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nadezda [96]
3 years ago
9

In the science lab, students are testing solutions as acids or bases. the ph level of solution "x" was determined to be an 8. wh

at is solution "x"?
Chemistry
1 answer:
monitta3 years ago
5 0
Solution 'X" would be a base. 

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Why is the composition of Earth's atmosphere different from the composition of the atmospheres of Venus and Mars? A. Venus, Mars
rewona [7]

Answer:

they all have different chemical compositions from earth

Venus is more filled with carbon dioxide and nitrogen

earth is filled more with oxygen and nitrogen

mars is filled more with carbon dioxide and carbon monoxide

so ur answer is C

it cant be B as scientists and NASA are still in the look out for life, D has nothing to do with chemicals and atmosphere, and its not A cuz they all dont have the same similiar chemical.

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6 0
4 years ago
How many moles are in 13.0 grams of water​
ira [324]

13.0/18=.07222222

sig figs: 0.722 mole of water

6 0
4 years ago
What is the change in vapor pressure when 74.60 g fructose, C6H12O6, are added to 185.5 g water (H2O) at 298 K (vapor pressure o
Vlad1618 [11]

Answer:

Vapor pressure of pure water: 3.1690 kPa

Explanation:

Vapor pressure is P=0.955(3.1690)=3.0263 kPa

Change in vapor pressure : 3.169-3.0263=0.142 kPa

3 0
3 years ago
Suppose you need to make the following two precipitates (by two different precipitation reactions): MgCO3 and Ca3(PO4)2. For eac
Setler [38]

Answer:

For the first reaction the reagents are: MgCl2 and Na2CO3

For the second reaction the reagents are: Na2HPO4 and CaCl2

Explanation:

Precipitation reactions lie in the production of a compound that is not soluble, which is called a precipitate, this precipitate is produced when two different solutions are combined, each of which will contribute an ion for the formation of the precipitate. In the first reaction you have:

MgCl2 + Na2CO3 = MgCO3 + 2 NaCl

Type of reaction: double displacement

The second reaction is as follows:

4Na2HPO4 + 3CaCl2 → Ca3 (PO4) 2 + 2NaH2PO4 + 6NaCl

It is the reaction of sodium hydrochlorophosphate and calcium chloride

3 0
3 years ago
When 50.0 g of silicon dioxide is heated with an excess of carbon, 32.2 g of silicon carbide is produced. SiO2 (s) + 3 C (s) → S
Elan Coil [88]

Answer:

0.97g

Explanation:

3 0
3 years ago
Read 2 more answers
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