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3 years ago

Using the periodic table, elaborate the difference between the number of electrons in an oxygen-16 atom and an oxygen-18 atom.

Chemistry

2 answers:

tensa zangetsu [6.8K]3 years ago

6 0

Answer:

the answer is d because the The number of electrons are the same for all isotopes of an element. Hope this helped :)

Explanation:

Butoxors [25]3 years ago

5 0

The correct answer here is D
Have a nice day :)

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The conversation of cyclopropane to propene in the gas phase is a first order reaction with a rate constant of 6.7x10-⁴s-¹. a) i

Rus_ich [418]

Answer: a) The concentration after 8.8min is 0.17 M

b) Time taken for the concentration of cyclopropane to decrease from 0.25M to 0.15M is 687 seconds.

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

a) concentration after 8.8 min:

$8.8\times 60s=\frac{2.303}{6.7\times 10^{-4}s^{-1}}\log\frac{0.25}{a-x}$

$\log\frac{0.25}{a-x}=0.15$

$\frac{0.25}{a-x}=1.41$

$(a-x)=0.17M$

b) for concentration to decrease from 0.25M to 0.15M

$t=\frac{2.303}{6.7\times 10^{-4}s^{-1}}\log\frac{0.25}{0.15}\\\\t=\frac{2.303}{6.7\times 10^{-4}s^{-1}}\times 0.20$

$t=687s$

7 0

3 years ago

A saturated solution can become supersaturated under which of the following conditions

Kaylis [27]

the answer is d. when more solute is added

5 0

3 years ago

1. Explain why the cold water and hot water in Part 1 moved the way they did within the tub of

neonofarm [45]

Answer:

Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. <u>Cold water is more dense and will sink in room-temperature water.</u>

<u></u>

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3 years ago

If 45.6 g of Fe2O3 reacts with excess water, how much heat is required?

tangare [24]

Explanation:

have not yet learnt chemistry so sorry

8 0

3 years ago

Read 2 more answers

Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.

ad-work [718]

Answer:

4.62

so 5

the ratio is 2 na chlorates for 3 O2 so multiply 7 by 2/3

Explanation:

4 0

3 years ago