1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Juli2301 [7.4K]
3 years ago
5

Which of the following equations are correctly balanced

Chemistry
1 answer:
IRINA_888 [86]3 years ago
7 0
Ion know yo but good luck
You might be interested in
Given the following reactions 2S (s) + 3O2 (g) → 2SO3 (g) ΔH = -790 kJ S (s) + O2 (g) → SO2 (g) ΔH = -297 kJ the enthalpy of the
Trava [24]

Answer:

-196 kJ

Explanation:

By the Hess' Law, the enthalpy of a global reaction is the sum of the enthalpies of the steps reactions. If the reaction is multiplied by a constant, the value of the enthalpy must be multiplied by the same constant, and if the reaction is inverted, the signal of the enthalpy must be inverted too.

2S(s) + 3O₂(g) → 2SO₃(g)  ΔH = -790 kJ

S(s) + O₂(g) → SO₂(g)         ΔH = -297 kJ (inverted and multiplied by 2)

2S(s) + 3O₂(g) → 2SO₃(g)  ΔH = -790 kJ

2SO₂(g) → 2S(s) + 2O₂(g)   ΔH = +594 kJ

-------------------------------------------------------------

2S(s) + 3O₂(g) + 2SO₂(g) → 2SO₃(g) + 2S(s) + 2O₂(g)

Simplifing the compounds that are in both sides (bolded):

2SO₂(g) + O₂(g) → 2SO₃(g) ΔH = -790 + 594 = -196 kJ

4 0
3 years ago
What is the most abundant gas in the atmosphere is _____. argon oxygen nitrogen hydrogen
Serga [27]
Hey there princesswalkeror4ori,

By far, the most abundant gas in the Earth's atmosphere<span> is </span>nitrogen<span>, which accounts for about 78% of the mass of dry air. </span>Oxygen is<span> the next most abundant gas, present at levels of 20 to 21%. Although humid air seems like it contains a lot of water, the maximum </span>amount of water vapor<span> that air can hold is only about 4%.
</span>
Hope I helped!

Have a great day!

7 0
3 years ago
Read 2 more answers
If the concentration of a KCl solution is 16.0% (m/v), then the mass of KCl in 26.0 mL of solution is ________.
melomori [17]

Answer:

The correct answer is 4.16 grams.

Explanation:

Based on the given information, the concentration of KCl solution is 16 % m/v, which means that 100 ml of the solution will contain 16 grams of KCl.

The molarity of the solution can be determined by using the formula,

M = weight/molecular mass × 1000/Volume

The molecular mass of KCl is 74.6 grams per mole.

M = 16/74.6 × 1000/100

M = 16/74.6

M = 2.14 M

Now the weight of KCl present in the solution of 26 ml will be,

2.14 = Wt./74.6 × 1000 /26

Wt. = 4.16 grams

3 0
2 years ago
The cell of your body need energy to carry out life function. Which of the following body responses is a sign that your cells ne
Shkiper50 [21]
B is my pick that's what I think
8 0
3 years ago
The amount of gravitational force impacts the weight of objects.<br> true or false
ElenaW [278]

Answer:

True

Explanation:

It's how gravity works.

8 0
3 years ago
Other questions:
  • How does the Law of Conservation of Mass relate to changes in physical state? How does it relate to chemical changes?
    15·1 answer
  • Someone pls help me with this before i k word myself
    10·1 answer
  • How much H2 is generated from the electrolysis of 150 grams of H2O
    8·1 answer
  • How many electrons are in the outermost energy shell of a neutral magnesium atom?
    11·1 answer
  • Use Appendix E in the textbook. Which of the following substances can oxidize RuO42−(aq) to RuO4−(aq) under standard conditions?
    7·1 answer
  • The complete combustion of 1.00 kg of coal releases about 3.0 x 10E7 J of energy. The conversion of 1.00 kg of mass into energy
    13·2 answers
  • CFx where x stands for a whole number. Measurements also show that a certain sample of the unknown compound contains 8.5 mol of
    12·1 answer
  • Why does a doctor check your lymph nodes when you are sick?
    8·1 answer
  • What is the chemical formula for Fluorine trisulfide ?
    13·1 answer
  • Please no links and round two decimal places
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!