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3 years ago

How does an object become negatively charged?

2 answers:

4 0

It gains electrons. Electrons are negatively charged subatomic particles; so when an atom gains an electron it becomes net negative.

Paha777 [63]3 years ago

3 0

<u>Answer:</u> The correct answer is it gains electrons.

<u>Explanation:</u>

There are 3 subsatomic particles in an atom: Electrons, neutrons and protons.

Neutrons does not carry any charge on them. They are neutral particles.

Protons carry positive charge on them.

Electrons carry negative charge on them.

In an element, number of protons and electrons remains the same.

When an element looses electrons, the number of protons increases than electrons. Thus, the element will have a positive charge.

When an element gains electrons, the number of electrons is more than the number of protons. Thus, the element will have a negative charge.

Hence, the correct answer is it gains electrons.

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The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centimeter of Cr?

Masja [62]

To calculate the number of atoms of Cr, we first find the number of moles per unit of cubic centimeter of Cr. Then, use avogadros number for the number of atoms. Calculations are as follows:

1 cm^3 (7.15 g/cm^3) (1 mol / 51.996 g Cr) = 0.14 mol Cr

0.14 mol Cr ( 6.022 x 10^23 atoms Cr / 1 mol Cr ) = 8.28 x 10^22 atoms Cr

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3 years ago

In a ceiling fan, N, electrical energy is converted to M, Kinetic energy. Some of the energy is "wasted" as heat. What is someth

Kruka [31]

Answer: It's D

Explanation:

I just did this question and i picked C but it's actually D

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3 years ago

Read 2 more answers

A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. Calculate the pressure when the volume is 1.41 L and the

Vlad1618 [11]

A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. 1.76 atm is the pressure when the volume is 1.41 L and the temperature is 298 K.

<h3>What is Combined Gas Law ?</h3>

This law combined the three gas laws that is (i) Charle's Law (ii) Gay-Lussac's Law and (iii) Boyle's law.

It is expressed as

$\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}$

where,

P₁ = first pressure

P₂ = second pressure

V₁ = first volume

V₂ = second volume

T₁ = first temperature

T₂ = second temperature

Now put the values in above expression we get

$\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}$

$\frac{1.02\ atm \times 2.30\ L}{281\ K} = \frac{P_2 \times 1.41\ L}{298\ K}$

$P_{2} = \frac{1.02\ atm \times 2.30\ L \times 298\ K}{281\ K \times 1.41\ L}$

P₂ = 1.76 atm

Thus from the above conclusion we can say that A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. 1.76 atm is the pressure when the volume is 1.41 L and the temperature is 298 K.

Learn more about the Combined gas Law here: brainly.com/question/13538773

#SPJ4

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2 years ago

What does it mean when a wave's amplitude increases?

djverab [1.8K]

Answer: It's frequency also increases.

Explanation:

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. ... The amplitude of a wave is related to the amount of energy it carries. A high amplitude wave carries a large amount of energy; a low amplitude wave carries a small amount of energy.

Hope this helps! Have a blessed day! Please mark me as brainlyest!?

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3 years ago

What is the correct noble gas configuration for Ba?

kvasek [131]

I think the answer is [Xe] 6s2

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3 years ago