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True [87]
3 years ago
6

HELP!! Please answer!

Chemistry
1 answer:
zloy xaker [14]3 years ago
5 0

Answer: the % is 99.73 and the mass is 40.986

Explanation:

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Why are bacteria necessary for life on Earth to exist? Select three options.
gladu [14]

Answer:

Bacteria decompose rotting plant animal material.

Explanation:

Theres good bacteria, and theres bad bacteria. some helps, and some makes things worse. so really, in some sense all of the above.

Hope that helps.

4 0
3 years ago
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Rank the metals from most reactive (1) to least reactive (3) silver, strontium, and technetium
Natasha2012 [34]

Answer:

1 = strontium

2 = technetium

3 = silver

Explanation:

Strontium is present in 2 group of periodic table. It is alkaline earth metal. It is most reactive element and can not found free in nature. it  is insoluble in water but react with water and form strontium hydroxide and hydrogen gas is also produced. It is radioactive element.

It is similar to the calcium and can incorporated into bones. The food rich with strontium is used to avoid the osteoporosis. It is found in leafy vegetables, grains, sea foods etc.

In given series strontium is highest in reactivity then technetium, while the technetium is more reactive than silver. The silver is less reactive as compared to both given elements.

7 0
3 years ago
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Why do cactuses have roots if they already restore water inside themselfs
Alinara [238K]

Answer:

To stay on the ground, say during a storm, the roots help keep the plant anchored

Explanation: "hope this helps"

7 0
4 years ago
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Now assume 3 miles al and 4 moles br2 react
larisa [96]
Al + Br2 → AlBr3 To balance the Br’s, make 3 Br2 and 2 AlBr3. Al + 3 Br2 → 2 AlBr3
To balance the equation, make 2 Al.
2 Al + 3 Br2 → 2 AlBr3 ...... if you would like more information please let me know and I can help you out
6 0
3 years ago
5. Organisms that make their own energy storage molecules are called producers. What process do
Dominik [7]

Answer:

I think it's metabolism

Hope this helps

3 0
3 years ago
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