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2 years ago

6

How many calcium atoms in Ca(ClO3)2?

1 answer:

Serjik [45]2 years ago

8 0

Answer:

1

Explanation:

There is only one calcium atom because the subscript 3 applies only to the oxygen. Outside of the parentheses, the subscript 2 only applies to the chlorate ion. Therefore, there is only one calcium atom because there are no coefficients and subscripts. (Also drawing it out will help)

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A base can neutralize an acid. true or false

konstantin123 [22]

Answer:

false. acids do not neutralize bases.

Explanation:

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3 years ago

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How many moles of oxygen are present in 33.6l of the gas at 1atm and 0c

andreev551 [17]

The answer is: 1.5 moles of oxygen are present.

V(O₂) = 33.6 L; volume of oxygen.

p(O₂) = 1.0 atm; pressure of oxygen.

T = 0°C; temperature.

Vm = 22.4 L/mol; molar volume at STP (Standard Temperature and Pressure).

At STP one mole of gas occupies 22.4 liters of volume.

n(O₂) = V(O₂) ÷ Vm.

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n(O₂) = 1.50 mol; amount of oxygen.

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3 years ago

B. Bromine melts at -7.2°C. What is<br> bromine's melting point in kelvins?

Mars2501 [29]

Answer: 265.95 kelvins

Explanation:

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3 years ago

A scientist found a new species in a rain forest. The species was small and green in color. She examined one of its many cells a

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3 years ago

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What is the expected value for the heat of sublimation of acetic acid if its heat of fusion is 10.8 kJ/mol and its heat of vapor

Dennis_Churaev [7]

Answer:

35.1 kJ/mol is the expected value for the heat of sublimation of acetic acid.

Explanation:

$CH_3COOH(l)\rightarrow CH_3COOH(g)$ ..[1]

Heat of vaporization of acetic acid = $H^o_{vap}=24.3 kJ/mol$

$CH_3COOH(s)\rightarrow CH_3COOH(l)$ ..[2]

Heat of fusion of acetic acid = $H^o_{fus}=10.8 kJ/mol$

Heat of sublimation of acetic acid = $H^o_{sub}=?$

$CH_3COOH(s)\rightarrow CH_3COOH(g)$ ..[3]

[1] + [2] = [3] (Hess's law)

$H^o_{sub}=H^o_{vap}+H^o_{fus}$

$=24.3 kJ/mol+10.8 kJ/mol=35.1 kJ/mol$

35.1 kJ/mol is the expected value for the heat of sublimation of acetic acid.

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2 years ago