09/14/23

how to cancel a session
Is there a way to cancel a session or do we need to send a message to the tutor
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11/02/21

What will be the pressure of a gas compressed from an initial pressure of 11.5 atm in 53.2 L at 25°C to a volume of 23.1 L at 75°C.
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10/26/21

Find the electronegativity difference
What is the electronegativity difference of CH3OH?Carbon=2.5 Hydrogen=2.1 Oxygen=3.5a. 1.1b. 5c. 0.9d. none of the above
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10/25/21

Titration Question

A 30 mL sample of 0.45 mol/L bleach solution, NaOCl, is reacted with an excess of KI solution according to the following reaction equation: 2H+ + OCl- + 2I- → Cl- + H2O + I2 The I2 produced is... more
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10/25/21

why do acidify the aqueous layer

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10/19/21

Organic Chemistry Relative Rate(s)
Predict the relative rates of reaction for 1-bromobutane, 2-bromobutane and 2-bromo-2-methylpropane with sodium iodide.1: Fastest2:3: LowestThe possible answers are 1-bromobutane, 2-bromobutane,... more
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02/15/21

Draw the Structure of the following compound s-cis and s-trans conformation

s-cis and s-trans conformation of (2E, 4Z)2-methyl-2,4-octadiene
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02/11/21

please help solve this

5.00 g of salicylic acid and 10.0 ml of acetic anhydride were used to prepare aspirin using sulfuric acid as catalyst. The student isolated 4.13g of aspirin. Calculate the % yield of the reaction.... more
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11/13/20

Would you expect fluorine or iodine to have a greater electronegativity? Why? (hint: It has to do with the nucleus.)
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11/12/20

i need help on chemistry it multiple choice question
The figure shows different possible transitions of electrons as they move from higher energy states to lower energy states. Which transition will produce the spectrum line with the lowest... more
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11/12/20

Which Bohr diagram shown above represents the purple band seen in the hydrogen emission spectra (below)? The red band? The blue band? The blue-green band? Explain how you know.
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11/12/20

Organic Chemistry College Homework Help Please

DNA template strand: 3’ GGC ACT ATT GCT 5’a)   Write corresponding mRNA segment.b)   What are the anticodons of the tRNA?c)   Write the 3 letter abb. for the sequence.thank you
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11/11/20

If 7.25 g of Mg undergoes the following reaction, what is the % yield if 6.76 g of magnesium nitride is produced? 3 Mg(s)+N 2 (g) Mg 3 N 2 (s)
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11/08/20

Significance of conditions for hydration of alkene
Here is what I have concluded (correct me if I am wrong) In hydration of alkenes we react alkenes(non polar) with sulphuric acid first(as direct reaction of water is not possible)~the cold and... more
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10/29/20

chemistry class

A solution of CaCl2 in water forms a mixture that is 30.0% calcium chloride by mass. If the total mass of the mixture is 455.1 g, what masses of CaCl2 and water were used?
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10/29/20

A wafer with dimensions 12.00 cm * 12.00 cm * 0.0200 cm contains 0.239 moles of siliconHow many grams of Si does this represent?
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10/29/20

Help pleasee confused on these questions.
3. 2Al+ 3Cl 2 → 2AlCl 3How many grams of AlCl 3 could be produced from 34.0 g Al and 39.0 gCl 2 ?4. N 2 + 3H 2 → 2NH 3a. How many grams of NH 3 will be produced if you have 55.2 g N 2 and89.7 g of... more
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10/26/20

Chemistry: Back Titration
50.9 mL of 1.16 M nitric acid is added to 29.9 mL of sodium hydroxide, and the resulting solution is found to be acidic.17.6 mL of 1.10 M calcium hydroxide is required to reach neutrality.What is... more
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10/18/20

reduction of esters and carboxylic acids
reduction of esters and carboxylic acidsConditions of reaction?products formed?special notes ?mechanisms/Example of reaction?
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