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Mnenie [13.5K]
3 years ago
15

Which statement is most accurate?

Chemistry
2 answers:
Anna [14]3 years ago
7 0
The optical density of a medium is not the same as its physical density. ... The more optically dense that a material is, the slower that a wave will move through the material<span>. ...</span>
FinnZ [79.3K]3 years ago
5 0
I'm pretty sure the answer is D. the more optically dense the material, the higher the refractive index. Sorry if this is wrong.
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Given the equation Ca + H2O --&gt; Ca(OH)2 + H2 how many grams of calcium will react completely with 10.0 grams of water? *
Yuki888 [10]

Answer: 11.0 g of calcium will react with 10.0 grams of water.

Explanation:

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

moles of H_2O

\text{Number of moles}=\frac{10.0g}{18g/mol}=0.55moles

The balanced chemical equation is:

Ca+2H_2O\rightarrow Ca(OH)_2+H_2

According to stoichiometry :

2 moles of H_2O require = 1 mole of Ca

Thus 0.55 moles of H_2O require=\frac{1}{2}\times 0.55=0.275moles  of Ca  

Mass of Ca=moles\times {\text {Molar mass}}=0.275moles\times 40g/mol=11g

Thus 11.0 g of calcium will react with 10.0 grams of water.

3 0
3 years ago
Phosphine, PH3(g), decomposes according to the equation 4PH3(g) --&gt; P4(g) + 6H2(g) The kinetics of the decomposition of phosp
TEA [102]

good luck with that. I thought I had it, but it was not right.

3 0
3 years ago
Read 2 more answers
The reaction converting glycerol to glycerol-3-phosphate can be represented as: glycerol + hpo42− ⟶ glycerol-3-phosphate + h2o.
Volgvan

Answer;

Yes; this reaction be spontaneous if coupled with the hydrolysis of ATP.

Explanation;

The reaction converting glycerol to glycerol-3-phosphate (energetically unfavorable) can be coupled with the conversion of ATP to ADP (energetically favorable):

Glycerol + HPO42 ⟶glycerol-3-phosphate+H2O

ATP + H2O⟶ ADP + HPO42− + H+

6 0
3 years ago
Read 2 more answers
What happens in a reduction half-reaction?
Marta_Voda [28]
The answer is elements gain electrons. Oxidation reduction is elements lose electrons. And oxygen is added/lost can be a type of oxidation/reduction reaction.
3 0
3 years ago
Read 2 more answers
Is this right, I feel like its wrong
hjlf

It is correct, next time re-check your answer and don't second guess yourself. ;3

7 0
3 years ago
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