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Triss [41]
2 years ago
11

13. Mercury has one of the lowest heat capacities. If 257J of heat are added to 5500g of mercury,the mercury's temp will increas

e by 5.5 degrees Celsius. What is the specific heat capacity of mercury?
Chemistry
1 answer:
NikAS [45]2 years ago
3 0

Given:

257J of heat

5500g of mercury

increase by 5.5 degrees Celsius

Required:

Specific heat of mercury

Solution:

H = mCpT

257J = (5500g of mercury) Cp (5.5 degrees Celsius)

Cp = 8.5 x 10^-3 Joules per gram per degree Celsius

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To determine the formula units of the given compound, we need to convert from grams to moles first then convert it to formula units by using the Avogadro's number. We do as follows:

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4 0
3 years ago
- What is the concentration of hydrogen ions if the pH is 12?
Xelga [282]

Answer:

There are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Explanation:

Because pH is a logarthmic scale, we can use the formula:

[

H

+

]

=

10

-pH

. Where...

=>

[

H

+

]

is the concentration of hydrogen ions in the solution.

=>

p

H

is the pH of the solution.

=> Where

10

is the base of the power - it's a logarithm formula.

We can now just sub in the values and solve for [

H

+

]

.

[

H

+

]

=

10

-pH

=

10

−

(

12.83

)

=

1.479108388

×

10

−

13

We can round (if required) to

1.479

×

10

−

13

.

Thus, there are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Hope this helps :)

5 0
2 years ago
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