Respuesta :
1) According to the law of conservation of mass, which statement about chemical reactions is always true?
Answer: The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products.
2) When 1 mole of nitrogen gas (N2) reacts with 3 moles of hydrogen gas (H2), how many moles of ammonia (NH3) are produced?
Answer:
2 moles
3) Sulfur trioxide gas combines with water to form a single product.
SO3 + H2O → ?
Based on the law of conservation of mass, which option is the product of the reaction?
Answer:
H2SO4
4) Lead (II) nitrate as Pb(NO3)2 and potassium iodide as KI combine to form the products shown.
2 KNO3 + PbI2
How many moles of each reactant are involved in the reaction?
Answer:
1 mole of lead (II) nitrate and 2 moles of potassium iodide
5) In a reaction, 1 mole of silver nitrate combines with 1 mole of sodium chloride.
AgNO3 + NaCl
Which statement about the product is justified by the law of conservation of mass?
Answer:
There will be 1 mole of silver (Ag) in the product.
