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SashulF [63]
2 years ago
15

What main chemicals are in space?

Chemistry
2 answers:
PolarNik [594]2 years ago
5 0
Hi!

I believe there are 4 main chemicals in space uracil, cytosine, thymine, and pyrimidine :)
PIT_PIT [208]2 years ago
3 0
Helium, hydrogen, dark matter
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If your end product is 1.5 moles of KMnO 4 how many moles of manganese oxide were used in the reaction? The equation for the pro
vovikov84 [41]

Answer:

1.5 moles

Explanation:

The equation of the reaction is given as:

2 MnO2 + 4 KOH + O2 --> 2KMnO 4 + 2KOH + H2

From the equation,

2 moles of MnO2 produces 2 moles of KMnO4

x moles of MnO2 would produce 1.5 moles of KMnO4

2 = 2

x = 1.5

Solving for x;

x = 1.5 * 2 / 2

x = 1.5 moles

4 0
2 years ago
Hydrogenation reactions are used to add hydrogen across double bonds in hydrocarbons and other organic compounds. use average bo
Mamont248 [21]
H2(g) +C2H4(g)→C2H6(g)
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2C -H bonds and one C-C bond are formed while enthalpy change (dH) of the reaction,
H-H: 432kJ/mol
C=C: 614kJ/mol
C-C: 413 kJ/mol
C-C: 347 kJ/mol
dH is equal to sum of the energies released during the formation of new bonds or negative sign, and sum of energies required to break old bonds or positive sign.
The bond which breaks energy is positive.
432+614 =1046kJ/mol
Formation of bond energy is negative
2(413) + 347 = 1173 kJ/mol
dH reaction is -1173 + 1046 =-127kJ/mol 
7 0
3 years ago
Matthew records the temperature outside for one day. From 10:00 a.m. to 12:00 p.m., the temperature rises 4°C. From 12:00 p.m. t
d1i1m1o1n [39]

Answer:will drop 4°c

Explanation:

3 0
3 years ago
Which element has the smallest atomic radius? Fluorine, Iron, Phosphorous, Potassium
Ivahew [28]

Answer:

actually answer should be helium

7 0
3 years ago
Read 2 more answers
What is not a product of modern chemistry ?
Doss [256]

Answer:

Modern chemistry describes the composition, structure, and physical and chemical properties of substances. ... The main aim of modern chemistry is to improve the communication and conversation among the scientists, researchers, engineers, and policymakers, who are working under the area of modern chemistry

Explanation:

I hope this helps you!!

7 0
3 years ago
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