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melomori [17]
4 years ago
9

A saline solution contains 1.6 % NaCl by mass.How much NaCl is present in 57.2 g of this solution?

Chemistry
1 answer:
nekit [7.7K]4 years ago
6 0

Answer:

0.92 g

Explanation:

Given data:

Percentage of NaCl = 1.6%

Amount of NaCl present in 57.2 g = ?

Solution:

1.6% of 57.2 g NaCl:

1.6/100× 57.2 g

0.92 g

So in 57.2 g 1.6% of NaCl is 0.92 g.

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Deffense [45]

nuclear fusion

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5 0
2 years ago
How many grams of oxygen are required to react with 10.0 grams of octane (C8H18) in the combustion of octane in gasoline?
mel-nik [20]
Oh fun, stoichiometry. So the equation for this is C8H18+O2----> CO2+H2O, or
2C8H18+25O2----> 16CO2+18H2O when balanced. 10/114.229 g/mol = .087543... mol, converting to moles by dividing by molar mass. The ratio is 25/2, using the integers in front of the molecules in the balanced equation. so you just multiply .087543... by the ratio. That's 1.09429, which you multiply by the molar mass of O2, 31.9988 g/mol. The answer is 35.02 g O2
6 0
3 years ago
Read 2 more answers
The combustion of propane C,H, produces carbon dioxide and steam.
Julli [10]

Answer:

23 moles

Explanation:

Given data:

number of moles of propane = 7.5 mol

Number of moles of carbon dioxide produced = ?

Solution:

Chemical equation:

C₃H₈ + 5O₂     →      3CO₂ + 4H₂O

Now we will compare the moles of propane and carbon dioxide.

                        C₃H₈             :             CO₂

                             1                :               3

                           7.5              :           3/1×7.5 = 22.5

22.5≅ 23 moles

7 0
3 years ago
Hunter is copying an angle. His work so far follows. Explain the importance of his next step. Which is drawing A-line through A
forsale [732]

Answer:

its c ma man .

This is the other ray that will make up the angle ∠AYZ and will complete the constructioExplanation:

if your taking the quick check these were my awnsers

1.c

2.b

3.d

4.c

5 .A

for the copying an angle quick check only

6 0
3 years ago
Which level is made up of organisms that break down dead organisms?
mario62 [17]

Answer:

Explanation:

decomposers

4 0
4 years ago
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