Which of the following demonstrates a double-replacement reaction?

A: Na3PO4 + MnCl2 > Mn3 (PO4) 2 + NaCl

B: CaCO3 > CaO + CO2

C: 2Mg + O2 > 2MgO

D: 2AgNO3 + Cu > 2Ag + Cu (NO3) 2

Phosgenite, Pb2Cl2CO3, is prepared by the reaction shown. If 20.0 g if lead (11) oxide and 20.0 g of sodium chloride are reacted in the presence of excess water and carbon dioxide, 12.81 g of phosgenite is produced.

Phosphine, an extremely poisonous and highly reactive gas, reacts with oxygen gas to form tetraphosphorus decaoxide and water.

How many iron atoms are contained in 354 g of iron?

The gain of electrons is called a. oxidation. c. electrochemistry. b. reduction. d. half-reaction.

What is the approximate surface temperature of the sun?

How many moles are in 26.4 grams of lithium

What is the independent, dependent, control group and constant: A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight.

Where are two places that scientists obtain scientific knowledge

Which of the following best describes what happens when an ionic bond forms? A) two atoms come together and share electrons in order to fill their octets. B) two atoms give up their electrons in order to form a bond.

Describe the attraction between 2 atoms as a result of sharing electrons