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Mars2501 [29]
4 years ago
11

What is the definition of chemistry

Chemistry
1 answer:
julia-pushkina [17]4 years ago
5 0
<span>he science that deals with the composition and properties of substances and various elementary forms of matter!</span>
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What is the number of electrons in an atom of scandium
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4 0
3 years ago
The enthalpy of fusion of H2O (s) at its normal melting point is 6.01 kJ/mol. What is the entropy change for freezing 1 mole of
Rom4ik [11]

Answer:

22.01J/Kmol

Explanation:

The parameters given in this question are;

Enthalpy (H) = 6.01 kJ/mol.

Number of moles = 1

Entropy change (S) = ?

The formular relationship between entropy and enthalpy is given as;

ΔS=ΔH/T

Temperature for water at freezing point = 0C + 273 = 273 K (converting to Kelvin)

ΔS = 6.01/273

ΔS = 0.0220kJ/Kmol

ΔS = 0.02201 * 1000 = 22.01J/Kmol

3 0
3 years ago
If there are 7.2 mol of H, how many moles of each do the following compounds are present? H2SO4
serg [7]

7.2 mol H × (1 mol H_2SO_4/2 mol H) = 3.6 mol H_2SO_4

8 0
3 years ago
a. Simazine is an herbicide used on corn, fruit and nut crops, and Christmas trees. This herbicide binds to the electron transpo
VARVARA [1.3K]

Answer:the thylakoid membrane usually has two photosystems that absorbs sunlight;the photosystems 11 and 1 .in the light reaction of photosynthesis,when light energy hits the photosystems,the electrons are boosted to higher energy and pass through the electron Transport chain by electron acceptor molecules until it is used in the formation of ATP and NADPH.

However when simazine is present,electrons can no longer be transferred from one electron acceptor to the other for the reduction of NADP+ to NADPH.

Also since no electron is being transferred,the PS II would not have a need to split water molecules ,which products are more electrons and protons which pass through the thylakoid lumen and creates a proton gradient needed for the production of ATP

Explanation:

6 0
3 years ago
Which hydrocarbon is an unsaturated hydrocarbon?
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The correct answer is option C.

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CH₂=CHCH₂CH₂CH₂CH₃

7 0
3 years ago
Read 2 more answers
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