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3 years ago

1. Find the density of an object that has a mass of 8.2 grams and a volume of 3 cc.

1 answer:

8 0

The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

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What amounts to use in sulfur foods?

coldgirl [10]

Answer:

Allium vegetables. Even if you haven't heard the term “allium” before, you're probably a lot more familiar with these vegetables than you think!

Explanation:

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4 years ago

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An aqueous solution of nitric acid is standardized by titration with a 0.110 M solution of calcium hydroxide. If 21.1 mL of base

Mumz [18]

Answer:

$\large \boxed{\text{0.195 mol/L}}$

Explanation:

(a) Balanced equation

2HNO₃ + Ca(OH)₂ ⟶ Ca(NO₃)₂ + 2H₂O

(b) Moles of Ca(OH)₂

$\text{Moles of Ca(OH)}_{2} = \text{21.1 mL Ca(OH)}_{2} \times \dfrac{\text{0.110 mmol Ca(OH)}_{2}}{\text{1 mL Ca(OH)}_{2}}\\= \text{2.321 mmol Ca(OH)}_{2}$

(c) Moles of HNO₃

The molar ratio is 2 mol HNO₃:1 mol Ca(OH)₂

$\text{Moles of HNO}_{3} = \text{2.321 mmol Ca(OH)}_{2} \times\dfrac{\text{2 mmol HNO}_{3}}{\text{1 mmol Ca(OH)}_{2}}= \text{4.642 mmol HNO}_{3}$

(d) Molar concentration of HNO₃

$c = \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c = \dfrac{n}{V}\\\\c= \dfrac{\text{4.642 mmol}}{\text{23.8 mL}} = \text{0.195 mol$\cdot$L$^{-1}$}\\\\\text{The molar concentration of the Ca(OH)$_{2}$ is $\large \boxed{\textbf{0.195 mol/L}}$}$

8 0

4 years ago

State 3 differences between a solution, suspension and colloid.

Art [367]

Explanation:

solution 1) homogeneous

2) do not scatter light

3) cannot be separated by filtration

Colloids 1) heterogeneous

2) scatter light

3) cannot be separated by filtration

suspension 1) heterogeneous

2) may either scatter light or be opaque

3) can be separated by filtration

8 0

3 years ago

I need help badly<br> what is the individual element that make up HCI

maxonik [38]

Answer:

It is two elements, Hydrogen and Chlorine

Explanation:

Hydrochloric Acid is made with 1 hydrogen atom and 1 chlorine atom bonded with a single covalent bond

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3 years ago

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PLEASE HELP??<br> Describe how the periodic table differentiates between metals and nonmetals.

Dovator [93]

Metals are the majority of the periodic table. Also, they are on the left side of the periodic table. The no metals are on the right side of periodic table.
Hope I Helped!

4 0

3 years ago