賣女孩的火柴

[匿名]

回覆: 1

2016-02-26 12:19 pm

Using Integrated Rate Laws?

[匿名]

回覆: 7

2016-02-26 7:31 am

Chemistry: chemical formulas?

[匿名]

回覆: 1

2016-02-26 6:43 am

Determine the pH of a 0.5M solution of oxalic acid, using only Ka1.?

[匿名]

回覆: 2

2016-02-26 6:47 am

chemistry?

[匿名]

回覆: 1

2016-02-26 4:10 am

Physics question!!?

[匿名]

回覆: 2

2016-02-24 7:25 am

蛋殼是否水溶性钙肥?

[匿名]

回覆: 2

2016-02-25 3:38 pm

國小數學問題一問 （我有解法，但不知如何解釋） 籃球隊有五名球員ABCDE，由於某種原因，C不能當中鋒，而其餘四人可以分配到五個位置中任一個，則有多少種不同的站位方法? 解法：６Ｘ４Ｘ（５－１）＝９６種 請各位大大幫忙，感謝了。?

[匿名]

回覆: 2

2016-02-25 6:19 pm

what is the mass of grams of 100 atoms of the carbon-12 isotope?

[匿名]

回覆: 1

2016-02-25 6:04 pm

How many Uranium-236 atoms are there having a mass of 1 kg?

[匿名]

回覆: 1

2016-02-25 6:05 pm

Why materials contain benzene ring in their backbone structure are difficult to break? is it due to double bonds movement makes mat. strong?

tom

回覆: 3

2016-02-25 5:45 pm

can someone help me with this physics question please?

[匿名]

回覆: 1

2016-02-25 5:48 pm

how to rewrite using a base of 5 log small 3 (7)?

[匿名]

回覆: 2

2016-02-25 5:36 pm

How do you work out this maths question?

[匿名]

回覆: 1

2016-02-25 5:00 pm

Let P(x) = F(x)G(x) and Q(x) = F(x)/G(x), where F and G are the functions whose graphs are shown.?

[匿名]

回覆: 1

2016-02-25 4:46 pm

1/5 * 2/7 * 5/9 in simplest form?

[匿名]

回覆: 1

2016-02-25 3:02 pm

H2O(g) + CO(g) equilibrium reaction arrow CO2(g) + H2(g) The forward reaction above is exothermic.?

[匿名]

回覆: 6

2016-02-25 4:08 pm

At constant temperature and pressure, gas volume is directly proportional to the?

pui

回覆: 1

2016-02-18 5:15 pm

兩題化學長答題不懂?

[匿名]

回覆: 3

2016-02-19 5:00 am

求等比數列首9項之和?

[匿名]

回覆: 1

2016-02-14 9:30 am

2x-3二次方=9分支4?

[匿名]

回覆: 1

2016-02-11 1:54 pm

甲、乙兩底和相等的梯形，甲面積是乙面積的4倍，則甲高是乙高的幾倍？

[匿名]

回覆: 1

2016-02-09 11:56 am

一條排列＆組合求概率既問題?

[匿名]

回覆: 1

2016-02-01 3:57 pm

(TT)(TT)(TT)?

[匿名]

回覆: 1

2016-01-30 5:59 am

Help me! Maths?

[匿名]

回覆: 1

2016-01-22 10:30 am

請問?y=ax^2+ bx+c斜率不是-a/b嗎? 那b>0 m>0是? 因為當a>0 m>0 b<0 才會符合-a/b這麼公式?

Lim Pay

回覆: 1

2016-01-05 1:59 pm

有 pH 值均為 3 之鹽酸及醋酸兩溶液各 1 L，如果將此兩溶液分別用水稀釋至 2 L，溶液所含 H+的濃度 鹽酸__醋酸(大小於)?

[匿名]

回覆: 1

2015-12-22 2:52 pm

草酸可以和多倫試劑反應嗎?

