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Snowcat [4.5K]
2 years ago
14

As human populations grow, it becomes more important to use renewable sources of energy. Which of the following objects uses ene

rgy from a renewable source?
A-a stove that is powered by natural gas

B- a refrigerator that runs on solar power

C- a lantern that burns oil from beneath Earth's surface

D- a toaster that uses electricity from a coal-burning power plant
Chemistry
1 answer:
AleksandrR [38]2 years ago
4 0
B

explanation:
it’s common sense
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The correct answer is option a, that is, it gets broken down.  

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3 years ago
2.
Arturiano [62]

Answer:

they are producers and they have means to keep themselves warm

Explanation:

I took test and saw answer.

6 0
2 years ago
How many grams of CaCl2 are needed to make 277.8g of a solution that is 31.5% (m/m) in water? Note that mass is not technically
Sveta_85 [38]

<u>Answer:</u> The mass of calcium chloride present in given amount of solution is 87.5 g

<u>Explanation:</u>

We are given:

Mass of solution = 277.8 grams

Also, 31.5 % (m/m) of calcium chloride in water. This means that 31.5 g of calcium chloride is present in 100 g of solution.

To calculate the mass of calcium chloride in the given amount of solution, we use unitary method:

in 100 g of solution, the mass of calcium chloride present is 31.5 g

So, 277.8 g of solution, the mass of calcium chloride present is \frac{31.5}{100}\times 277.8=87.5g

Hence, the mass of calcium chloride present in given amount of solution is 87.5 g

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3 years ago
Which two minerals make up the complex hydroxyapatite?
matrenka [14]
Ca₁₀(PO₄)₆(OH)₂ - hydroxyapatite

b. phosphorus (P) and calcium (Ca)
6 0
2 years ago
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(10 points) easy WILL GIVE BRAINLIEST
nignag [31]

Answer:

Both b/c a chemical formula tells you how many and a sketch formula shows how they are bonded together.

Molecular formulas show how many atoms of each element one molecule of a compound contains. Note: Ionic compounds are generally crystalline solids with high melting points. Other compounds, however, have very different properties.

4 0
2 years ago
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