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Maurinko [17]
3 years ago
8

What is the ratio by atoms of elements present in technetium (VII) peroxide? (peroxide

Chemistry
1 answer:
d1i1m1o1n [39]3 years ago
5 0

Answer: 1:7

Explanation: 2 Tc^+7 + 7 O2^-2 -> Tc2 (O2)7

Also 2 Tc to 14 O

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The sea water has 8.0x10^-1 cg of element strontium. Assuming that all strontium could be recovered, how many grams of strontium
PilotLPTM [1.2K]

984 grams of strontium will be recovered from 9.84x10^8 cubic meter of seawater.

Explanation:

From the question data given is :

volume of strontium in sea water= 9.84x10^8 cubic meter

(1 cubic metre = 1000000 ml)

so 9 .84x10^8 cubic meter

 \frac{9 .84x10^8}{1000000}      = 984 ml.

density of sea water = 1 gram/ml

from the formula mass of strontium can be calculated.

density = \frac{mass}{volume}

mass = density x volume

mass = 1 x 984

         = 984 grams of strontium will be recovered.

98400 centigram of strontium will be recovered.

Strontium is an alkaline earth metal and is highly reactive.

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3 years ago
Which activity might help to increase the validity of this experiment?
MArishka [77]
A should be the answer because the more you test an experiment the more data you have to rely on changing the experiment would cause you to have different outcomes making the results different and unreliable so B, C, and D is not going to be the answer Hope this helps
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3 years ago
I was born in ……… west.<br><br>complete this sentense with article​
Xelga [282]

Answer:

Article is

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The density of an object depends on what?<br><br><br><br> Answer correctly and quick!
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Density of a quantity of matter is its mass divided by its volume. The mass of an object depends on the atomic mass of the individual atoms or molecules and the how close the they are compressed together.

Explanation:

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what concept?

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