A sample of gold has a mass of 100 grams and a volume of 5cm^3, calculate the density by dividing the mass by volume

A+b→2c when the reaction begins, the researcher records that the rate of reaction is such that 1 mole of a is consumed per minute. after making changes to the reaction, the researcher notes that 2 moles of a are consumed per minute. what change could the researcher have made to effect this change?

Convert .347 kilometers to miles show your work

How many neutrons does an element have if its atomic number is 50 and its mass number is 166