Uncle Michael

[匿名]

回覆: 1

2021-04-19 8:17 pm

How much heat is emitted when 4.54 g of water condenses at 25 ∘C? The heat of vaporization of water at 25 ∘C is 44.0 kJ/mol.?

[匿名]

回覆: 1

2021-04-19 5:22 pm

Need help with fissions?

[匿名]

回覆: 1

2021-04-19 7:01 pm

How much heat is required to vaporize 50.6 g of acetone at its boiling point? ?

[匿名]

回覆: 1

2021-04-19 2:59 pm

2SO3(g) ↔ 2SO2(g) + O2(g) 1.) What happens when sulfur dioxide is removed from the system.2.)Sulfur trioxide is added to the system.?

[匿名]

回覆: 1

2021-04-18 5:15 pm

Chemistry Question?

[匿名]

回覆: 1

2021-04-18 5:16 pm

Chemistry Question?

Sad trump

回覆: 2

2021-04-18 10:30 am

What’s cracking ?

[匿名]

回覆: 1

2021-04-15 12:40 am

THERMOCHEM HELP How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

[匿名]

回覆: 3

2021-04-10 4:51 pm

Find the vertical component of v with a magnitude of 89.7 feet and a direction angle of 12.8°.?

[匿名]

回覆: 1

2021-04-06 8:50 pm

Could someone help me with this ? ?

[匿名]

回覆: 1

2021-04-05 5:42 pm

Calculate the enthalpy change that takes place when 1 mole of hydrazine burns in a lunar lander?

[匿名]

回覆: 2

2021-04-05 11:53 am

Evaluate the integral. ∫ 1 to 0      (u + 7)(u − 8) du?

[匿名]

回覆: 1

2021-04-02 2:05 pm

Since I need to calculate a percent error later, would the answer for both questions be in kJ or kJ/mol and how do we find the answers?

[匿名]

回覆: 1

2021-04-02 1:06 pm

What is the specific heat ( 𝑐 ) of the substance?

[匿名]

回覆: 1

2021-04-02 1:04 pm

If you combine 400.0 mL of water at 25.00 ∘C and 110.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture?

[匿名]

回覆: 1

2021-04-02 10:08 am

exponential word problem help? ?

[匿名]

回覆: 2

2021-03-31 7:24 am

Calculate the pH of a 0.370 M Lithium Fluoride (LiF) solution?

[匿名]

回覆: 1

2021-03-29 4:32 pm

If a compound has a hydroxyl group (OH group) and a double bond how do you name it?

[匿名]

回覆: 1

2021-03-29 3:58 pm

Vector f is <8,0> and vector h is <-6,2>, find f + 2h.?

[匿名]

回覆: 1

2021-03-29 3:57 pm

Find the component form of the vector AB with given initial and terminal points: A(-3,1) and B(4,5).?

[匿名]

回覆: 1

2021-03-29 4:13 pm

How to name alkenes?

[匿名]

回覆: 2

2021-03-29 2:12 pm

How much Heat is Released Question?

[匿名]

回覆: 1

2021-03-29 9:53 am

What is the solubility of M(OH)2 in a 0.202 M solution of M(NO3)2?

[匿名]

回覆: 1

2021-03-29 10:30 am

The value of Ksp for silver chromate, Ag2CrO4, is 9.0×10−12. Calculate the solubility of Ag2CrO4 in grams per liter.?

[匿名]

回覆: 1

2021-03-29 9:54 am

Explanation on Chemistry?

[匿名]

回覆: 1

2021-03-28 4:49 pm

A radioactive isotope has a half life of 75.3 minutes. How long will it take for the radiation from a 325 pCi sample to decrease to 162 pCi?

[匿名]

回覆: 1

2021-03-25 6:37 am

I need help on this calc problem?

[匿名]

回覆: 3

2021-03-24 12:17 pm

A 47.70 g sample of a substance is initially at 20.7 °C. After absorbing 1271 J of heat, the temperature of the substance is 119.1 °C?

[匿名]

回覆: 1

2021-03-24 10:41 am

Consider the reaction. 2Fe2O3⟶4Fe+3O2Δ𝐻∘rxn=+824.2 kJ  The formation of 26.0 g of O2 results in?

[匿名]

回覆: 1

2021-03-24 8:42 am

The decay of Iridium-192 which is a first-order reaction with a half-life of 74 days?

[匿名]

回覆: 2

2021-03-22 11:19 pm

If you combine 410.0 mL of water at 25.00 ∘C and 120.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture? ?

[匿名]

回覆: 4

2021-03-22 9:48 pm

which one is correct?

[匿名]

回覆: 1

2021-03-22 8:37 pm

Calculate the concentration of I− in a solution obtained by shaking 0.10 M KI with an excess of AgCl(s)?

[匿名]

回覆: 1

2021-03-22 2:05 pm

Calculate the speed of yellow light in ethanol (n=1.37)?

[匿名]

回覆: 2

2021-03-21 11:16 pm

What is the percentage of Silver in Ag2SO4? With steps please.?

[匿名]

回覆: 1

2021-03-17 10:28 pm

Hydrogen peroxide decays into water and oxygen in a first-order process at 20oC:?

用戶66690

回覆: 1

2021-03-17 3:09 pm

Name a common greenhouse gas containing only hydrogen and oxygen?

[匿名]

回覆: 1

2021-03-17 10:25 am

Aqueous Ionic Equilibrium?

[匿名]

回覆: 1

2021-03-16 11:17 pm

Aaron invested a total of $8,000 in two accounts. the first paid 7% interest annually the second account lost 1% annually at the end of the ?

[匿名]

回覆: 1

2021-03-16 4:27 pm

Draw the electron-dot structure and give the geometry for the following molecules or ions:  COF2?

[匿名]

回覆: 1

2021-03-16 6:00 am

A certain reaction has an activation energy of 68.0 kJ/mol and a frequency factor of A1 = 4.40×10^12 M^−1s^−1. ?

[匿名]

回覆: 2

2021-03-15 2:38 pm

Given the right triangle, write the Trig ratios.?

[匿名]

回覆: 1

2021-03-12 11:21 am

Determine the Ka for the acid HA given that the equilibrium concentrations are [HA]=2.31M, [A−]=0.27M, and [H3O+]=0.27M.?

[匿名]

回覆: 1

2021-03-11 12:09 am

What was the mass of FeSO4⋅7H2O in the 2.955 g sample?

[匿名]

回覆: 2

2021-03-10 11:40 pm

Equilibrium question Ethyl ethonate  with water?

[匿名]

回覆: 1

2021-03-10 2:15 pm

anyone is good with Chemistry?

[匿名]

回覆: 1

2021-03-10 2:16 pm

i my friend say this chem answer is 929 mmHg?

[匿名]

回覆: 1

2021-03-10 2:17 pm

WHAT MY CHEM fIRENDS THNK i say its 2 and 3?

[匿名]

回覆: 2

2021-03-10 1:33 pm

One mole of oxygen at 273 K and atmospheric pressure is adiabatically compressed to 5 atm. Calculate the final temperature. Also ?

[匿名]

回覆: 1

2021-03-10 11:16 am

A certain first-order reaction (A→products) has a rate constant of 6.30×10^−3 s^−1 at 45 ∘C. ?