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iragen [17]
3 years ago
6

What is the solution to the problem expressed to the correct number of significant figures?

Chemistry
1 answer:
Lena [83]3 years ago
3 0

Answer:

B

Explanation:

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For the reaction
azamat

Answer:

Mass = 5.56 g

Explanation:

Given data:

Mass of Cl₂ = 4.45 g

Mass of NaCl produced = ?

Solution:

Chemical equation:

2Cl₂ + 4NaOH     →   3NaCl + NaClO₂ + 2H₂O

Number of moles of Cl₂:

Number of moles = mass/molar mass

Number of moles = 4.45 g/ 71 g/mol

Number of moles = 0.063 mol

Now we will compare the moles of Cl₂ with NaCl.

                  Cl₂         :         NaCl

                    2          :          3

                 0.063      :        3/2×0.063 =0.095 mol

Mass of NaCl:

Mass = number of moles × molar mass

Mass = 0.095 mol × 58.5 g/mol

Mass = 5.56 g

7 0
2 years ago
What do the coefficients in the following balanced chemical equation mean?
mafiozo [28]
It's either B or D because there would be 2 coefficients of hydrogen and one of oxygen
6 0
3 years ago
Which of the following measurements is expressed to three significant figures?
matrenka [14]

The answer is C. 7.30 x 10^-7

8 0
3 years ago
Pls help I don’t understand: Which of these is a balanced chemical reaction?
nata0808 [166]

Answer:

C) 2CO + O₂ →   2CO₂

Explanation:

The equation C is correct.

2CO + O₂ →   2CO₂

This equation have four oxygen atom and two carbon atoms on both side of equation. So it is correctly balanced.

All others are incorrect:

A) CO + O₂ →   CO₂

this is incorrect because there are three oxygen atoms on left while two atoms on right.

B) CO + 2O₂ →   2CO₂

this is incorrect because there are five oxygen atoms on left while four atoms on right.

D)  2CO + 2O₂ →   2CO₂

this is incorrect because there are six oxygen atoms on left while four atoms on right.

3 0
3 years ago
What is the total number of years that must pass before only 25.00 grams of an original 100.0-gram sample of C-14 remains unchan
Karolina [17]
The answer is (3) 11,460 y. For this problem, you must know that the half life of C-14 is 5740 y and that nuclear decay processes are first order reactions (which means that the half life remains constant). For 25.00g to be left of a 100.0g sample, two half life must have elapsed (100*0.5*0.5=25). Each half life is 5730 y, so the total time elapsed is 5730 * 2 = 11,460 y.
8 0
3 years ago
Read 2 more answers
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