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3 years ago

15

Temperature is measured of?

1 answer:

zhannawk [14.2K]3 years ago

3 0

Kinetic energy, so B molecular movement

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What is another name for the acid dissociation constant?

sveticcg [70]

A. Ionization constant

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3 years ago

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Use your calculator to determine the answer to the following calculation:<br> 1.0×10^−15/4.2×10^−7

lianna [129]

1.0×10^−15/4.2×10^−7=<span>2.3809524e-23 Hoped I helped!</span>

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3 years ago

Matter that is made up of only one kind of Atom

sveta [45]

Answer:

elements

Matter that has only one kind of atom is called an element. Gold, copper, oxygen, and mercury are examples of elements. Most matter is made up of two or more different kinds of atoms that are chemically combined. This kind of matter is called a compound.

Explanation:

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3 years ago

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When 15.3 g of sodium nitrate, NaNO3,was dissolved in water in a calorimeter, the temperature fell from 25.00oC to 21.56oC. If t

satela [25.4K]

Answer:

20.468 kilo Joules is the enthalpy change when one mole of sodium nitrate dissolves.

Explanation:

Heat lost by solution ad calorimeter = Q

Heat capacity of solution ad calorimeter = C = 1071 J/°C

Change in temperature = ΔT = 21.56°C - 25.00°C = -3.44°C

$Q=C\times Delta T$

$Q=1071 J/^oC\times (-3.44^oC)=-3,684.24 J$

Heat gained by sodium nitrate = -Q = -(-3,684.24 J)=3,684.24 J

Moles of sodium nitrate = $\frac{15.3 g}{85 g/mol}=0.18 mol$

When 0.18 mole of sodium nitrate was dissolved in water 3,684.24 joulesof heat was absorbed by it.

Then heat absorbed by 1 mole of sodium nitrate :

$\frac{3,684.24 J}{0.18}=20,468 J=20.468 kJ$

1 J = 0.001 kJ

20.468 kilo Joules is the enthalpy change when one mole of sodium nitrate dissolves.

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3 years ago

Which of the following elements possesses an expanded octet?

stepan [7]

I think xe possess expanded octet

8 0

3 years ago