How do you determine the density of a substance or object?

An isotope, X, of a particular element has an atomic number of 8 and a mass number of 18. Therefore: A. X is an isotope of oxygen. B. X has 10 neutrons per atom. C. X has an atomic mass of 15.9994. D. A and B. E. A, B, and C.

Explain how Seafood Watch promotes environmentally responsible fishing practices adaptation speciation extinction death

A microwave works by focusing microwave light on the food inside of it. Which type of energy transformation takes place in a microwave? A. Heat energy is transformed into light energy. B. Electrical energy is transformed into light energy. C.

Which of the following is the best explanation of the scientific method? A. The scientific method is a set of rules that every student should follow in science. B. The scientific method is quite different than the way people solve everyday problems.

34. According to Bohr's theory, an electron's path around the nucleus defines its a. speed. c. atomic mass. b. electric charge. d. energy level

If The mass of a box is increased and the force stay the same, determine the relationship with acceleration

A balloon contains 0.15 moles of co2 gas. how many molecules of co2 are in the balloon?

Acids A) are generally proton donors B) produce H + ions in solution C) are electron pair acceptors D) may include all of these characteristics

3.011 x 10^23 atoms F in grams

What would you use if you needed to determine the density of an object? balance and graduated cylinder balance and scale scale and spectroscope