Amole of cu atoms has the same number of atoms as a mole of he atoms. true false

What’s the scientific notation for the number 6,840,000,000

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !