Chemistry, 12.10.2020 06:01 supiine1405
Physical and Chemical Changes Separation of a Mixture
Mass of evaporating dish + watch glass=273.5g
Mass of evaporating dish, watch glass + sample=278.5g
Mass of sample=5.0g
Determining percent of NaCl in mixture:
Mass of evaporating dish, watch glass, and solids(after water washes)=286.1g
Mass of NaCl=
Percent of NaCl in unknown=
Determining Percent of CaCO3 in mixture:
Mass of dish, watch glass, and SiO2( final weighing)=239.2
Mass of CaCO3=
Percent of CaCO3 in unknown=
Determining a Percent of SiO2 in mixture:
Mass of SiO2=
Percent of SiO2 in unknown=
I really don't understand how to math all of the stuff so if you could also provide how to solve it, that would be helpful!
Answers: 3
Chemistry, 22.06.2019 05:30
Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat
Answers: 1
Chemistry, 22.06.2019 13:00
One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.
Answers: 1
Chemistry, 22.06.2019 20:20
Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)
Answers: 1
Chemistry, 22.06.2019 20:30
Select all the correct answers.which compounds have the empirical formula ch20? (multiple answers)a.c2h4o2b.c3h603c.ch2o2d.c5h1005e.c6h1206
Answers: 2
Physical and Chemical Changes Separation of a Mixture
Mass of evaporating dish + watch glass=273.5g...
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