胡雪8°

[匿名]

回覆: 3

2019-02-25 8:34 pm

What is the mole ration of o2 to co2?

[匿名]

回覆: 1

2019-02-25 7:58 pm

a 10.0mL sample of mercury weighs 135.5g. Calculate the density of the mercury sample and express your answer in SI units for density.?

[匿名]

回覆: 4

2019-02-25 6:46 pm

if y=1-tanx/1+tanx find dy?dx?

[匿名]

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2019-02-25 5:40 pm

A sample of neon occupies a volume of 461 mL at STP. What will be the volume of the neon when?

[匿名]

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2019-02-25 4:53 pm

Need help with this chemistry dimensional analysis problem!?

[匿名]

回覆: 2

2019-02-25 2:13 pm

Need help on this question and on how to solve?

[匿名]

回覆: 1

2019-02-25 3:07 pm

CHEMISTRY HELP: MOLAR MASS BOILING POINT?

[匿名]

回覆: 3

2019-02-25 2:36 pm

What is the molar mass of a gas that has a density of 1.25 g/L? If the gas is comprised of a single element, what would that element be?

[匿名]

回覆: 1

2019-02-25 12:33 pm

;-; pls help me?

[匿名]

回覆: 1

2019-02-25 12:33 pm

Question text How many kilograms are in 9.70 x 10-4 moles of titanium? .?

[匿名]

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2019-02-25 1:39 am

A Gas expands and does PV work on its surroundings equal to 334 J. At the same time, it absorbs 126J of heat from the surroundings.?

[匿名]

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2019-02-25 12:48 am

What is 2sin(x)=tan(x/2)?

[匿名]

回覆: 3

2019-02-25 12:27 am

Evaluate 10 C 7 and 9 P 3?

[匿名]

回覆: 1

2019-02-25 12:03 am

If 50.0 g of H2 and 100.0 g of O2 react how many moles of H2O can be produced in the reaction below? 2H2(g) + O2(g) -> 2H2O(g)?

[匿名]

回覆: 1

2019-02-24 10:55 pm

Calculate the osmotic pressure of each of the following aqueous solutions at 20.00°C?

[匿名]

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2019-02-24 10:56 pm

Determine the molarity of each of the following solutions from its osmotic pressure at 25°C.?

[匿名]

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2019-02-24 10:59 pm

A 181 mg sample of a nonelectrolyte isolated from throat lozenges was dissolved in enough water to make 10.0 mL of solution at 25°C.?

[匿名]

回覆: 4

2019-02-24 8:27 pm

Probability help!?

[匿名]

回覆: 1

2019-02-24 9:01 am

Chemistry homework help?

[匿名]

回覆: 1

2019-02-23 3:10 pm

Given K = 3.45 at 45°C for the reaction A(g) + B(g) equilibrium reaction arrow C(g)?

[匿名]

回覆: 4

2019-02-23 10:35 pm

which of the following is the solution to the equation in terms of the unknown constant a 8^(x-2a)= 1/2^(5a) x=1/3a x=5/2a x=-1/2a or x=-a?

[匿名]

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2019-02-23 1:07 pm

balanced equation for aluminum chloride + calcium hydroxide =aluminum hydroxide + calcium chloride?

[匿名]

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2019-02-20 10:47 pm

Write the balanced formula equation for this reaction: HNO3 + NH3 → Enter your answer as the sum of coefficients.?

[匿名]

回覆: 3

2019-02-20 3:06 pm

Where am I going wrong on this integrated rate law problem?

用戶46031

回覆: 1

2019-02-20 3:33 pm

Please help?

[匿名]

回覆: 1

2019-02-20 1:55 pm

What volume of H2(g) is produced when 6.70 g of Al(s) reacts at STP? 2Al(s)+6HCl(aq) ---->2AlCl3(aq)+3H2(g)?

[匿名]

回覆: 1

2019-02-20 1:31 pm

Help with chemistry question! 10 its Rate of formation?

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回覆: 5

2019-02-20 11:07 am

Insert five numbers between 0.125 and 8 so that the seven numbers form a geometric sequence.?

[匿名]

回覆: 2

2019-02-20 7:07 am

osmotic pressure?

[匿名]

回覆: 3

2019-02-20 9:43 am

Chem 102!!?

[匿名]

回覆: 1

2019-02-20 9:07 am

Compute the pKa of HAc.?

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回覆: 2

2019-02-20 12:57 am

Physics momentum question?

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回覆: 2

2019-02-20 12:46 am

stoichiometry help please?

[匿名]

回覆: 1

2019-02-20 12:26 am

Ammonia gas occupies a volume of 57.9 L at a pressure of 532.4 atm. If the pressure were lowered to 256.8 atm, what would the new volume be?

[匿名]

回覆: 4

2019-02-19 10:56 pm

Can someone help me with this geometry problem?

[匿名]

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2019-02-19 12:00 pm

Consider the reactionCH4(g) + CCl4(g) → 2CH2Cl2(g) Given an initial mass of 17.02 g CH4, an excess of CCl4, and assuming that all of the reactant is converted to product(s), and none is lost, calculate the mass (g) of CH2Cl2 produced by the reaction.?

[匿名]

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2019-02-19 8:41 pm

A volume of 80.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4).?

[匿名]

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2019-02-19 8:11 pm

What is the mole fraction of LiCl in a mixture of 0.564g NaCl, 1.52g KCl and 0.857g LiCl?

[匿名]

回覆: 1

2019-02-19 6:33 pm

I can't do this kinetic energy question. I've got the mark scheme but I still don't get it. Please help!?

[匿名]

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2019-02-19 3:22 pm

Which compound is more soluble in the given solvent, and WHY?

[匿名]

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2019-02-13 5:22 pm

Need help with chem problems?

[匿名]

回覆: 1

2019-02-13 8:15 am

Nitrogen gas from decomposition problem. Please show how to do this?

[匿名]

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2019-02-13 12:55 pm

Help, how do you solve this?

[匿名]

回覆: 2

2019-02-06 8:42 pm

The density of a certain gas at 27.0°C and 98.66 kPa is 2.53 g/L. Calculate the molecular mass.?

[匿名]

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2019-02-06 9:35 pm

is group 1 and 6 a ionic compound or molecular?

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2019-02-05 10:51 pm

KO2 - (ox. number oxygen - 1/2) is used to produce O2 in space expeditions by using CO2 according to?

[匿名]

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2019-02-04 1:50 pm

A 2 kg box is sliding across ice at 2 m/s. If 40 J of work is done on the box ...?

[匿名]

回覆: 4

2019-01-12 7:16 pm

Prove that cosec2A+cosec4A+cosec8A=cotA-cot8A?

[匿名]

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2018-12-04 2:14 pm

How does the lewis structure for XeSe4 look like?

[匿名]

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2018-09-16 11:45 pm

What macro-molecule is made up of only H and C and is not soluble in water?