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3 years ago

How many atoms are present in 23.0 g of carbon?

Chemistry

2 answers:

Bas_tet [7]3 years ago

4 0

Answer: 6.0225X10^23

Explanation:

Number of atoms in 24g of carbon

We know that Carbon has atomic mass equal to 12g, I. E. One mole of carbon atom weighs 12g. We know that one mole of any substance contains 6.0225X10^23 particles(atoms, molecules, ions, etc.). Thus 12g of Carbon contains 6.0225X10^23 atoms of Carbon

Elza [17]3 years ago

3 0

Answer: 6.0225X10^23

Explanation:

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3 years ago

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What are the differences between a Lewis Structure and a Bohr diagram?

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$\huge\underline\mathbb\pink{ANSWER\::}\\\\$

Bohr's model is one of the ea.rliest model of atom in history, modified from Ruth.erford's model.

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7 0

3 years ago

What is the molality of a solution that has 30mg of K3PO4 dissolved in 40mL of water? (The density of water is 1.00 g/mL)

sweet [91]

Answer:

m = 0.0035 m.

Explanation:

Hello there!

In this case, since the formula for the computation of the molality is:

$m=\frac{n_{solute}}{m_{solvent}}$

We can first compute the moles of solute, K3PO4 by using its molar mass:

$n=30mgK_3PO_4*\frac{1gK_3PO_4}{1000gK_3PO_4}*\frac{1molK_3PO_4}{212.27gK_3PO_4} =1.41x10^{-4}mol$

Next, since the volume of water is 40.0 mL and its density is 1.00 g/mL we infer we have the same grams (40.0 g). Thus, we obtain the following molality by making sure we use the mass of water in kilograms (0.04000kg):

$m=\frac{1.41x10^{-4}mol}{0.0400kg}\\\\m=0.0035m$

In molal units (m=mol/kg).

Best regards!

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3 years ago

Question 1 of 5

aleksandr82 [10.1K]

Answer:
D. 3.844 x 10^5

3.844 is between 1 and 10, so that is correct.
Not C because if it is negative it would be a decimal from 0 e.g -> 0.88

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3 years ago

Write the balanced equation for the neutralization reaction between HCl and Ba(OH)2 in aqueous solution. Include physical states

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2HCl (aq) + Ba(OH)2 (aq) --> BaCl2 (aq) + 2H2O (l)

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4 years ago