Will give brainliest!

What percentage of a substance remains after 7 half-lives have passed?

2.5

1.25

0.78

0.39

If a person walks 1.3m/s how far will that person walk in 300 s?

Why do things dissolve faster in hot water

A lab technician dissolves an arrenhius acid and beaker of water what sort of ions will the lab technician find in the beaker A.) conjugate bases B.) hydrogen ions C.) conjugate acids D.) Hydroxide ions

imagine sulfur, s, is 72% sulfur-32 and 28% sulfur-33 determine the average atomic mass of sulfur in this scenario

How to convert 120 barrels to quarts?

A very simple assumption for the specific heat of a crystalline solid is that each vibrational mode of the solid acts independently and is fully excited and thus cv=3NAkB=24.9 kJ / (kmol⋅K). This is called the law of Dulong and Petit.

How many elements are found in the following chemical equation? K + Cl → KCl A. 1 B. 2 C. 3 D. 0

How many liters of 0.85 M HCl solution would react completely with 3.5 moles Ca (OH) 2?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.

Carbon dating advisable for measuring materials ages for a few years, thousands of years, millions of years