A chocolate brownie had a volume of 640 cm³ and a mass of 480 g. Calculate its density!

What is the atomic number of zirconium? 39 40 41 42

Uranium-235 and uranium-238 are considered isotopes of one another

Given the following balanced chemical equation: Ca (OH) 2 (s) + 2HNO3 (aq) → Ca (NO) 3 (aq) + 2H2O (l) How many grams of Ca (OH) 2 are required to neutralize 25.0 ml of 0.100 M HNO3?

Calculate the [OH-] and the pH of a solution with an [H+=.00083 M at 25 degrees

Study the ion that contain the element chlorine. What are some similarities between the formulas for these ions

1000ml of a gas is cooled from 500 K to 250 K, what is it's final volume? A. 250 ml B. 1000 ml C. 500 ml D. 750 ml E. 2000 ml

A reacton has a theoretical yield of 22.8g. When the reaction was carried out, 15.1g of the product was obtained. What is the percent yield?

Which of Newtons law's is sometimes expressed as "for every action there is equal and opposite reaction"

Provide a general comparison of the empty space in a solid with that in a liquid as well as

Which of the following are chemicals? A. clothing B. food C. fuels D. all of the above