不用客氣

[匿名]

回覆: 1

2018-01-23 11:04 am

Advanced Functions Question?

[匿名]

回覆: 2

2018-01-23 9:49 am

Which molecule has the strongest intermolecular force?

[匿名]

回覆: 1

2018-01-22 11:50 pm

Paracetamol can be synthesised by reacting 4-amino phenol with ethanoic anhydride according to the following equation?

[匿名]

回覆: 2

2018-01-22 11:10 pm

how many h atoms are in c2h6s?

[匿名]

回覆: 1

2018-01-22 3:59 pm

Quantitative Chemistry Questiom?

[匿名]

回覆: 1

2018-01-22 4:10 pm

Chemistry help?

[匿名]

回覆: 2

2018-01-22 12:54 pm

AP Chemistry Question?

[匿名]

回覆: 2

2018-01-22 11:17 am

How many total electrons are in P^-3 A. 18 B. 34 C. 15 D. 12?

[匿名]

回覆: 1

2018-01-21 2:20 am

I need help. What is the concentration in percent m/m if 3.6g of NaCl dissolved in 400mL of water?

[匿名]

回覆: 4

2018-01-20 5:30 pm

WHEN WAS NICKEL DISCOVERED?

[匿名]

回覆: 3

2018-01-21 12:37 am

The solubility of a compound in 35°C and 50°C is 60 and 80. 50g of saturated solution at 35°C is heated to 50°C.?

[匿名]

回覆: 1

2018-01-20 7:58 am

Consider the complete combustion of 5.53×10-1 moles of C5H8O with excess oxygen.?

[匿名]

回覆: 5

2018-01-20 12:49 am

physics circuits question pls help?

[匿名]

回覆: 7

2018-01-19 7:05 pm

If you have 1kg of wet snow, will you have 1l of water(1kg) after you u melt it?

[匿名]

回覆: 1

2018-01-19 10:40 am

Can someone plz help me with this!?

[匿名]

回覆: 2

2018-01-19 11:47 am

Chemistry genius needed?

[匿名]

回覆: 3

2018-01-19 12:36 pm

Does copper or zinc have a higher melting point?

[匿名]

回覆: 2

2018-01-18 7:42 am

Please help with physics? Thank you in advance!?

[匿名]

回覆: 3

2018-01-18 12:56 am

CHEM HELP PLS?

[匿名]

回覆: 2

2018-01-17 4:18 pm

Math help!!!!?

[匿名]

回覆: 3

2018-01-17 3:45 pm

Sig fig substraction help!? chem?

[匿名]

回覆: 2

2018-01-17 11:19 am

A 2.4 kg purse is dropped from the top of the leaning tower of Pisa and falls 55m before reaching the ground with a speed of 27 m/s.?

[匿名]

回覆: 2

2018-01-17 9:37 am

If a system does 1000J of work on its surrounding and 300J flows into dsystem.does the internal energy increase or decrease and by how much?

[匿名]

回覆: 3

2018-01-17 12:11 pm

From the list that follows, choose ALL of the polyatomic ions: Na+ O2- Al3+ OH- PO43- Mg2+ SO42- CN- Li+ Br-?

[匿名]

回覆: 1

2018-01-17 10:52 am

CHEMISTRY QUESTION?

[匿名]

回覆: 2

2018-01-17 10:25 am

Please help! Chemistry question!! What is the osmotic pressure in atm of a 0.50 M urea solution at 25 degrees Celsius?

[匿名]

回覆: 1

2018-01-17 8:48 am

Find the Area of the shaded region defined by the following system of equations?

[匿名]

回覆: 3

2018-01-17 8:13 am

Please help with physics? Thanks in advance!?

[匿名]

回覆: 1

2018-01-17 7:26 am

Chem problem, please help!!!!?

[匿名]

回覆: 1

2018-01-17 6:42 am

Empirical formula of this compound?

[匿名]

回覆: 11

2018-01-17 6:27 am

What’s the distance between-10.5 and 7 on a number line?

[匿名]

回覆: 3

2018-01-17 6:06 am

Zoe has a total of $4,000 invested in two accounts. One account pays 5 percent interest, and the other pays 8 percent interest.?

[匿名]

回覆: 3

2018-01-17 5:18 am

I need help with chemical homework.. I need to determine how many atoms are in each question...using the rules of cofficients and subscripts?

[匿名]

回覆: 2

2018-01-16 8:48 pm

Chemistry Questions...?

[匿名]

回覆: 3

2018-01-16 11:41 pm

Geometry Help?

[匿名]

回覆: 4

2018-01-16 11:45 pm

An angle measures 114.4 more than a supplementary angle. What is the measure of each angle?

[匿名]

回覆: 1

2018-01-16 9:07 pm

Chemistry Questions...?

[匿名]

回覆: 5

2018-01-16 7:33 pm

Find g(x^2) when g(x) = -4x + 2?

[匿名]

回覆: 2

2018-01-16 7:11 pm

Can someone please help me with steps?

[匿名]

回覆: 2

2018-01-16 6:58 pm

Given the mass ratios of iron to oxygen, which of the following samples could be the mineral hematite, Fe2O3?

[匿名]

回覆: 3

2018-01-16 1:53 pm

N2(g) + 2O2(g) --> N2O4(g)?

[匿名]

回覆: 2

2018-01-13 5:03 pm

Integration?

[匿名]

回覆: 2

2018-01-13 4:54 pm

With th empirical formula of this compound, for 1 mol of elemnt A and 2.52 mol for element B, do I round off the 2.52 to 2 or 3? AB2 or AB3?

[匿名]

回覆: 1

2018-01-13 3:24 pm

5 chem review questions?

[匿名]

回覆: 1

2018-01-13 12:50 pm

Rank the following in order of decreasing bond energy: SeI3, SeF3, SeCl3. (Using <, >, & =) Thanks!?

[匿名]

回覆: 1

2018-01-13 1:31 am

Chemistry Organic Question?

[匿名]

回覆: 1

2018-01-12 11:15 pm

chemistry question?

[匿名]

回覆: 6

2018-01-12 6:03 pm

Solve: 1/3(x-5)+2/15(x-1)=1/5(x+3)?

[匿名]

回覆: 2

2018-01-12 4:44 pm

a racer completes a 500km in exactly 2hr and 15 min. what is the average speed of the car in kilometers per hour and meters per second?

[匿名]

回覆: 4

2018-01-12 5:16 pm

Solve the triangle. A = 32°, a = 19, b = 12?