Potassium, k, has an atomic number of 19 and an atomic mass of 39 how many electrons does a neutral atom of K have?

In the formula for water what does the subscript 2 indicate

Identify the indicated sets of protons as unrelated homotopic

What is the coordination number of the central metal ion in [co (c2o4) 2 (oh) 2] 3 - ?

Yousef measured the height of each seedling on day 1 and day 7. These are his results. Group Seedling Increase in height/mm A no water 6.5 0.5 0.5 0.5 5.5 B 2 cm water Height of seedling/mm Day 1 Day 7 - 6.0 5.5 6.0 6.0 5.5 7.5 6.0 8.0 6.0 8.5 6.0 9.

Which term defines the ability of a solute to dissolve within a solvent? A. solubility B. fissionability C. absorbability D. saturability

Which of the following is not a projectile? a. a satellite b. a throw ball c. a ball on the ground d. a soaring arrow

A change of state requires the addition or removal of heat energy. True False

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars.

How long does a hydrogen bond last in water

If the body temperature of a person is recorded as 37°c, what is the person's body temperature in k? round your answer to the nearest whole number.