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Natali [406]
3 years ago
13

Land pollution most often occurs when

Chemistry
1 answer:
ELEN [110]3 years ago
8 0

Answer:

Not positive but i think its when we burn fossil fuels.

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Could someone help me!<br><br> Consider a cup made of plastic. What are the pros of using plastic?
lozanna [386]

Answer:

It's cheap to make, and its recyclable

3 0
3 years ago
A stock solution of sodium sulfate NaSO4 has a concentrate of 1.00 m. The volume of this solution is 50 ml. What volume of 0.25
mylen [45]
<h3>Answer:</h3>

200 mL

<h3>Explanation:</h3>

Concept tested: Dilution formula

We are given;

  • Concentration of stock solution as 1.00 M
  • Volume of the stock solution as 50 mL
  • Molarity of the dilute solution as 0.25 M

We are required to calculate the volume of diluted solution;

  • The stock solution is the original solution before dilution while diluted solution is the solution after dilution.
  • Using the dilution formula we can determine the volume of diluted solution;

M1V1 = M2V2

Rearranging the formula;

V2 = M1V1 ÷ M2

     = (1.00 M × 50 mL) ÷ 0.25 M

     = 200 mL

Therefore, a volume of 200mL of 0.25 M solution could be made from the stock solution.

5 0
3 years ago
How many moles of oxygen are in 1 mole of Pb(SO4)2
irakobra [83]
The answer to the question is Eight
4 0
3 years ago
Read 2 more answers
A student makes a mistake while preparing a vitamin C sample for titration and adds the potassium iodide solution twice. How wil
LiRa [457]

The added KI does not have any impact  

The reaction invovles Titration of vitaminc ( Ascorbic acid)

ascorbic acid + I₂ → 2 I⁻  +  dehydroascorbic acid

the excess iodine is free reacts with the starch  indicator, forming the blue-black starch-iodine complex.  

This is the endpoint of the titration. since alreay excess KI is added ( the source of Iodine), it does not have an influence.

Answer B

Hope this helps!

5 0
3 years ago
What is a redox reaction?
Alexandra [31]

Answer:

A reaction in which the oxidation state of one element increases and another decreases

Explanation:

Redox reaction means both oxidation and reduction take place in that reaction.

So when an element oxides its oxidation state increases and when an element reduces its oxidation state decrease.

8 0
2 years ago
Read 2 more answers
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