andrew

[匿名]

回覆: 1

2016-02-24 6:04 am

A 12.5 mL portion of a solution is diluted to 500mL and its molarity is determined to be .125?

[匿名]

回覆: 1

2016-02-24 5:53 am

You have a solution for which the hydronium ion concentration is 4.5 x 10–4 M.?

Eman

回覆: 1

2016-02-24 5:34 am

An 15.0 −kg box is released on a 34.0 ∘ incline and accelerates down the incline at 0.240 m/s2?

[匿名]

回覆: 3

2016-02-24 5:18 am

What is the derivative of the function f(x) = (sin x) / (cos x + 3)?

[匿名]

回覆: 1

2016-02-23 3:53 pm

a.) what volume of water vapor measured at 250 degrees celsius and 1.00atm is produced when 3.00L of propane at STP is burned?

[匿名]

回覆: 1

2016-02-23 4:32 pm

can someone give me 6 examples of physical change and chemical change?

[匿名]

回覆: 1

2016-02-23 4:33 pm

60.00g what is the significant digits?

[匿名]

回覆: 2

2016-02-23 4:07 pm

If 465mL of oxygen at STP is used in the reaction, what volume of CO2, measured at 37.3 degrees Celsius and 0.973atm, is produced?

[匿名]

回覆: 1

2016-02-23 2:06 am

請問呢2題點做? https://www.dropbox.com/s/xc5p4og72m9lydh/1112.jpg?dl=0?

[匿名]

回覆: 1

2016-02-22 7:27 pm

A 35.8g sample of a substance is initially at 27.8 degree C. After absorbing 1543 J of heat, the temperature of the substance is 106.0 C.?

[匿名]

回覆: 1

2016-02-22 7:06 pm

Suppose that we were measuring the average rate of reaction for 1A+2B=1C and that we obtained a value of -0.50 M ?

[匿名]

回覆: 1

2016-02-22 6:48 pm

For the following reaction, Kc = 255 at 1000 K. CO (g) + Cl2 (g) ⇌ COCl2 (g) Equilibrium concentration problem?

[匿名]

回覆: 2

2016-02-22 6:22 pm

what mass is required to burn 688 g of octane, C8H18, completely?

[匿名]

回覆: 1

2016-02-22 6:31 pm

Chemistry help.. how to?

[匿名]

回覆: 2

2016-02-22 6:24 pm

1.237 grams of acid were dissolved in water and reacted exactly with 0.0215 mol of sodium hydroxide. What is the equivalent wt. of the acid?

[匿名]

回覆: 1

2016-02-22 6:14 pm

What mass of aluminum is produced by the decomposition of 7.17 kg of Al2O3? Answer in units of kg.?

[匿名]

回覆: 1

2016-02-22 5:54 pm

Chemistry Help!?

[匿名]

回覆: 1

2016-02-22 5:57 pm

Chemistry Reaction Orders?

[匿名]

回覆: 2

2016-02-22 5:59 pm

MATH HELP PLEASE?!!? The function f(x) varies directly with x and f(x)=32 when x=-8 What is f(x) when x=4?

[匿名]

回覆: 1

2016-02-22 5:45 pm

H2(g)+I2(g)⇌2HI(g) Initially, only H2 and I2 were present at concentrations of [H2]=3.60M and [I2]=2.65M...?

[匿名]

回覆: 3

2016-02-22 5:43 pm

MATH HELP FAST Which is the direct linear variation equation for the relationship. The variable y varies directly with x and y=12 when x=3.?

[匿名]

回覆: 1

2016-02-22 5:13 pm

Calculate the theoretical mass of 1-bromo-3-chloro-5-iodobenzene starting from 5 g of aniline.?

[匿名]

回覆: 1

2016-02-22 5:16 pm

CHEMISTRY QUESTION?

[匿名]

回覆: 1

2016-02-22 5:04 pm

43.84 ml of 0.175 molar sodium hydroxide were used to neutralize 0.634 grams of an unknown acid. What is the equivalent wt. of the acid?

