Question 11 67 Hectograms is how many Centigrams? O 6,700 O 670,000 O 0.067 0.0067 Question...
QUESTION 11 22.6 g of Cu represents how many moles? O 0.356 mol 2.81 mol O 1.44 x 103 mol O 1.36 x 1025 mol O none of these QUESTION 12 3.83 g of Ca represents how many moles? O 0.0956 mol O 1.54 x 102 mol O 2.31 x 1024 mol 10.5 mol O none of these Il Proctorio is QUESTION 13
Question 11 How many electrons are present in 40ca2+? 40 20 Question 12 Consider 235U. How many neutrons are present in this nuclide? 92 177 143 235 Question 13 The atomic mass of an atom is the number of ___in that particular atom. o neutrons protons protons plus neutrons o electrons Question 14 The ratio of isotopes for a given element can be measured instrumentally using a isotopometer mass spectrometer oratiometer spectrophotometer
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Question 11 (5 points) What is the equilibrium expression for the following reaction? 2Ag (s) + Cl2 (g) = 2AgCl (s) OK = 1/[C12] OK = [Agci12 / [Ag] OK = [Ag]?[c12] OK = [Agci12 / ([Ag]?[Cl2)) OK = (AgCl2 Question 12 (5 points) What is true of the percent inition OK = [AgCl2 Question 12 (5 points) What is true of the percent ionization of a weak acid as the concentration of the weak acid increases? the percent...
Question 11 2 pts The arsenic poisoning in Bangladesh affected approximately how many people in the country? 5 million people O 1 out of 10 people O300 million people 1 out of 5 people None of the above Question 12 2 pts Which of the following is the long-term health threat of the Chernobyl nuclear accident? O High rates of cancer to those exposed O High radiation concentration in the soil throughout Ukraine O Radiation in the food grown in...
QUESTION 11 How many moles of NO can be produced from the reaction of 7.00 moles of NH3 with 7.00 moles of 022 4 NH3 + 502 - 4 NO + 6H20 a. 2.40 b.6.00 Oc 7.00 d. 5.60 QUESTION 12
Question 1 How many stereogenic centers are in the following molecule? O O O O O
0.25 points Question 2 67 CU %= whole A typical sample of brass is 67% copper and 33% zinc. How many moles of zinc are dissolved in grams of copper? 0.33 moles 0.50 moles 0.67moles 1.0 moles 0.25 points Question 3 When dealing with solutions which of the following laws is not applicable? nition of Energy Question 1 Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion? addition of a material which...
How many grams of H2 are needed to react with 67 grams of O2, given the reaction: 2 H2 (g) + O2 (g) --> 2 H2O (l)
QUESTION 11 A soccer team roster has 14 players on it. How many groups of 11 players can be created? A. 6 B. 2184 C.364 D. 14,529,715,200
how many calories in 5851 kJ
Question 9 of 12 How many calories are in 5851 kJ ? (1 cal = 4.18 J) cal 7 + 8 . 9 O + x 100 on