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jok3333 [9.3K]
3 years ago
9

Please help I will mark brainy

Chemistry
1 answer:
Artyom0805 [142]3 years ago
3 0

Answer:

the answer is c I took the test

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Hey what's the value of pi till<br>5 digits after decimal​
puteri [66]

Answer:

Pi to 5 decimals is 3.14159-

Brainlist pls!

P.S. It's a repeating number, but you can just put a (-), so that you don't have to type the whole thing out.

4 0
3 years ago
Read 2 more answers
The chemical formula for the initial sample is mnso4·h2o and the chemical formula for the final sample is mnso4. use their molec
sammy [17]
The initial sample has a molecular formula of MnSO₄·H₂O. This molecule is a hydrate as it has a unit of water within its structure for every molecule of MnSO₄. This sample is being dehydrated to remove the water to give.

MnSO₄·H₂O → MnSO₄ + H₂O

MnSO₄·H₂O has a molecular mass of 169.02 g/mol. While MnSO₄ has a molecular mass of 151 g/mol. Water has a molecular mass of 18.02 g/mol. We now can use the ratio of the mass of water to the mass of the initial sample to determine the percentage of each component by mass.

% water by mass:

18.02/169.02 x 100% = 10.7% Water by mass.

% MnO₄ by mass:

151/169.02 x 100% = 89.3% MnSO₄ by mass.

Water makes up 10.7% of the initial mass of MnSO₄·H₂O.
4 0
3 years ago
How many molecules of carbon dioxide and how many molecules of water would be produced from 4 molecules of methane (CH4) reactin
77julia77 [94]

Answer:

4

Explanation:

water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)

7 0
3 years ago
How many isomers are there with the formula c3h4? include both structural and geometric isomers?
sleet_krkn [62]
There are three possible Isomers for Molecular Formula C₃H₄. Isomers are;

                                           1) Propyne

                                           2) Propa-1,2-diene

                                           3) Cyclopropene

Structures of all three isomers are given below.

There are no geometrical isomers for given molecular formula because geometrical isomers are formed in compounds containing double bond with at least two bulky groups at both sp² hybridized carbons. In given isomers, propyne does not contain any double bond, Propa-1,2-diene is symmetrical in nature while cyclopropene is a 3-membered ring. And for cycloalkenes there must be other groups attached to ring other than Hydrogen atom, hence cyclopropene does not contain any other group, so it can not show geometrical isomerism.

7 0
3 years ago
The earth is only several thousands of years old.<br> True<br><br> False
Nadusha1986 [10]

Answer:

FALSE!

Explanation:

It was created millions of years ago.

8 0
3 years ago
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