The experimental mass was 51.5 grams and the theoretical mass was 50 grams. what was the percent error? show your work below. round your answer to two digits.

3%

Experimental:

We are given that the experimental mass was 51.5 grams and the theoretical mass was 50 grams and we are to find the percent error.

We know the formula for the percent error:

Percentage error = (| experimental value - actual value | / actual value) * 100

So substituting the given values in the above formula:

Percent error = (51.5 - 50)/50 * 100 = 0.03 * 100 = 3%

3

explanation:

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6