What process is a physical change

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the new pressure, in mm Hg, of the helium gas if the volume is 20.0 L and if there is no change in temperature or quantity? 6550 mmHg 1000 mm Hg 1310 mmHg 300 mm Hg

Do you think the school should be allowed to censor the material of a school play or school newspaper? Why or why not? Be sure to use what you know about the First Amendment to support your answer.

Can electricity cause a chemical change?

Transferring or sharing electrons between atoms forms

Which type of reproduction involves both parents? Asexual Fission Mitosis Sexual

Sodium chloride was dissolved in water to produce a 1.5M solution. Explain what this concentration tells us about the NaCl solution. How might a chemist use this ratio?

A gas is contained in a 5.0-liter container at a pressure of 100 kPa. What size container would be required to contain the gas at a pressure of 50 kPa, assuming the temperature remains constant?

Select the correct answer. What is the chemical name of the covalent compound p4S3 A. tetraphosphate trisulfide B. triphosphate tetrasulfide tetraphosphorus trisulfide D. quadriphosphide trisulfur E. quadriphosphorus trisulfide Reset

A student doing this experiment obtained the data shown in the table above. The value of the constant, k, for this data is

A fuel scientist burnt a piece of coal and a piece of wood to compare the amount of heat given off by each.