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xeze [42]
3 years ago
12

Which of the following increases the reaction rate? A. Adding a catalyst to the reaction mixture B. Increasing the size of solid

reactant particles C. Lowering the pressure of gaseous reactants D. Adding an inert gas to the reaction mixture
Chemistry
1 answer:
pickupchik [31]3 years ago
7 0
A. Adding a catalyst. A catalyst by definition is a compound that speeds up reaction rates.
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If 3 g of element C combine with 8 g of element D to form compound CD, how many grams of D are needed to form compound CD2?
bija089 [108]
<span>For the answer to the question above,
If 3g of element combines with 8g of D to form CD it means
1 mole of C = 3g
1 mole of D = 8g
hence it forms CD.
So to form CD2 you need 16g of element D
I hope my answer helped you</span>
8 0
3 years ago
The table below shows the number of sub-atomic particles in an atom of magnesium.
Fittoniya [83]

Answer:

24

Explanation:

7 0
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What are this element’s chemical and physical properties? Explain how the chemical properties affect the physical properties of
Setler79 [48]

Answer:

What element is this. Would you mind inserting a picture or naming the element in the comments section

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3 years ago
Explain the difference between biotic and abiotic
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Biotic are living organisms and abiotic are non living things such as rocks water soil
7 0
3 years ago
The bond dissociation energy to break 4 bond(s) in 1 mole of CH₄ molecules is:_____ **Any help would be greatly appreciated!**
frozen [14]

Answer:

The bond dissociation energy to break 4 bonds in 1 mol of CH is 1644 kJ

Explanation:

Since there are 4 C-H bonds in CH₄, the bond dissociation energy of 1 mol of CH₄ is 4 × bond dissociation energy of one C-H bond.

From the table one mole is C-H bond requires 411 kJ, that is 411 kJ/mol. Therefore, 4 C-H bonds would require 4 × 411 kJ = 1644 kJ

So, the bond dissociation energy to break 4 bonds in 1 mol of CH₄ is 1644 kJ

5 0
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