I need help ASAP What is the result of the following calculation? Record to the correct number of significant figures.
7.520 mL + 0.01509 mL = ?

a. 7.535 mL
b. 7.53 mL
c. 7.5351 ml
d. 7.53509 mL

Calculate the number of moles of ethane in 100 grams

Explain that newton first law,second law and third law of motion?

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?