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a) is this a study or an experiment? explain
b)explain in this context what "not statistically significant" means.
c) comment on the fact that this research was funded by Motorola, a manufacturer of cell phones.
a) what percentage of rivets selected at random will break when tested under a 900 pound load?
b) you're trying to improve the rivets and want to examine some that fail. use a simulation to estimate how many rivets you might need to test in order to find three that fail at 900 pounds or below.
None of the above
1 molal solution
1 molar solution
They are equivalent
18 A solution contains 4 grams of sodium hydroxide in 250ml of solution. If Na=23, O=16 , H=1 and
of water weighs1g, what is the concentration of the solution in weight per weight percent?
19 A solution contains 4 grams of sodium hydroxide in 250ml of solution . If Na=23, O=16, H=1 and
of water weighs 1g, what isthe concentration of the solution in grams per
20 What is a standard solution?
Solution that has been weighed
Solution which has a concentration that is accurately known
Solution that has one standard amount dissolved in water
Solution that is very distinct in its properties
14 What is a mole of a substance ?
Amount of substance which contains 14.0g of carbon 12 isotope
Amount of substance which contains 13.0g of carbon 12 isotope
Amount of substance which contains 12.0g of carbon 12 isotope
Amount of substance which contains 11.0g of carbon 12 isotope
15 In chemistry, substances react on the basis of ?
Amount in grams equivalent
Amount in volume equivalent
Amount in relative ratios
Amount in moles equivalent
16 An undergraduate student weighed 20g of sodium carbonate salt. If Na=23, O=16, carbon = 12and H=1, what is the mole of the hydroxide?
10 The base unit of a measured or weighed solid material in chemistry is ?
11 The equivalent of one kilogram is -----------.
12 The base unit of a measured liquid called volume is called ?
Freeze drying the solution
Prespitatiog out the solution
Filtering out the solution
Control heat of the solution.
6 Filteration can be defined as a process -----------------------.
of separating two immiscible liquids
of separating solid crystals from the liquid in a solution
of separating two miscible liquid based on their colours
that involves the addition of a precipitants to a solution
7 A precipitated salt can be dried using -------------
Wrapped with filter paper
Heated tungsten wire
8 Which of the following gives the most accurate volume of a measured solution
50 ml burette
Please note that writers did not follow recommended structure on this essay
writing-Suggested option was based on supporting argument; However, too much information regarding the counterarguments was written.
- The Introduction part didn't include the main idea of the body paragraph.
- some structural grammatical errors were noticed
- Good content and language usage