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frutty [35]
1 year ago
10

Write an equation that gives the relationship between the cross-sectional area (a), the volume (v), and the thickness of a cylin

der.
Chemistry
1 answer:
Mazyrski [523]1 year ago
7 0
V = at
Where t is thickness
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2 years ago
What is the value of delta Hrxn for this equation:
Ratling [72]

Answer:

The ΔHrxn for the above equation = 179 kJ/mol

Explanation:

The reaction bond enthalpies are for the reactant;

3 × N-H = 3 × 390 = 1,170 kJ/mol

2 × O=O = 2 × 502 = 1004 kJ/mol

The reaction bond enthalpies are for the product;

3 × N-O = 3 × 201 = 603 kJ/mol

3 × O-H = 3 × 464 = 1,392 kJ/mol

The ΔHrxn for the above equation is therefore;

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Using aluminium as an example, describe the key properties of p-block metals.
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Answer:

P-block metals have classic metal characteristics like they are shiny, they are good conductors of heat and electricity, and they lose electrons easily. These metals have high melting points and readily react with nonmetals to form ionic compounds.

Explanation:

6 0
2 years ago
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Which of the following are physical characteristics of blood? 1. it is more viscous than water 2. its temperature is about 38ºC
yawa3891 [41]

Explanation:

A property which does not bring any change in chemical composition of a substance is known as physical property.

For example, blood is more viscous than water, its pH is slightly alkaline, its temperature is about 38^{o}C (100.4^{o}F)  .

On the other hand, a property which changes chemical composition of a substance is known as a chemical property.

For example, precipitation, reactivity, toxicity etc are chemical property.

Sometimes, the change in color of a substance can also occur due to a chemical change.

Thus, we can conclude that following are the physical characteristics of blood.

  • it is more viscous than water.
  • its temperature is about 38^{o}C (100.4^{o}F).
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  • it is about 8% of one’s total body weight.
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Which nonmetals in the atmosphere and their combinations are essential for life on earth
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Nitrogen, oxegyn, and water are nonmetals in the atmosphere and combinations are essential for life on earth
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2 years ago
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