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

A scilentific experiment is repeated, but its results cannot be repeated by others. What can you conclude about the experiment?

A gas has a pressure of 610.0 mm hg. what is the pressure in atmospheres answer

How do all five sphere interact with thunderstorms

60.0 mL of 0.100 M Ca (OH) 2 solution is mixed with 50.0 mL of 0.100 M HNO3. Calculate the volume of 0.100 M H2SO4 needed to neutralize the resulting mixture.

Which of the following is NOT evidence that a chemical reaction has occurred?

Select the correct answer. A man pours some hot coffee into a small cup from a large jug that contains enough coffee for several cups. Which statement correctly compares the coffee in the cup and in the jug? A.

Is sponge cake a heterogeneous mixture

Describe three skills people use to conduct scientific investigations

The surface temperature on Venus may approach 739 K. What is this temperature in degrees Celsius?

Complete the acid-base reaction between butyric acid HC4H7O2 and potassium hydroxide KOH. Do not include phase designations for any of the reactants or products. Be sure to include the charge for any charged species.