The sun is made of plasma (super-heated gas), which is easily compressed by gravitational forces. What process counteracts gravity in the sun?
A Nuclear radiation pressure
B Gravity
C Hydrogen and oxygen bonding to form water
D Nucleic acid
E Helium splitting to form Hydrogen

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Iam in desperate need of with this !

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?