3 years ago

How many kJ of heat are required to melt 35.0 g of ice?

Chemistry

1 answer:

Verizon [17]3 years ago

5 0

The awnser is d bc cause

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An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?

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0.120 m

Explanation:

What you need to know here is that frequency and wavelength have an inverse relationship as described by the equation

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3 years ago

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Vikentia [17]

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water - Yes because the do drink water

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How is a line spectra created from a hot gas? a. photons are emitted when the amount of radioactive material in the gas decrease

fiasKO [112]

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c when electrons drop down from a high energy level they emit a photon.

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1 year ago

2. (2 pts) How would you prepare 1.5 liters of 2 M KCI (MW=74.55 g/mol)

ra1l [238]

Answer:

Dissolve 226 g of KCl in enough water to make 1.5 L of solution

Explanation:

1. Calculate the moles of KCl needed

$n = \text{1.5 L} \times \dfrac{\text{2 mol}}{\text{1 L}}= \text{3.0 mol}$

2. Calculate the mass of KCl

$m = \text{3.0 mol} \times \dfrac{\text{74.55 g}}{\text{1 mol}}= \text{224 g}$

3. Prepare the solution

Measure out 224 g of KCl.
Dissolve the KCl in a few hundred millilitres of distilled water.
Add enough water to make 1.5 L of solution. Mix thoroughly to get a uniform solution.

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3 years ago

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Anna35 [415]

D, the more liquid there is, the less the temperature will be affected

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