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Vilka [71]
2 years ago
7

How many feet are in 6.75 miles? (6.75x1) divided by 5280 =

Chemistry
1 answer:
disa [49]2 years ago
7 0

Answer:

0.00127840909

Explanation:

yehehdhdalakdjhd

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kap26 [50]

Answer:

Correct option would be A. Mg(s) → Mg2+ + 2e-

Explanation:

Marked as correct answer on Quiz ;) (A P E X)

7 0
2 years ago
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Help please I’m being timed!
Firlakuza [10]

Answer:

a

Explanation:

3 0
2 years ago
A substance floats or sinks in another because of its relative
almond37 [142]
Its relative density causes objects to float or sink.
If the density of the substance is greater than the substance it is in, it will sink.
If the density is less than the substance it is in it will float.
5 0
2 years ago
Let's assume you were given 2.0 g benzil, 2.2 g dibenzyl ketone, 50 mL 95% ethanol and 0.3 g potassium hydroxide to synthesize t
almond37 [142]

Answer:

the % yield is 82%

Explanation:

Given the data in the question,

we know that;

Molar mass of benzil is 210.23 g·mol−1

Molar mass of dibenzyl ketone is 210.27 g·mol−1

Molar mass of tetraphenylcyclopentadienone is 384.5 g·mol−1

Now,

2.0 g benzil = 2 g / 210.23 g·mol−1 = 0.0095 mole

2.2 g dibenzyl ketone = 2.2 / 210.27 = 0.0105 mole

3.0 g of tetraphenylcyclopentadienone = 3 / 384.5  = 0.0078 mole

Now, the limiting reagent is benzil. 0.0095 mole can reacts wiyh 0.0095 mole of dibenzyl ketone

percentage yield = ( 0.0078 mole / 0.0095 mole ) × 100%

= 0.82 × 100%

= 82%

Therefore, the % yield is 82%

3 0
3 years ago
Why did oceans not exist on Earth nearly 4 billion years ago?
rusak2 [61]
B. water remained a gas because earth was very hot
7 0
3 years ago
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