The mass of 2 cm3 of gold is 38.6 grams. find the density of the gold. Could you please help me??

Answers

Answer 1

Answer: Density = Mass / Volume
so, Density of gold = 38.6/2 = 19.3

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Answers

I'm not going toblie I'm stuck with A and B.But to me my gut says A

A substance that speeds up the rate of a chemical reaction is called a catalyst. As a catalyst speeds up the reaction, as an enzyme does.

What are the 3 main types of mixtures

Answers

Answer: Suspension mixture, colloidal mixture, and solution mixture

Explanation: These are the three types of mixtures, hopefully this helps.

A 125 mL aqueous solution contains 1.86 mc032-1.jpg 10–5 g of potassium chloride and has a density of 1.02 g/mL. What is the concentration in ppm?

Answers

mass of the solvent (H2O) in kg

D = m / V

1.02 = m / 125

m = 1.02 x 125

m = 127.5 g of H2O

127.5 / 1000 => 0.1275 kg

mass of solute in mg:

1000 x ( 1.86 x 10⁻⁵ ) = 0.0186 mg

ppm = mass of solute in mg / mass of solvent in kg

ppm = 0.0186 / 0.1275

= 0.1458 ppm

hope this helps!

Answer:

Explanation:

Consider the group 1A elements sodium (period 3), potassium (period 4), and rubidium (period 5). What would you predict about the ionization energies of these elements?

Answers

It can be predicted that the ionization energies of these elements increase as you go up a period. This means that sodium has the greatest ionization energy, while rubidium has the least. This is due to the placement or distance of the valence electrons from the nucleus of these elements. When you go up a period, this distance decreases, making it harder to overcome the attraction between the nucleus and the electrons. The harder it is to overcome this attraction, the higher the ionization energy needed.

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Answers

In determining the boiling point of solutions, always take note of the number of ions that will dissociate in the solution. It does not depend on the nature of the substance. The greater the number of ions dissociated, the greater is the boiling point of the solution.

What is the maximum number of covalent bonds that can be formed by one carbon atom? 1 2 3 4

Answers

The maximum number of covalent bonds formed by a single carbon atom is 4

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