不用客氣

[匿名]

回覆: 2

2020-04-05 9:23 pm

HELP What is the concentration of hydroxide ions (OH−) in a saturated solution of Al(OH)3? The Ksp of Al(OH)3 is 1.8LaTeX: \times×10−33. ?

[匿名]

回覆: 2

2020-04-05 4:07 pm

NaNO2 and 11.5g are obtained from heating 75.1g NaNO3, what is the mass percent yield of O2?

[匿名]

回覆: 3

2020-02-14 1:53 am

chem question please help?

[匿名]

回覆: 3

2019-11-14 12:06 am

The chemical reaction for Copper (II) sulfate and Ammonium phosphate? What would be the net ionic equation?

[匿名]

回覆: 1

2018-02-12 8:25 am

The equilibrium system between hydrogen gas, bromine gas, and hydrogen bromide gas is given. H2(g) + Br2 (g) <----> 2HBr(g).?

[匿名]

回覆: 6

2018-02-12 9:23 am

Evalutate a^2b^4 when a= 9/25 and b= 1 2/3, I have no idea how to approach this?

[匿名]

回覆: 1

2018-02-12 9:13 am

A fixed quantity of gas occupies a volume of 1.500 L at 1.25 atm. Use Boyle's law to compute the volume when pressure reaches 3.75 atm.?

[匿名]

回覆: 1

2018-02-12 8:27 am

Consider the following reaction: PCl5(g) <----> PCl3(g) + Cl2 (g)?

[匿名]

回覆: 3

2018-02-08 6:20 pm

write the equation for the reaction bewteen 1-chloripropqne with ammonia. name the organic comppund formed. Write the mechanism for reaction?

[匿名]

回覆: 4

2018-02-08 12:16 am

HELP!! Chemistry Question!?

[匿名]

回覆: 2

2018-02-08 12:08 am

chemistry grade 12 Question?

[匿名]

回覆: 1

2018-02-07 4:14 pm

Chemistry Stoichiometry?

[匿名]

回覆: 2

2018-02-07 2:39 pm

A 2.00 mL ampule of a 0.110 M solution of naphthalene in hexane. The naphthalene emits 18.6 J of energy at an average wavelength of 349 nm.?

[匿名]

回覆: 1

2018-02-07 1:32 pm

How many molecules of C5H10 would you have if you have 5.51 mol? Report your answer with 3 significant figures and in scientific notation.?

[匿名]

回覆: 4

2018-02-06 1:22 pm

A gun is fired vertically into a 1.75 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 190 m/s?

[匿名]

回覆: 6

2018-02-06 3:09 pm

5/7(b-35) equals?

[匿名]

回覆: 5

2018-02-06 2:09 pm

Finding total distance with integration?

[匿名]

回覆: 1

2018-02-06 12:16 pm

Write an equation for the reaction for sodium laurate and H3O?

[匿名]

回覆: 3

2018-02-06 1:17 pm

Chem question?

[匿名]

回覆: 1

2018-02-06 10:22 am

BASIC CHEMISTRY!!!?

[匿名]

回覆: 2

2018-02-06 9:57 am

Physics Question?

[匿名]

回覆: 8

2018-02-06 9:55 am

Solve for b if [b/(4+i√3)] - [b/(4-i√3)] = 1.?

[匿名]

回覆: 2

2018-02-06 9:39 am

Write the net ionic equations for the reaction of Na2S(aq) with Pb2+(aq) and Zn2+(aq)?

[匿名]

回覆: 4

2018-02-06 12:55 am

Geometric Progression?

[匿名]

回覆: 1

2018-02-06 12:03 am

Calculate the volume of a 0.106 M CuSO4 solution that would react with 7.19 g of zinc. Enter your answer in scientific notation.?

[匿名]

回覆: 3

2018-01-26 8:16 pm

Can someone help me with my chem homework?

[匿名]

回覆: 2

2018-01-26 4:37 pm

Kinetics question chemistry- activation energy?

[匿名]

回覆: 1

2018-01-26 11:39 am

Calculate the number of oxygen atoms in 3.02x10^16 formula units of cuprous sulfate pentahydrate?

[匿名]

回覆: 4

2018-01-26 11:43 am

How many moles of CO are produced when 1.9 mol of C reacts?

[匿名]

回覆: 3

2018-01-26 9:54 am

How much NaOH is contained in 35.0 mL of a 1.10 M solution of NaOH in H2O?

[匿名]

回覆: 3

2018-01-26 9:47 am

The mass of single gold atom is 3.27x10^-22 g. What is this mass in pounds ?

[匿名]

回覆: 2

2018-01-26 9:07 am

Chemistry question (Awarding best answer)?

[匿名]

回覆: 1

2018-01-25 5:41 pm

What is the valencies of C in CO and CO2 And why?

[匿名]

回覆: 2

2018-01-25 12:33 am

Help with calculating the molarity of cation, anion, and pH?

[匿名]

回覆: 4

2018-01-24 1:06 pm

Can someone help me with finding the unknown element in this problem? I seriously need help!!!?

[匿名]

回覆: 3

2018-01-24 1:12 pm

cm^-1 to m^-1 Help with conversion please 7173.11(cm^-1) = _____(m^-1)?

[匿名]

回覆: 3

2018-01-24 10:15 am

Chemistry help?

[匿名]

回覆: 2

2018-01-24 10:36 am

Stuck on a bond energies question. Can someone please help?

[匿名]

回覆: 1

2018-01-24 2:59 am

How many mL of acid must be added to reach the equivalence point?

[匿名]

回覆: 3

2018-01-23 11:49 pm

If I have 1g/dm^-3 of stock solution, how would I obtain 2cm of 300μg/dm^-3?

[匿名]

回覆: 1

2018-01-23 11:04 pm

Coal, which is primarily carbon, can be converted to natural gas, primarily CH4, by the following exothermic reaction: C(s)+2H2(g)⇌CH4(g)?

[匿名]

回覆: 2

2018-01-23 1:53 pm

An airplane with a speed of 36 m/s is climbing upward at an angle of 54° with respect to the horizontal?

[匿名]

回覆: 1

2018-01-23 8:33 am

Chemistry Help?

[匿名]

回覆: 2

2018-01-23 8:49 am

What is the product formed when you mix 2-ethyl-3-methylpentanoic acid, and 2-propanol?

[匿名]

回覆: 2

2018-01-23 3:58 pm

Calculating molar heat of combustion?

[匿名]

回覆: 2

2018-01-23 3:16 pm

Is the nomenclature for this correct? If not, why?

[匿名]

回覆: 1

2018-01-23 12:20 pm

Chemistry please help! calculate an approximate atomic radius for gold.?

[匿名]

回覆: 5

2018-01-23 12:25 pm

50.23 miles to centimeters?

[匿名]

回覆: 2

2018-01-23 11:19 am

Use the limit process to find the slope of the tangent line.?

[匿名]

回覆: 7

2018-01-23 11:30 am

5.905 times 100.04 is closest to what?