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Rose Bud

Questions (23)

Suppose an ore sample contains 11.01 % impurity in addition to a mixture of Cu2S and CuS. Heating 102.5 g of the mixture
1. 5 answers
2. 820 views
Explain why a dust is much more explosive than is a stalk of grain.
1. 1 answer
2. 607 views
if the activation energy is larger from the perspective of the reactants than the products, the reaction is ?
1. 1 answer
2. 440 views
Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain.4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g)
1. 1 answer
2. 477 views
Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain.4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g)
1. 0 answers
2. 479 views
Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain.4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g)
1. 1 answer
2. 546 views
What mass of nitrogen monoxide can be made by the reaction of 8.00 g ammonia and 17.0 g oxygen?correct answer is 12.8 ± 0.1 (g)
1. 2 answers
2. 880 views
When 10.0 g of KOH is added to 100.0 g water, the solution's temperature increases from (25.18 C) to (47.53 C). What is the
1. 4 answers
2. 1,562 views
What is the reaction enthalpy for CaCO3(s) --> CaO(s) + CO2(g)?should i be using a enthalpy reaction table?
1. 4 answers
2. 6,301 views
The molecular formula for this compound (14.37% H, density of 1.13 g/L at 24 C and 743 mmHg) is C_H_I am not sure how to use
1. 2 answers
2. 382 views
What volume of oxygen (at 82.1 oC and 713 mmHg) will be produced by the decomposition of 5.71 potassium chlorate?i am not sure
1. 1 answer
2. 465 views
A gas is initially at 345 K, 821 torr, and occupies a volume of 5.85 L. What volume will the gas occupy if the temperature and
1. 1 answer
2. 602 views
Nine apples, four of which are rotten, are in a refrigerator. Three apples are randomly selected without replacement. Let the
1. 2 answers
2. 1,407 views
The number of calls received by a car towing service averages 21.6 per day (per 24-hourperiod). Find the probability that in a
1. 0 answers
2. 856 views
On a multiple choice test with 11 questions, each question has four possible answers, one of which is correct. For students who
1. 2 answers
2. 1,374 views
the participants in a television quiz show are picked from a large pool of applicants with approximately equal number of men and
1. 2 answers
2. 2,383 views
an experiment was conducted by measuring the change in temperature of solutions after mixing them together.After figuring out
1. 0 answers
2. 1,112 views
carbon dioxide is a "greenhouse" gas in that it absorbs energy from the sun, causing heating of the atmosphere and eventually
1. 2 answers
2. 826 views
calculate enthalpy of H for the reactionN2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) +
1. 3 answers
2. 3,678 views
calculate enthalpy of H for the reactionN2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) +
1. 0 answers
2. 1,043 views
A 65.0 g sample of 0.600 M HI at 18.46 degrees celsius is added to 84.0 g of solution containing excess KOH, also at 18.46
1. 2 answers
2. 1,629 views
Thermochemistrydetermine the final temperature if 45.67 kJ of heat energy is removed from 18.5 g of H2O (g) at 122 degrees
1. 3 answers
2. 818 views
how much heat will be liberated if 37.8 g of Fe2O3 is allowed to react with 18.7 g of aluminum.Fe2O3(s) + 2Al(s)--> Al2O3(s) +
1. 2 answers
2. 581 views

Answers (25)

