Copper metal of 1.23 g sample is reacted completely with chlorine gas to produce 2.61 g of copper chloride. Determine the empirical formula of the compound?

The empirical formula of the compound is

Explanation:

Mass of Copper (Cu) = 1.23 g

Mass of Chlorine (Cl)  = Mass of copper chloride - mass of copper = (2.61 - 1.23) g = 1.38 g

Step 1 : convert given masses into moles

Moles of Cu =

Moles of Cl =

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Cu =

For Cl =

The ratio of Cu : Cl = 1 : 2

Hence the empirical formula is

beta decay is the answer

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.