The volume of a sphere is given by v-(4/3)r where r is the radius. the density of magnesium is 1.74 g/cm what is the mass of a magnesium sphere with a radius of 0.80 cm? • v= x2 m= temperaure convertions show formulas used convert 38.0 °f 10 °c = 3.33 (38-32)x(5/6)=°c convert 23.5 °c 10 °f - 245 (22.5%6/5)+32=72.5°f spd.

The answer to your question is:

mass = 3.74 g

Explanation:

Data

V = (4/3) πr³

density = 1.74 g/cm³

radius = r = 0.80 cm

Process

V = (4/3) π(0.8)³             Substitution

V = 2.1446 cm³

mass = density x volume

mass = 1.74 x 2.1446      Substitution

mass = 3.74 g

I don't understand if the second section is also a question.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.