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
andrey2020 [161]
3 years ago
11

Question 7

Chemistry
1 answer:
Paladinen [302]3 years ago
8 0

Answer:

2HCI + Na2S - > H2S + 2NaCl

Explanation:

2HCI + Na2S -> H2S + 2NaCl

before reaction: 2H, 2Cl, 2Na, 1S

after reaction: 2H, 2Cl, 2Na, 1S

You might be interested in
Part B When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 22.8 g of carbon were burned in the pres
aksik [14]

<u>Answer:</u> The amount of carbon dioxide gas produced in the reaction is 83.6 grams

<u>Explanation:</u>

As, some amount of oxygen gas is left after the reaction is completed. So, it is present in excess and is considered as an excess reagent.

Thus, carbon is considered as a limiting reagent because it limits the formation of product.

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}     .....(1)

Given mass of carbon = 22.8 g

Molar mass of carbon = 12 g/mol

Putting values in equation 1, we get:

\text{Moles of carbon}=\frac{22.8g}{12g/mol}=1.9mol

The chemical equation for the reaction of carbon and oxygen gas follows:

C+O_2\rightarrow CO_2

By Stoichiometry of the reaction:

1 mole of carbon produces 1 mole of carbon dioxide gas

So, 1.9 moles of carbon will produce = \frac{1}{1}\times 1.9=1.9moles of carbon dioxide gas

Now, calculating the mass of carbon dioxide from equation 1, we get:

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = 1.9 moles

Putting values in equation 1, we get:

1.9mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=(1.9mol\times 44g/mol)=83.6g

Hence, the amount of carbon dioxide gas produced in the reaction is 83.6 grams

6 0
3 years ago
Why is it hotter in the summer and colder in the winter?
chubhunter [2.5K]

Answer: During the summer, the sun's rays hit the Earth at a steep angle. ... Also, the long daylight hours allow the Earth plenty of time to reach warm temperatures. During the winter, the sun's rays hit the Earth at a shallow angle. These rays are more spread out, which minimizes the amount of energy that hits any given spot.

8 0
2 years ago
Read 2 more answers
Which of these metals reacts more vigorously with water? <br><br> 1. Zinc <br> 2. Magnesium
GalinKa [24]

Answer:

magnesium  

Explanation:

because zinc does not react with water because it too forms a protective layer of insoluble.

8 0
2 years ago
PLEASE HELP!!! I will mark brainliest I am really struggling with these problems
Ket [755]

Answer:

21883.75 Joules are required to melt the ice!

5 0
3 years ago
HELP MEE please with this question this question is 100pts and i will give branliest i only have 5 min left guys thanx:) Which s
LenaWriter [7]

Answer:

The cell grows into its full size

The cell copies it’s dna

Explanation:

hope this helps pls mark brainliest

8 0
2 years ago
Other questions:
  • What is the percentage of magnesium sulfate in MgSO4 x 7H2O.
    7·1 answer
  • Which statement describes a physical property of copper?
    13·2 answers
  • Determine the volume at STP of 36.8 g of nitrogen dioxide (NO2)
    6·1 answer
  • ) The only noble gas without eight valence electrons is __________. A) Ar B) Ne C) Kr D) He E) All noble gases have eight valenc
    13·1 answer
  • How are the three beams on a triple beam balance different
    7·1 answer
  • An environmental scientist performs research to discover what is in the solid garbage of the average American family. She calcul
    9·1 answer
  • How many moles of nitrogen gas would be produced if 3.27 moles of copper(II) oxide were reacted with excess ammonia in the follo
    10·1 answer
  • Which statement describes why the viscosity of water is lower than that of
    13·2 answers
  • The subatomic particle that is different in isotopes
    7·1 answer
  • Can you help me on this stuff
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!