11/28/18

If I have two cubes of iron the smaller cube mass is 20 g and its density is 7.87 g per centimeter to the third what’s the larger cubes volume
If I have two cubes of iron the smaller cubes mass is 20 g and its density is 7.87 g/cm3 what’s the larger cubes volume?
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11/27/18

What is the difference between the phosphate ion in the phosphide ion?
I never learned this in chem class nor lab and am expected to answer, please help.
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11/27/18

please help me!!
Bandages can be sterilized by exposure to gamma radiation from cobalt-60, which has a half-life of 5.27 y. How much of a 10.6-mg sample of cobalt-60 is left after one half-life? 
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11/27/18

A certain animated movie earned $1.1x10^9 in revenues at the box office. The movie lasts 9.1x10^1 minutes. How much revenue was earned per minute of the movie?
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11/27/18

an automobile engine is 15 percent efficient. how many joules of input work are required to produce 15,000 joules of output work to move the car?
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11/27/18

sixty miles per hour is equal to 1 mile per minute but i need to know how to figure that out
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11/27/18

The temperature of a liquid is decreasing at a constant rate. After two minutes of cooling, it was at 178 degrees and after five minutes of cooling it was at 154 degrees.
What is the average rate of change for this scenario?At what temperature did the liquid start cooling? Show how you arrived at your answer.
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11/27/18

A plane travels at a constant speed. It takes 6 hours to travel 3,360 miles
What is the planes speed in miles per hour?
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11/27/18

true or false the exact position of electrons of an atom cannot be determined
the exact position of electrons of an atom cannot be determined
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11/27/18

Chemistry question
Calculate the concentration of dihydroxyacetone phosphate (DHAP) at equilibrium given the following information. The product GAP is glyceraldehyde 3-phosphate. DHAP=GAP, [GAP]eq=1.00×10^-6 M, Kc=0.050 more
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11/27/18

How to find mass/solubilty problems
One packet of Equal is 1 g, and only 3.87 mass % aspartame.The rest of the mass in a packet of Equal is dextrose and maltodextrin, used as “bulkening" agents to dilute sweeteners. What is the mass... more
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11/27/18

Aluminum metal is reacted with oxygen gas at STP to form aluminum oxide. If 168.6 grams of aluminum are reacted, what is the number of grams of aluminum oxide produced?
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11/27/18

The thermite reaction, in which powdered aluminum reacts with copper oxide, is highly exothermic.
2Al(s)+3CuO(s)→Al2O3(s)+3Cu(s) Use standard enthalpies of formation to find ΔH∘rxn for the thermite reaction.
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11/27/18

Calculate the amount of heat needed to melt 68.0 g of solid ethanol (CH3CH2OH) and bring it to a temperature of 15.9 degrees Celsius. What is the unit symbol for this answer?
I really am no good at this, I don't know what equation to use or how to begin solving this. This is a SOS
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11/27/18

WWhat does the oxygen family have in common with each other?nWhy are these elements in the mixed family?
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11/27/18

Chemistry problem

If 0.18 moles of a substance has a mass of 43.99 grams, what is the mass of 1 mole of the substance?
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11/27/18

The total amount of KE and PE contained by the particles in a sample of matter is what?
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11/26/18

predicting hybridization

For the following structure, predict the hybridization about the central atom. Use superscripts as needed.X---Y---X*Y has 6 lone pairs
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11/26/18

What is the net ionic equation for the reaction between Li2CO3(aq) and HCl(aq).
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11/26/18

Oxidation of monosaccharides

When 20 grams of glucose solution react with ammoniacal copper(I) chloride solution (Fehling’s reagent) 14.3 grams of Cu2O are precipitated. What is the mass percentage of this solution?
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11/26/18

Is curdling a chain reaction?
Or, like in some other reactions, will the reactants get used up if there aren't enough, and the curdling stop? like, if the milk is just introduced to a tiny but adequate amount of acid to start... more
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11/26/18

Combined and ideal Gas Laws Practice

How do I determine the temperature in kelvin of 2.45 moles of gas contained in a 1.5 L canister at a pressure of 175 kPa?
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11/26/18

A goldsmith mixed 20 g of a 60% gold alloy with 80 g of a 20% gold alloy. What is the percent concentration of the resulting alloy?
I need all the work for this problem please.
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11/26/18

How many liters of hydrogen gas at 754.3 mmHg and 723 K are required to react with 34.21 g of Iron (III) oxide?

Small amounts of pure iron are made by treating Iron (III) oxide with hydrogen gas:Fe2O3 + H2 ---> Fe + H2O How many liters of hydrogen gas at 754.3 mmHg and 723 K are required to react with... more
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11/25/18

Chemistry Question
Determine the amount (liters) of carbon dioxide produced if there if there were 28.63 liters of oxygen injected into the manifold of the below experimental combustion engine at 76.4% efficiency. ... more
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