Master Chemistry with Fun Quizzes & Brain Teasers!

how many milliliters of 2.50 m hcl (aq) are required to react with 8.05 g of an ore containing 44.0% zn (s) by mass? the molecular weight of zn is 65.38 g/mol.
1 Answer
Static equilibrium involves the sensation of linear acceleration as well as changes in head rotation. Hair cells receptive to changes in static equilibrium are found in this structure. Chemically sensitive microvilli found in this structure. Chemically sensitive cilia are found in this structure.
1 Answer
What is the approximate frequency of green light that has a wavelength of 520 nm?
1 Answer
How many liters of ammonia, measured at STP, are produced when 28.0 grams of nitrogen is completely consumed?N2(g) + 3 H2(g) 2 NH3(g)A. 11.2 B. 44.8 C. 22.4 D. 5.60
1 Answer
Q2) Circle and name the two types of oxygen containing functional groups on each sugar.If a group occurs multiple times, only circle and name it once per sugar.
1 Answer
Find the volume, in mL, of an object whose density is 400 g/mL and has a mass of 600mg.
1 Answer
why does water boil at a higher temperature than butter, which is non-polar? question 1 options: breaking of hydrogen bonds requires a lot of energy removing hydrogen from the liquid requires a lot of enegy energy is used to cool the water as it undergoes from liquid to gas energy is consumed to form hydrogen bond
1 Answer
consider the chlorotrioxyl cation. what is the central atom? enter its chemical symbol. how many lone pairs are around the central atom? what is the ideal angle between the chlorine-oxygen bonds? compared to the ideal angle, you would expect the actual angle between the chlorine-oxygen bonds to be ... (choose one)
1 Answer
a certain radioactive element has a half life of 3610 years. how much of a 4.16 g sample is left after 4231 years?
1 Answer
g the half-life of silicon-32 is 710 years. if 10 grams is present now, how much will be present in 200 years?
1 Answer
how you can use gel electrophoresis to determine molecular weight for a protein whose molecular weight is unknown.
1 Answer
what type of energy best represents the strength of an ionic bond? explain/give the rationale behind your answer.
1 Answer
5 l of a 15% saline solution was mized with 2 l of a 50% saline solution what is the concentration of the mixture
1 Answer
how is the rate of disappearance of o2 related to the rate of appearance of o3 if the o3 rate equals 6.0x105 m/s?
1 Answer
allylic bromination of methylenecyclohexane would be expected to give two isomeric monobromination products. identify the other isomer. multiple choice a b c d
1 Answer
ip the electron in a hydrogen atom with an energy of -0.544 ev is in a subshell with 18 states. part a what is the principal quantum number, n, for this atom?
1 Answer
what atomic or hybrid orbital on ge makes up the sigma bond between ge and h in germanium hydride , geh4 ? what is the approximate h - ge - h bond angle?
1 Answer
if the reaction vessel initially contained only dinitrogen tetroxide, would you expect an overall increase or
1 Answer
the earth naturally fluctuates between what concentrations of co2? group of answer choices 180-410 ppm 100-400 ppm 180-280 ppm 0-500 ppm
1 Answer
cadmium is like zinc in that it always carries a 2 charge when in an ionic compound. cadmium acetate undergoes a single replacement reaction with solid aluminum. what is the coefficient of cadmium metal in the balanced equation?
1 Answer
a sample of gas initially has a volume of 3480 ml when the temperature was -15c and has a pressure of 345 torr. what volume will the sample have if the gas pressure changes to 1.05 atm while the temperature is increased to 36 c?
1 Answer
what other information do you need in order to determine the molecular formula from the empirical formula of a compound?
1 Answer
need help asap please
1 Answer
for the reduction of benzophenone into diphenylmethanol, how would the rf values of reactant vs. product compare?
1 Answer