Which of the following measurements is expressed to three significant figures?

a. 7077 mg

b. 0.080 km

c. 5.60 mm

How does a solar eclipse effect earths temperature

Sufficient strong acid is added to a solution containing na2hpo4 to neutralize one-half of it. what will be the ph of this solution?

Which of the following is an example of a pure substance? Question 5 options: A. air B. salt water C. granite D. aluminum

w Available Hint (s) Check all that apply. When a solid is converted to a liquid, heat is absorbed. When heat is applied to a solid, the molecular motion decreases as the temperature increases.

Hat is the definition for a scientific theory? A. an informed explanation that can be tested but is not widely accepted B. an explanation for something that is frequently adjusted as evidence is collected C.

What volume of 6.00 m naoh would be required to increase the ph to 4.93?

Explain how the effects of nuclear charge and the increasing number of core electrons in an atom oppose each other.

What is the mole ratio of oxygen to pentane?

What does the nucleus of a cell do

A 100.0 mL sample of 1.020 M HCl is mixed with a 50.0 mL sample of 2.040 M NaOH in a Styrofoam cup. If both solutions were initially at 24.