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Alexeev081 [22]
3 years ago
14

Many chemical processes involve substances in either the liquid or gaseous state. Which of the following statements is correct?

Chemistry
1 answer:
Mrac [35]3 years ago
7 0
A specific mass of a gas has a fixed volume at room temperature
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8. If the temperature of a piece of steel decreases, what happens to its density?
Verdich [7]

Answer:

I think the answer is the 3rd one

3 0
3 years ago
How many moles of HNO3 are present if 4.90×10−2 mol of Ba(OH)2 was needed to neutralize the acid solution?
Amiraneli [1.4K]

Answer:

0.098 moles

Explanation:

Let y represent the number of moles present

1 mole of Ba(OH)₂ contains 2 moles of OH- ions.

Hence, 0.049 moles of Ba(OH)2 contains y moles of OH- ions.

To get the y moles, we then do cross multiplication

1 mole *  y mole = 2 moles * 0.049 mole

y mole = 2 * 0.049 / 1

y mole =  0.098 moles of OH- ions.

1 mole of OH- can neutralize 1 mole of H+

Therefore, 0.098 moles of HNO₃ are present.

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3 years ago
Do 150.0 grams and 150 grams mean the same thing
CaHeK987 [17]

Answer:

yes 150.0grams = 150grams

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Alborosie

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c

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kinetic energy can be calculated using the formula

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Covalent compounds do not conduct electric current in a water solution well because they _____.
siniylev [52]
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