wanszeto

[匿名]

回覆: 2

2020-10-19 1:42 pm

What is the molar solubility of tin(II) hydroxide if the Ksp is 3 x 10^-27 ?

用戶88982

回覆: 2

2020-10-13 3:53 pm

A frog in a hemisphere bowl as shown below just floats in fluid with density of 1350 kg/m3 if the bowls has a radius of. 2.00cm ?

smith

回覆: 2

2020-09-30 10:38 pm

chem help plz?

Light

回覆: 2

2020-09-30 6:25 pm

What is molarity and molality?

[匿名]

回覆: 1

2020-09-30 4:22 pm

What is the mass (g) of solute in 175 mL of a 1.287 x 10^-3 M solution of Na3PO4? ?

[匿名]

回覆: 1

2020-09-30 3:24 pm

What is the hybridization of each of the atoms indicated by an arrow? You should draw out these structures and label directly on them.?

[匿名]

回覆: 4

2020-09-24 3:47 pm

What is the fourth derivative of V (x) = x^3 - x^2 + x - 1?

Michelle

回覆: 3

2020-09-24 3:18 pm

How can you determine whether the sum of several numbers, such as 13 + 45 + 24 + 17, is even or odd without actually calculating the sum?

Jenny Thy

回覆: 5

2020-09-24 6:25 am

A chemical reaction that is first order in X is observed to have a rate constant of 2.1 × 10 –2s –1. ?

Joanne

回覆: 1

2020-09-21 4:38 pm

Help! I'm looking for the second derivative of a parametric equation?

Hannah

回覆: 6

2020-09-21 4:46 pm

Find 3 consecutive integers such that the sum of the three is equal to 2 times the sum of the first two integers. ?

[匿名]

回覆: 2

2020-09-21 4:29 pm

Empirical & Molecular Formula?

Veronica

回覆: 3

2020-09-14 4:55 pm

In physics is it cm or m?

用戶89046

回覆: 1

2020-09-14 4:56 pm

Find angles math help?

charles

回覆: 1

2020-09-14 3:32 pm

PLEASE HELP URGENT CHEMISTRY HOMEWORK IN DESCRIPTION NEED TO SHOW WORK?

Irene

回覆: 1

2020-09-09 2:11 pm

What is the final volume of the gas?

Irene

回覆: 1

2020-09-09 2:15 pm

Calculate Kp?

用戶89044

回覆: 1

2020-09-09 1:32 pm

what is the maximum mass of ammonia that can be produced from a mixture of 1.20x 10^3g N2 and 5.60x 10^2g H2?

[匿名]

回覆: 3

2020-09-06 11:25 pm

Please help with this Algebra 2 question?

[匿名]

回覆: 4

2020-09-06 11:27 pm

Help with this algebra 2 question?

Mayank

回覆: 1

2020-09-06 10:54 pm

Solve the question?

用戶89011

回覆: 2

2020-09-06 9:59 am

Physics Problem?

[匿名]

回覆: 2

2020-09-06 11:07 am

Milliliters to moles ?

Alan

回覆: 1

2020-08-31 6:42 pm

急~高手救我~因式分解下列各式： 一.a²(b-c)+b²(c-a)+c²(a-b) 二.（x-6)(x-3)(x+2)(x+4)-84x²?

[匿名]

回覆: 2

2020-08-30 12:05 am

可以解釋一下嗎？從第二步驟開始?

Wen

回覆: 2

2020-08-30 2:30 am

求解，高一數學！急！！?

Mcc

回覆: 4

2020-08-25 11:04 pm

Factor Theorem problem?

[匿名]

回覆: 2

2020-08-25 8:56 pm

What is [H3O +] in a solution of 0.25 M CH3CO2H and 0.030 M NaCH3CO2? ?

FRED

回覆: 2

2020-08-24 4:46 pm

Calculate the pH of 1.0M solution of methylamine (𝐶𝐻3𝑁𝐻2 , 𝐾𝑏 = 4.38 × 10−4)?

Cris

回覆: 1

2020-06-04 12:08 am

A 1.00 L flask is filled with 1.25 g of argon at 25 ∘C. Ethane vapor is added to the same flask until the total pressure is 1.050 atm .?

AMIRDHAVARSHINI

回覆: 1

2020-06-03 6:24 pm

Complete the following reactions ( Find A,B and C) i) CH3-CH2-OH + PBr3 ---------> A + aq. NaOH --------> B + Na ---------> C?

[匿名]

回覆: 1

2020-06-03 12:18 pm

What is the molarity of CO2 in a liter of ocean water, with density of 1027 kg/m^3, at 25 *C that contains approximately 280 ppm of CO2?

Zach

回覆: 1

2020-05-18 10:14 am

What is the approximate enthalpy change for the formation of 3.10 mol of water? 2 H2(g) + O2(g) 2 H2O(l) ΔH = +571.6 kJ?

[匿名]

回覆: 2

2020-05-18 10:25 am

whats the mole fraction of urea in a solution prepared by dissolving 16g urea in 39 g h2O?

chloe

回覆: 1

2020-05-17 7:54 pm

Second-order reaction. chem help?

yelyah

回覆: 1

2020-05-17 6:35 pm

Chemistry Help!!?

Mary Joy

回覆: 2

2020-05-06 1:35 pm

What is the mass in grams of solute in 26.0 ml of 0.150 M sucrose (342g/mole)?

sologuitar

回覆: 3

2020-05-06 2:00 pm

Proving Trig Identity?

[匿名]

回覆: 2

2020-05-06 11:46 am

Chemistry Homework Answers Check?

[匿名]

回覆: 1

2020-04-25 6:48 pm

given that sin(x+y)=sinxcosy+cosxsiny use complementary identity and show that cos(x+y)=cosxcosy-sinxsiny?

[匿名]

回覆: 1

2020-04-25 12:06 am

Need help with probability problems E and F?

[匿名]

回覆: 2

2020-04-24 10:28 pm

What is being oxidized? Reduced? What is the oxidizing agent? Reducing agent?

[匿名]

回覆: 2

2020-04-14 10:24 pm

Rate of reaction, constant question?

[匿名]

回覆: 3

2020-04-14 9:48 pm

Maths!!!!! second degree equations ?

[匿名]

回覆: 1

2020-04-14 10:09 pm

Write the systematic iupac name ?

[匿名]

回覆: 1

2020-04-08 10:55 pm

The number of grams of (NH4)2SO4 needed to make 440.mL of a 2.75M solution is nearest to a. 363  b. 313 c. 160. d. 138 e. 58.0?

[匿名]

回覆: 1

2020-04-08 10:11 pm

How many unpaired electrons are in a ground state Magnesium atom?

用戶89046

回覆: 2

2020-04-08 4:22 pm

Chemistry question?

[匿名]

回覆: 1

2020-04-06 1:08 pm

Please Help!?

[匿名]

回覆: 3

2020-04-06 1:32 pm

Verify the identity. Assume all quantities are defined. ?