[匿名]

回覆: 2

2016-02-22 4:36 pm

what is the difference between intermoleculat forces and intramolecular forces?

[匿名]

回覆: 1

2016-02-22 4:20 pm

What happens when Ferrous Oxalate reacts with Acidified Potassium Permanganate ? Does Permanganate ion oxidize Fe^2+ or (C2O4)^2- or both ?

[匿名]

回覆: 3

2016-02-22 4:21 pm

What percent discount do you get with this coupon? 75 Cents off; Regular Price $3.00; with coupon $2.25?

[匿名]

回覆: 2

2016-02-22 3:57 pm

What is the probability that each person wins one match? (Hint: There are two different ways for this to happen.)?

[匿名]

回覆: 1

2016-02-22 3:03 pm

為於23.5°N的台灣 是白天較長還是夜晚？

[匿名]

回覆: 1

2016-02-22 3:31 pm

高二物理 斜面運動?

[匿名]

回覆: 1

2016-02-22 9:01 am

Calculate the volume of 0.0500 M EDTA needed to titrate 29.13 mL of 0.0598 M Mg(NO3)2?

[匿名]

回覆: 2

2016-02-22 6:10 am

Stoichiometry problem,chemistry!!! Please,at least try to solve it)))?

[匿名]

回覆: 2

2016-02-22 8:22 am

is life an experiment?

[匿名]

回覆: 1

2016-02-22 8:16 am

Can Hydrogen chloride (gas) turn litmus red or not?

[匿名]

回覆: 1

2016-02-22 7:32 am

a student transfers 25ml of a 5.0x10-3M NaOH solution into a 500 ml volumetric flask and fills with deionized water What is the molarity?

[匿名]

回覆: 1

2016-02-22 7:35 am

you prepared 200ml of an HCL solution and are standardizing with 25ml of a .1250 M Na2CO3. you use all 25ml. what is the HCL concentration?

[匿名]

回覆: 2

2016-02-22 7:36 am

Chemistry help needed.. Would be appreciated?

anyway

回覆: 1

2016-02-22 6:32 am

請問：設一個三角形的三邊長成等差數列，且三邊長都是小於７０的整數，試問滿足此條件的三角形共有幾個？(包含正三角形)。謝謝~~~?

[匿名]

回覆: 4

2016-02-21 2:39 pm

Solve for θ: 2 cos 3θ = -1, interval 0 to 2π Please help :)?

makemehot69

回覆: 2

2016-02-21 2:31 pm

what's 1.4+2/5e=3/15e-0.8?

makemehot69

回覆: 4

2016-02-21 2:28 pm

what is the solution 1/5x+5=19-1/2x?

[匿名]

回覆: 1

2016-02-21 1:47 pm

某次考試的題目都是選擇題，且一共有20題，已知每答對1題得5分，答錯1題倒扣一分，不作答者不給分亦不扣分。若君芸有3題未答，結果得67分，設她答對x題，則依題意可列一元一次方程式為?

[匿名]

回覆: 1

2016-02-21 1:35 pm

Please help?

[匿名]

回覆: 4

2016-02-21 1:11 pm

Solve: a) 2x2 – 7x + 2 = 0 by completing the square. b) 2x2 + 9x + 4 = 0 by factoring?

[匿名]

回覆: 3

2016-02-21 1:04 pm

How to balance a redox reaction equation if there is already a coffient in the equation?

[匿名]

回覆: 1

2016-02-21 1:04 pm

Iodine test is performed to detect presence of the starch because______________ Plz tell the answer. Needed for ssc?

[匿名]

回覆: 8

2016-02-21 12:56 pm

when X is added to a number which is thrice of 2, the result is 12. Find the value of X?

[匿名]

回覆: 4

2016-02-21 12:42 pm

Is this a regular polygon?

[匿名]

回覆: 3

2016-02-21 11:36 am

Integrate sin^2 x cos^5 x dx. I have the answer but I have no idea how to get to it.?

[匿名]

回覆: 2

2016-02-21 11:26 am

Physics Question? Kinetic Energy?