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anastassius [24]
3 years ago
5

The ___ is the number of protons in the nucleus of an atom of an element. Fill in the blank.

Chemistry
1 answer:
Maurinko [17]3 years ago
8 0
The atomic number is the number of protons in the nucleus
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True or false: a physical property is a characteristic of matter that you cannot observe or measure without changing the identit
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4 years ago
The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release
KATRIN_1 [288]

The mass of melted gold to release the energy would be  3, 688. 8 Kg

<h3>How to determine the mass</h3>

The formula for quantity of energy is given thus;

Q = n × HF

Where n represents number of moles

HF  represents  heat of fusion

To find the number of moles, we have

235.0 = n × 12.550

number of moles = \frac{235}{12. 550} = 18. 725 moles

Note that molar mass of Gold is 197g/ mol

Let's note that;

Number of moles = mass/ molar mass

Mass = number of moles × molar mass

Mass = 18. 725 × 197

Mass = 3, 688. 8 Kg

Thus, the mass of melted gold to release the energy would be  3, 688. 8 Kg

Learn more about molar heat of fusion here:

brainly.com/question/15634085

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8 0
2 years ago
What are four indications that a chemical reaction bay be taking place
Mariana [72]
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3 0
3 years ago
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Amiraneli [1.4K]

Answer:

C

Explanation:

The reason why C is true is because this species of plant requires certain things to survive, and without said requirements they will die. Hence, the animal that is unable to compete will die and be eliminated from the ecosystem. Hope that helps!

6 0
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What elements in the periodic table might combine with oxygen to form magnesium oxide?
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3 0
3 years ago
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