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A 'breath test' used by traffic police to check drunken driving uses?
A. Tumeric on filter paper
B. Silica gel coated with saliva nitrate
C. Potassium permanganate-sulphuric acid
D. Potassium dichromatic-sulphuric acid
Please explain why the answer is D and not C
A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage
A. 11.%
B. 22.2%
C. 10%
D. 20%
Please show working
The increase in the volume of 10cm3 of mercury when the temperature rises by 100oc is 0.182cm3. What is the cubic expansivity of mercury?
find dalta PH of 400 ml , and 1.17 molar NaOH ,when the same amount of ,100 ml of 0.05 Molar NaOH added
Imagine a collection of nuts and bolts that are all together in one pile on a table. Describe, in pseudocode, how you would find all matching pairs of nuts and bolts. You need to find one solution for each of the problem-solving approaches given below. For each of your solution, determine how many comparisons of pairs of nuts and bolts you might have to make in the best- and worst- case scenario. You can assume that there are complete pairs, no single nuts or bolts, and that for each bolt, there is exactly one nut that fits. Describe a solution to the nuts and bolts problem (in pseudocode) using a Divide and Conquer Approach.
Zaheeda scored 9 goals in 5 netball matches At this rate about how many goals will she score in 10 games
Output all combinations of character variables a, b, and c, in the order shown below. If a = 'x', b = 'y', and c = 'z', then the output is:
xyz xzy yxz yzx zxy zyxIn a Atomic Nucleas the Protons and Neutrons
That hold the Atomic Nucleas Together the Chemical Energy for this process in gasoline .What gets shared for forming the liquid gasoline is it Neutrons , Protons , or Electrons
How to write a Chemistry Formula For
Sharing Electrons, Protons, or Neutrons
To Make Gasoline
In a workshop,one end of a chain is attached to a wall and the other end to an engine of mass of 400kg. A rope is also attached to the engine at the same point and a force is applied in order to lift the engine. To keep the engineat restin the position shown in the diagram a force F must be applied. Write down the resultant force on the engine where force a F is applied so that the engine is stationary
WHEN WRITING A REDOX CHEMICAL EQUATION
DOES IT DEAL WITH SHARING ELECTRONS OR PROTONS
IS A REDOX CHEMICAL EQUATION
SHARING PROTONS , NEUTRONS OR ELECTRONS
