Iron has a density of 7.87 g/cm^3. What is the mass of 55.2 cm^3 of iron?

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass

Why is any chemical reaction always balanced? give reasons and explain the easiest way to solve the balancing problems in chemical equations with stoichiometric coefficients upto 20 as hit and trial doesn't always work. give full reasoning