Which of the following is considered a hypothesis as opposed to an observation

Which of these elements has the largest atom? * phosphorous magnesium calcium beryllium

Determine the quantity of pure MgSO4 in 2.4 g of MgSO 4 ⋅ 7H 2 O MgSO4⋅7H2O

Water has a density of 0.997 g/cm^3 at 25 degrees C; ice has a density of 0.917 g/cm^3 at - 10 degrees C. (question part a) If a soft drink bottle whose volume is 1.

How many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?

Describe how the molecular models you assembled are different from real molecules.

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?