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mezya [45]
3 years ago
5

PLEASE HELP FAST !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
1 answer:
MakcuM [25]3 years ago
5 0
The answer is D: 400N
your welcome

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One mole of a metallic oxide reacts with one mole of hydrogen to produce two moles of the pure metal
Rudiy27

Answer:

Lithium oxide, Li₂O.

Explanation:

Hello!

In this case, according to the given amounts, it is possible to write down the chemical reaction as shown below:

M_2O+H_2 \rightarrow 2M+H_2O

Which means that the metallic oxide has the following formula: M₂O. Next, we can set up the following proportional factors according to the chemical reaction:

5.00gM_2O*\frac{1molM_2O}{(2x+16)gM_2O}*\frac{2molM}{1molM_2O}*\frac{xgM}{1molM}   = 2.32gM

Thus, we perform the operations in order to obtain:

\frac{10x}{2x+16}=2.32

So we solve for x as shown below:

10x = 2.32(2x+16)\\\\10x = 4.64x+37.12\\\\x = \frac{37.12}{10-4.64}\\\\x= 6.93 g/mol

Whose molar mass corresponds to lithium, and therefore, the metallic oxide is lithium oxide, Li₂O.

Best regards!

8 0
3 years ago
Which statement is best supported by this scale? (LT 2)
bearhunter [10]

Answer:

The answer is C I think..

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2 years ago
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A solution has a [OH−] of 1 x 10−12. What is the pOH of this solution?<br> 2<br> 7<br> 10<br> 12
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-log (1×10^-12) is how you calculate the pOH which in this case is 12
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What happens to dissolving rate when you increase KE?
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In general, solubility increases with temperature. When you increase the temperature of a solvent, you increase the kinetic energy (or energy of movement) of the molecules, and this greater energy helps dissolve more of the solute molecules.
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According to "When Is a Planet Not a Planet?" scientists determined that Pluto was not a planet. What were the causes that led t
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C.
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These should be the main reasons. As Pluto was mainly categorized in dwarf planet for not being able to satisfy the last statement which states that it should have a fixed neighbourhood with other planets.
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