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yuradex [85]
3 years ago
8

How many moles of molecules are there in 18 grams of hydrogen. Pls help fast ASAP​

Chemistry
2 answers:
sattari [20]3 years ago
8 0

Answer:

It is equal to Avogadro's number (NA), namely 6.022 x1023.

Alina [70]3 years ago
4 0

Answer:

It is equal to Avogadro's

number (NA), namely 6.022×1023

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ASAP :))
grigory [225]

Answer:

B

Explanation:

Exergonic reactions are also called spontaneous reactions, because they can occur without the addition of energy. ... In this case, the products, or final state, have more free energy than the reactants, or initial state. Endergonic reactions are non-spontaneous, meaning that energy must be added before they can proceed.

5 0
3 years ago
Meiosis is the cell divison that occurs in non reproductive cells<br><br> True<br> False
icang [17]
The answer is true . hope this helps!
6 0
3 years ago
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
morpeh [17]
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%


<span><span><span><span><span><span><span><span><span /></span></span></span></span></span></span></span></span><span><span>
</span></span>
4 0
4 years ago
Read 2 more answers
Determine the formula unit for the compound formed when each pairs of ions interact.
Levart [38]
I think it’s aluminum cyanide but I could be wrong
8 0
3 years ago
Give the systematic (IUPAC) names for these molecules. This molecule has the condensed formula C H 3 C H 2 C O O (C 6 H 5). C 6
scoundrel [369]

Answer:

The IUPAC name of the given compound is - Methyl - 4 - methylpentanoate

Explanation:

IUPAC name of the compound helps to determine the correct structure of the compound which can be used universally in order to avoid any confusion or misinterpretation.

CH_3CH_2COO(C_6H_5)

The IUPAC name of the given compound is - phenyl propanoate.

CH_3OCOCH_2CH_2CH(CH_3)_2

The IUPAC name of the given compound is - Methyl - 4 - methylpentanoate.

6 0
3 years ago
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