How many grams in 5 moles of NaCL?

292.5 g

Explanation:

We know the formula:

No of moles = Mass ÷ Mr of the Compound

We need to find the mass, so make Mass as the subject of the formula.

Mass = No. of moles × Mr of the Compound

We know the no. of moles, as per given in question which is 5 moles.

Find the Mr of NaCl

Mass of Na = 23

Mass of Cl =35.5

Mr of NaCl = 23 + 35.5 = 58.5

Fill in the values in the formula.

Mass = 5 moles × 58.5

Mass = 292.5 g

mention the spill to the teacher clean the area and throw the broken pieces away

explanation:

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.