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3 years ago

15

After creating a definition for what it means to be sexually abstinent, list reasons why being abstinent is important for you an

d your future.

1 answer:

Sever21 [200]3 years ago

5 0

Sexually abstinent: refraining from some or all sexual activities
school (higher education)
health (stds)
pregnancy (not ready for children)

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A brick has a mass of and the Earth has a mass of . Use this information to answer the questions below. Be sure your answers hav

Deffense [45]

Complete question

A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 X 10²⁷ g. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.

Answer:

The mass of 1 mole of bricks = 24 X 10²⁶ g (2 significant digits), and

2.5 moles of bricks (2 significant digits) have a mass equal to the mass of the Earth.

Explanation:

Given mass of bricks = 4.0 kg

4.0kg of brick = 4000g

1 mole of any substance always contain 6.022 X 10²³ Avogadro's number

1 mole of bricks contains 6.022 X 10²³ bricks

Therefore, mass of 1 mole of brick = 6.022 X 10²³ X 4000g

= 4000 X 6.022 X 10²³ g

= 24088 X 10²³ g

The mass of 1 mole of bricks = 24 X 10²⁶ g (2 significant digits)

-----------------------------------------------------------------------------------------------------

⇒How many moles of bricks have a mass equal to the mass of the Earth?

Given mass of Earth = 6.0 X 10²⁷ g

24088 X 10²³ g --------> mass of 1 mole of bricks

6.0 X 10²⁷ g --------------> ?

= (6.0 X 10²⁷ g)/(24088 X 10²³ g)

= 2.4909 moles of bricks

≅ 2.5 moles of bricks ( 2 significant digits)

Therefore, 2.5 moles of bricks have a mass equal to the mass of the Earth

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3 years ago

Balance this chemical equation. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici

larisa86 [58]

The first one have a nice day and good luck

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2 years ago

Identify the relationship between <2 and <4*

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I don’t understand your questions can you elaborate

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A galvanic cell consists of a Cu(s)|Cu2+(aq) half-cell and a Cd(s)|Cd2+(aq) half-cell connected by a salt bridge. Oxidation occu

Kryger [21]

Answer:

$Cd(s)|Cd^{2+}(aq) || Cu^{2+}(aq)|Cu(s)$

Explanation:

A galvanic cell is composed of two electrodes immersed in a suitable electrolyte and connected via a salt bridge. One of the electrodes serves as a cathode where reduction or gain of electrons takes place. The other half cell functions as an anode where oxidation or loss of electrons occurs.

The representation is given by writing the anode on left hand side followed by its ion with its molar concentration. It is followed by a salt bridge. Then the cathodic ion with its molar concentration is written and then the cathode.

As it is given that cadmium acts as anode, it must be on the left hand side and copper must be on right hand side.

$Cd(s)|Cd^{2+}(aq) || Cu^{2+}(aq)|Cu(s)$

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3 years ago

Describe the kinetic energy/ movement of the particles in plasma.

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kinetic energy is a moving object potential energy is stored energy

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3 years ago

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