Master Chemistry with Fun Quizzes & Brain Teasers!

Cause and Effect. Unbalanced forces acting on a Nebula result in___a. A constant linear motionb. Equilibrium of the nebulac. A change in its motion
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What is the volume occupied by 3.67 moles of h2 gas at stp? (hint: you do not need the molar mass to do this conversion because it is a gas) *
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Questlon 25 of 25henry lifted a box that weighed 500 n to a height of 0.75 meters. it took him1.5 seconds. how much work did henry do?o a. 667 jb. 750 jc. 500 jd. 375 j
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2) A 45. 7 g sample of glass was brought to thermal equilibrium with boiling water and thentransferred to 250. 0 g of water that was at 22. 5 C. This combination reached thermalequilibrium at 24. 2 C. What is the specific heat capacity of glass?
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Dead plant material can be compressed into coal (organic). the rock gets buried within the earth. the heat and pressure from the overlying material turn this coal into anthracite coal. what types of rocks are being described in this process? *a: sedimentary and metamorphicb: sedimentary and igneousc: metamorphic and igneousd: igneous, metamorphic and sedimentary
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A 75.0 ml volume of 0.200 m nh3 (kb = 1.8 * 10^-5) is titration with 0.500 m hno3. calculate the ph after the addition of 19.0 ml of hno3
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What is the answer of the ice cream activity of integration
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How many molecules of acetyl-CoA result from complete catabolism of the following compounds?
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You perform a titration where you add 0.35 m hcl to a flask containing 50 ml of 0.75 m naoh. what is the ph after you add 50 ml of 0.35 m hcl
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A weather balloon was filled up to 7. 50 L with 6. 50 moles of Hy gas. The balloon gradually effuses some of its hydrogencontent, deflating the balloon to 3. 30 L. At this new volume, how many moles of Hy gas are there now?A. 3. 81 molB. 14. 8 molC. 2. 86 molD. 0. 0677 mol
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If re glazing do you cover what was forgotten(in the 2nd firing) or you freglaze everywhere
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How might the jetstream affect the winter in your town this winter explain your answer
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The table below shows the vapor pressure of water at various temperatures.Temp(degC) Vapor Pressure (mmHg)1714.51815.51916.52017.52118.72219.8During an experiment 675 mL of helium gas is collected over water at 22 degC. The air pressure in the lab is 0.926 atm. What is the partial pressure of the dry helium collected?
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Walking at a brisk pace burns off about 280 cal/h. how long would you have to walk to burn off the calories obtained from eating a cheeseburger that contained 25 g of protein, 25 g of fat, and 31 g of carbohydrates? [hint: one gram of protein or one gram of carbohydrate typically releases about 4 calg, while fat releases 9 cal/g. ] hours
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Blackworms were collected from an environment with an acidic pH, and the pulse rates were measured. Predict the outcome of the measurements. [2 pt] The pH of the nevironment would have no effect on pulse rate. The pulse rate would be increased to minimize the effects of acidosis. The pulse rate would be increased to minimize the effects of alkalosis. The pulse rate would be decreased to minimize the effects of acidosis
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A student starts with s 18. 0 M solution of H2SO4. How many ml would be required to produce 235 ml of a 1. 77 M H2SO4 solution?
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Question 3 & what is the hydronium concentration for a solution with a poh = 12.04 o -1.08 m o.98 m 0.011 m p o 1.96 m question 4 a solution is made by combining 2.5 moles of hf (ka 3,5 x 19 and 3.5 mol click save and submit to save and submit chick save asters to small ans
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In the reaction of h2 with cl2, the molecular bonds of the reactants are broken and new bonds are formed to make the products. what step(s) is/are considered endothermic?steps:_
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How many moles of chnhcl need to be added to 200.0 ml of a 0.500 m solution of chnh (kb for chnh is 4.4 10) to make a buffer with a ph of 11?
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Three ions that contain the element phosphorus are phosphate (PO43), hydrogen phosphate (HPO42), and dihydrogen phosphate (H2PO4). Compare the formulas of these three ions. Also notice any other instances in which hydrogen is added to a polyatomic ion from the table. Then complete the description of the pattern you see. Select the correct answer from each drop-down menu
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Green tea has a ph of 8.2 what is the (oh-) and is it acidic or basic
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9. What is the pH of a 0. 25 molar HBz (benzoic acid) solution. Ka HBz=6. 5 x10-5
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13. one of the two products of the reaction of baking soda and vinegar is carbonic acid (h2co3), which immediately forms water and the gas you identified after exposure to the flaming and glowing splints. write a balanced equation showing the decomposition of carbonic acid.
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Substances can be the same if one has more of the same type of repeating group of atoms
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