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3 years ago

11

What happens when a catalyst is used in a chemical reaction? The reaction rate increases. The reaction rate decreases. The react

ion rate does not change. The reaction process decreases.

2 answers:

topjm [15]3 years ago

8 0

Catalysts speed up a reaction so it would be the reaction rate increases.

FinnZ [79.3K]3 years ago

4 0

reaction rate increases. is the answer

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16. Which element has th17. Magnesium, Mg, tends to form a +2 ion. Which will have the larger atomic radius? Mg or Mg2+ (Explain

SashulF [63]

Answer:

Th is the symbol for element Thorium.

Mg is magnesium while Mg 2+ is magnesium Ion. Judging from periodic trends, atomic radius is one half the distance between the atoms of two covalently bonded atoms. It decreases as elevtrons are added to valence shells. That means, across the period it increases and down the group it decreases. Making Mg2+ smaller.

Electronegativity is the energy needed to take an electron in the gaseous state. Florine is more electron negative that lithium. It increases across the period and decreases down the group. Except in the Noble group.

Explanation:

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3 years ago

State the name of the ion which is oxidised in the following half equations. Cathode: Na+ + e– → Na Anode: 2Cl– → Cl2 + 2e–

jenyasd209 [6]

Answer:

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Explanation:

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2 years ago

Is the soup saturated with salt at 20°C? Explain why or why not.

yKpoI14uk [10]

The salt doesn't dissolve at that temperature. heating aids in dissolving

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2 years ago

7. How many moles are in 18.00 x 1023 particles of AICIZ?

Andrej [43]

Answer:

<h3>The answer is option A</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{18.0 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{18}{6.02} \\ = 2.99003322...$

We have the final answer as

<h3>2.99 moles</h3>

Hope this helps you

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2 years ago

Element a and element b have bonded and formed compound ab. which of the following statements is true? compound ab has chemical

natima [27]

It's either a or b.....

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3 years ago