Why is there day and night

Which statement is most consistent with the plum pudding model of the atom? 1) Electrons occupy regions of space 2) Negative particles orbit a positive nucleus 3) The atom consists of mostly empty space 4) Negative particles are embedded in atoms

A patient needs to be given exactly 500 ml of a 5.0% (w/v) intravenous glucose solution. the stock solution is 35% (w/v). how many milliliters of the stock solution are needed to prepare the fluid for the iv bag?

A molecule that dissociates in water and gives off hydrogen ions is

Using the equation, c5h12 8o2 → 5co2 6h2o, if 108 g of water are produced, how many grams of oxygen were consumed?

True or False? Elements in the same column have the same number of valence electrons.

Evaluate - if you put a scale in an elevator and weigh yourself as you ascend and the descend, does the scale have the same reading in both instances?

Why would you add a catalyst to something

A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess oxygen. The temperature rose by 0.910 K. In a separate experiment in the same calorimeter, the combustion of 0.

the volume of an ideal gas in a container is 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K

Which of the Following Will result in increasing temperature of s gas