Ascientist observes several metals and records the following data. which of the data sets represents qualitative data? (select all that apply) the mass of the metals the volume of the metals the softness of the metals the color of the metals

The colour of the metals

Explanation:

The colour of a metal is a qualitative property, because you can’t put a number to it.

A is wrong. Mass is a quantitative property, because you can measure it (e.g., 50 g).

B is wrong. Volume is a quantitative property, because you can measure it (e.g., 50 cm³).

C is wrong. You can measure the hardness of a substance on the Mohs scale, e.g., hardness of iron = 4.5).

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.