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3 years ago

8 ptsEasy question Pls answer

Chemistry

1 answer:

Scilla [17]3 years ago

6 0

Answer:

I think you can predict it by the number of protons in it.

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Convert to scientific notation : 520,000,000

PIT_PIT [208]

Answer:

5.2 x 10^8

Explanation:

3 0

3 years ago

Read 2 more answers

Which of the following substances can be used to neutralize HF?

Artemon [7]

Answer:

option (D) NaOH is right answer

4 0

3 years ago

A solid mixture consists of 47.6g of KNO3 (potassium nitrate) and 8.4g of K2SO4 (potassium sulfate). The mixture is added to 130

IgorLugansk [536]

<u>Answer:</u> No crystals of potassium sulfate will be seen at 0°C for the given amount.

<u>Explanation:</u>

We are given:

Mass of potassium nitrate = 47.6 g

Mass of potassium sulfate = 8.4 g

Mass of water = 130. g

Solubility of potassium sulfate in water at 0°C = 7.4 g/100 g

This means that 7.4 grams of potassium sulfate is soluble in 100 grams of water

Applying unitary method:

In 100 grams of water, the amount of potassium sulfate dissolved is 7.4 grams

So, in 130 grams of water, the amount of potassium sulfate dissolved will be $\frac{7.4}{100}\times 130=9.62g$

As, the soluble amount is greater than the given amount of potassium sulfate

This means that, all of potassium sulfate will be dissolved.

Hence, no crystals of potassium sulfate will be seen at 0°C for the given amount.

7 0

3 years ago

3,3-dibromo-4-methylhex-1-yne

mel-nik [20]

Explanation:

<h2>see the attachment. hope it will help you... </h2>

5 0

4 years ago

Which equation was used by Albert Einstein to explain the photoelectric effect? [E = energy, h = Planck’s constant, and v = freq

devlian [24]

Answer:

E = hV

Explanation:

Hello,

Photo electric effect theory was borne out the the confusing if light was either a particle or a wave. However Albert Einstein came up with a theory that light was a particle and each particle carry a certain amount of energy referred to as photons.

He used Max Planck's idea and theorized that since light is made up of photon, when each photon comes in contact with the surface of a metal, the energy is transferred to the electron.

E = hv

E = energy of the photons

h = Planck's constant = 6.626×10⁻³⁴Js

v = frequency of the photon in Hz

4 0

3 years ago

8 ptsEasy question Pls answer​

8 ptsEasy question Pls answer