CO(g) and H2(g) in
the sample?
11. At 700 °C, hydrogen and iodine react according to the following equation.
H2(g) + I2(g) ⇌ 2HI(g) Kc = 49.0
Hydrogen also reacts with sulfur at 700 °C:
2H2(g) + S2(g) ⇌ 2H2S(g) Kc = 1.075 × 108
Calculate Kc for the following overall equilibrium reaction at 700 °C.
2I2(g) + 2H2S(g) ⇌ S2(g) + 4HI(g) Kc = ?
12. The KC for the reaction: PCl5(g) ⇌ PCl3(g) + Cl2(g) at 250°C is found to be 0.042. In an equilibrium
mixture of these species, it is found that [PCl5] = 0.012 M, and [Cl2] = 0.049 M. What is the
equilibrium [PCl3] at 250 °C?
13. At a certain temperature, the reaction: CO(g) + 2H2(g) ⇌ CH3OH(g) has a Keq = 0.500. If a reaction
mixture at equilibrium contains 0.210 M CO and 0.100 M H2, what is the equilibrium [CH3OH]?
14. Given the equilibrium equation: H2(g) + I2(g) ⇌ 2HI(g) at 448°C, Keq = 50.
If 3.0 mol of HI, 2.0 mol of H2, and 1.5 mol of I2 are placed in a 1.0 L container at 448°C, in which
direction will the reaction go? Towards the left or towards the right?
15. Given the equilibrium equation: H2(g) + I2(g) ⇌ 2HI(g) at 448°C, Keq = 50. If 5.0 mol of HI, 0.7071
mol of H2, and 0.7071 mol of I2 are placed in a 1.0 L container at 448°C, will a reaction occur?
16. Given the reaction: 4HCl(g) + O2(g) ⇌ 2H2O(g) + 2Cl2(g) ΔH = -113 kJ
How will the value of the equilibrium constant Keq at 550 oC compare with its value at 450 oC?
17. Using the principles postulated by Le Châtelier, predict which direction (left, right, or no change)
the given reaction will go if the following occurs:
4 NH3(g) + 5 O2(g) ⇌ 4 NO(g) + 6 H2O(g) ΔHrxn = -905.5 kJ/mole
a. Nitrogen monoxide is added to the vessel:
b. The pressure in the vessel is increased:
c. The reaction is cooled:
d. Carbon dioxide gas is pumped into the reaction vessel:
Answer:
c
Explanation:
it could honestly be wrong but I'm not sure
What is the molar mass of a compound compared to an element?
Answer: The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).
Explanation: The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.
The mass number of an atom is determined by ___.
1.adding the protons and electrons
2.adding the protons and neutrons
3.adding the electrons and neutrons
4. adding the protons,electrons and neutrons
Consider a car being acted on by balanced forces. Can you conclude whether the car is moving or at rest? Explain your response.
Since the car is being acted upon by balanced forces, the car is at rest. as the forces are being balanced.
What is a force?
Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
Learn more about force,here:
https://brainly.com/question/28875770
#SPJ6
What is the element in period 3 that required requires the least amount of energy?
How many moles are present in 63.80L of oxygen gas, O2?
Answer:
2.85moles of oxygen gas
Explanation:
Given parameters:
Volume of oxygen gas = 63.8L
Unknown:
Number of moles = ?
Solution:
We assume that the gas is under standard temperature and pressure. To find the number of moles, use the expression below:
1 mole of a gas at STP occupies a volume of 22.4L
So;
63.8L of oxygen gas will take up a volume of
[tex]\frac{63.8}{22.4}[/tex] = 2.85moles of oxygen gas
describe how plants might be affected if the inter molecular forces in water decreased? i need asap!
Answer:
Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond. Since water has hydrogen bonds, it also has dipole-induced dipole and London dispersion forces.
Hope it helped!!