[匿名]

回覆: 1

2015-12-20 10:20 am

請問有機命名，前面不是用1,2,3...等等數字表示順序嗎？如出現alfa,beta 是代表什麼呢？謝謝～～?

[匿名]

回覆: 1

2015-11-28 5:33 am

化學科酸和鹽基問題?

[匿名]

回覆: 1

2015-11-09 8:45 am

0.1M18ml醋酸和0.1M12ml醋酸鈉形成緩衝溶液請問PH值多少?

[匿名]

回覆: 1

2015-11-09 3:52 pm

請問什麼是allylic hydrogen和benzylic hydrogen呢？

[匿名]

回覆: 1

2015-10-27 1:13 pm

世界上最大細胞是鴕鳥蛋，直徑約15公分，而人類卵細胞的直徑約200微米，則駝鳥蛋的直徑是人類卵細胞直徑的幾倍?(用科學記號表示)?

[匿名]

回覆: 1

2015-10-10 4:21 am

國一數學，指數律，急！?

[匿名]

回覆: 1

2015-10-09 2:17 pm

1 .已知a等於2的2次方乘以3的3次方5的m次方，若a是七十五的倍數，但不是兩百五十的倍數，則m等於【？】 2 . 已知a等於2940，(a.b)等於30，[a.b]等於2的2次方乘以3乘以5的2次方乘以7的2次方，則b等於【？】?

[匿名]

回覆: 1

2015-09-30 1:04 pm

微積分應用題目，請問圈起來的怎麼解?

[匿名]

回覆: 2

2015-09-20 11:11 am

0~9 共十個數字，選出三個相異數字組成百位數，請問3的倍數共有幾個解答？

[匿名]

回覆: 2

2015-09-10 2:21 pm

23設A B為兩多項式 https://www.flickr.com/photos/101292575@N06/21264522632/in/dateposted-public/?

[匿名]

回覆: 2

2015-09-09 4:14 pm

問一元一次的不等式 -6x+x>9x+58 11(x+4)-19<6x 8(x-1)<-4x+16 希望高手解?

[匿名]

回覆: 13

2015-09-05 1:05 pm

Chemistry question! A chemist needs 4.4g of a liquid solution with a density of 1.1g/mL. What volume of liquid is required?

[匿名]

回覆: 2

2015-09-05 2:41 pm

國中數學問題~求解~?

[匿名]

回覆: 1

2015-09-05 6:07 am

A maths question?

[匿名]

回覆: 2

2015-09-05 8:08 am

用長15公分寬12公分的長方形,拼成一個正方形,正方形邊長最小是幾公分?需要幾個正方形才能拼成?

[匿名]

回覆: 3

2015-09-05 9:46 am

find the number of solutions to the equation 2x+5y=2015 where x and y are positive integers?

mandy

回覆: 1

2015-09-04 7:14 pm

Ideal gas?

[匿名]

回覆: 2

2015-09-04 6:11 pm

Chemistry Question help please?

[匿名]

回覆: 3

2015-09-04 4:55 pm

Calculate the mole fraction?

[匿名]

回覆: 3

2015-09-04 5:31 pm

Rank the following compounds in order of decreasing boiling point: potassium fluoride (KF), acetylene (C2H2), and iodomethane (CH3I)?

[匿名]

回覆: 1

2015-09-04 2:21 pm

因式分解： x的三次方-108? 4x的二次方-y平方+8x+4y? x的四次方-11x平方-80? 展開： (a-1)(a+1)(a平方+1)(a的四次方+1)=? 作圖： 他給一條長度為2單位的長度，叫我畫出4/5單位長，為何老師講解時是畫平行線在第二個上面而不第四個，請解釋?

[匿名]

回覆: 2

2015-09-03 8:52 pm

請問如何計算,可以的也請列圖+化學公式並茂,謝謝?

[匿名]

回覆: 1

2015-09-03 8:56 pm

Can I ask how to tackle this question? I will appreciate if you can provide both drawing procedures and chemical equations.Thank you.?