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ankoles [38]
3 years ago
9

Renewable resources are considered clean because they don't cause what

Chemistry
1 answer:
AfilCa [17]3 years ago
7 0

Answer:

I think maybe carbon ?

Explanation:

You might be interested in
2Na + 2H20 - 2NaOH + H2
Paul [167]

Answer: B) Ten moles of sodium hydroxide and five moles of hydrogen gas will be produced

Explanation: Got it right on USATestPrep

8 0
2 years ago
What mass of solid sodium formate (of MW 68.01) must be added to 150 mL of 0.42 mol/L formic acid (HCOOH) to make a buffer solu-
Sergio [31]

Answer:

We need 4.28 grams of sodium formate

Explanation:

<u>Step 1:</u> Data given

MW of sodium formate = 68.01 g/mol

Volume of 0.42 mol/L formic acid = 150 mL = 0.150 L

pH = 3.74

Ka = 0.00018

<u>Step 2:</u> Calculate [base)

3.74 = -log(0.00018) + log [base]/[acid]

0 = log [base]/[acid]

0 = log [base] / 0.42

10^0 = 1 = [base]/0.42 M

[base] = 0.42 M

<u>Step 3:</u> Calculate moles of sodium formate:

Moles sodium formate = molarity * volume

Moles of sodium formate = 0.42 M * 0.150 L = 0.063 moles

<u>Step 4:</u> Calculate mass of sodium formate:

Mass sodium formate = moles sodium formate * Molar mass sodium formate

Mass sodium formate = 0.063 mol * 68.01 g/mol

Mass sodium formate = 4.28 grams

We need 4.28 grams of sodium formate

4 0
3 years ago
A students has a sample of rock that has a mass of 25 grams and when placed in water has displaced the water about 10 ml. What i
ICE Princess25 [194]
It is 2.5g/ml. You can find this answer by taking the mass (25g) and dividing it by the volume (10ml) and you will get your answer of 2.5g/ml.
8 0
3 years ago
How many atoms are in 6.78x1024 molecules of oxygen gas? PLEASE HELP WILL marK braNLIes
sineoko [7]
6942.72
I hope this works!
4 0
3 years ago
Potassium-40 has a half-life of 1.3 billion years. as the potassium-40 isotope decays, it becomes argon. if a rock was formed wi
Marina CMI [18]
The half life of a substance is the time taken by a radioactive substance to decay by half its original mass. In this case, the half life of Potassium-40 is 1.3 billion years. 
Original mass of Potassium-40 = 12 g (100%)
New mass after the decay = 3 g ( 25 %, since 75% was replaced by argon)
New mass = Original mass × (1/2)^n ; where n is the number of half lives. 
 3 = 12 × (1/2)^n
(1/2)^n = 1/4 
      n = 2 
Therefore; the time taken will be 1.3 × 2 = 2.6 Billion years
3 0
4 years ago
Read 2 more answers
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