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4 years ago

PLEASE HELL ME!!!!

Chemistry

2 answers:

vazorg [7]4 years ago

7 0

Answer:

<h3>The answer is 0.045 kg/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass of cylinder = 14 kg

Volume of a cylinder = πr²h

where

r is the radius

h is the height

$radius = \frac{diameter}{2} \\$

From the question

h = 25 cm

$r = \frac{4}{2} = 2 \: \: \: cm$

The volume of the cylinder is

$V = {2}^{2} (25)\pi \\ = 4 \times 25\pi \\ = 100\pi \\ = 314.159265...$

We have

volume = 314.159 cm³

The density of the cylinder is

$density = \frac{14}{314.159} \\ = 0.044563421...$

We have the final answer as

Hope this helps you

Nat2105 [25]4 years ago

3 0

Answer:

The answer is 0.045 kg/cm³

Explanation:

The density of a substance can be found by using the formula

From the question

mass of cylinder = 14 kg

Volume of a cylinder = πr²h

where

r is the radius

h is the height

From the question

h = 25 cm

The volume of the cylinder is

We have

volume = 314.159 cm³

The density of the cylinder is

We have the final answer as

0.045 kg/cm³

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3 years ago

Submit Quiz Previous Page 1 of 4 Next Drag and drop each description to match the subatomic particle. Protons Neutrons Drag and

Pavel [41]

Answer:

Protons:

Positively charged particle

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Neutrons:

Neutral particles

Isotopes of a given element differ in the number of these

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Explanation:

Protons (positively charged), neutrons (neutral) and electrons (negatively charged) are smaller than an atom and they are the main subatomic particles. The nucleus of an atom is composed of protons and neutrons, and the electrons are in the periphery at unknown pathways.

The Atomic number (Z) indicates the number of protons ( $P^{+}$ ) in the nucleus. Every atom of an element have the same atomic number, thus the same number of protons.

The mass number (A) is the sum of the number of protons ( $P^{+}$ ) and neutrons (N) that are present in the nucleus: A= Z + N

Isotopes are atoms of the same element which nucleus have the same atomic number (Z), and different mass number (A), it means the same number of protons ( $P^{+}$ ) and a different number of neutrons (N). For example, the oxygen in its natural state is a mixture of isotopes:

99.8% atoms with A= 16, Z=8, and N=8

0.037% atoms with A=17, Z=8, and N=9

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4 years ago

A container of oxygen with a volume of 60 L is heated from 300 K to 400 k, What is the new volume?

Lunna [17]

Answer:

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V2 = V1 T2/T1

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V1 = 60L

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V2 = ?

V2 = V1 T2/T1

V2 = (60L)(400K) / (300K)

V2 = 80L

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3 years ago

If 50.0 g of water saturated with potassium chloride at 80.0°C is slowly evaporator to dryness, how many grams of the dry salt w

balu736 [363]

Answer:

25.0 g.

Explanation:

From the solubility curve that is shown in the attached image, the solubility of KCl per 100.0 g of water is about 50.0 g.

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5 0

3 years ago