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3 years ago

Add the polynomials (7x^3-2x^2-12)+(3x^3-8x^2+10x)

Chemistry

1 answer:

laiz [17]3 years ago

4 0

Answer:

10 x ^3 − 10 x ^2 + 10 x − 12

Explanation:

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Procaine hydrochloride ( MW = 272.77 g/mol) is used as a local anesthetic. Calculate the molarity of a 4.666 m solution which ha

fenix001 [56]

Answer:

$\boxed{\text{2.274 mol/L}}$

Explanation:

$b = \dfrac{\text{moles of solute}}{\text{kilograms of solvent}}$

Assume 1 kg water.

1. Moles of P.HCl

Then we have 4.666 mol of P.HCl

2. Mass of P.HCl

n = 4.666 mol × 272.77 g/mol = 1271.1 g

3. Total mass of solution

m = 1000 g + 1271.1 g = 2271.1 g solution

4. Volume of solution

$V = \text{2271.1 g} \times \dfrac{\text{1 mL}}{\text{1.1066 g}} = \text{2052.3 mL} = \text{2.0523 L}$

5. Molar concentration

$\begin{array}{rcl}c & = & \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c & = & \dfrac{\text{4.666 mol}}{\text{2.0523 L}}\\\\ & = & \text{2.274 mol/L}\\\end{array}\\$

$\text{The molar concentration of the solution is} \boxed{\textbf{2.274 mol/L}}$

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4 years ago

How do chemists identify elements & compounds?

padilas [110]

Chemsits identify elements and compounds by using the Periodic Table. All elements have Atomic Numbers, Chemical Names, Atomic Mass, Period, and are usually colored and put into their group.

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3 years ago

So in general what rule can you make about substances that dissolve in solvent?

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In general, SOLUBILITY is an ability of a substance to dissolve. In the process of dissolving, the substance which is being dissolved is called a solute and the substance in which the solute is dissolved is called a solvent. A mixture of solute and solvent is called a solution.

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3 years ago

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When sodium carbonate is dissolved in water, it doesn’t dissociate, or break up, completely. There is always some sodium carbona

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It's a weak base because weak bases don't dissociate completely. If it did, then it would be a strong base.

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3 years ago

What is the definition of a solution

allsm [11]

A solution means that you're trying to solve (or deal) with a situation.

For example, if you're having trouble trying to solve a math problem, that means that you're trying to figure out that problem.

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4 years ago