How many grams of NaNO3 can be dissolved in 200mL of water at 40 degrees Celsius? Group of answer choices

200 grams

210 grams

100 grams

105 grams

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

What layer of the atmosphere is directly above the troposphere?

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons