The two most abundant elements in the universe are:

a. Hydrogen and Oxygen

c. Hydrogen and Helium

b. Oxygen and Nitrogen

d. Carbon and Oxygen

An isolated insulated cylinder contains 15.40 grams of neon gas and a 62.30-gram bronze medal in thermal contact. When the bronze medal was put into the cylinder, its temperature was 72.30°C.

What is the percent composition each element in c6h8o6

A gas at 255 kilopascals and 45°C has an initial volume of 2.00L. The pressure of the gas increases to 805 kilopascals as the temperature is raised to 255°C. What will be the new volume? 1.05 liters 2.28 liters 1.25 liters 0.44 liters 1.50 liters

Explain the electrical conductivity of melted and of aqueous solutions of ionic compounds using the characteristics of ionic compounds

Chemists investigated an unknown substance and found it to have the following characteristics: -Different components could be observed in the substance. -Different samples of the substance appeared to have different proportions of the components.

If a new substance is formed in a chemical reaction, what atoms do they consist of?

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong