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3 years ago

How many grams of potassium chloride are in 4.25 x 1023 molecules?

Chemistry

1 answer:

liubo4ka [24]3 years ago

6 0

Answer:

Nintendo Co., Ltd. is a Japanese multinational consumer electronics and video game company headquartered in Kyoto. The company was founded in 1889 as Nintendo Karuta by craftsman Fusajiro Yamauchi and originally produced handmade hanafuda playing cards

Explanation:

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Which liquid will evaporate more rapidly? Explain your answer in terms of intermolecular forces

Viktor [21]

It was concluded that different liquids do evaporate at different rates, according to the physical properties of the given substance. Nail polish remover vaporized the quickest, followed by water, salt water, vinegar, orange juice and oil.

7 0

1 year ago

Calculate the molarity of a NaOH solution that is prepared by diluting 100mL of 0.20M NaOH with 150mL of H2O.

lianna [129]

Molarity of solution = 0.08 M

<h3>Further explanation </h3>

Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution

$\tt M=\dfrac{n}{V}$

Where

M = Molarity

n = number of moles of solute

V = Volume of solution

mol of NaOH

$\tt mol=0.2~M\times 100~ml=20~mlmol=0.02~mol$

molarity

Volume of solution = 100 ml + 150 ml = 250 ml

$\tt M=\dfrac{0.02~mol}{0.250~L}=0.08$

3 0

2 years ago

Match the following family of elements to its group.

docker41 [41]

Explanation:

To solve this problem, we simply use the periodic table of elements which groups elements based on their atomic numbers.

The atomic number of an element is the number of protons it contains. The protons are the positively charged particles within an atom.

The vertical arrangement of elements on the periodic table is the group.
The horizontal arrangement of elements is the period.

Now;

Noble gases belongs to group 18

Alkali earth metals belongs to group 2

Halogens belongs to group 17

Alkali metals belongs to group 1

Transition metals belongs to group 3-12

7 0

2 years ago

One solution has a formula C (n) H (2n) O (n) If this material weighs 288 grams, dissolves in weight 90 grams, the solution will

saw5 [17]

Explanation:

The given data is as follows.

Boiling point of water ( $T^{o}_{b}) = 100^{o}C$ = (100 + 273) K = 323 K,

Boiling point of solution ( $T_{b}) = 101.24^{o}C$ = (101.24 + 273) K = 374.24 K

Hence, change in temperature will be calculated as follows.

$\Delta T_{b} = (T_{b} - T^{o}_{b})$

= 374.24 K - 323 K

= 1.24 K

As molality is defined as the moles of solute present in kg of solvent.

Molality = $\frac{\text{weight of solute \times 1000}}{\text{molar mass of solute \times mass f solvent(g)}}$

Let molar mass of the solute is x grams.

Therefore, Molality = $\frac{\text{weight of solute \times 1000}}{\text{molar mass of solute \times mass f solvent(g)}}$

m = $\frac{288 g \times 1000}{x g \times 90}$

= $\frac{3200}{x}$

As, $\Delta T_{b} = k_{b} \times molality$

$1.24 = 0.512 ^{o}C/m \times \frac{3200}{x}$

x = $\frac{0.512 ^{o}C/m \times 3200}{1.24}$

= 1321.29 g

This means that the molar mass of the given compound is 1321.29 g.

It is given that molecular formula is $C_{n}H_{2n}O_{n}$ .

As, its empirical formula is $CH_{2}O$ and mass is 30 g/mol. Hence, calculate the value of n as follows.

n = $\frac{\text{Molecular mass}}{\text{Empirical mass}}$

= $\frac{1321.29 g}{30 g/mol}$

= 44 mol

Thus, we can conclude that the formula of given material is $C_{44}H_{88}O_{44}$ .

4 0

2 years ago

What are the contents of a electron cloud?

PilotLPTM [1.2K]

Weast to east , east to west, nort to south, south to nort.

7 0

3 years ago