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
Goshia [24]
3 years ago
12

The chemical equation below shows the combustion of methane (CH4).

Chemistry
2 answers:
Vikki [24]3 years ago
8 0

Answer:

B. 6.15

Explanation:

pishuonlain [190]3 years ago
3 0
According to the chemical equation, the reaction ratio between O2 and CO2 is 2:1, which mean for every 2 moles of O2 reacted there is 1 mole of CO2 formed. 

Use the molar mass and mass of O2 to find out the moles of O2: moles of O2 = mass of O2/molar mass of O2 = 8.94g/32.00g/mol = 0.2794 mole.  Therefore, the moles of CO2 that formed is 0.2794moles/2 = 0.1397 mole

Use the moles and molar mass CO2 to find out the mass of CO2:
Mass of CO2 = moles of CO2 * molar mass of CO2 = 0.1397 mole * .44.01g/mole = 6.15 g.

So the answer is B 6.15g.
You might be interested in
Help me with this question please !!<br> A<br> B <br> C<br> D
RUDIKE [14]

Answer:

c becuase I'm not to good at this but I'm pretty sure

Explanation:

I think

7 0
2 years ago
How many atoms are in a sample of 72.8 g calcium (Ca)?
xxMikexx [17]
Atomic mass Ca = 40.078 a.m.u

40.078 g -------------------- 6.02x10²³ atoms
72.8 g ---------------------- ??

72.8 x ( 6.02x10²³) / 40.078 =

4.38x10²⁵ / 40.078 = 1.093x10²⁴ atoms

hope this helps!
5 0
3 years ago
Read 2 more answers
what is an empirical formulaWhat is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)?
Margarita [4]

Answer:

Percentage composition = 14.583%

Explanation:

In chemistry, the emprical formular of a compound is the simplest formular a compound can have. It shows the simplest ratio in which the elements are combined in the compound.

Percentage composition by mass of Nitrogen

Nitrogen = 14g/mol

In one mole of the compound;

Mass of Nitrogen = 1 mol * 14g/mol = 14g

Mass of compound = 1 mol * 96.0 g/mol = 96

Percentage composition of Nitrogen = (Mass of Nitrogen /  Mass of compound) * 100

percentage composition = 14/96   * 100

Percentage composition = 0.14583 * 100

Percentage composition = 14.583%

3 0
3 years ago
34. The line shows the path of the ball.
kiruha [24]
C. Potential to kinetic
6 0
3 years ago
Read 2 more answers
Usually, it is observed that climates in coastal regions are moderate as compared to climates in the interiors of continents. Wh
Stella [2.4K]
<span>Answer: option D) Conditions over the oceans change slowly because water takes more time than land to gain or lose heat.

This is because water has a high heat capacity meaning that, with the same amount of heat, it will change its temperature less than what substances with lower heat capacities do.
</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • The water behind a dam has potential energy that can be converted to kinetic energy to turn a turbine
    12·2 answers
  • What is gentle breeding
    11·1 answer
  • 15. What is the name of Fl-?<br> A)Fluorous ion<br> B)Fluorine<br> C)Fluoride ion<br> D)Fluorine ion
    8·1 answer
  • What is the total number of elements in group 17 that are gases at room temperature and standard pressure?
    14·1 answer
  • A cubic object has a volume of 250 cm. What is its density if its mass is 5 points<br> 257.3 g?
    7·1 answer
  • AlCl3 and NaOH <br> Balanced Equation<br> Total Ionic Equation<br> Net Ionic Equation
    7·1 answer
  • why is often necessary to follow extensive purification procedures in the isolation of organic compounds?​
    13·1 answer
  • Electrons have what charge?
    5·2 answers
  • Please help!! On a timer!! If you can help me with any of the following questions please, I'm lost.
    7·1 answer
  • What is an Atom in ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!