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4 years ago

When equal volumes of equimolar solutions are combined, the concentration of each solution..?

Chemistry

1 answer:

BabaBlast [244]4 years ago

4 0

Answer:

c. decreases by one half

Explanation:

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Convert to moles: show work

Ket [755]

I’m just letting you know this is really easy you just calculate the molar mass of each compound and divide the amount of the compound (grams) by the molecular Mass

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3 years ago

The number 0.0020 expressed in scientific notation is?

Feliz [49]

Answer: Here's your answer: Therefore, the decimal number 0.0020 written in scientific notation is 2 × 10-3 and it has 2 significant figures. Here are some more examples of decimal to scientific notation 0.00200 in scientific notation

Explanation: Pls mark me brainiest pls

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2 years ago

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For an electron in an atom to change from ground state to an excited state,

barxatty [35]

It must absorb energy in the form of for example heat which gives it the energy required to become excited

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4 years ago

The half-life of a positron is very short. It reacts with an electron, and the masses of both are converted to two gamma-ray pho

sp2606 [1]

Explanation:

(a) It is known that relation between energy and mass is as follows.

$E = 2 \times mc^{2}$

where, E = energy

m = mass

c = speed of light = $3 \times 10^{8}$ m/s

As it is given that mass is $9.109 \times 10^{-31}$ kg. So, putting the given values into the above formula as follows.

$E = 2 \times mc^{2}$

= $2 \times 9.109 \times 10^{-31} kg \times 3 \times 10^{8}m/s$

= $1.638 \times 10^{-13} J$

Therefore, we can conclude that the energy produced by the reaction between one electron and one positron is $1.638 \times 10^{-13} J$ .

(b) When gamma ray photons are produced then they will have the same frequency. Relation between energy and frequency is as follows.

E = $h \times \nu$ ..... (1)

where, h = plank's constant = $6.626 \times 10^{-34} J.s$

$\nu$ = frequency

Also, $E = 2 \times mc^{2}$ ........ (2)

Hence, equating equations (1) and (2) as follows.

$h \times \nu$ = $2 \times mc^{2}$

So,

$6.626 \times 10^{-34} Js \times \nu$ = $1.638 \times 10^{-13} J$

$\nu$ = $1.236 \times 10^{20} Hz$

Thus, we can conclude that the frequency is $1.236 \times 10^{20} Hz$ .

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4 years ago

The appropriate geometric "fixing" of two atoms which is necessary to start chemical rearrangement is called the:

ahrayia [7]

Hello there.

Question: <span>The appropriate geometric "fixing" of two atoms which is necessary to start chemical rearrangement is called the:

Answer: It is called activation complex.
</span><span>
Hope This Helps You!
Good Luck Studying ^-^</span>

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4 years ago

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