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3 years ago

Which of the following substances is a fluid?

Chemistry

1 answer:

Rzqust [24]3 years ago

3 0

Answer:

Air

Explanation:

Air like all gasses, is a liquid. Liquid is a substance that flows freely. Therefore, your answer would be gas.

(1) Though Ice, can melt to become a liquid, its form is still TECHNICALLY a solid.

(2) Sand can form to shape, but it still considered a solid. Sand is a solid because each grain of sand is just a very small solid that can hold its shape

(3) Candles, are a solid even though, like ice, can become a liquid but only for a short amount of time because wax would eventually turn back into a solid.

You might be interested in

What is the mass of 7.50 moles of magnesium chloride, mgcl2?

Natali5045456 [20]

MgCl2 = 1Mg + 2Cl = 1(24.3) + 2(35.45) = 95.2g/1mole
7.50moles MgCl2 x 95.2g MgCl2 = 714g MgCl2

8 0

4 years ago

In which of the following compounds does the carbonyl stretch in the IR spectrum occur at the lowest wavenumber?

klio [65]

Answer:

a. Cyclohexanone

Explanation:

The principle of IR technique is based on the vibration of the bonds by using the energy that is in this region of the electromagnetic spectrum. For each bond, there is a specific energy that generates a specific vibration. In this case, you want to study the vibration that is given in the carbonyl group C=O. Which is located around 1700 cm-1.

Now, we must remember that the lower the wavenumber we will have less energy. So, what we should look for in these molecules, is a carbonyl group in which less energy is needed to vibrate since we look for the molecule with a smaller wavenumber.

If we look at the structure of all the molecules we will find that in the last three we have heteroatoms (atoms different to carbon I hydrogen) on the right side of the carbonyl group. These atoms allow the production of resonance structures which makes the molecule more stable. If the molecule is more stable we will need more energy to make it vibrate and therefore greater wavenumbers.

The molecule that fulfills this condition is the cyclohexanone.

See figure 1

I hope it helps!

4 0

4 years ago

When a reaction has reached equilibrium... A. Q = K B. The rate of the forward reaction and the rate of the reverse reaction are

grin007 [14]

Answer:

The correct answer is option A.

Explanation:

Equilibrium is a state when rate of forward reaction is equal to the rate of backward reaction. The concentration of reactants and products becomes constant at this state.

The ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric coefficients is termed as Equilibrium constant. It is denoted by $K_{eq}$ .

aA + bB $\rightleftharpoons$ cC

$K_{eq}=\frac{[C]^c}{[A]^a[B]^b}$

4 0

3 years ago

4. How many grams are in 54 moles H,O?

Marrrta [24]

Answer:

Explanation:1.8

water molecules.

Explanation:

There are

6.022

molecules in a mole.

There are

18.01528

grams of water per mole of water.

These can be figured out using the concept of moles and molecular weight. I have attached a video that provides a good explanation.

Explanation of moles and molecular weight

Now you have all the information needed to solve the problem.

You start out with 54 grams of water. You want to convert that into molecules, but how can you do that? You can't go directly from grams to molecules because there is no easy unit conversion. However, you can go from grams to moles using

18.01528

grams of water per mole of water.

From there, you can go from moles to molecules using

6.022

molecules in a mole.

A T chart is useful for this kind of problem.

54 g H

1 mol H

18.0152 g H

6.022

molecules

1 mol H

g H

1 mol H

18.0152

g H

6.022

molecules

1 mol H

Notice when you apply this T chart, the units cancel out, leaving molecules in the final answer, which is the correct units.

Now actually multiply everything out

6.022

18.0152

1.805

You are left with

1.8

water molecules (rounded to two sig figs).

8 0

4 years ago

Read 2 more answers

HELP ME PLEASE !!! I.D.K WHAT TO DO :((( Will mark brainliest please !!

Svetradugi [14.3K]

I’m sorry but where’s the worksheet lol......

7 0

3 years ago

Read 2 more answers