An atom has 5 protons and 7 neutrons. What is its mass number of amu?

An object will float when: A. buoyant force is equal to the weight of the object B. buoyant force is less than the weight of the object C. density is equal to the weight of the object D. density is greater than the weight of the object

Calculate the amount of heat required to heat a 3.3 kg gold bar from 26 ∘C to 69 ∘C. Specific heat capacity of gold is 0.128 J/g∘C.

A titration was performed on 50.0mL of 0.250 M NaOH. After the addition of 7.14mL of HCI, the phenolpthalein indicatorchanged from pink to colorless. What was the concentration ofthe hydrochloric acid?

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What charge do electrons have?

Boron has an average mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The other isotope has a relative abundance of 80.20 percent. What is the mass of the two isotopes?

What type of radiation is most likely to damage DNA? A. ionizing B. non-ionizing

Water vapor cools and comes together to form a cloud. This is an example of what change in state? condensation evaporation melting

Which group of the periodic table does this element most likely belong to

What is the ph of a 7.5*10^-3 m H + solution