What is the mass number of an atom with 5 proton and 7 neutrons

Why we using dilute hcl in reaction of lead?

If a decrease in temperature accompanies a reaction, what occurred? energy was destroyed energy was restored energy was created energy was absorb

The measure of the energy of motion of particles of matter

how many valence electrons are found in most atoms of noble gases use this information to explain why the noble gases are unreactive

Which of the following is true about about sodium chloride? Substance calcium carbonate iron oxide Chemical Formula Caco Feo MgSio magnesium silicate Sio silicon dioxide sodium chloride Naci It is made up of 2 elements O It is made up of 3 elements

How many Joules are there in 55 nutritional calories?

What is the half-life (in seconds) of a zero-order reaction which has an initial reactant concentration of 0.834 m with a k value of 5.42 * 10-2 m/s?

58. Explain why each successive ionization of an electron requires a greater amount of energy. (6.3)

Define Average speed

Is the equation 3Br2+2Ga 2GaBr3 which of the following is not true