Which group of elements are considered to be in the same family?

A. helium, neon and argon

B. potassium, calcium and scandium

C. manganese, iron and cobalt

D. hydrogen and helium

A 22.25 g piece of metal is dropped into a graduated cylinder with 126.3 mL of water. If the density of the metal is 4.43 g/cm3, what is the total volume in the graduated cylinder in mL with the correct number of significant digits?

The answer that he gave was wrong

Law of conservation of Mass states that all chemicals equations have to be balanced. True False

Which of the following are accurate descriptions of closed and open thermodynamic processes? open processes are 'flow through' processes in closed processes the working substance enters from the right and exits to the left open processes take place

How many moles of molecules are in a mass of 26.8 g of xe at stp?

Consider a situation in which 211 g g of P4 P 4 are exposed to 240 g g of O2 O 2 . What is the maximum amount in moles of P2O5 P 2 O 5 that can theoretically be made from 211 g g of P4 P 4 and excess oxygen?

What is the total pressure when 0.400 g of H2, 2.00 g of N2, and 10.5 g of CO2 are injected into a 10.0 liter flask at 273 K?

The balanced chemical equation for the combustion of methane is: CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) Which of the following statements concerning this chemical equation is/are correct? 1.

In one kind of nuclear reaction, two nuclei fuse, or join together, to form a larger nucleus. This kind of reaction happens only at very high pressures. Explain why such high pressures are necessary to cause these reactions to occur.

Check the approach to obtain the correct conversion equation. Use the temperature in °F to find the temperature in °C. °C