Question 1(multiple choice worth 4 points)
(05.04 mc)
in an experiment, zinc chlorate d...
Chemistry, 09.08.2019 11:10 ssteitzsophiee223
Question 1(multiple choice worth 4 points)
(05.04 mc)
in an experiment, zinc chlorate decomposed according to the following chemical equation.
zn(clo3)2 → zncl2 + o2
(molar mass of zn(clo3)2 = 232.29 g/mol; zncl2 = 136.286 g/mol; o2 = 31.998 g/mol)
if the mass of zinc chlorate was 150 grams, which of the following calculations can be used to determine the mass of oxygen gas formed?
(150 × 1 × 232.29) ÷ (31.998 × 3) grams
(150 × 3 × 232.29) ÷ (31.998 × 1) grams
(150 × 1 × 31.998) ÷ (232.29 × 3) grams
(150 × 3 × 31.998) ÷ (232.29 × 1) grams
question 2(multiple choice worth 4 points)
(05.04 lc)
how many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)?
2lioh + h2so4 → li2so4 + 2h2o
3.4 mol h2so4
6.8 mol h2so4
10.2 mol h2so4
13.6 mol h2so4
question 3(multiple choice worth 4 points)
(05.04 mc)
what mass of h2 is needed to react with 8.75 g of o2 according to the following equation: o2(g) + h2(g) → h2o(g)?
0.547 g h2
1.10 g h2
4.38 g h2
17.5 g h2
question 4(multiple choice worth 4 points)
(05.04 mc)
read the following chemical equation.
fe + o2 → fe2o3
which of the following fractions can be used for the mole ratio to determine the mass of fe from a known mass of fe2o3?
four over two
three over two
two over three
two over four
question 5(multiple choice worth 4 points)
(05.04 lc)
which of the following is a valid mole ratio from the balanced equation 2fe2o3 + 3c → 4fe + 3co2?
four moles of c over three moles of f e
two moles of f e two o three over four moles of c
three moles of c over four moles of c o two
four moles of f e over three moles of c o two
Answers: 2
Chemistry, 22.06.2019 10:30
Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive
Answers: 2
Chemistry, 22.06.2019 13:10
What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction
Answers: 1
Chemistry, 22.06.2019 16:30
How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4
Answers: 3
Chemistry, 23.06.2019 01:30
If a particle has z = 25 and 23 electrons, what is its charge?
Answers: 2
History, 28.04.2021 20:20
Biology, 28.04.2021 20:20
Computers and Technology, 28.04.2021 20:20
Biology, 28.04.2021 20:20
Mathematics, 28.04.2021 20:20
Mathematics, 28.04.2021 20:20
History, 28.04.2021 20:20
Mathematics, 28.04.2021 20:20
English, 28.04.2021 20:20
Chemistry, 28.04.2021 20:20