Which one of the following is a pure substance? 1. milk2. Concrete3. Wood 4. Salt water5. Elemental copper

What is the molarity of the solution produced when 85.6 g of hydrochloric acid (HCl) is dissolved in enough water to prepare 385 mL of solution?

A compound contains 14.5 g of magnesium and 3.5 g of oxygen. What is the mass percent of oxygen in the compound?

use the molar volume of a gas at STP to calculate the density of nitrogen gas at STP. How do I use the molar volume?

You have a stock solution of 14.8 m nh3. how many milliliters of this solution should you dilute to make 100.0 ml of 0.250 m nh3?

How do weathering and deposition differ? A. Weathering breaks down rocks; deposition leaves them in new places. B. Weathering has to do with air; deposition has to do with plants. C. Weathering occurs only in summer; deposition occurs year-round. D.

Water has a density of 1g/ml. what is the mass of the water if it fills a 10ml container?

The diameter of a carbon atom is approximately 144 pm. Assuming a nanocontainer has a simple cubic structure and have an edge length of 25 nanometers, how many carbon atoms are there on a single edge of a nanocontainer?

How can molecules with polar bonds be nonpolar?

what would the total pressure of a mixture of fluorine, chlorine, and bromine gases be if the partial pressure are 2.20 atm, 6.70 atm, 0.03 atm respectively

Which net change occurs in a nuclear fusion reaction? (1) Ionic bonds are broken. (2) Ionic bonds are formed. (3) Energy is converted to mass. (4) Mass is converted to energy.