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Alika [10]
2 years ago
15

URGENT - This is not really specific but I have a chemistry test really soon and I still don't understand how to balance chemica

l equations.. I've watched every video and tried practicing but I just still can't understand. Can someone help, please? 30 points will be given out + a brainliest answer will be picked
Chemistry
1 answer:
UkoKoshka [18]2 years ago
8 0

Answer:

Explanation:

- the key thing to note is that balancing is simply having equal amounts of all the compounds in an equation

1) look at how many there are in each compound i.e. cl2 has 2 and HCl has 1 hydrogen and 1 chlorine

2) balance the reactants with its products

this is done by adding a number in front of a compound

e.g. ch4 + cl2 = ccl4 + hcl

balanced: ch4 + 4cl2 = ccl4 + 4hcl

this is because there isnt equal elements of the compounds

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1 year ago
What is the chemical formula for 8.6 mol of sulfur and 3.42 mol of phosphorus
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The chemical formula for the compound containing 8.6 mol of sulfur and 3.42 mol of phosphorus is P₂S₅

<h3>How do I determine the formula of the compound?</h3>

From the question given above, the following data were obatined:

  • Sulphur (S) = 8.6 moles
  • Phosphorus (P) = 3.42 mole
  • Chemical formula =?

The chemical formula of the compound can be obtained as follow:

Divide by their molar mass

S = 8.6 / 32 = 0.26875

P = 3.42 / 31 = 0.11032

Divide by the smallest

S = 0.26875 / 0.11032 = 2.44

P = 0.11032 / 0.11032 = 1

Multiply by 2 to express in whole number

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Why are there different theories about the effects of global warming? a. There is no data to support global warming. b. Global c
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2 years ago
A piston in a heat engine does 500 joules of work, and 1400 joules of heat are added to the system. Determine the change in inte
san4es73 [151]

Answer : The change in internal energy is, 900 Joules.

Solution : Given,

Heat given to the system = +1400 J

Work done by the system = -500 J

Change in internal energy is equal to the sum of heat energy and work done.

Formula used :

\Delta U=q+w

where,

\Delta U = change in internal energy

q = heat energy

w = work done

As per question, heat is added to the system that means, q is positive and work done by the system that means, w is negative.

Now put all the given values in the above formula, we get

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Therefore, the change in internal energy is 900 J.

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