Deposition refers to a change from the _______ phase to the solid phase.

Chemistry

1 answer:

Harman [31]3 years ago

6 0

Answer is: liquid

It’s gonna be liquid

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The shorter an elecrtomagnetic waves wavelength, the ___

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<h3>Answer:</h3>

The higher is its frequency.

<h3>Explanation:</h3>

Electromagnetic waves are types of waves that do not require a material medium for transmission.
They include radio waves, microwaves, infra-red and gamma rays among others.
Frequency refers to the number of complete oscillations in one second while wavelength is the distance between two successive crests or trough in a transverse wave.
The frequency of electromagnetic waves varies inversely to the wavelength.
Electromagnetic waves with higher frequencies such as x-rays and gamma rays have lower wavelengths.
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3 years ago

Kelly has some sand in a bucket, but she thinks that there may be some salt mixed in with her sand. How can she determine if the

Pie

<span>Kelly has some sand in a bucket, but she thinks that there may be some salt mixed in with her sand. How can she determine if there is salt in the sand?</span><span>

Answer: If she puts water in the bucket, the salt will dissolve.

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3 years ago

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What is the concentration, in m/v percent, of a solution prepared from 50 g NaCl and 2.5 L of solution?

Serjik [45]

When we convert the given mass in grams and volume in liters to m/v percent, we recall that m/v percent is expressed as grams/100 milliliters. In this case the expression becomes (50 grams/ 2500 L)*(0.1L/100ml), that is equal to 0.002 grams/ 100 mL. Hence the the concentration is equal to 0.2 m/v percent.

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Name the following chemical compound.

olya-2409 [2.1K]

A. sulfur dioxide ...................................................

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4 years ago

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How much energy is required to melt a 20.0lb bag of ice a 0°c? A pound (lb.) is equivalent to 0.4536. The Hfusion of ice is +6.0

erma4kov [3.2K]

To compute the energy, Q, needed to melt a certain amount of ice, n, in moles, we have

$Q = n \Delta H_{f}$

where the latent heat of fusion for ice is equal to 6.009 kJ/mol.

Now, since we have a 20.0 lb ice, we must first convert its mass to grams. Thus mass = (20.0)(1000)(0.4536) = 9072 g.

To find the number of moles present, we must recall that the molar mass of water (ice) is equal to <span>1.00794(2) + </span><span>15.9994 </span>≈ 18.01 g/mol. Hence, we have

$ice_{moles} = (\frac{9072 g}{1})(\frac{1 mol}{18.01 g}) =503.72 moles$

Now, to compute for the molar heat of fusion, Q,

$Q = (503.72)(6.009) = 3026.9 kJ$

Therefore, the amount of heat needed to melt the 20-lb bag of ice is equal to 3026.9 kJ.

Answer: 3026.9 kJ

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3 years ago