Rubidium has a mass number of 87 and an atomic number of 37. how many electrons does it have?

Select the statement (s) that explain (s) the relationship between the arrangement of elements by size and first ionization energy. 1.

The calculated yield for the production of carbon dioxide was 73.4g. When the experiment was performed in the lab, a yield of 72.3g was produced. What is the percent yield of carbon dioxide?

What is the mass of exactly 1 mol of the following elements osmium, Cesium, krypton

The molar mass of KCl is 74.55 g/mol. If 8.45 g KCl are dissolved in 0.750 L of solution, what is the molarity of the solution? 0.113 M 0.151 M 6.62 M 11.3 M

The amount of heat transferred from an object depends on which of the following? a. the specific heat of the object b. the initial temperature of the object c. the mass of the object d. all of the above

The density of water is 1.0 g/cm3 will rubbing alcohol float with a density of 0.81 g/cm3

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.

Which of the following terms is defined by the measure of mass per unit of volume? gravity density weight acceleration

Select the lon. O NO₂ H2SO4 O A3

True or False: A Solar eclipse occurs when Earth casts a shadow on the Moon.