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Softa [21]
3 years ago
12

Compared to a 0.1 M aqueous solution of NaCl, a 0.8 M aqueous solution of NaCl has a

Chemistry
1 answer:
Fudgin [204]3 years ago
3 0
The correct answer is option 2. A 0.8 M aqueous solution of NaCl has a higher boiling point and a lower freezing point than a 0.1 M aqueous solution of NaCl. This is explained by the colligative properties of solutions. For the two properties mentioned, the equation for the calculation of the depression and the elevation is expressed as: ΔT = -Km and <span>ΔT = Km, respectively. As we can see, concentration and the change in the property has a direct relationship.</span>
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The density of liquid mercury is 13.6 g/mL. What is its density in units of lb/in​3​? (2.5 cm+1 in., 2.205 lbs= 1 kg., 1000 g =1
shusha [124]

Answer:

Density, \rho=0.49\ lb/in^3

Explanation:

It is given that the density of liquid mercury is 13.6 g/mL. We need to convert the density into lb/in³.

We know that,

2.205 lbs= 1 kg

1 g = 0.0022 lb

1 mL = 0.0610 in³

13.6\ \dfrac{g}{mL}=13.6\times \dfrac{0.0022\ lb}{0.0610\ in^3}\\\\=0.49\ lb/in^3

So, the density of liquid mercury is 0.49\ lb/in^3.

3 0
3 years ago
Please solve 13<br> Please
Ymorist [56]

Answer:

1.126 M

Explanation:

From the question given, we obtained the following:

Mass of LiBr = 98g

Volume = 1 L

Molarity of LiBr =?

Next, we'll determine the number of mole of LiBr. This is illustrated below:

Molar Mass of LiBr = 7 + 80 = 87g/mol

Mass of LiBr = 98g

Number of mole = Mass/Molar Mass

Number of mole of LiBr = 98/87

Number of mole of LiBr = 1.126 mole

Now, we can calculate the molarity of LiBr. This is illustrated below:

Molarity is defined as mole per unit litre of the solution. Mathematically, it is represented as:

Molarity = mole /Volume

Mole of LiBr = 1.126 mole

Volume = 1 L

Molarity of LiBr =?

Molarity of LiBr = 1.126 mole /1 L

Molarity of LiBr = 1.126 M

7 0
2 years ago
A student needs to conduct a reaction that combines chemicals a and b to synthesize product ab. if we write this as a chemical e
balu736 [363]
The concept used here is the Law of Conservation of Mass. Technically, it's more specifically included in the Law of Definite Proportions. According to Dalton's atomic theory, when substances react together, they form a compound that has the same fixed ratio of the individual elements. That is the main reason why we balance, because stoichiometric coefficients are essential to obey the Law.

For the reaction a + b ⇒ ab, this is a combination reaction. For every 1 mole of a and 1 mole of b, 1 mole of product ab is formed. This is the fixed ratio we have to follow: 1:1:1. Now, the next thing to note is the limiting and excess reactant. If initially, there are 2 moles of A and 3 moles of B, the limiting reactant is A and the excess is B. Since the ratio between reactants is 1:1, 3 moles of B requires 3 moles of A. But since only 2 moles are available, reactant A is limited. In this problem, we assume that B is provided in excess. So, we just focus on the amount of the limiting reactant a.

If there are 5,000 molecules of a, we can determine the molecules of ab using the fixed ratio, 1 part a is to 1 part ab. Then, that means that 5,000 molecules of a would yield also 5,000 molecules of ab.                                                                                         
7 0
2 years ago
Using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid
Umnica [9.8K]

Answer: Gas

Explanation: Because to check temperature of a room you use a gas in then room

5 0
2 years ago
Select which of the following is a major disadvantage of using nuclear power to generate electricity.
mixer [17]

Answer:

The power plants

are inexpensive to build

6 0
2 years ago
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