Which of the following is a balanced chemical equation?

SO2 + O2 + 2 H2O → 4 H2SO4

H2O2 → H2O + O2

2 Fe2O3 + 3 C → 4 Fe + 3 CO2

2 Mg + HC1 → MgCl2 + H2

Carl had four metal blocks ... Each block was a different type of metal, but it had the same size and volume. All four blocks were weighed on a balance and their masses recorded in the table below.

Arrange the following measurements, in seconds, from least bias to the greatest bias. 6.63+/-0.01, 6.6+/-0.1, 6.52+/-0.05, 6.4+/-0.5

Which substance is an example of plasma? Question 3 options: Air Blood Lightning Wood Question 4 Solids, liquids, and gases are the only states of matter.

A tool to measure forces such as weight or friction

Zinc is a pure substance. How could you make a mixture from a 1.0-g zinc disc? A) Place the disc in a beaker with 200 mL of sulfuric acid. B) Divide the disc into 5 small pieces. C) Compress the disc into a flatter shape.

Consider the statement, In the following process, the number of particles increases, so ΔS for this process must be positive. MgS (s) ⇄ Mg2 + (aq) + S2 - (aq) Is this statement true?

How do you read a data table?

In the manufacturing process of sulfuric acid, sulfur dioxide is reacted with oxygen to produce sulfur trioxide.

What is the pH of a solution with hydrogen ion concentration of 1 x 10^-6 M?

What fraction can be used in conversion of 32 m3 to mm3