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Charra [1.4K]
3 years ago
14

Which statement is true? (2 points) Select one: a. Geothermal power plants use the renewable resource of heat from within the Ea

rth to generate electricity. B. Hydroelectric energy uses the energy from the sun, which is a renewable resource. C. Oil is a nonrenewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply. D. Solar energy is a nonrenewable resource that is used by many countries all over the world.
Chemistry
1 answer:
love history [14]3 years ago
5 0

The correct answer is A, since it is the only sensible answer.

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How many molecules are in 7.34 g of Na2CO3
kenny6666 [7]

Answer:

The answer is 105.98844.

<h3>Explanation: </h3>

We assume you are converting between grams Na2CO3 and mole. You can view more details on each measurement unit: molecular weight of Na2CO3 or mol This compound is also known as Sodium Carbonate.

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Gravity relates to a stream's ability to erode and deposit material by causing water to flow faster down a steep slope. True or
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Answer:

true

Explanation:

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What is the number of moles in 15.0 g AsH3?
pentagon [3]

We are given with the mass of Arsine (AsH_{3}

The mass of arsine is 15g

there is a relation between moles, mass and molar mass of any compound which is

moles=\frac{mass}{molarmass}

The molar mass of Arsine = atomic mass of As + 3X atomic mass of H

the molar mass of Arsine = 74.92 + 3X 1 = 77.92 g/mol

Let us calculate the moles as

moles=\frac{15}{77.92}=0.192mol


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3 years ago
3. Scientific methods may include three steps of study as listed below. Explain each step in detail with a complete content rela
victus00 [196]

Answer:

Hypothesis is an assumption or idea about a particular topic or argument. An hypothesis should be one which is able to be tested and measurable to determine its authenticity.

A theory is an explanation of a scientific observation which has undergone series of experiments and is reproducible in any part of the world.

A law is simply a rule which gives an in depth explanation of a scientific finding. If new findings emerge the law could be changed or modified.

8 0
3 years ago
Which atom below would be MOST likely to form a compound with magnesium (Mg) in a ratio of one to one?
fiasKO [112]

Answer:

C

Explanation:

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