Chemistry, 20.02.2021 06:40 quanyoung88
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2. Indicate the number of molecules in:
a. 0.5 moles NH3
b. 1 mole of KOH
3. Indicate how many moles of compounds are in:
a. 1 g of HCl
b. 1g H2
c. 1 g CH4
4. One container contains 150 g of ethyl alcohol, C2H6O.
a. Calculate the number of moles of C2H6O
b. The number of C2H6O molecules
5. What is the centesimal composition by mass of Cu (NO3) 2?
6. A compound has the following centesimal composition by mass: Na: 43.4%, C: 11.3%, O: 45.3%. Find your formula
Data: Atomic masses: Ag = 108; N = 14; Al = 27; P = 31; O = 16; H = 1; K = 39; Cl = 35.5; C = 12;
Answers: 3
Chemistry, 22.06.2019 14:00
650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal
Answers: 2
Chemistry, 22.06.2019 14:30
Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.
Answers: 1
Chemistry, 22.06.2019 18:00
Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?
Answers: 2
Chemistry, 22.06.2019 18:10
Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.
Answers: 3
I'm counting on you guys, this my last chance, give a hand and I give you a good brainliest and 20 p...
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