A helium balloon contains 0.48 g of helium. Given the molecular weight of helium is 4.0g/mol, how many moles of helium does it contain?

Summarize the difference between legal law and scientific law

Which type of elements are lanthanides and actinides part of? inner transition metals noble gases halogens metals

Whats sodium stannite? and how can it be prepared?

Calculate the empirical formula for each of the following stimulants based on their elemental mass percent composition. adenine (a nucleobase (a purine derivative) with a variety of roles in biochemistry) : C 44.44%, H 3.73%, N 51.83%

How many atoms are in 5.40mol of iron

How many grams of KCl are produced when 60 grams of K are reacted?

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How do compounds affect an atom's stability

You need to make 10 mL of 2 mg/ml solution of protein and you have 25 mg/mL solution. How much protein solution and water do you need to mix in order to make the required solution?

The definition of volume is? a) width*height b) the space occupied by mass c) the space occupied by a liquid d) the mass of liquid required to fill a container