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2 years ago

Name the 1 isomer of c7h16 that contains an ethyl branch on the parent chain.

1 answer:

5 0

An isomer is a compound which has the same atoms as another, but the spatial arrangement of the atoms is different. If we wish to have an ethyl, or two carbon, side chain, then the main chain may be five carbon atoms long. This compound then becomes:

3-ethylpentane; where the parent chain is pentane and the ethyl group is attached to the third carbon from the start of the parent chain.

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Mass of a mole is known as

gayaneshka [121]

Answer:

Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms.

Explanation:

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7 0

2 years ago

A sample of octane burns releasing 2290 J of heat to the surroundings, and the gases produced expands against a piston to do 560

dexar [7]

Answer: The internal energy change for the reaction is -2850 J

Explanation:

Sign convention of heat:

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

Sign convention of work:

Work done for expansion process is taken as negative and work done for compression is taken as positive.

According to the First law of thermodynamics,

$\Delta U=q+w$

where,

$\Delta U$ = internal energy

q = heat absorbed or released = -2290 J

w = work done = -560 J

Putting values in above equation, we get:

$\Delta U=(-2290)+(-560)\\\\\Delta U=-2850J$

Hence, the internal energy change for the reaction is -2850 J

4 0

3 years ago

5. This particle has a positive charge O Protons Neutron Electron

Fynjy0 [20]

Protons have a positive charge
Neutrons are neutral
Electrons have negative charge

8 0

2 years ago

Read 2 more answers

In which type of wave do the particles in a medium move perpendicular to the direction that the wave moves?

ladessa [460]

Have you ever seen a buoy on a sea before? It goes up and down, perpendicular to the direction the wave moves. What's the motion of the sea looks like? Transverse wave, not ocean waves because we're talking about particles.

4 0

3 years ago

A sample of ammonium chloride (NH4Cl) has 9.8 moles. How many atoms of hydrogen are in the sample?

blondinia [14]

2.360 × 10^25

Explanation:

The only issue that may arise from asking a question like this is not understanding mole ratios:

Imagine 1 mol of CO2:

You need 1 mol of the end result. In the end result, you have:

1 Carbon

2 Oxygens

When you're trying to get 1 mol of the final compound, you need to have:

1 mol Carbon

2 mol Oxygen

If this doesn't make sense, Khan Academy has insightful videos showing how this works.

So, for NH4Cl, ignore everything but the H. We don't care about them.

You need 4 hydrogens to get 1 NH4Cl, so multiply whatever mole value you're given by 4. That's how many moles of hydrogen there are.

9.8 mol × 4 = 39.2mol H

So the next question is, what is a mole? The answer to this question is the same as asking what is a dozen? Well, it's just a number of things. Instead of 12, like a dozen, it's 6.02×10²³. This is called Avogadro's Number.

So say you have two dozen. You'll do 2 × 12, right?

Say you have 39.2moles. Apply the same idea, except with Avogadro's Number instead of 12:

39.2 × 6.02×10²³ = 2.360 × 10^25

So what is this number? It's how many things are in 39.2moles. We were calculating individual hydrogens, which are atoms, so this number represents how many atoms there are in 39.2moles.

6 0

3 years ago