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WorksheetsEnd of Term Review
Total questions: 18
Worksheet time: 27mins
Why snowflakes always have six sides?
Water molecules form giant covalent structure in hexagonal structure
Water molecules are bonded by hydrogen bonding in hexagonal structure
Water molecules form dipole-dipole forces between molecules in hexagonal structure
An Elf is filling helium balloons for Santa’s grotto. Each balloon takes 325cm3 of helium to fill it. How many moles of helium does one balloon contain?
(a)
Dr Goh receives a crystal kit for Christmas. The kit uses hydrated calcium(II) chloride crystals with the formula CaCl2. XH2O. The mass of hydrated salt in the pack is 6.573g. The anhydrous salt weighs 3.33g. What is the value of X in the formula?
(a)
Mr Ross has been eating sprouts on Christmas day. Each Sprout eaten creates 0.2 g of methane. How many moles of methane is released by consuming 10 sprouts?
(a)
What volume does the methane produced from 10 sprouts (each producing 0.2 g) occupy under standard dining room conditions?
(a)
Mr Sankey is trying to keep his Christmas trees healthy in order to sell them. He makes a fertiliser by reacting ammonia with H3PO4 . Calculate the %N by mass in the fertiliser. Give your answer to the nearest whole number.
(a)
Gold was one of the three gifts given to baby Jesus by the three wise men. Using subshell notation, write out the full electron configuration of gold. Don't worry about using superscripts and use spaces between each subshell. For example, Na would be 1s2 2s2 2p6 3s1
(a)
One of the other gifts was frankincense. Frankincense is a mixture of many compounds, including boswellic acid. The structure of one form of boswellic acid is shown. What type(s) of intermolecular force(s) are present in this molecule?
Van der Waals forces
permanent dipole-dipole interactions
hydrogen bonds
all three of the above
Dr Naughton receives a bottle of whisky for Christmas. It contains 789 g of ethanol per litre. Dr Naughton drinks 400 cm3 over the festive period. How many moles of CH3CH2OH has he consumed?
(a)
How many different chemical compounds are found in chocolate?
3
12
73
600+
1000
Approximately how many chemical compounds are responsible for the aroma of chocolate?
Just 1
Around 5-10
Around 25-50
Around 100
Around 500
Gingerol is responsible for the ___ in gingerbread.
pungency of the flavor
sweetness of the flavor
color
texture
Which compound in candy canes is responsible for the cooling effect?
Sucrose
Corn starch
Water
Menthol
Tyramine (found in mistletoe) may cause...
nausea & vomiting
kissing
headache
mood improvement
What happens if you accidentally drip D-limonene oil from an orange peel near a candle?
It shoots out a jet of flame.
The candle extinguishes.
Nothing happens at all.
An angel gets its wings.
Wrapping paper and tape are both made of essentially the same thing. What is the name of the compound that is found in both?
corn starch
sodium polyacrylate
cellulose
bornyl acetate
The sensitivity that some people have to the bitter flavor of Brussels sprouts is genetic.
True
False
Tinsel has been made from all of the following, at one time or another, except for ___.
Ag
Al
Sn
Pb
PVC
