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3 years ago

Place the following substances in the following order: soluble, somewhat soluble, and insoluble.

1 answer:

8 0

C- Sugar is very much soluble (example- putting sugar in tea), sand is definately not soluble (example- a sandy beach) and cornstarch is the last one, so logically it should be somewhat soluble.

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What is the mass of 2.9 moles of calcium? Explain please

Alik [6]

Answer:

116 g

Explanation:

From the question given above, the following data were obtained:

Number of mole of calcium = 2.9 moles

Mass of calcium =.?

The mole and mass of a substance are related according to the following formula:

Mole = mass / molar mass

With the above formula, we can obtain the mass of calcium. This can be obtained as follow:

Number of mole of calcium = 2.9 moles

Molar mass of calcium = 40 g/mol

Mass of calcium =.?

Mole = mass / molar mass

2.9 = mass of calcium / 40

Cross multiply

Mass of calcium = 2.9 × 40

Mass of calcium = 116 g

Therefore, the mass of 2.9 moles of calcium is 116 g.

4 0

3 years ago

A small, hard-shelled fossil that resembles a modern-day ocean organism was found

Paul [167]

Answer:

The desert was one covered by ocean water.

Explanation:

5 0

3 years ago

For which process would the pictured cell be used?

DaniilM [7]

Answer:

Coating a material with metal

(SInce the glasses will be coated with gold.)

3 0

2 years ago

If a 1.00 mL sample of the reaction mixture for the equilibrium constant experiment required 32.40 mL of 0.258 M NaOH to titrate

andrey2020 [161]

Answer:

The concentration of acetic acid is 8.36 M

Explanation:

Step 1: Data given

Volume of acetic acid = 1.00 mL = 0.001 L

Volume of NaOH = 32.40 mL = 0.03240 L

Molarity of NaOH = 0.258 M

Step 2: The balanced equation

CH3COOH + NaOH → CH3COONa + H2O

Step 3: Calculate the concentration of the acetic acid

b*Ca*Va = a*Cb*Vb

⇒with b = the coefficient of NaOH = 1

⇒with Ca = the concentration of CH3COOH = TO BE DETERMINED

⇒with Va = the volume of CH3COOH = 1.00 mL = 0.001L

⇒with a = the coefficient of CH3COOH = 1

⇒with Cb = the concentration of NaOH = 0.258 M

⇒with Vb = the volume of NaOH = 32.40 mL = 0.03240 L

Ca * 0.001 L = 0.258 * 0.03240

Ca = 8.36 M

The concentration of acetic acid is 8.36 M

6 0

3 years ago

Concentrated sulfuric acid (18.3 M) has a density of 1.84 g/mL.

lianna [129]

The number of mole sulphuric acid in each mL of solution is 0.0183 mol/mL.

<h3>What is concentration?</h3>

Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume.
Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.
Any type of chemical mixture can be referred to by the term "concentration," however solutes and solvents in solutions are most usually mentioned.
There are different types of molar (quantity) concentration, including normal concentration and osmotic concentration.

<h3>How is concentration determined?</h3>

Subtract the solute's mass from the total volume of the solution. Using m as the solute's mass and V as the total volume of the solution, write out the equation C = m/V.
To get the concentration of your solution, divide the mass and volume figures you discovered and plug them in.

Learn more about concentration here:

brainly.com/question/13872928

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6 0

2 years ago