All categories

2 months ago

What is the molarity of 200 ml of solution in which 2.0 moles of sodium bromide is dissolved?

2 answers:

7 0

Molarity is calculated using moles divided by the volume in liters. Convert 200 mL to 0.2 L, then divide 2 moles by 0.2 L.

KiRa [2.9K]2 months ago

4 0

Answer:

The solution's molarity is determined to be 10M.

Explanation:

Molarity refers to the amount of solute in moles per liter of total solution.

$Molarity=\frac{moles solute}{L solution}$

First, convert the given volume from milliliters to liters.

$2.00mL*\frac{1L}{1000mL} =0.2L$

Next, substitute the values into the molarity formula:

Molarity = $\frac{2.0moles}{0.2L} \frac{of sodium bromide}{of solution}$

Molarity = 10M

You might be interested in

Classify each of these soluble solutes as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. Solutes Formula Hydroch

VMariaS [2998]

Answer:

The categorization of strong, weak, and non-electrolytes is detailed below, based on the examples presented in the question.

Explanation:

A strong electrolyte fully dissociates or nearly so in an aqueous environment; typically, strong acids, bases, and salts fall under this category. Examples of strong electrolytes include:

Hydrochloric acid, HCl
Calcium hydroxide, Ca(OH)2
Potassium chloride, KCl

A weak electrolytepartially ionizes in solution; weak acids and bases are primary instances. Examples consist of:

Methylamine, CH3NH2
Hydrofluoric acid, HF

A non-electrolytedoes not dissociate in an aqueous medium. Examples of non-electrolytes are:

Sucrose, C12H22O11
Methanol, CH3OH

5 0

2 months ago

Read 2 more answers

The table lists the lattice energies of some compounds. Compound Lattice Energy (kJ/mol) LiF –1,036 LiCl –853 NaF –923 KF –821 N

KiRa [2933]

Response: Option A) The lattice energy rises as cations become smaller, as demonstrated by LiF and KF.

Clarification: It has been observed that the lattice energy is largely determined by two primary factors regarding ionic solids:

i) The ionic charges - An increase in the charge of the ions corresponds to an increase in lattice energy.

and

ii) The size or radius of the ions - As the ionic size grows, the lattice energy diminishes accordingly.

Therefore, in this context, the latter factor is evident. Thus, it can be concluded that as cation sizes decrease among ionic solids, the lattice energy increases.

7 0

1 month ago

Read 2 more answers

The concentration of Si in an Fe-Si alloy is 0.25 wt%. What is the concentration in kilograms of Si per cubic meter of alloy?

KiRa [2933]

Answer: The mass of Si in kilograms is, $19.55kg/m^3$

Explanation:

Given that the Si concentration in an Fe-Si alloy is 0.25 weight percent, this translates to:

Mass of Si = 0.25 g = 0.00025 kg

Mass of Fe = 100 - 0.25 = 99.75 g = 0.09975 kg

Density of Si = $2.32g/cm^3=2.32\times 10^6g/m^3$

Density of Fe = $7.87g/cm^3=7.87\times 10^6g/m^3$

Next, we need to find the quantity of Si in kilograms per cubic meter of alloy.

Si concentration in kilograms = $\frac{\text{Weight of Si in 100 g of alloy}}{\text{Volume of 100 g of alloy}}$

Si concentration in kilograms = $\frac{\text{Weight of Si in 100 g of alloy}}{\frac{\text{Wight of Fe}}{\text{Density of Fe}}+\frac{\text{Wight of Si}}{\text{Density of Si}}}$

By substituting all the provided values into this formula, we arrive at:

Si concentration in kilograms = $\frac{0.00025kg}{\frac{99.75g}{7.87\times 10^6g/m^3}+\frac{0.25g}{2.23\times 10^6g/m^3}}$

Si concentration in kilograms = $19.55kg/m^3$

Hence, the mass of Si in kilograms is, $19.55kg/m^3$

5 0

2 months ago

32.7 grams of water vapor takes up how many liters at standard temperature and pressure (273 K and 100 kPa)?

alisha [2963]

At standard temperature and pressure, it is established that 1 mole of gas has a volume of 22.4 liters.

According to the periodic table:
the molar mass of oxygen is 16 g
and the molar mass of hydrogen is 1 g
Hence, the molar mass of water vapor is calculated as 2(1) + 16 = 18 g

Thus, 18 g of water occupies 22.4 liters, therefore:
the volume for 32.7 g is (32.7 x 22.4) / 18 = 40.6933 liters

5 0

2 months ago

Which statement explains why nuclear waste materials may pose aproblem?(1) They frequently have short half-lives and remain radi

castortr0y [3046]

Because they often have long half-lives, their radioactive persistence in the environment is lengthy.

Number 4

If you spot any errors in my English, please tell me, since I am not a native speaker.

6 0

1 month ago

Read 2 more answers