Why is it important to have a control group in an experimental investigation?
a: to show wha...
Chemistry, 31.08.2019 15:30 raoufhanna
Why is it important to have a control group in an experimental investigation?
a: to show what happens when the dependent variable is not changed
b: to see how the dependent variable changes the independent variable
c: to compare the results when the independent variable is not involved
d: to allow the researchers to change the dependent variable as they wish
Answers: 1
Chemistry, 21.06.2019 13:50
Aluminumβlithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.
Answers: 3
Chemistry, 22.06.2019 01:30
If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)
Answers: 3
Chemistry, 22.06.2019 03:30
If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.
Answers: 1
Chemistry, 22.06.2019 07:30
Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.
Answers: 2
Mathematics, 09.04.2020 16:24
Mathematics, 09.04.2020 16:24
History, 09.04.2020 16:24
Mathematics, 09.04.2020 16:24
Mathematics, 09.04.2020 16:24
English, 09.04.2020 16:24
Mathematics, 09.04.2020 16:25
Mathematics, 09.04.2020 16:25
Computers and Technology, 09.04.2020 16:25