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2 years ago

The table shows the concentration of a reactant in the reaction mixture over a period of time.

Chemistry

1 answer:

Andrews [41]2 years ago

4 0

The average rate of the reaction over the first 450 seconds -2.2×10⁻³ M/s

<h3>What is speed? </h3>

Speed is defined as the rate of change of the distance moved with time. Mathematically, it can be expressed as:

Speed = distance / time

With the above idea, we can obtain the rate of the reaction as illustrated below:

<h3>How to determine the rate of the reaction over the first 45os</h3>

Change in concentration = 0.8 - 1.8 = -1 M
Time = 450 s
Speed = ?

Rate = Change in concentration / time

Rate = -1 / 450

Rate = -2.2×10⁻³ M/s

Learn more about speed:

brainly.com/question/680492

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Which of the following electron configurations gives the correct arrangement of the four valence electrons of the carbon atom in

Juliette [100K]

Answer:

D) $2s^12p^3$

Explanation:

Carbon.

The electronic configuration is -

$1s^22s^22p^2$

Thus, 2s orbital is fully filled and p orbital can singly filled 3 electrons. Thus, Carbon has 2 singly occupied orbitals.

But in methane, $CH_4$ it forms 4 bonds. So, 1 electron each from 2s orbital jumps to the next orbital in the p subshell.

Thus, the configuration is:-

$1s^22s^22p^2$

Thus, the valence electron configuration is:-

$2s^12p^3$

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2 years ago

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Explanation:

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2 years ago

How to solve 5gNaCl= MolE NaCl

valentinak56 [21]

0.086mole

Explanation:

The problem is very simple. It involves conversion from mass to number of moles of NaCl

What is mole?

A mole is a unit of measuring chemical substances. It is the amount that contains the avogadro's number of particles.

How is it related and can be converted from mass;

Number of moles of a substance = $\frac{mass}{molar mass}$

Since we know the mass, we can find the molar mass and put into this equation;

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

Number of moles of NaCl = $\frac{5}{58.5} =$ 0.086mole

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