Which one of these equations is balanced? a. Zn + 2hcl - - > ZnCl2 + H2 b. S8 + 24F2 - - > 8SF6

a

b

a and b

neither

Why is the arm often described as a sort of lever?

What is the total number of different elements present in NH4NO3? (1) 7 (3) 3 (2) 9 (4) 4

Why do different elements have different values of atomic mass?

How many days does the earth take to complete one orbit around the sun? (A) 465 (B) 265 (C) 365

This organism feeds on other organisms A. bacteria B. fungi C. virus D. Parasite

When you drop a sugar cube in a glass of water, at first the water doesn't taste sweet. Later, it tastes very sweet. Eventually, the water will taste equally sweet throughout. What term explains molecule movement to maintain a balance?

Using density what is the mass in grams of 150mL of a liquid with a density of 1.4 g/mL

All of the following can be recycled except clothing aluminum cans compact fluorescent bulbs plastic drink bottles

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.0 L of water upon warming from 25 ∘C to 50 ∘C.

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure.