Given the diagrams X, Y, and Z below:

Key

Atom of element A=0

Atom of element B=0

Which diagram or diagrams represent a mixture of

elements A and B?

Calculate the mass of water vapour present in a room of volume 400 m3 that contains air at 27 °C on a day when the relative humidity is 60 per cent.

A gas sample occupies 350.0 mL at 546 mm Hg. What volume does the gas occupy at 652 mm Hg?

For each (P, V) pair, type the pressure in the x- column and the volume in the y-column. Then click "Resize window to fit data." Choose the power regression option. Copy the equation, using three significant figures, to match the data. v= PM 7

If you are given sodium acetate and asked to make a 0.15 M acetate buffer and titrate it to a final pH of 3.7, will you have to add acid, base, or nothing in order to achieve the proper pH? Why?

Mass is constant regardless of an object's location, but the weight of the object depends upon

A solution is made by mixing 48.0 ml of ethanol, c2h6o, and 52.0 ml of water. assuming ideal behavior, what is the vapor pressure of the solution at 20 °c?

The molar mass of CO2 is 44.01 g/mole. Choose which of the following correctly represents this relationship correctly as a conversion factor. 1 mol CO2 = 44.01 g CO2 44.01 mol CO2 = 1 g CO2 44.01 molecules CO2 = 1 g CO2 1 molecule CO2 = 44.01 g CO2

For which blocks of elements are outer electrons the same as valence electrons? For which are d electrons often included among valence electrons?

F the solution described in the introduction is cooled to 0 ∘c, what mass of kno3 should crystallize?

11. You run 100 m in 25 s. If you then run the same distance in less time, does your aver - age speed increase or decrease? Explain.