Chemistry, 10.03.2021 18:50 ivanf30

Mineral C can be scratched by every other mineral. Mineral D can be scratched only by mineral H.

Mineral F can scratch only mineral C.

Mineral A scratches mineral E & I, but it can be scratched by mineral J.

Mineral E can scratch mineral I.

Mineral B can scratch mineral F, but it can be scratched by all other minerals.

Mineral H can scratch every other mineral.

Mineral G can be scratched by minerals H & D; it can scratch mineral J.

Item at position 1

Order the minerals from softest to hardest. Helpful Hint- You may need to write the order down in your Science notebook or scratch paper to submit the minerals in the correct order.

Answers: 1

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 08:00

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Answers: 2

Answer

Chemistry, 22.06.2019 12:20

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Answers: 2

Answer

Chemistry, 22.06.2019 17:10

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Answers: 1

Answer

Chemistry, 22.06.2019 22:30

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy

Answers: 2

Answer

You know the right answer?

Mineral C can be scratched by every other mineral. Mineral D can be scratched only by mineral H.

Questions