25,963 Answered Questions for the topic chemistry

Chemistry

05/16/23

how many grams of water are produced when 34.6 grams of water are produced when 34.6 grams of butane react with excess oxygen gas?
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Chemistry

05/16/23

Question: Combustion Of 5.000g Of An Unknown Hydrocarbon Resulted In 15.14g Of CO2 And 7.751g Of H2O. What Is The Empirical
Question: Combustion Of 5.000g Of An Unknown Hydrocarbon Resulted In 15.14g Of CO2 And 7.751g Of H2O. What Is The Empirical formula
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Chemistry

05/15/23

A metal with a specific heat of 0.900 J/g oC requires 610 J of heat to raise the temperature (the change in temperature) by 25 oC. What is the mass of the metal?

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Chemistry

05/15/23

the molar masses indicated in the table below. Given a compound with a composition of 49.1% Q and 50.9% Z by mass, what is the empirical formula of this compound?

Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound with a composition of 49.1% Q and 50.9% Z by mass, what is the empirical formula of this... more
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Chemistry

05/15/23

Which of these solutions has the highest boiling point?
Which of these solutions has the highest boiling point? 2 M HCl 2 M CaO 2 M NH3 2 M CaBr2 (Thank you kindly in advance)!
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Chemistry

05/15/23

In an endothermic reaction at equilibrium, if you decrease the temperature, what will happen? 
In an endothermic reaction at equilibrium, if you decrease the temperature, what will happen? : the amount of reactant and product will stay the same more product will be formed more... more
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Chemistry

05/15/23

Rachel burns a 53 gram cracker under a soda can filled with 58.3 grams of water. She took the temperature of the water before she began
Rachel burns a 53 gram cracker under a soda can filled with 58.3 grams of water. She took the temperature of the water before she began -- it was 7.8 degrees Celsius. After the cracker was done... more
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Chemistry

05/15/23

What is the maximum mass of ammonia that can be formed when 43.88 grams of nitrogen gas reacts with 10.62 grams of hydrogen gas

What is the maximum mass of ammonia that can be formed when 43.88 grams of nitrogen gas reacts with 10.62 grams of hydrogen gas according to the following equation? Please round your answer to the... more
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Chemistry

05/15/23

A researcher is using 4.21 x 1023 molecules of chlorine gas (Cl2) in an experiment. How many grams of chlorine is the researcher using?

A researcher is using 4.21 x 1023 molecules of chlorine gas (Cl2) in an experiment. How many grams of chlorine is the researcher using? Remember to include units (abbreviated appropriately) and the... more
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Chemistry

05/15/23

After the cracker was done burning, the temperature of the water was 60.3 degrees Celsius. How many calories of heat were released by the cracker?

Rachel burns a 53 gram cracker under a soda can filled with 58.3 grams of water. She took the temperature of the water before she began -- it was 7.8 degrees Celsius. After the cracker was done... more
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Chemistry

05/15/23

Given a compound with a composition of 15.66% A and 84.34% Z by mass, what is the empirical formula of this compound?

Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound with a composition of 15.66% A and 84.34% Z by mass, what is the empirical formula of this... more
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Chemistry

05/15/23

What is the specific heat of the metal? Please answer to three digits after the decimal point and include units.
Lana is using a calorimeter to determine the specific heat of a metallic sample. She measures out 189.6 grams of her metal and heats it to 82.0 degrees Celsius. Then, she puts the sample into a... more
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Chemistry

05/15/23

What is the pH of a buffer made from 0.035 mol of HBrO (Ka= 2.5 x 10-9) and 0.120 mol of KBrO in 1.0 L of solution
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Chemistry

05/14/23

What is the resulting hydronium ion concentration and the resulting molarity of the base solution of a given reaction?
10 cm3 of a 2M solution of nitric acid (HNO3 (aq) ) is added to 10 cm3 of a 1M solution of calcium hydroxide (Ca(OH)2 (aq) ) solution.a)    What is the resulting total volume?b)    What is the... more
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Chemistry

05/14/23

If instead 0.0100 M of W, 0.0150 M of X, 0.0250 M of Y, and 0.000515 M of Z are mixed, determine the equilibrium concentrations of all species (Keq still equals 4.43 X 10-7)
If instead 0.0100 M of W, 0.0150 M of X, 0.0250 M of Y, and 0.000515 M of Z are mixed, determine the equilibrium concentrations of all species (Keq still equals 4.43 X 10-7). (assumption is needed... more
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Chemistry

05/14/23

gay-lussac gas law
If a tank of gas at standard pressure and 932.6*C is increased to 810. mmHg, what is the new temperature? Don't forget to convert to K.(hint: What's the standard pressure for this unit? This will... more
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Chemistry

05/13/23

Calculate the concentration of CH3COOH AND CH3COONa of buffer solution with pH 5.6.The total concentration of CH3COOH +CH3COONa is 0.2mol/mL.
I need a quick asnwer
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Chemistry

05/13/23

what mass of CO2 can be produced?

Given the equation below, 13.58 grams of Fe2O3, and excess CO, what mass of CO2 can be produced? Please round the answer to two digits after the decimal point.Fe2O3 + 3 CO = 2 Fe + 3 CO2
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Chemistry

05/13/23

Which of these solutions has the highest boiling point?
Which of these solutions has the highest boiling point? 3 M CH4 3 M SrF2 3 M CaF 3 M N2
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Chemistry

05/13/23

How many moles ?
How many moles of C6H12O6 are needed to produce 22.78 grams of CO2? Round your answer to three digits after the decimal point.C6H12O6 + 6 O2 = 6 CO2 + 6 H2O
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Chemistry

05/13/23

How many calories of heat were released by the cracker?
Rachel burns a 53 gram cracker under a soda can filled with 58.3 grams of water. She took the temperature of the water before she began -- it was 7.8 degrees Celsius. After the cracker was done... more
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Chemistry

05/13/23

what is the pressure of the gas?
A student is studying a sample of neon in a container with a moveable piston (this means the container can change in size). If the sample in the container is initially at a pressure of 765.6 torr... more
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Chemistry

05/13/23

What is the pressure of the sample?
A student has a sample of 1.66 moles of fluorine gas that is contained in a 27.7 L container at 297 K. What is the pressure of the sample? The ideal gas constant is 0.0821 L*atm/mol*K. Round your... more
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Chemistry

05/13/23

if you decrease the temperature, what will happen?
In an endothermic reaction at equilibrium, if you decrease the temperature, what will happen? Question 4 options: A. the amount of reactant and product will stay the same B. more product will be... more
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Chemistry

05/13/23

what is the molarity of the student's sugar solution?
A student is making a solution of sugar in water. If the student uses 0.64 moles of sugar and enough water to make 288.84 milliliters of solution, what is the molarity of the student's sugar... more
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