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andre [41]
2 years ago
8

How much heat energy is required to raise the temperature of 15g of silver from 25°C to 55°C, assuming the specific heat of silv

er
is 0. 24 J/gºC?

30

108

15 J

115 J
Chemistry
1 answer:
Alenkasestr [34]2 years ago
6 0

Answer:

108 j

Explanation:

.24 j/g-C  * 15 g * (55-25) =

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When solutions of silver nitrate and sodium chloride are mixed, a precipitation reaction occurs. What mass of precipitate can be
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Explanation:

The given precipitation reaction will be as follows.

        AgNO_{3}(aq) + NaCl(aq) \rightarrow AgCl(s) + NaNO_{3}(aq)

Here, AgCl is the precipitate which is formed.

It is known that molarity is the number of moles present in a liter of solution.

Mathematically,       Molarity = \frac{\text{no. of moles}}{\text{volume in liter}}

It is given that volume is 1.14 L and molarity is 0.269 M. Therefore, calculate number of moles as follows.

                    Molarity = \frac{\text{no. of moles}}{\text{volume in liter}}

                     0.269 M = \frac{\text{no. of moles}}{1.14 L}

                    no. of moles = 0.306 mol

As molar mass of AgCl is 143.32 g/mol. Also, relation between number of moles and mass is as follows.

               No. of moles = \frac{mass}{\text{molar mass}}

                   0.307 mol = \frac{mass}{143.32 g/mol}

                           mass = 43.99 g

Thus, we can conclude that mass of precipitate produced is 43.99 g.

                 

8 0
3 years ago
Can someone please explain what to do it’s late at night and I need sleep but I forgot I had this homework please help me with a
Rus_ich [418]

Answer:

1) it takes 13 second

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3) 40 miles / hours

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2 years ago
When balancing a chemical equation can you adjust the number that is subscripted to a substance formula?
Ugo [173]
No, you can't do that
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Consider the following unbalanced particulate representation of a chemical equation:
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The two reactants are diatomic molecules because they contain two atoms of the same element. Therefore, they would need to have a subscript of "2" next to their symbols.

When balancing an equation, you want the same amount and type of atoms on both sides. By adding a coefficient of "2" in front of the product, two H's and two I's are now on both sides.

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3 years ago
What is meant by the following statement?
Yanka [14]

Answer:

D.

Explanation:

Inverse and proportional means as one goes up the other goes up or if one goes down the other goes down.

- Hope that helped! Please let me know if you need further explanation.

6 0
3 years ago
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