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3 years ago

How would you quickly determine whether a cleaning

Chemistry

1 answer:

Leona [35]3 years ago

7 0

Answer:

The answer is explained below

Explanation:

If you add dilute HCl (Hydrochloric Acid) to the solution, and you see fizzing, then it is the carbonate. I would recommend doing this under a fume hood, as HCl has a wicked smell, and can make a few people sick to their stomach (however, you probably won't be using 12M concentrated HCl)

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14. Within a single use of the scientific method, which of the following steps can only be performed after data is collected?

Romashka-Z-Leto [24]

A should be the answer.

4 0

3 years ago

What is the pH of a 5.41g of HNO3 in 7L of solution? (mass of HNO3=63.02g)

Svetlanka [38]

Answer:

1.9

Explanation:

Let us call to mind the formula

m/M= CV

Where

m= mass of the solute= 5.41 g

M= molar mass of the solute = 63.02g

C= concentration of the solution (the unknown)

V= volume of the solution = 7L

5.41 / 63.02g = 7C

0.0858= 7C

C= 0.0858/7

C= 0.01226 molL-1

[H^+]= [HNO3]= 0.01226 molL-1

pH= - log [H^+]

pH= -log(0.01226)

pH= 1.9

5 0

3 years ago

A coffee cup calorimeter will not be used to

drek231 [11]

Answer:

Ingles porfavor

Explanation:

8 0

3 years ago

Read 2 more answers

Which of the following types of electromagnetic radiation have higher frequencies than visible light and which have shorter freq

natta225 [31]

Answer:

Higher frequency than visible light - Ultraviolet light, X-rays, and Gamma rays

Lower frequency than visible light - Infrared radiation, microwaves, and Radio waves

Explanation:

The frequencies of electromagnetic radiations vary according to their wavelengths. The relationship between the frequency and wavelength of the waves is expressed such that:

λ = c/f, where λ = wavelength, c = speed of light, and f = frequency.

Thus, there is an inverse relationship between the wavelength and the frequency of electromagnetic waves.

The order of the electromagnetic waves based on their frequency from the lowest to the highest is radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma-rays

Hence, electromagnetic waves with higher frequencies than visible light include ultraviolet light, X-rays, and Gamma rays while those with lower frequencies include Infrared radiation, microwaves, and Radio waves.

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3 years ago

A chemist heats a gas within a sealed, rigid container. Which statement describes the changes that occur in the gas? (1 point)

Assoli18 [71]

When a gas is heated in a sealed container, the gas particles move faster and hit the sides of the container with more force leading to an increase in the pressure of the gas.

An increase in the temperature of a gas increases the collision rate of the molecules of the gas according to the kinetic theory.

With increased kinetic energy, the molecules of the gases collide more frequently with each other and the walls of the container.

The collision creates an increase in the magnitude of pressure inside the container.

More on the kinetic theory of gases can be found here: brainly.com/question/15354399?referrer=searchResults

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3 years ago