Roger the Mole

[匿名]

回覆: 1

2021-04-20 10:03 am

The heating curve shown below represents the heating of substance ex add a constant state of heat transfer?

[匿名]

回覆: 5

2021-04-18 4:45 am

is it normal to spontainosly combust asking for a friend?

[匿名]

回覆: 2

2021-04-16 11:52 am

把鋅片放入硫酸銅水溶液析出黑色的東西是甚麼？

smile

回覆: 1

2021-04-14 9:13 pm

水溶液是化合物還是混合物?

[匿名]

回覆: 6

2021-04-09 5:50 am

is there a way to melt sand using a oven?

[匿名]

回覆: 8

2021-04-07 10:38 pm

The mass in B minor by Johann Sebastián Bach is the best musical composition of all time?

[匿名]

回覆: 7

2021-04-01 2:17 am

Why are so many famous classical composers from Eastern Europe?

[匿名]

回覆: 12

2021-03-30 6:40 am

What is your favourite piece of classical music?

[匿名]

回覆: 2

2021-03-29 2:12 pm

How much Heat is Released Question?

sky

回覆: 1

2021-03-16 11:44 am

 化學原料供應商 及 1-(2-hydroxyethyl)pyridin-1-ium-3-carboxylate->中文名?

[匿名]

回覆: 1

2021-03-12 3:14 pm

0.1M氫氧化鈉水溶液配製成0.025M 250mL的氫氧化鈉水溶液 如何配製?

[匿名]

回覆: 1

2021-03-09 1:10 am

臭氧的行成是放熱還是吸熱反應? 臭氧的分解是吸熱還是放熱?

[匿名]

回覆: 2

2021-02-10 11:34 am

0.125 of an unknown nonelectrolyte compound dissolved in 100 ml?

[匿名]

回覆: 3

2021-01-22 10:18 am

Which of the following solutions is the most concentrated? ?

[匿名]

回覆: 2

2021-01-10 4:25 pm

金屬銅與濃硝酸反應：Cu(s)+HNO3(濃）——》Cu(NO3)2(aq)+NO2(g)+H2O(l)(未平衡），取1莫耳的銅與足量濃硝酸完全反應，則可生成多少莫耳氣體？

Julia

回覆: 1

2021-01-07 9:30 am

3.11 怎化為3 I/9?

[匿名]

回覆: 1

2020-12-16 8:48 am

The place for the ammonium ion is 9.25. At equilibrium at pH 6.40 what is the concentration of NH4+ and NH3? ?

[匿名]

回覆: 3

2020-12-12 1:22 pm

What is the empirical formula of a compound with 1.20% H, 42.00% Cl, and 56.80% O?

[匿名]

回覆: 2

2020-11-24 11:41 am

How many oxygen atoms are there in 98.4g of oxygen gas?

[匿名]

回覆: 2

2020-11-20 10:06 am

How long would it take, in minutes, for the amount of potassium-44 to decrease from 32.0 mg to 4.00 mg?

[匿名]

回覆: 3

2020-11-17 11:44 am

How long until the radioactive isotope decays to 1.3×10−2 mg ? ?

[匿名]

回覆: 1

2020-11-04 5:41 am

how viscous is the fluid in our ears?

[匿名]

回覆: 1

2020-11-02 6:15 am

Chemistry Help Please?

[匿名]

回覆: 2

2020-09-26 9:52 am

what is the structural formula for  3-propoxyheptane?

[匿名]

回覆: 5

2020-09-10 10:49 pm

Empirical formula question?

[匿名]

回覆: 7

2020-09-08 2:47 am

What would BO5 be called? ?

[匿名]

回覆: 3

2020-09-05 4:37 am

How to name this organic molecule?

[匿名]

回覆: 2

2020-09-02 2:36 am

Predict the formula for the compounds formed from the combinations of ions of the following elements:?

[匿名]

回覆: 2

2020-08-19 4:29 pm

Chemistry Question Helllppppp?

[匿名]

回覆: 3

2020-08-17 2:41 pm

A 92.3 g sample of O2 gas at 0.0°C and 5.065 x 104 Pa is compressed and heated until the volume is 2.76 L and the temperature is 27°C?

[匿名]

回覆: 2

2020-07-23 1:35 pm

A sample of krypton gas at a pressure of 982 mm Hg and a temperature of 30 °C, occupies a volume of 7.68 liters.?

[匿名]

回覆: 1

2020-07-23 11:25 am

石蕊試紙接觸酸或鹼的物質會產生甚麼變化？

明

回覆: 1

2020-07-14 8:10 pm

水中加某種物質所結成的冰塊，在常温下可以持續很久而不會融化？

[匿名]

回覆: 3

2020-07-06 1:18 am

How many moles of chlorine gas can be produced if 4 moles of FeCl3 react with 4 moles of O2? ?

[匿名]

回覆: 5

2020-06-09 12:18 am

What is the IUPAC name of this carboxylic acid?

[匿名]

回覆: 3

2020-05-31 1:24 pm

Molarity question?

Smile

回覆: 1

2020-05-22 8:29 am

Chemistry problem: i don't understand how to do, thanks?

Smile

回覆: 1

2020-05-22 7:26 am

Chemistry problem: how to do, thanks?

[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?

[匿名]

回覆: 2

2020-05-13 11:35 pm

A, B, C, or D?

[匿名]

回覆: 2

2020-05-12 1:12 pm

Which of the following reactions would result in decreased entropy?

[匿名]

回覆: 2

2020-05-06 11:46 am

Chemistry Homework Answers Check?

[匿名]

回覆: 2

2020-04-29 1:08 pm

A sample of trifluoroacetic acid, C2HF3O2, contains 40.5 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.?

[匿名]

回覆: 2

2020-04-29 11:24 am

What is the net ionic equation for the reaction between aqueous sulfuric acid and aqueous sodium hydroxide?

[匿名]

回覆: 2

2020-04-29 11:19 am

How many moles of oxygen will occupy 728 al 760 mm Hg and 25C? please keep 3 significant figures ?

[匿名]

回覆: 2

2020-04-27 11:08 pm

Calculate the percentage of uranium in the sample. Thank you!!?

[匿名]

回覆: 2

2020-04-24 11:32 am

Chemistry?

[匿名]

回覆: 3

2020-04-20 11:17 am

Chemistry Problem Help ASAP!?

[匿名]

回覆: 2

2020-04-20 10:35 am

Calculate number of atoms of aluminum of aluminum oxide with a mass of 2.3 Grams?

[匿名]

回覆: 2

2020-04-15 11:55 pm

When the nuclide iodine-131 decays to xenon-131, what kind of decay does iodine-131 undergo?