How many seconds are there in 2500 years? (Assume 1 year = 365 days.)

Express your answer using three significant figures.

24. Many people who care about conserving natural resources would choose to use wind energy to power their homes. However, when the power is not an option for people in many parts of the country.

The number 40 in the name calcium-40 represents A. the atomic number B. the number of protons in the atom C. the sum of the protons and neutrons D. none of these

Which best describes the order of the technology used to transmit a sound through the radio

A graduate student working toward a PhD in Chemistry discovers an efficient, powerful redox reaction involving an uncommon combination of chemicals.

How do you describe how sugar dissolves in tea using the big idea of particles?

In any chemical reaction, the quantities that are conserved are ... A. mass and moles. B. the number of molecules and the volumes. C. the number of moles and the volumes. D. mass and number of atoms.

How many neutrons does element X have if its atomic number is 39 and its mass number is 75?

Enter a chemical equation for LiOH (aq) LiOH (aq) showing how it is an acid or a base according to the Arrhenius definition. Consider that strong acids and bases dissociate completely. Express your answer as a chemical equation.

Percent copper in brass lab

Which statement best describes Rutherford's model of the atom?