老爺子

[匿名]

回覆: 3

2020-10-06 5:43 pm

math help please?

[匿名]

回覆: 2

2020-09-28 2:27 pm

Chemistry  Help ?

[匿名]

回覆: 2

2020-09-22 1:07 pm

The reactant concentration in a first-order reaction was 7.10×10−2 M after 30.0 s and 6.00×10−3 M after 60.0 s . ?

[匿名]

回覆: 3

2020-09-16 12:10 am

please help with the last 2?

[匿名]

回覆: 2

2020-09-10 10:49 pm

Compute the wavelength of an X-ray with a frequency of 7.0 1018 Hz.?

Mcc

回覆: 6

2020-09-07 11:15 pm

Factor Theorem Algebra Questions?

[匿名]

回覆: 1

2020-09-02 12:44 pm

What is the rate constant at 250K? Please Help?

[匿名]

回覆: 2

2020-08-27 9:15 pm

what is the distance between P and the position of the ball strike the wall?u is 20ms-1 and the angle is 40 degree?

[匿名]

回覆: 2

2020-06-07 3:59 pm

The graph of y=ax²+c has its vertex at (0,4) and passes through the point (3,-5). Find the value of a.?

[匿名]

回覆: 2

2020-06-07 2:15 pm

If the graph of y = |x| is translated so that the point (1, 1) is moved to (4, 1), what is the equation of the new graph?

[匿名]

回覆: 2

2020-06-07 2:39 pm

pls help asap?

[匿名]

回覆: 2

2020-05-25 8:46 pm

How do I prove tan(theta/2)= sin(theta)/1+cos(theta) for theta in quadrant one?

[匿名]

回覆: 1

2020-05-25 6:55 pm

Please help answer?

[匿名]

回覆: 3

2020-05-24 11:08 am

Calculus HW help!?

[匿名]

回覆: 1

2020-05-24 11:13 am

If 4.2 moles of Bromine reacts with excess sodium iodide, how many moles of sodium bromide will be produced?

[匿名]

回覆: 3

2020-05-12 5:22 pm

What is the magnitude of the potential difference across the 5- resistor?

[匿名]

回覆: 2

2020-05-12 1:12 pm

Which of the following reactions would result in decreased entropy?

[匿名]

回覆: 4

2020-05-12 2:10 pm

(-3, -2) (-2, -3) (-4, -3) ?

[匿名]

回覆: 7

2020-05-12 12:57 pm

 Can someone please solve this? ?

[匿名]

回覆: 2

2020-04-29 1:08 pm

A sample of trifluoroacetic acid, C2HF3O2, contains 40.5 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.?

[匿名]

回覆: 5

2020-04-29 11:54 am

Find [ (√3 + i)/2 ]⁶ + [ ( i - √3)/2 ]⁶ .?

[匿名]

回覆: 2

2020-04-29 11:19 am

How many moles of oxygen will occupy 728 al 760 mm Hg and 25C? please keep 3 significant figures ?

[匿名]

回覆: 1

2020-04-17 12:57 pm

According to Reference Table V, which of these acids has the smallest ionization constant (Ka )? A) HCl B) HBr C) HNO2 D) HNO3?

[匿名]

回覆: 2

2020-04-17 12:55 pm

 How much energy, in calories, is released as 190g water is cooled from 55.0°C to 12.0°C?

[匿名]

回覆: 3

2020-04-17 12:45 pm

A fair coin is flipped three times. What is the probability that tails occur exactly 1 time if it is known that tails occur at least once? ?

[匿名]

回覆: 1

2020-04-12 10:34 pm

classify each of the following as a primary secondary or tertiary alcohol?

[匿名]

回覆: 1

2020-04-12 10:03 pm

Mathematical Induction ABC Questions?

[匿名]

回覆: 1

2020-04-12 9:21 pm

A buffer is made by adding 0.300 mol CH3COOH nd 0.300 mol CH3COONa to enough water to make 1.000 M of solution. The pH of the buffer is 4.7?

[匿名]

回覆: 1

2020-04-12 7:34 pm

A hiker is climbing a mountain that forms an incline angle of 65° with level ground. ?

[匿名]

回覆: 2

2020-04-07 9:15 pm

Which of the following will not react with hydrobromic acid?

[匿名]

回覆: 2

2020-04-07 9:04 pm

Evaluate the problem in the photo given ?

[匿名]

回覆: 4

2020-04-07 7:35 pm

Which of the following is a covalent compound?

[匿名]

回覆: 7

2020-04-03 8:34 pm

The ratio of the length of a rectangle to its width is 5:4. If the width is 35 cm ,find the length. ?

[匿名]

回覆: 7

2020-04-03 2:29 pm

Sum and Difference Identities?

[匿名]

回覆: 1

2020-04-03 11:53 am

chemistry ?

[匿名]

回覆: 1

2016-06-30 7:50 pm

Use the Law of Cosines to solve the triangle. Round your answers to two decimal places.?

[匿名]

回覆: 2

2016-04-22 4:42 pm

x+2y+3z=2x-y=3x+5y-6z xyz不為0 求x:y:z=?

[匿名]

回覆: 1

2015-10-02 1:14 pm

A(-3)且AB=5求B?

[匿名]

回覆: 3

2015-08-29 12:43 pm

Find the relation between m and c if the line y = mx + c is a tangent to the curve y^2 = 2x?

[匿名]

回覆: 5

2015-05-30 9:24 pm

高一條件機率

[匿名]

回覆: 3

2015-05-23 11:11 pm

老師出的數學問題，我不會，請幫忙！

Chantal

回覆: 2

2015-04-26 4:46 am

急急急!!! 4條中三化學問題, 謝謝!

adam!

回覆: 1

2015-03-11 2:14 am

共振結構的相關問題

真

回覆: 2

2015-03-02 7:29 am

Chem+Analytical Chem question

神秘人

回覆: 2

2015-02-11 9:06 pm

高二數學求解答(20分) (如圖)

[匿名]

回覆: 2

2015-01-04 3:29 am

高一的指數對數問題

adam!

回覆: 3

2014-12-29 8:56 am

有機化學 形式電荷的問題

[匿名]

回覆: 2

2014-09-15 4:53 pm

坐標移動速率的題目怎麼解??

[匿名]

回覆: 2

2014-08-06 5:02 am

F.4 Chem pH value

[匿名]

回覆: 3

2014-07-25 3:26 pm

高中化學~層析跟傾析的異同之處