Which of the following statements about protons are true?

Protons have twice the mass of neutrons.

Protons have the same magnitude of charge as electrons but are opposite in sign.

Protons have a charge of 1+.

Most atoms have more protons than electrons.

Which is the next logical step in balancing the given equation? N2 + O2 → NO2 A. Place the coefficient 2 in front of oxygen and nitrogen dioxide. B. Place the coefficient 3 in front of oxygen and nitrogen dioxide. C. The equation is already balanced.

If you have 15 grams of water, how many molecules of water do you have?

Which of the following combustion reactions is balanced correctly? A. C4H6 + 5.5O2 4CO2 + 3H2O B. C4H6 + 4O2 4CO2 + 3H2O C. C4H6 + 11O2 4CO2 + 3H2O D. C4H6 + 1.5O2 4CO2 + 3H2O

How many significant figures are in 54,050?

What has its own size and shape

Heat that flows by conduction is the transter of thermal energy between substances in contact. What must occur for this to happen? The two systems must be the same temperature, The two systems must not be touching each another.

What piece of information connects mass and moles?

What relationship can be seen in an element's placement within a group and its electron configuration?

Which of the following is true concerning atoms? A. Atoms are made of even smaller substances called subatomic particles B. The properties of atoms cannot be measured or observed

Intermolecular forces as a whole are also known as