What is the molarity of a HCl solution if 45.5 L were used to react with 18.6 grams of
Na2CO3?
2 HCl + Na2CO3 → 2 NaCl + H2O + CO2
The molar mass of Na2CO3 is 106 g/mol and
the molar mass of HCl is 36.5 g/mol.

Compare and contrast physical changes with chemical changes.

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

All motion is caused by force? true or false