1. How many moles are contained in 103.4g of sulfuric acid?
a) 2.9 * 10^22 molecules of sulfuric acid
b) 5.18 * 10^24 molecules of sulfuric acid
c)12.1 * 10^23 molecules of sulfuric acid
d) 6.35 * 10^23 molecules of sulfuric acid
2. Which of the following statements is true?
a) 1 mole H atoms = 6.02 * 10^23 H atoms
b) 1 mole pennies = 6.02 * 10^23 pennies
c) 6.02 * 10^23 H atoms have a mass of 1.0g
d) The formula mass of O= 32.00 amu
One mole of NH3 contains:
a) 1.806 * 10^24 atoms of hydrogen
b) 1.4g of nitrogen atoms
c) 6.02 * 10^23 molecules of ammonia
d) 7.0g of ammonia
Answers: 2
Chemistry, 22.06.2019 06:00
Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced
Answers: 1
Chemistry, 22.06.2019 18:40
What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j
Answers: 1
Chemistry, 22.06.2019 23:20
In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as
Answers: 2
1. How many moles are contained in 103.4g of sulfuric acid?
a) 2.9 * 10^22 molecules of sulfuric ac...
English, 04.07.2019 13:20
Mathematics, 04.07.2019 13:20
Chemistry, 04.07.2019 13:20
Mathematics, 04.07.2019 13:20
Mathematics, 04.07.2019 13:20
Social Studies, 04.07.2019 13:20