Which of these is NOT a mixture? A)
baking soda
B)
salt and water
iron filings and sand
D)
metal paper clips and plastic paper clips

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.