andrew

用戶89046

回覆: 2

2021-02-25 12:03 am

Find the IUPAC name?

[匿名]

回覆: 1

2020-10-25 12:01 am

Chemistry- equilibrium concentration?

[匿名]

回覆: 1

2020-10-21 5:51 am

Chemistry question help?

[匿名]

回覆: 3

2020-10-06 5:07 pm

aCO3 + 2HCl --> CaCl2 + CO2 + H2O?

[匿名]

回覆: 2

2020-10-06 4:55 pm

Help on this question?

[匿名]

回覆: 2

2020-10-06 1:38 pm

What is the cell reaction for the following electrochemical cell? Cu | Cu2+(aq) || Mn2+(aq) | Mn?

jk

回覆: 2

2020-09-27 6:51 pm

如何用快的方法計出 '當20100123除以30時，餘數是多少'？

[匿名]

回覆: 1

2020-09-27 2:49 pm

An electron in the = 6 level of the hydrogen atom relaxes to a lower energy level, emitting light of = 410nm . ?

[匿名]

回覆: 3

2020-09-26 10:55 pm

Help me solve the system below?

[匿名]

回覆: 1

2020-09-22 1:31 pm

 Find the magnitude of the vector sum r of the vector displacements c and d ?

[匿名]

回覆: 1

2020-09-22 1:33 pm

Components Vector Sum Difference?

[匿名]

回覆: 1

2020-09-22 10:25 am

What wavelength (in nm) is observed when an electron in a helium atom transitions from n=3 to n=2?

[匿名]

回覆: 1

2020-09-21 11:50 pm

Help Physics  Homework ?

[匿名]

回覆: 1

2020-09-15 11:41 pm

Chemistry Acids and Bases?

[匿名]

回覆: 1

2020-09-15 11:41 pm

Chemistry Acid and Bases?

[匿名]

回覆: 3

2020-09-15 2:23 pm

10th Grade Chemistry Help?

[匿名]

回覆: 1

2020-09-10 10:26 pm

Given the following limits, calculate the limits below, if they exist.? ?

[匿名]

回覆: 4

2020-09-10 8:53 pm

Math problem related to pythagorean theorem?

[匿名]

回覆: 3

2020-09-10 9:50 pm

SAT math help ?

[匿名]

回覆: 2

2020-09-10 9:51 pm

Computer the wavelength of the radio waves from the following stations. An AM station operating with a frequency of 780 KHz?

Mcc

回覆: 2

2020-09-07 11:19 pm

Remainder Theorem Question?

[匿名]

回覆: 2

2020-09-07 8:53 pm

What did you observe when you added sulphite ions to acidified vanadium(V) solution?

[匿名]

回覆: 6

2020-09-07 6:47 pm

When methane is completely combusted in oxygen forming carbon dioxide and water how does the mass of the reactant gases compare to  product?

[匿名]

回覆: 3

2020-09-02 2:31 am

What is the density of lithium metal (in g/cm3) if a cube measuring 0.82 cm × 1.45 cm × 1.25 cm has a mass of 0.794 g?

[匿名]

回覆: 2

2020-09-02 2:36 am

Predict the formula for the compounds formed from the combinations of ions of the following elements:?

[匿名]

回覆: 1

2020-09-02 1:02 am

What is the mass number of an atom that has 4 protons, 4 electrons and 5 neutrons?

[匿名]

回覆: 2

2020-09-01 11:37 pm

plss help me solve this problem?

[匿名]

回覆: 2

2020-09-01 11:59 pm

Please help i am horrible at Stoichiometry?

Irene

回覆: 4

2020-08-27 5:57 pm

A coin is biased so that the probability of obtaining a head is 0.6. ?

[匿名]

回覆: 2

2020-08-27 12:21 am

 Find the average value of the function f(x)=1/√x on the interval [1,9]?

[匿名]

回覆: 8

2020-08-27 12:18 am

is light a particle or a wave?

[匿名]

回覆: 5

2020-08-26 11:58 pm

What are the three possible number of solutions for a quadratic equation? Describe the x-intercept(s) for each type of solution.?

[匿名]

回覆: 2

2020-05-20 3:12 pm

Find the derivative of the given function. Assume a is a constant. ?

[匿名]

回覆: 1

2020-05-20 2:46 pm

Which equation represents conservation of charger? 1)I- +2e- -->I2 2)2I- -->I2+2e- 3)Br2-->2Br- +2e- 4)Br+2e- -->Br-?

[匿名]

回覆: 1

2020-05-11 2:36 pm

Chm question?

[匿名]

回覆: 1

2020-05-11 3:33 pm

31 grams of KNO3 are dissolved?

[匿名]

回覆: 1

2020-05-10 10:34 am

Chm question?

[匿名]

回覆: 2

2020-04-27 11:08 pm

Calculate the percentage of uranium in the sample. Thank you!!?

[匿名]

回覆: 1

2020-04-27 10:38 pm

What mass of helium gas is present in a 13.3-L sample of this mixture at 264 K ?

[匿名]

回覆: 1

2020-04-27 8:14 pm

Chemistry Help Asap ?

[匿名]

回覆: 4

2020-04-27 8:30 pm

Suggest why platinum is used as a catalyst even though it is a very expensive metal.?

[匿名]

回覆: 1

2020-04-27 8:04 pm

Chemistry Help 2 Parts?

[匿名]

回覆: 2

2020-04-15 6:32 pm

pls help asap?

[匿名]

回覆: 2

2020-04-15 1:04 pm

What is the [OH-] in a 0.25M hypobromous acid(HOBr) solution?Ka=2.5x10^-9  Here are the choices:?

[匿名]

回覆: 1

2020-04-15 5:55 pm

pls help asap?

[匿名]

回覆: 1

2020-04-12 1:41 pm

Ap Chemistry?

[匿名]

回覆: 1

2020-04-12 1:42 pm

AP Chem help?

[匿名]

回覆: 1

2020-04-12 1:45 pm

Chemistry help!!?

[匿名]

回覆: 1

2020-04-10 11:53 pm

chem help?

[匿名]

回覆: 3

2020-04-07 2:16 pm

Polygon where one side is 110°, the others are 5x° and 2x°. How do I find x?