wanszeto

[匿名]

回覆: 1

2017-07-25 10:51 pm

Chemistry help needed badly?

[匿名]

回覆: 1

2017-07-25 9:38 pm

Which statement is true for a reaction at equilibrium?

[匿名]

回覆: 2

2017-07-25 8:33 am

which bond is most polar? C-Si ,O-Cl ,I-Br , As-Cl?

[匿名]

回覆: 3

2017-07-24 10:57 am

Which of the following is true of physical properties?

[匿名]

回覆: 1

2017-07-19 4:54 pm

URGENT !! Plz solve below question based on the concept of displacement in nth second in physics.?

[匿名]

回覆: 9

2017-07-18 1:33 pm

If tan25=a , than tan 205 _ tan115/ tan 245 + tan 335 =? , the given value is in degree?

[匿名]

回覆: 3

2017-07-18 1:31 am

Suppose a piece of silver jewelry contains 7.74×1022 atoms of silver (Ag) How many moles of silver atoms are in the piece of jewelry?

[匿名]

回覆: 1

2017-07-15 4:13 pm

Determine Solubility of Silver Chromate (Ag2CrO4) in water at 25'C Ksp=2.2E-12?

[匿名]

回覆: 2

2017-07-10 3:53 pm

If the equilibrium constant for the reaction?

[匿名]

回覆: 1

2017-07-06 8:44 pm

Chemistry homework help?

[匿名]

回覆: 3

2017-07-04 1:01 pm

molecular geomatry shape of h2c2o4?

[匿名]

回覆: 1

2017-06-29 5:12 pm

What is the vapour pressure of a solution by mixing 35g of solid Na2SO4 with 175ml of water at 25?

[匿名]

回覆: 4

2017-06-08 10:37 pm

HELP!! Geometry?

[匿名]

回覆: 1

2017-06-07 1:34 pm

Need help for my Final.?

[匿名]

回覆: 3

2017-06-04 12:49 am

(m/2)^0.5 x (m/2)^0.5 = 35.4 solve for m?

[匿名]

回覆: 1

2017-06-03 1:21 pm

Which of these solutions has the lowest freezing point? 0.25 M NaCl 0.5 M NaCl 1.0 M NaCl 1.5 M NaCl 2.0 M NaCl?

[匿名]

回覆: 5

2017-05-28 12:04 pm

Which lengths could be the sides of a triangle?

[匿名]

回覆: 1

2017-05-24 11:11 pm

how many atoms of iron are in 2.8 moles of... FeWO4 Fe3O4 FeS2 Fe2O3?

[匿名]

回覆: 2

2017-05-19 11:53 pm

If 89.6 joules of heat are needed to heat 20.0 grams of iron from 30.0°C to 40.0°C, what is the specific heat of the iron in J/g⋅°C?

[匿名]

回覆: 1

2017-05-17 3:12 pm

what metallic compound would you predict forms when sulfuric acid reacts with magnesium metal?

[匿名]

回覆: 3

2017-05-17 12:54 am

Chemistry help please?

[匿名]

回覆: 3

2017-05-10 5:33 pm

Calculate the area of figure, that is limited by the parabola and line: y = -x ^2 + 6x - 5; y = x - 5?

[匿名]

回覆: 2

2017-05-10 8:33 am

why does CCl4 have a higher boiling point than BrF?

[匿名]

回覆: 2

2017-05-10 12:41 am

Choose which of the following is the reducing agent in the reaction: HNO3 + HI --> NO + I2 + H2O?

[匿名]

回覆: 1

2017-05-09 1:52 pm

Consider the following reaction. 3H2(g) + WO3(s) → 3H2O(....?

[匿名]

回覆: 1

2017-05-06 12:23 pm

Chem help please?

[匿名]

回覆: 2

2017-04-26 9:33 am

What pressure is required to achieve a CO2 concentration of 9.90×10−2M at 20∘C?

[匿名]

回覆: 2

2017-04-26 1:10 am

What is the mole fraction of naphthalene in a solution made of 15.00 g of naphthalene (c10h8) and 50.0g of hexane (c6h14)?

[匿名]

回覆: 1

2017-04-25 6:09 pm

Chemistry The Mole Question?

[匿名]

回覆: 1

2017-04-25 12:50 am

solution A has a hydronium ion concentration of 3.8 X 10^-8 M. Solution B has a hydronium ion concentration of 2.5 X 10^-4 M.?

[匿名]

回覆: 1

2017-04-15 11:28 pm

Mg(s) + 2 HCl(aq)  MgCl2 (aq) + H2(g) a. What volume of 15.7 M hydrochloric acid will react with 2.1 grams of Mg?

[匿名]

回覆: 5

2017-04-12 1:31 pm

HELP WITH MATHS NEEDED?

[匿名]

回覆: 5

2017-04-08 12:47 am

which of the following equations describes a line perpendicular to the line y=7x+49?

[匿名]

回覆: 1

2017-04-05 4:10 pm

Calculate the hydronium ion concentration (M) showing all steps of a solution formed by 300ml of 3M HCl with 100ml of 2M KOH. Please help!?

[匿名]

回覆: 2

2017-04-04 12:50 am

Give the IUPAC name for each of the following: https://session.masteringchemistry.com/problemAsset/1791786/1/timberlake11_ch12_p002_b.jpg?

[匿名]

回覆: 5

2017-03-30 12:34 am

(x/x-1)-(2x/x^2-1)?

[匿名]

回覆: 1

2017-03-29 2:52 pm

Hard Calculus Question?

[匿名]

回覆: 2

2017-03-28 12:42 am

Confused?? :(?

[匿名]

回覆: 2

2017-03-27 12:31 pm

Calculate the specific hea of copper?

[匿名]

回覆: 21

2017-03-21 1:25 am

what is half of three fourths?

[匿名]

回覆: 1

2017-03-16 12:31 am

10 meq potasium to mg?

[匿名]

回覆: 1

2017-03-16 12:32 am

10 meq potasium to mg?

[匿名]

回覆: 4

2017-03-15 12:37 am

What s the probability of getting AN ace in 5 consecutive draws from a deck of 52 cards? Do we need to take into account of the arrangement?

[匿名]

回覆: 1

2017-03-14 1:17 pm

How much heat is necessary to completely vapourize 75.0 g of ice at 0°C?

[匿名]

回覆: 2

2017-03-10 11:05 pm

Geometry help please??

[匿名]

回覆: 2

2017-03-10 5:44 pm

Find the wavelength of the ultrasonic wave (343 m/s) emitted by a bat if it has a frequency latex 4.0* 10^4 Hz.?

[匿名]

回覆: 1

2017-03-09 11:48 pm

Chemistry homework Help!?

[匿名]

回覆: 1

2017-03-08 2:32 pm

50.0 mL HCl was combined with an excess amount of Al and 1.08 L hydrogen gas was produced at 25 °C and 0.827 atm. What was the concentration?

[匿名]

回覆: 1

2017-03-02 8:43 pm

The equilibrium pressure of NO2 in the equilibrium N2O4(g) <==> 2NO2(g) is 1.56 atm. Its pressure on the addition of a catalyst will be?

[匿名]

回覆: 1

2017-02-28 2:12 am

During a laboratory experiment at 1.0 atm and 25°C?