Which two statements are scientific claims? O A. The apparent movement of Mars across the sky influences how
people behave.
B. The polar ice caps of Mars consist mainly of carbon dioxide ice.
C. Mars is the best planet in the solar system for humans to explore
further,
D. Images of Mars show that it once had liquid water flowing on its
surface.

D and C

Explanation:

The polar ice caps are made of ice.

Planets do not affect people, nor do star signs.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.