Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V)
[Ca = 40, N = 14, O = 16]
8.5%
13.1%
17.1%
27.6%
Correct answer is C
No explanation has been provided for this answer.
Which of the following is an example of a mixture?
Common salt
Blood
Sand
Washing soda
Correct answer is B
The Blood is a mixture which consists of water, proteins, fats, oil, sugar, vitamins, hormones, enzymes,e\ etc
Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have?
a single bond
a double bond
a triple bond
an ionic bond
Correct answer is B
In chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond. Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds.
The simplest branched-chain hydrocarbon is
ethane
ethene
propane
butane
Correct answer is D
The smallest branched alkane is isobutane. Notice that isobutane has the same molecular formula, C4H10, as n-butane but has a different structural formula.
The molecular formula of a common organic laboratory anaesthetic is
CHCl3
CHI3
CCl4
CHF3
Correct answer is A
No explanation has been provided for this answer.