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kaheart [24]
3 years ago
6

HELP ASAP PLS I'LL GIVE YOU BRAINLIEST

Chemistry
1 answer:
AURORKA [14]3 years ago
5 0

Answer:

A

Explanation:

the correct answer is A

This is the sidereal month. It is measured against the background stars. However, the Earth is also orbiting the Sun, and the moon needs extra time to catch up to its previous position relative to the Sun. 

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Which property of a wave do you think changes the most as the wave approaches the shore?
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What’s a new discovery that makes it easier to use biomass as an energy source?
stellarik [79]

Answer:

Biomass to an Energy source

Explanation:

Researchers have developed a new catalyst that directly converts cellulose, the most common form of biomass, into ethylene glycol, an important intermediate product for chemical industry. Alternatives to fossil fuels and natural gas as carbon sources and fuel are in demand.

6 0
2 years ago
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Hydrogen reacts with 0.771 g of carbon to form 0.90 g of a compound. What is the mass percent of hydrogen in the compound
andriy [413]
Hello!

Answer: 14.3%

Explanation: In order to find the mass percent of hydrogen in this compound, you must determine how many grams of hydrogen you'd get in 100 g of compound. 

In your case, you know that an unknown mass of hydrogen reacts with 0.771 g of carbon to form 0.90 g of hydrocarbon, which is a compound that contains only carbon and hydrogen. 

Use the total mass of the hydrocarbon to determine how many grams of hydrogen reacted with the carbon.

Now, if 0.90 g of this compound contain 0.129 g of hydrogen, it follows that 100 g of this compound will contain.

So, if 100 g of this compound contain 14.33 g of hydrogen, it follows that the mass percent of hydrogen is 14.3%


Hope this Helps! Have A WONDERFUL Day! :)

6 0
3 years ago
Which of the following describes a substance whose atoms all have the same number of protons? . A. Compound . B. Element . C.Ion
jenyasd209 [6]
Out of the choices given, the one that describes a substance whose atoms all have the same number of protons are an element. The correct answer will be B.
8 0
3 years ago
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What is the relationship between temperature and volume?
Lelu [443]

Answer:

Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law)

Explanation:

~Hope this helps

6 0
3 years ago
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