How many mL of a 4.50M NaBr solution are needed to make 250 mL of a 0.75M solution of NaBr?

A gas that has a volume of 28 liters, a temperature of 45C, And an unknown pressure has its volume increased to 34 liters and it's temperature decreased to 35C. If I measure the power after the change to be 2.

A dam is used to retain water. Retaining water can also lead to flooding. Which most likely would be a new societal issue resulting from the installation of a dam?

Class science A revolution occurs: Question 14 options: Each time the Sun rotates around the Earth Each time the Earth turns once on its axis Each time the Earth orbits the sun once

A 1,000 g ball and a 100 g ball are dropped from a tower. Both balls are the same size and there is no air resistance. Which one hits the ground first? The 1,000 g mass hits the ground first. They both hit the ground at the same time.

N a nuclear reaction, mass must be lost to produce energy. true or false

Enter a balanced chemical equation for the combustion of gaseous methanol.

Being able to identify good source of scientific information and apply the knowledge to problems in your life is a part of having A Scientific hypothesis B Scientific inquiry C Scientific literacy D Scientific laws

Hexane and heptane are miscible with each other in all proportions. In making a solution of them, is the entropy of the system increased, decreased, or close to zero, compared to the separate pure liquids? a. The entropy of the system is increased.

Determine the hydronium ion concentration in a solution that is 0.00014 M HCl. Answer in units of M.

Which element in period 2 has the most mass