yep that was defiantly the problem. thank you
i think it might be 0.002 L CuSO4 (0.80 mol/L) = 0.0016 mol CuSO4/0.008 L = 0.02 mols/L CuSO4 someone should double check that thou
i'm not sure there is on a keyboard, maybe in your word documents, if using Microsoft click on inserts and choose the insert symbol, and search through the programmed symbols in the word program.
g(c)= 19 x c^2 ? is c squared? if not g(4)= 19 x (4x2) g(4)= 19 x 8 g(4)= 152 if C is squared, i am sure you can now derive the answer with this example. simply plug in the input (4) for c
yes good point! does the 2 represent a 2 or C squared (C^2)
g(4)= 19 - (4x2) g(4)= 19 - 8 g(4)= 11
and would the answer be positive because the temperature is increased?
haha, yep, ok so q= 10,276.53 J and to get the answer in molar enthalpy should i divide q by the mole of KOH 10.0g KOH (1 mol KOH/ 56.105g) = 0.1782 mol KOH 10,276.53 J / 0.1782 mol KOH = 57,668.5J/mol = 57.6 kJ/mol Is this right?
perfect, i got a positive 178.3 kj/mol, which makes since because CaCO3 releases a lot of energy when it breaks apart, so there was more energy released when breaking apart then needed to originally form CaCO3 Thank you
*membrane transport via proteins (active transport) membrane proteins act as enzymes to catalyze vital processes of the human body. membrane proteins, cell to cell recognition
Thank you, that was awesome, I think i got the right answer now C2H4 is the molecular formula
never mind, i found out it was suppose to be in grams, and i figured out the answer.
divide the original answer by 3 and get 12Z^2 + 32Z + 5 = 0 now find common factor of 12, that work for the equation (6Z + 1)(2Z +5)=0 6Z = -1 z= -1/6 2Z = -5 Z= -5/2 now plug each Z value in to the equation (one at a time) and see which Z value lets the
I just answered a question like this a couple questions below this post!
i would think first find the average of her running speed = 4 m/hr + 6 m/hr = 10 m/hr divided by 2 = an average of 5 m/hr now 5 m/hr = 1.25 hr 1.25 hr x 5 m/hr = 6.25 miles Hope that helps, the questions seems a little vague so that's why finding an
50 < X < 65 X has to be even, and between 50 and 65 X (could be)= 52, 54, 56, 58, 60, 62, 64 Now which one of these numbers is divisible by 5 and gives a whole number answer divide each possible X value by five and see which one gives a whole number answer
discrete, is whole numbers like (0, 1, 2, 3, 4). they are countable. continuous is not whole numbers (o.976, 1.456, 2.2, 3.4) They are not whole numbers, and they are usually used when measuring something like time of a movie, length of a car. there is
Depends, where are you? in america or canada? Canada = metric system the standard SI unit for weight is kg America = Imperial system standard unit for measuring weight in imperial? ounces or pounds? These are the questions that will answer your question.
text book = 50 + (2 x Z) let Z= workbook textbook + workbook = 230 pages [50+(2Z)] + Z = 230 50 + 3Z =230 3Z= 180 z= 60 Text book = 50 + 2Z text book = 50 + 2(60) Text book = 170 REMEMBER: 50 more, really means "plus 50" in an equation 2 time the number of
THANK YOU SO MUCH I have been stumped on this question for hours on two different occasions, I am so glad you cleared this up for me.
You are defiantly right. it is suppose to be 2H2O2(l) and 4H2O(l) and the first equation is suppose to be -622.2 kJ/mol actually they are all suppose to be kJ/mol, but that was a typo on the exercise. For a final answer I got -818.2 kJ/mol i used the first
Force = mass x Acceleration Rearrange the formula to Acceleration = force/mass acceleration = 10,000N/ 1250kg acceleration = 8m/s^2 now remember this is an applied force to slow down the car (because the brakes are applied) therefore the car is not
Awesome I am defiantly starting to understand this stuff better. .065L x (.600 mol/L) = 0.0390 mol q=MC(delta T) = 149g x 4.184 J/g(C) x 3.5 celsius = 2181.9 J =2.2 kJ Then I did 2.2 kJ / 0.0390 mol = 56 kJ/mol for my final answer I got 56 kJ/mol
Thank You for my final temperature I got around 83.1 degrees celsius
Thank you I checked to see which one is the L.R, which it is Fe2O3, then i converted grams into moles and then converted those moles in to heat released and got -201.5 kJ This is the first time i have been on here, if any one wants to confirm that is the

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