Chemistry Answers

A drop of liquid bromine is placed in the bottom of a gas jar.brown fumes of bromine vapour slowly spread through the covered jar.

Why does this happen?

A.bromine vapour is less dense than air

B.Bromine molecules and the molecules in the air are always moving around

C.Bromine molecules are smaller than the molecules in air

D.Bromine molecules move faster than the molecules in air

Which is the answer and explain all the options.

You have been given this soil analysis report and are requested are requested to make

a fertiliser recommendation for production of sweet-corn using the brown book, the

Fertiliser Society of South Africa. The expected yield is 30

tons per hectare of fresh cobs.

You received results from an accredited laboratory. the Bray 1

reads 13 mg per kg of soil, while the K (NH4OAc method) reads 98 mg per kg of soil.

Calculate how many kg per ha of N, P, K will you need to apply according to the analysis

results, considering guidelines in the three attached pages from the Fertiliser Handbook.

Use the Kynoch fertiliser mixture list to recommend a fertiliser mixture, then

calculate the kg per ha of this fertiliser mixture and LAN (lime ammonium nitrate) straight

fertiliser for topdressing-N at between four and eight weeks after planting

Hint: You will be band-placing mixture and topdressings-N fertilisers, and only up to 300

kg per ha of fertiliser is recommended in this fertiliser placement strategy.

Make a fertilizer calculation if the expected yield is 30 tons per hectare of fresh cobs. You received results from an accredited laboratory, the Bray 1 reads 13 mg per kg of soil, while the K (NH4OAc method) reads 98 mg per kg of soil. Calculate how many kg per ha of N, P, K will you need to apply according to the analysis results, considering guidelines in the three attached pages from the Fertiliser Handbook. Use the attached Kynoch fertiliser mixture list to recommend a fertiliser mixture, then calculate the kg per ha of this fertiliser mixture and LAN (lime ammonium nitrate) straight fertiliser for topdressing-N at between four and eight weeks after planting (choose any one of the products from 1 to 21 on the list for the fertiliser mixture). Hint: You will be band-placing mixture and topdressings-N fertilisers, and only up to 300 kg per ha of fertiliser is recommended in this fertiliser placement strategy.