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4 years ago

When seawater evaporates the concentration of salts increases until

Chemistry

2 answers:

Valentin [98]4 years ago

5 0

Water go through areas of high to low concentration in this case osmosis.

sesenic [268]4 years ago

4 0

The salts precipitate out of the solution

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In lab, a student observes an unknown substance dissolve in water and its mass remains the same. Which law is the student thinki

balu736 [363]

The law which this student is thinking of is the law of conservation of mass (LOCOM).

<h3>What is LOCOM?</h3>

LOCOM is an abbreviation for the law of conservation of mass and it states that mass is neither created nor destroyed in any chemical reaction.

This ultimately implies that, the mass of any substance in a balanced chemical equation or chemical reaction would remain the same at the end.

According to the law of conservation of mass (LOCOM), the mass of all the reacting chemical elements of any substance must be equal (remain the same) to the mass of the product formed during a chemical reaction.

Read more on LOCOM here: brainly.com/question/24783543

3 0

3 years ago

Given: 36.7 grams of CaF2 is added to 300 mL water. Find molarity?

BigorU [14]

<h3>Answer:</h3>

2 M

<h3>General Formulas and Concepts:</h3>

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Chemistry

Unit 0

Reading a Periodic Table
Using Dimensional Analysis

Aqueous Solutions

Molarity = moles of solute / liters of solution

<h3>Explanation:</h3>

Step 1: Define

36.7 g CaF₂

300 mL H₂O

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Molar Mass of F - 19.00 g/mol

Molar Mass of CaF₂ - 40.08 + 2(19.00) = 78.08 g/mol

1000 mL = 1 L

Step 3: Convert

Solute

Set up: $\displaystyle 36.7 \ g \ CaF_2(\frac{1 \ mol \ CaF_2}{78.08 \ g \ CaF_2})$
Multiply: $\displaystyle 0.470031 \ mol \ CaF_2$

Solution

Set up: $\displaystyle 300 \ mL \ H_2O(\frac{1 \ L \ H_2O}{1000 \ mL \ H_2O})$
Multiply: $\displaystyle 0.3 \ L \ H_2O$

Step 4: Find Molarity

Substitute [M]: $\displaystyle x \ M = \frac{0.470031 \ mol \ CaF_2}{.3 \ L \ H_2O}$
Divide: $\displaystyle x = 1.56677 \ M$

Step 5: Check

Follow sig fig rules and round. We are given 1 sig fig as our lowest.

1.56677 M ≈ 2 M

8 0

3 years ago

If the frequency of a wave is small the wavelength would be _____, and the energy would be______.

nignag [31]

Answer:

A or B

Explanation:

because the more times that the waves pass a certain distance in a certain time the smaller the wave will be. so the more waves that fit in it the shorter the wavelength.

6 0

4 years ago

What are desirable characteristics of a barium suspension? 1. Rapid flow 2. Thick layering 3. Good mucosal adhesion

choli [55]

Answer:

The desirable characteristic of Barium suspension are:

Thick layering

Explanation:

First know the meaning of the terms :

1. Rapid flow

2. Thick layering

3. Good mucosal adhesion\

1. Rapid flow : The lower the viscosity of the solution , more is its flow in the solution. For example : Honey has more viscosity so it flows slowly . On the other hand water flow faster.

2. Thick layering : layering is the deposition of one layer of the liquid over other. The deposited layer can be of different substance.

3. Mucosal Adhesion : It is the adhesion(attraction) between two materials ,one of which is mucous.It is attractive force between the drug and the mucus inside the body.

Barium suspension:

It is not a Good mucosal adhesion material because of low solubility in water and lipid .

Only those solution are good in adhesion which have higher solubility in water.

It is widely used as the contrast media for the examination of gastrointestinal because of its Thick Layering Property. It has the consistency of thick glass . At room temperature it is called "warm thick milk"

3 0

3 years ago

Why don't rockets need air to stay up, like planes do?

forsale [732]

Part of a rocket's propulsion system includes a chemical oxidizer, either in the form of liquid oxygen, the solid ammonium perchlorate, or the propulsion/oxidizer mixture Hydrazine. No outside source of oxygen is needed.

Steering is accomplished by "gimbaled" rocket nozzles which change the direction of the blast to keep the rocket on course. Once in space and in orbit, slight changes in orientation is made by small rockets placed around the craft that spurt little gas jets to nudge the craft into the desired position.

7 0

3 years ago