3 years ago

Why is it important to learn about fuels and gases?

Chemistry

1 answer:

Blababa [14]3 years ago

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Because you would want to know how they harm and benefit you.

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GenaCL600 [577]

Answer:

Option no 3

Explanation:

Metallic elements aren't usually crumbled in normal air pressure and conditions.

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A balloon is inflated such that a radius is 7 cm what is the volume of air inside the balloon in milliliters

DedPeter [7]

Answer:

$V=14373.33\ \text{mm}^3$

Explanation:

It is given that,

The radius of the inflated balloon is 7 cm.

We need to find the volume of air inside the balloon in milliliters.

The balloon is in the shape of a sphere whose volume is given by :

$V=\dfrac{4}{3}\pi r^3\\\\\text{Put r = 7 cm}\\\\V=\dfrac{4}{3}\times \dfrac{22}{7}\times 7\times 7\times 7\\\\V=1437.33\ \text{cm}^3\\\\\text{We know that, 1 cm = 10 mm}\\\\\text{So},\\\\V=14373.33\ \text{mm}^3$

Hence, the volume of the air inside the balloon is $14373.33\ \text{mm}^3$ .

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3 years ago

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? A) 6 B) 8 C) + 1 D) 12 E) 18

Oksana_A [137]

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Atomic mass of an atom is defined as the sum of number of neutrons and number of protons that are present in an atom. It is represented as 'A'.

Atomic number = Number of protons + Number of neutrons

We are given:

Number of protons = 6

Number of neutrons = 6

Number of electrons = 6

Atomic mass = 6 + 6 = 12

Hence, the correct answer is Option D.

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3 years ago

Chemistry 10th grade PLEASE really need these answers :(

oksian1 [2.3K]

Answer:

I hope this helped you.

Explanation:

A: 1

B: 3

C: 3

D: 3

E: 5

F: 5

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3 years ago