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3 years ago

From left to right in the periodic table does in get larger or smaller

Chemistry

1 answer:

Paul [167]3 years ago

6 0

Atomic size gradually decreases from left to right across a period of elements.

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HBr can be added to alkenes in either the absence or presence of peroxides (producing either the Markovnikov or the anti-Markovn

Dmitrij [34]

Answer:

1) 2-bromobutane

2) 1-bromobutane

Explanation:

In the HBr reaction, we will have a markovniknov reaction due to the carbocation formation. The Br- then would be added in the most substituted carbon of the double bond.

In the HBr/peroxide reaction we have the opposite case: an anti-markovnikov reaction. Therefore the Br- would be added in the least substitued carbon of the double bond.

3 0

3 years ago

What products are formed when aqueous solutions of KBr and Pb(NO3)2 are mixed? KNO3 and PbBr K(NO3)2 and PbBr KNO3 and PbBr2 KPb

Yuliya22 [10]

All you have to do is combine the two.

4 0

4 years ago

Read 2 more answers

Why do crisp packets become inflated at high altitudes? Again, explain in as great a detail as possible, using ideas about parti

Andrei [34K]

As you get higher the atmospheric pressure lowers. The pressure in the packet of crisps has the pressure at which it has been closed (pressure at the surface of the earth). This means that the air molecules in the packet press harder outside than the air molecules in the atmosphere press on the packet.

3 0

3 years ago

Which statement about balanced chemical equations is true?

Inessa05 [86]

O B. The total mass of the reactants equals the total mass of the

products.

4 0

3 years ago

Camphor is a ketone compound and is one of the active ingredients in vicks products. if camphor has m+ = 152 and contains 1 doub

nordsb [41]

Answer:

C₁₀H₁₆O

Explanation:

Molecular formula can be determined from parent peak by using rule of thirteen.

Rule of Thirteen:

First divide the parent peak value by 13 as,

= 152 ÷ 13

= 11.69

Now, multiply 13 by 11,

= 13 × 11 (here, 11 specifies number of carbon atoms)

= 143

Now subtract 143 from 152,

= 152 - 143

= 9

Add 9 into 11,

= 9 + 11

= 20 (hydrogen atoms)

So, the rough formula we have is,

C₁₁H₂₀

Now, add one Oxygen atom to above formula and subtract one Carbon and 4 Hydrogen atoms as these numbers are equal to atomic mass of Oxygen atom as,

C₁₁H₂₀ -------O--------> C₁₀H₁₆O

Calculate Hydrogen deficiency index as,

HDI = (2x + 2 - y) / 2

where,

x = C atoms

y = H atoms

HDI = [2(10) + 2 - 16] / 2

HDI = (20 + 2 - 16) / 2

HDI = (22-16) / 2

HDI = 6 / 2

HDI = 3

It means, Camphor contains 1 double bond and two rings. As, HDI of double bond is 1 and HDI of one ring is 1.

7 0

4 years ago