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DIA [1.3K]
4 years ago
15

What is the unit for volume?

Chemistry
1 answer:
kondaur [170]4 years ago
5 0

The answer is volume because The base units of length and volume are linked in the metric system. By definition, a liter is equal to the volume of a cube exactly 10 cm tall, 10 cm long, and 10 cm wide. Because the volume of this cube is 1000 cubic centimeters and a liter contains 1000 milliliters, 1 milliliter is equivalent to 1 cubic centimeter.

Hope this helps :)

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Can anyone help me in doing this question?
Alecsey [184]

1. No. 108 g of Ag has a lower number of atoms than 80 g of Ca.

2. The gram of SO_3 in 3 moles of the compound would be 240 g.

3. 1.20 x 10^{24 atoms

4. The grams of hydrogen in 3.6 x 10^{24 molecules of NH_3 would be 18 grams.

<h3>Number of atoms in compounds</h3>

According to Avogadro, 1 mole of a substance contains 6.022 x 10^{23 molecules or atoms.

Recall that: mole = mass/molar mass

1. 108 g of Ag would be equivalent to: 108/108 = 1 mol.

80 g of Ca would be equivalent to: 80/40 = 2 mol

Since 1 mol is equivalent to 6.022 x 10^{23 molecules or atoms, it means 80 g of Ca has twice as atoms as 108 g of Ag.

2. 3 mol sample of SO_3 would be equivalent to: 3 x 80 = 240 g

3. 124 g of Na_2O would be equivalent to: 124/62 = 2 mol

Number of atoms = 2 x 6.022 x 10^{23

                              = 1.20 x 10^{24 atoms

4. 3.6 x 10^{24 molecules of NH_3 would be equivalent to:

  3.6 x 10^{24/6.022 x 10^{23 = 6 mol of NH_3

NH_3 --- > 3H^+ + N^{3-

From the above equation, 1 mole of NH_3 produces 3 moles of hydrogen.  Thus,  6 moles of  NH_3 would be equivalent to 18 moles of hydrogen.

18 moles of hydrogen = 18 x 1

                                    = 18 g

More on the number of atoms in samples can be found here: brainly.com/question/28834341

#SPJ1

5 0
1 year ago
3. According to the label on a bottle of concentrated hydrochloric acid, the contents are 36.0% HCl by mass and have a density o
velikii [3]

Answer:

a) 11.64 M

b) 43 mL

c) 1.7 kg

Explanation:

a) Let's use a basis of the calculus of 1000 mL (1 L) of the concentrated solution. If the solution has 1.18 g/mL, it has:

1.18*1000 = 1180 g.

The mass of HCl will be then:

mHCl = 1180*0.36 = 424.8 g

The molar mass of HCl is 36.5 g/mol, so the number of moles is the mass divided by the molar mass:

nHCl = 424.8/36.5 = 11.64 mol

The molarity is the number of moles divided by the volume in L:

Molarity = 11.64 M

b) To prepare a solution by dilution of a concentrated one, we can use the equation:

C1V1 = C2V2

Where C is the concentration, V is the volume, 1 is the concentrated solution, and 2 the final solution. So:

11.64*V1 = 2.00*0.250

V1 = 0.0429 L ≅ 43 mL

c) The neutralization will happen by the equation:

HCl + NaHCO₃ → NaCl + CO₂ + H₂O

So, 1 mol of NaHCO₃ is needed to react with 1 mol of HCl. At 1.75 L, the number of moles of the acid is:

nHCl = 1.75*11.64 = 20.37 mol

The molar mass of NaHCO₃ is 84 g/mol so the mass needed is the molar mass multiplied by the number of moles:

m = 84*20.37 = 1,711.08 g

m = 1.7 kg

6 0
3 years ago
How can I balance this equation? ____ KClO3→ ____ KCl+ ____ O2
Lana71 [14]
<span>the K and Cl are 1:1 .. the problem is in the O .. you have 3 
(left side) and 2 (right side) .. you multiply the O2 on the right by 3 .. 

KClO3 ---> KCl + 3 O2 

and now you have 6 O on the right and 3 on the left .. so you multiply the KClO3 by 2 .. 

2 KClO3 ---> KCl + 3 O2 

now you have 6 O on both sides .. now balance the K and Cl by multiplying KCl on the right by 2 .. 

2 KClO3 ---> 2 KCl + 3 O2</span><span>
</span>
8 0
3 years ago
According to de Broglie, which of these objects does not have a wavelength?
polet [3.4K]

Answer: Option D is correct.

Explanation: Equation given by de Broglie is:

\lambda =\frac{h}{mv}

where, \lambda = wavelength of the particle

h = Planck's constant

m = mass of the particle

v = velocity of the particle

In option A, football will have some mass and is moving with a velocity of 25 m/s, hence it will have some wavelength.

In Option B, unladen swallow also have some mass and is moving with a velocity of 38 km/hr, hence it will also have some wavelength.

In Option C, a person has some mass and is running with a velocity of 7 m/hr, hence it will also have some wavelength.

As, the momentum of these particles are large, therefore the wavelength will be of small magnitude and hence, is not observable.

From the above, it is clearly visible that all the options are having some wavelength, so option D is correct.

7 0
3 years ago
Which participates in chemical reactions?<br><br> electrons<br> protons<br> neutrons<br> gamma rays
KIM [24]
I think the correct answer is electrons. All chemical reactions are dependent on the transfer of electrons. Other subatomic particles are located in the innermost portion of an atom and are bonded strongly with each other.
4 0
3 years ago
Read 2 more answers
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