Where would the gravitational attraction between the earth and moon be the weakest

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Answer 1

Answer: The gravitational attraction will be the weakest on the side of the Earth that is opposite the Moon.

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What is the total number of electrons in a Cu+ ion?
(1) 28 (3) 30(2) 29 (4) 36

Answers

Answer: The number of electrons in Cu^+ ion is 28.

Explanation: Copper has atomic number of 29 which means it has 29 electrons and 29 protons.

Argon is the noble gas with 18 electrons.

$Cu(29 -[Ar]3d^(10)4s^1$

When Cu lose one electron it forms $Cu^+$ as now the number of protons are greater than the number of electrons.

The configuration of $Cu^+$ becomes $[Ar]3d^(10)$

The total number of electrons in a Cu+ ion is 28.

The Cu+ ion is an ion of copper with a +1 charge. The charge of the ion tells us the number of electrons gained or lost by the atom. Since the ion has a positive charge, it means that it has lost one electron.

The atomic number of copper (Cu) is 29, meaning that a neutral copper atom has 29 electrons. When a copper atom loses one electron to form the Cu+ ion, the total number of electrons in the ion is 29 - 1 = 28.

Learn more about Copper here:

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8.00*10^-5 mol was diluted to 500ml what is the concentration in Mol/L?

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Make sure all units are consistent. Convert ml to L first. (500ml = 0.5L). Then divide the mole by the volume which would result to 1.6*10^-4mol/L. This can also be expressed as interms of molarity (M). 1 M = 1 mol/L hence the final answer is 1.6*10^-4 M.

Answer : The concentration in mol/L is $1.6* 10^(-4)mol/L$

Explanation : Given,

Moles = $8.00* 10^(-5)mol$

Volume of solution = 500 mL

Formula used :

$\text{Concentration}=\frac{\text{Moles of solute}* 1000}{\text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$\text{Concentration}=(8.00* 10^(-5)mole* 1000)/(500mL)=1.6* 10^(-4)mol/L$

Therefore, the concentration in mol/L is $1.6* 10^(-4)mol/L$

How much CaCl2, in grams, is needed to make 2.0 L of a 3.5M solution?

Answers

find the number of moles: 2•3.5=7 moles

and do dimensional analysis. to convert moles of solution to moles of cacl2 and moles of cacl2 to grams of cacl2 (molar mass)

Describe the motion of a ball being thrown straight up in the air in terms of kinetic and potential energy. as the ball rises up and falls back down, how is its kinectic and potential energy affected?

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In your hand, the ball has higher potential energy than kinetic because it is still off of the ground but it isn't moving so there is no kinetic. As the ball rises, its potential and kinetic energy increases. At its peak, it has very high potential energy and very low kinetic energy. As it falls, the potential energy decreases but kinetic does not.

Gay-Lussac's law states:A. The volume of a gas varies inversely with pressure.
B. The volume of a gas varies directly with pressure.
C. The temperature of a gas varies inversely with pressure.
D. The temperature of a gas varies directly with pressure.

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D. The temperature of a gas varies directly with pressure.

That is because temperature has an SI unit of Kelvin, and also deals directly with pressure.

What is the wavelength, in nanometers, of light with an energy content of 1898 kJ/mol ?Express your answer using four significant figures.

Answers

The energy of phton can be determined through the formula E= speed of light * Planck's constant divided by the wavelength of light. Placnk's constant is equal to 6.62607004 × 10-34 m2 kg / s while speed of light is equal to 3x10^8 m/s. Hence, the wavelength of light is 1.0465 x10^-22 nanometers.

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