Answer;
D, Xe (g)
Solution and explanation;
If 2g has a volume of 340ml.
Density is 1000/340*2 = 5.88g/litre.
-This rules out the two solids, choices 2) &3)
If 1 litre has mass 5.88g,
then 22.4 liters (volume at STP) has mass 5.88*22.4 = 131.8g/mol
molar mass Br2 = 80*2 = 160g/mol NO
molar mass Xe = 131.3g/mol = YES.
Answer is Xe
Ba(ClO3)2 --> BaCl2 + 3 O2
The fact that there are some ionic compounds doesn't matter. Just use the formulas.
barium chlorate = Ba(ClO3)2
barium chloride = BaCl2
Oxygen = O2
Now create the unbalanced equation
Ba(ClO3)2 --> BaCl2 + O2
And balance in the usual fashion. Count the atoms of each element on both sides
Ba = 1, 1
Cl = 2, 2
O = 6, 2
And oxygen is out of balance. But can be easily handled with a 3 coefficient on the right hand side. So:
Ba(ClO3)2 --> BaCl2 + 3 O2
And we have a balanced equation.
Answer:
An apple falling to the ground is not an example of centripetal acceleration
Explanation:
Answer:
1. (a) on land and offshore
2. (c) Boiling, evaporation and condensation
3.(d) Haematite and asphalt.
4. (a) octane
5.(d) petroleum gases, liquids and solids.
Explanation:
Cracking refers to the the breakdown of heavier fractions of crude oil to give the lighter fractions of crude oil having greater economic value. For instance, diesel oil may be cracked to yield gasoline which is composed of lighter hydrocarbons and has greater economic value. Cracking is of importance in the petroleum industry because it is used to produce lighter hydrocarbons from heavier ones.
Reforming is the conversion of straight chain hydrocarbons to branched chain hydrocarbons having a lesser tendency towards knocking of engines. It is very important in the petroleum industry because it leads to the production of better quality fuels with higher octane rating.
b) In Nigeria, oil producing communities are usually faced with the problem of damage to arable land due to oil exploration activities. Many oil producing communities in Nigeria are facing severe damage to the ecosystem due to oil drilling in those areas. Also, oil rich communities are at risk of crud oil spillage which contaminates water bodies and leads to loss of employment for the local people and death of aquatic animals.
