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REY [17]
3 years ago
14

Will mark brainlist if you answer with PROOF pls *SCIENCE*

Chemistry
1 answer:
alexgriva [62]3 years ago
3 0

Answer:

C because both are way too big to pass through the filter

Explanation:

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The test tube that contained the calcium metal was probably the most difficult of the test tubes to clean. Why was aqueous HCl u
natita [175]

Answer:

The HCl will dissolve the calcium readily

Explanation:

HCl will react with d calcium, dissolving it to produce Hydrogen gas

6 0
3 years ago
1.00 mole of an ideal gas at STP is cooled to -41°C while the
qwelly [4]

Answer:

V₂ = 18.13 L

Explanation:

Given data:

Mole of gas = 1 mol

Initial temperature = 273 K

Initial pressure = 1 atm

Final volume = ?

Final temperature = -41°C (-41+273 = 232 K)

Final pressure = 805 mmHg (805/760 = 1.05 atm)

Solution:

First of all we will calculate the initial volume of gas.

PV = nRT

V = nRT/P

V = 1 mol × 0.0821 mol.L/atm.K × 273 K / 1 atm

V = 22.4 L/atm / 1 atm

V = 22.4 L     ( initial volume)

Now we will determine the final volume by using equation,

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Now we will put the values.

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 1 atm × 22.4 L ×  232 K / 273 K × 1.05 atm

V₂ = 5196.8 atm .L. K / 286.65 atm.K

V₂ = 18.13 L

5 0
3 years ago
Which of the following is(are) used in the overall reactions for photosynthesis?
Nimfa-mama [501]

Answer:

Photosynthesis takes the energy of sunlight and combines water and carbon dioxide to produce sugar and oxygen as a waste product. The reactions of respiration take sugar and consume oxygen to break it down into carbon dioxide and water, releasing energy.

Explanation:

3 0
3 years ago
Solve and show work. How many grams of potassium permanganate, KMnO4 are need to make 1.25 L of 0.75 M solution?
viktelen [127]
Yes u can do it but using all of ur answer
7 0
3 years ago
An object velocity can be described by I s acceleration and direction
irakobra [83]

Answer:

Yes.

Explanation:

5 0
3 years ago
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