Which of these equations is balanced?

a. Zn + 2HCl - - > ZnCl2 + H2

b. S8 + 24F2 - - > 8SF6

1. a

2. b

3. a and b

4. neither

Oxygen is a gas with no color or smell a. True b. False

Is iron bromide magnetic if no why

What are the five indicators of a chemical change

Convert 3.4 moles of Hcl to grams

Freezing and thawing of water can cause A. erosion B. weathering C. flooding D. deposition

What are the primary elements of the earths layres?

How long does it usually take fir a rock to undergo a stage within the rock cycle

Calculate the ph of a solution formed by mixing 150.0 ml of 0.10 m hc7h5o2 with 100.0 ml of 0.30 m nac7h5o2. The ka for hc7h5o2 is 6.5 * 10-5.

Lead (ii) carbonate decomposes to give lead (ii) oxide and carbon dioxide: pbco3 (s) ? pbo (s) + co2 (g) how many grams of lead (ii) oxide will be produced by the decomposition of 2.50 g of lead (ii) carbonate?

Galena, a mineral of lead, is a compound of the metal with sulfur. Analysis shows that a 234-9 sample of galena contains 203 g of lead.