戇戇居士

[匿名]

回覆: 1

2017-10-09 8:39 pm

Molar volume experiment with Mg ad HCl?

[匿名]

回覆: 1

2017-10-09 2:21 pm

Help with this chemistry reaction shift question?

[匿名]

回覆: 1

2017-10-09 2:32 pm

In reaction A(aq)+B(aq)-->C(aq), where will the reaction shift if water is added and the concentrations are decreased? Will there be a shift?

[匿名]

回覆: 4

2017-10-08 11:36 pm

How do I solve this math problem?

[匿名]

回覆: 2

2017-10-06 10:35 pm

Help with chem homework!!!?

[匿名]

回覆: 4

2017-10-06 4:40 pm

Hello again! Can you people please help me in this math question?

[匿名]

回覆: 1

2017-10-04 9:50 pm

What is the coefficient in 4 Al2O3?

[匿名]

回覆: 2

2017-10-03 11:19 pm

What is the IUPAC name for Acetaminophen?

[匿名]

回覆: 3

2017-10-03 1:46 am

Simplify -3p 3 + 5p + (-2p 2) + (-4) - 12p + 5 - (-8p 3). Select the answer in descending powers of p.?

[匿名]

回覆: 1

2017-10-02 11:34 pm

The reaction for the formation of hydrogen iodide does not go to completion but reaches equilibrium: H2 + I2 = 2HI?

[匿名]

回覆: 5

2017-10-02 10:31 pm

Can -4 over -5 be written as 4 over 5 (for a y=mx +c gradient question?

[匿名]

回覆: 3

2017-10-02 7:50 pm

Ammonia fountain?

[匿名]

回覆: 2

2017-10-02 11:07 am

chem problem?

[匿名]

回覆: 2

2017-10-01 2:17 pm

Projectile Motion - What's the Range(R)?

[匿名]

回覆: 3

2017-09-30 11:33 am

19 mLs of neutralizer to neutralize 100 mLs of acid lake water, if we needed to neutralize 50 liters of drinking water, how many grams ?

[匿名]

回覆: 3

2017-09-29 9:25 pm

What is a dipole??

[匿名]

回覆: 1

2017-09-27 10:15 pm

What is the balanced net ionic equation between HCl and LiOH?

[匿名]

回覆: 2

2017-09-27 2:45 pm

1) Find the slope of the tangent line to the curve 6sin(x)+6cos(y)−4sin(x)cos(y)+x=3π at the point (3π,3π/2).?

[匿名]

回覆: 4

2017-09-27 11:44 am

What is the inverse of (2x^9)+3?

[匿名]

回覆: 2

2017-09-27 2:58 am

Chemistry?

[匿名]

回覆: 1

2017-09-27 1:23 am

kick a ball of the roof of your house.It rolls off at a velocity of 12m/s.The roof is 21m high.How long does it take the ball to hit ground?

[匿名]

回覆: 3

2017-09-26 10:55 pm

If a set of data has 81 values with a variance of 26.0, then the standard deviation is _________. a.) 2.9 b.) 0.6 c.)0.3 d.) 5.1?

[匿名]

回覆: 3

2017-09-26 5:13 pm

How many g of ethanol should made from 60 g of glucose?

[匿名]

回覆: 5

2017-09-26 1:34 pm

How do I solve them? Please someone teach me! 6x^8+9x^7+33x^5 3√13x+16√13x (7x^2 y^6 z^9)(5x^10y^7)?

[匿名]

回覆: 2

2017-09-25 9:34 pm

How many formula units of baking soda (sodium bicarbonate) are in 2.30 tsp? (1 tsp ≈ 7.50 g NaHCO3)?

[匿名]

回覆: 1

2017-09-25 2:21 pm

Help with combustion analysis?

[匿名]

回覆: 1

2017-09-25 12:54 am

chemistry question?

[匿名]

回覆: 3

2017-09-24 10:18 pm

Is p-cyclohexylnitrobenzene the same as p-nitrocyclohexylbenzene? does it matter how its written? Chemistry help?

[匿名]

回覆: 1

2017-09-24 7:58 pm

You mix 125 mL of 0.180 M with 50.0 mL of 0.450 M in a coffee-cup calorimeter, and the temperature of both solutions rises from 21.80 °C b?

[匿名]

回覆: 2

2017-09-20 1:45 pm

Maths word problems?

[匿名]

回覆: 1

2017-09-19 5:40 pm

what is the final ph of solution by mixing 100ml of 0.05m acetate acid and 100ml of 0.1m sodium acetate ?

[匿名]

回覆: 2

2017-09-15 11:20 pm

A compound is found to contain 15.94 percent boron and 84.06 percent fluorine by mass.?

[匿名]

回覆: 2

2017-09-13 10:20 am

How many O2 molecules are needed to react with 7.06 g of S? Express your answer numerically in units of molecules.?

[匿名]

回覆: 3

2017-09-13 12:13 am

70 kg man on earth. If earth gravity is doubled what is his weight?

[匿名]

回覆: 1

2017-09-12 5:15 pm

Ionic, Covalent network, Covalent discrete molecular, and metallic - Place ABCD into the approproate category?

[匿名]

回覆: 3

2017-09-12 3:08 pm

what is a mixture of water containing undissolved particles that are so small that they will not settle out of solution?

[匿名]

回覆: 5

2017-09-11 11:32 am

is 1/x-y the same thing as 1/x - 1/y?

[匿名]

回覆: 2

2017-09-04 6:35 pm

Chemical Equlibrium?

[匿名]

回覆: 1

2017-09-04 11:09 am

Which one of the following pairs of compounds could NOT be used to form a pH buffer solution in water?

[匿名]

回覆: 3

2017-09-02 11:24 pm

Please help with the following differentiation. If y=sec^2(x) show that dy/dx =2y (sqrt (y-1))?

[匿名]

回覆: 3

2017-09-01 11:06 pm

Help with this trig question?

[匿名]

回覆: 6

2017-08-30 5:32 pm

remainder when 2 to the power of 220 is divided by 7. Please show simple step by step working that a twelve year old would understand,thanks?

[匿名]

回覆: 2

2017-08-30 11:04 am

Algebra help?

[匿名]

回覆: 1

2017-08-28 4:51 pm

Help with science homework please!!?

[匿名]

回覆: 2

2017-08-28 12:52 am

Which of the following is TRUE of hydrophobic molecules?

[匿名]

回覆: 4

2017-08-27 11:11 pm

Solve 4x (2x+5) ^3 (2x-1) ^1/3=6x (2x+5)^3 (2x-1) ^2/3?

[匿名]

回覆: 2

2017-08-26 10:03 pm

What's the proper technique of converting 11 + 6sqrt(2) to the form [a+sqrt(b)]^2 ?

[匿名]

回覆: 5

2017-08-25 8:01 pm

Why does diatomic molecules (such as H2 or O2) have a heat of formation of zero?

[匿名]

回覆: 2

2017-08-23 2:56 pm

A solution has [OH−][OH−]= 1.5×10−2 M . Use the ion product constant of water Kw=[H3O+][OH−] to find the [H3O+] of the solution.?

[匿名]

回覆: 1

2017-08-22 11:23 pm

could you help me with my Chemistry?