molecule shapes

What shape do you expect for molecules that meet the following descriptions? a) A central atom with two lone pairs and three bonds to other atoms. b) A central atom with two lone pairs and two bonds to other atoms. c) A central atom with two lone pairs and four bonds to other atoms.

Molecule shape

What shape do you expect for each of the following molecules? See attached for multiple choice answers

ion shapes

Predict the shape of the following ions: See attached for multiple choice questions

Photosynthesis, carbon dioxide and water converted into glucose & oxygen

If 0.50 moles of water are available, with an excess of carbon dioxide, how many moles of glucose, C6H12O6 are produced?

Predict product of neutraliztion reaction

Following netralization reaction H2SO4 + KOH ->

Balanced equation

Hi Thanks for your help with this word equation is sulfer dioxide + oxygen -----sulfer trioxide Using chemical symbols, write a balanced equation for the above reaction using the lowest possible whole number coefficents, include after the chemical formulae the symbol state of the compound. The other query is A island ...continues

Significant figures and conversions

Please give rules for significant figures and explain as go along. 1) Put in decimal form and in scientific notation with sig. figures. a) 4.060 + 120.23 + 4.1*10^-2 b) (140) / [7.2*10^3 * 16.43 * (16.43 - 14.26)] 2) How many sig. figures? a) 100 b) 1.0*10^2 c) 1.00*10^3 d) 100. e) 0.0048 f) 0.00480 g) 4.8 ...continues

Density

1) A material will float on the surface of a liquid if the material has a density of less than that of the liquid. Given density of water as 1.0g/mL, will a block having a volume of 1.2*10^4 in^3 and weighing 350 lb float or sink? 2) The density of pure silver is 10.5g/cm^3 at 20 degrees C. If 5.25 grams of pure silver pell ...continues

Atomic Theory/Nomenclature

1) A reaction of one liter of chlorine gas with 3 liters of flourine gas yields 2 liters of a gasous product. All gas volumes are at the same temperature and pressure. What is the formula of the gasous product? 2) Hydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. The mass of hydrogen that combi ...continues

Stoichiometry

5C+2so2->cs2+4c0 How many moles of cs2 for when 2.7 moles of c reacts? How many moles of carbon are needed to react 5.44 moles of so2? How many moles of carbon monoxide form at the same time that .246 moles of cs2 forms? How many moles of co2 are required to make 118 moles of cs2?