胡雪8°

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回覆: 3

2018-03-17 6:41 pm

Coefficient of Friction?

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回覆: 4

2018-03-16 4:25 pm

When crystal of copper sulphate are strongly heated the Residue obtained is what?

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2018-03-16 11:42 am

How many photons of electromagnetic radiation of frequency 4.56 MHz are needed to have a total energy of 5.4J?

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2018-03-16 12:40 am

how to prepare 100 ml of 0.4 N Naoh?

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2018-03-15 12:42 pm

Help balancing these chemical reactions for basic/acidic conditions?

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2018-03-15 2:27 pm

what is the angle of reflection when light enters parallel to the mirror?

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2018-03-15 3:30 pm

How to evaluate the expression (2.6)+(8-4)+1?

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2018-03-14 10:41 pm

is 16:60 and 4:15 equivalent?

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2018-03-14 9:52 pm

Draw the structure of NCNH2, the atoms are connected as shown in the formula. Minimize the formal charges and include all lone pairs.?

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2018-03-14 4:54 pm

why iron, cobalt and nickle do not form typical interstitial carbides? what are the carbides they form?

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2018-03-14 2:24 pm

Trigonometry Vectors in the Plane Question, Please Help?

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2018-03-14 2:21 pm

Please help me with indices. Thanks in advance?

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回覆: 2

2018-03-13 11:33 pm

A heat transfer of 8.0×105 J is required to convert a block of ice at -15 ∘C to water at 15 ∘C. How to find the mass?

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2018-03-13 12:58 pm

Describe nuclear equations?

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2018-03-13 1:21 pm

chem lab question!?

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2018-03-13 1:26 pm

You have 75.0 mL of 0.125 M HNO3 to which you add 75.0 mL of 0.100 M KOH. What is the resulting pH of the solution?

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回覆: 3

2018-03-12 8:36 pm

The median of a set of six consecutive integers is 29/2. What is the value of the smallest integer in the set? Best answer?

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回覆: 2

2018-03-12 8:53 am

Chemistry Help?

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2018-03-12 1:05 pm

chem help?

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2018-03-12 12:19 pm

Pre-Calc: Bearing Lookout Problem?

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2018-03-12 12:03 pm

Write the equation of the line that passes through: (1,-4) and (5,3)?

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2018-03-12 8:53 am

How many moles of BaCl2 are formed in the neutralization of 393 mL of 0.171 M Ba(OH)2 with aqueous HCl?

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2018-03-10 11:08 pm

The compound NOCl decomposes to nitric oxide and chlorine according to the following equation?

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2018-03-10 11:04 pm

CHEM HELP??? 6 multiple choice questions?

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2018-03-09 8:27 pm

Chemistry help?

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2018-03-09 1:06 pm

the total volume of seawater is 1.5 x 10^21 L?

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2018-03-08 11:25 pm

Double Angle Formulas Help?

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2018-03-08 11:11 pm

****** ## What is the ratio * + # to * = 6 + 2 : 6. Can you simpify further?

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2018-03-08 6:02 pm

Trouble with Understanding Redox Chemistry?

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2018-03-08 4:33 pm

Simple organic chem question?

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2018-03-08 3:38 pm

The pH of this solution is what?

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2018-03-08 1:31 pm

Help with equation?

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回覆: 5

2018-03-07 7:08 pm

Math Question?

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2018-03-07 12:25 pm

chemistry help! MCQ organic question?

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2018-03-07 3:14 pm

A 120 ml flask contains 2.7 micrograms of O2 at 17 degrees celsius. What is the pressure in the flask?

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2018-03-06 7:50 pm

Can someone help me with this chemistry problem?

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2018-03-06 2:00 pm

what are the concentrations (M) of Fe3+ and I- obtained by dissolving .200 mol FeI2 in water and diluting to 725ml?

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2018-03-04 10:42 pm

what device do i use to measure the transmittance and absorbance of light of a sample?

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2018-03-04 10:41 pm

Using 273.15 K as the value for Zero degree Celsius convert 45.1° C to Kelvin. 6.05 K 318 K 318.3 K 1.23 x 104 K?

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2018-03-02 11:59 pm

Is there 6.02x10^23 atoms in 0.5 mole of oxygen. If so, how? Isn’t there 6.02x10^23 atoms in every ONE mole of a substance?

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2018-03-02 7:35 pm

How to synthesise indane from Benzene ?

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2018-03-02 7:21 pm

INTEGRATION of sinx/root(36-cos^2x)?

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2018-03-02 12:41 pm

Physics problem. Rotational Equilibrium.?

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2018-03-02 11:32 am

Simplifying Trig Equation Problems! Please Help!!?

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2018-03-02 2:17 am

lithium sulfate and lead(II) acetate. Express your answer as a chemical equation.?

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2018-02-28 8:41 pm

Problem involving chemical equilbrium?

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2018-02-27 9:48 pm

What is the H+ concentration in mol dm-3 in a solution of pH 4.3 ?

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2018-02-25 9:21 am

Calculate the molaraty of the H2SO4 solution if 16.45 Ml of NaOH was necessary to reach the end point of titration.?

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2018-02-25 1:43 am

How do u solve this chemistry electrolysis question?

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2018-02-23 9:23 am

How many titanium atoms are in a pure titanium bicycle frame with a mass of 1.50 kg?