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4 years ago

What is the name of the compound

Chemistry

1 answer:

Snezhnost [94]4 years ago

7 0

Answer:

storkalesus

Explanation:

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1.a)concentrated sulphuric acid reacts with ethanol to produce ethene

Murljashka [212]

Answer: a) Temperature of $170^0C$

b) $C_2H_5OH\stackrel{conc H_2SO_4, 170^0C}\rightarrow C_2H_4+H_2O$

c) dehydrating agent

Explanation:

Ethanol is heated with an excess of concentrated sulfuric acid at a temperature of 170°C to produce ethene.

The balanced chemical reaction is:

$C_2H_5OH\stackrel{conc H_2SO_4, 170^0C}\rightarrow C_2H_4+H_2O$

Here concentrated sulfuric acid removes a water molecule from ethanol and thus acts as a dehydrating agent.

4 0

3 years ago

It takes 42.25 ml of 0.0500 M Na2S2O3 solution to completely react with the iodine present in a 150.0 ml iodine solution. How ma

svlad2 [7]

Answer:

There were 0.268 grams I2 present

Explanation:

Step 1: Data given

Volume of Na2SO3 = 42.25 mL = 0.04225 L

Molarity of Na2SO3 = 0.0500 M

Volume of iodine = 150.0 mL

Step 2: The balanced equation

I2 + 2 Na2SO3 → Na2S2O6 + 2 NaI

Step 3: Calculate moles of Na2SO3

Moles Na2SO3 = molarity * volume

Moles Na2SO3 = 0.0500 M * 0.04225 L

Moles Na2SO3 = 0.0021125 moles

Step 4: Calculate moles I2

For 1 mol I2 we need 2 moles Na2SO3

For 0.0021125 moles Na2SO3 we have 0.00105625

Step 5: Calculate mass of I2

Mass I2 = moles * molar mass

Mass I2 = 0.00105625 * 253.8 g/mol

Mass I2 = 0.268 grams

There were 0.268 grams I2 present

3 0

4 years ago

Read 2 more answers

The noble gases are grouped together in the periodic table. where are the noble gases in the table?

Rasek [7]

For the noble gasses, you get D, but metals are basically everywhere in the periodic table...

6 0

3 years ago

Read 2 more answers

Which of the changes are chemical changes?

Drupady [299]

Answer:

two of them are chemical changes

Explanation:

1.) the copper roof turns green over time: it forms a new substance which is the green deposit known as verdigris .

2.) baking soda is dissolved in vinegar and bubbles form: it forms a new substance which is carbon dioxide gas.

I hope it helps:)

5 0

3 years ago

Using the steam tables, determine the enthalpy change for 1lb of water:

Semenov [28]

Answer:

change in enthalpy for 1 lb water is - 970.10872 Btu

Explanation:

Given data:

weight of water 1 lb

pressure 1 atm

temperature 212 Fahrenheit

From steam table

initial enthalpy $h_1 = 1150.288 Btu/lb$

final enthalpy $h_2 = 180.18 Btu/lb$

change in enthalpy is given as

$\Delta h = m (h_2 -h_1)$

$\Delta h = 1\times ( 180.18020 - 1150.288)$

$\Delta h = - 970.10872 Btu$

change in enthalpy for 1 lb water is - 970.10872 Btu

4 0

4 years ago