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3 years ago

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Chemistry

1 answer:

Arada [10]3 years ago

8 0

Answer:

B). The rocks are being chemically weathered by the water.

Explanation:

Because the water is slowly destroying the rock

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Answer the following questions in brief.<br>Why does silver get tarnished on exposure to air?

Studentka2010 [4]

Answer: When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish. This process is called tarnishing.

Hope this helped :)

5 0

3 years ago

If a chemical is oxidized it is also known as the

RUDIKE [14]

Answer:

D.) reducing agent

Explanation:

Oxidized chemicals gain electrons. In order to gain these electrons, another chemical must lose electrons. So, the chemical (which will be oxidized) acts as a reducing agent, causing the other chemical to be reduced and lose electrons.

4 0

2 years ago

What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?

olga_2 [115]

Answer is 0.7 g

Reason: Given: mass of Fe = 5.60 gWe know that, half life of Fe-53 = t1/2 (Fe-53) = 8.51 min.
Thus, after 25.53 mins, number of half life passed = 25.53/8.51= 3

Now, Amount left after first half life = 5.60g/2 = 2.80 g
Amount left after second half life = 2.80g/2 = 1.40 g
Amount left after third half-life = 1.40g/2 = 0.7g.

4 0

4 years ago

I need an Honest answer.. and I also didnt know where to post this question under.

Alenkinab [10]

She likes you and has the feels

5 0

4 years ago

Read 2 more answers

At a particular temperature, the solubility of Kr in water is 0.060 M when the partial pressure is 0.90 atm. What partial pressu

elena55 [62]

At a particular temperature, the solubility of He in water is 0.060 M when the partial pressure is 0.90 atm. 2.27 atm is the partial pressure of Kr would give a solubility of 0.150 M.

<h3>What is Henry's Law ?</h3>

According to Henry's law, the weight of a gas dissolved by a liquid is proportional to the pressure of the gas onto the liquid.
With very few exceptions, a solute molecule in an extremely diluted solution will only have solvent molecules as its close neighbors. This means that the likelihood that a specific solute molecule will escape into the gas phase is predicted to be independent of the total concentration of solute molecules.

Solution:

The solubility of gas is directly proportional to partial pressure. It is expressed as:

S = $K_ h \times P _g_a_s$

where, S = Solubility of gas

$K_h$ = Henry's Law constant

$P_g_a_s$ = Partial pressure of gas

Now, put the values in above expression we get

0.060M = $K_h$ × 0.9 atm

$K_h$ = = 0.066 M/atm

Now we have to find the partial pressure of He

0.150 M = 0.066 M/atm × $P_g_a_s$

$P_g_a_s$ = 2.27 atm

Learn more about the Henry's Law : brainly.com/question/23204201

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3 0

2 years ago