The first table was arranged by atomic mass, but later Mosely improved it by arranging by _______________.

Chemistry

2 answers:

SIZIF [17.4K]3 years ago

5 0

Order of increasing atomic mass!

hope this helps :)

Kay [80]3 years ago

4 0

The first table, created by Mendeleev, was arranged by increasing atomic mass. However, it was later changed by Mosley, who arranged it the way it is today. He organized it by atomic number.

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You observe mothballs disappearing in cabinets. What do you think is the reason for this? Do all substances behave like mothball

cricket20 [7]

Answer: Mothballs have weak intermolecular forces.

No all substances do not behave like mothballs at normal conditions. Example: benzene , chloroform

Explanation:

Sublimation is a process of converting a substance from solid state to gaseous state without the formation of liquid at constant temperature.

A substance which undergoes sublimation is called as sublimating substance.

As mothballs is made of napthalene which has weak inter molecular forces of attraction between its molecules, it directly sublimes into gaseous state without leaving any residue and is called as a sublimating substance.

Not all substances behave like mothballs at normal conditions. Example: benzene , chloroform

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3 years ago

In a DNA sample, 15% of the bases are thymine (T). What percentage of the bases in this sample are cytosine (C)?

allochka39001 [22]

Answer:

C) 35%

Explanation:

Thymine pairs with adenine. If thymine is 15% then so would adenine be 15%. That leaves the reaminder to be 70%. Cytosine pairs with guanine, thereby, they would each be 35%.

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3 years ago

In Section 5.6, we learned that triple bonds are stronger and shorter than single bonds. For example, a C−CC−C single bond has a

olya-2409 [2.1K]

Answer:the strength of a bond depends on the amount of overlap between the atoms.

Explanation:the greater the overlap the greater the strength of the bond.

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3 years ago

Give the correct balanced equation for the single replacement reaction of magnesium with aluminum oxide. A) Mg + AlO → MgO + Al

solniwko [45]

Answer is "C".

Explanation

Single replacement reaction is a type of reaction which one reactant reacts with another and makes a product by replacing one element by another.

Mg (Magnesium) reacts with Al₂O₃ (Aluminium oxide) and produces MgO (Magnesium oxide) and Al (Aluminium) as products. Here Al is replaced by Mg. Reaction is
Mg + Al₂O₃ → MgO + Al

To balance the reaction equation, both left and right hand sides should have same number of atoms in each element.
Here,
Left Hand Side has Right Hand Side has
Mg = 1 atom Mg = 1 atom
Al = 2 atom Al = 1 atom
O = 3 atom O = 1 atom

First step : balance the O atoms in both sides. To do that "3" should be added before MgO.

Second step : After balancing O atoms, there will be 3 Mg atoms in right hand side. Hence to balance Mg atoms again "3" should be added before Mg in left hand side

Third step : as the final step balance the Al atoms by adding "2" before Al in the right hand side.

Then final balanced equation should be
3Mg + Al₂O₃ → 3MgO + 2Al

4 0

2 years ago

Read 2 more answers

Chemical reactions will occur if the products are less stable than the reactants. true or false

rusak2 [61]

For the answer to the question above, Chemical reactions will occur if the products are less stable than the reactants

So, the answer to your question is True.
I hope my answer helped you. Feel free to ask more questions. Have a nice day!

8 0

2 years ago