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pogonyaev
3 years ago
14

Can someone please answer my questions it’s urgent!

Chemistry
2 answers:
Luden [163]3 years ago
8 0
Yes, give me the question.
marysya [2.9K]3 years ago
6 0

Answer: Sure.... whats the question

Explanation:

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A nut cracker is second lever. Give reason.​
muminat

Answer:

the load is between the fulcrum and the handle

Explanation:

4 0
3 years ago
Erica is working in the lab. She wants to remove the fine dust particles suspended in a sample of oli. What method is she most l
patriot [66]

Erica is likely to use reverse osmosis process.it is the method used in the industry to treat water in oil and gas industry .or ultra filtration method is also employed

7 0
3 years ago
Read 2 more answers
Calculate the amount in moles and grams of KMnO4 present in 3dm^3 of 0.25M​
Stels [109]

Answer:

Number of moles   = 0.75 mol

Mass = 118.5 g

Explanation:

Given data:

Number of moles of KMnO₄ = ?

Mass in gram = ?

Molarity of KMnO₄ = 0.25 M

Volume of KMnO₄ solution = 3 dm³ (3 L)

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles  / L of solution

0.25 M = number of moles / 3 L

Number of moles   = 0.25 M× 3 L

            M = mol/L

Number of moles   = 0.75 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 0.75 mol × 158 g/mol

Mass = 118.5 g

5 0
3 years ago
What is the volume of 1.8 moles of O2?
liubo4ka [24]

Answer:

33.6 i think

Explanation:

8 0
3 years ago
Read 2 more answers
What is the mass in grams
natka813 [3]

Answer:

the mass of one mole of an element, or Avogadro's number (6.02 x 1023) of atoms, is equal to its atomic mass in grams. In other words, 1 amu = 1 gram/mole. So if the mass of one hydrogen atom is 1 amu, the mass of one mole of hydrogen is 1 gram.

Explanation:

6 0
3 years ago
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