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OLEGan [10]
3 years ago
7

"1. Atoms of different elements differ in which of the following ways? (1 point)

Chemistry
1 answer:
Gelneren [198K]3 years ago
3 0
1) A. the have different protons.

The number of protons is the atomic number and this is how the products are ordered in the periodic table. Every element has different atomic number.

2) A. 8 p, 8 e and 8 n

The atomic number of O is 8, which means it has 8 protons. The number of protons must equal the number of electrons.

3) C. atoms bond with one another in a molecule.

That is what a molecule is: a group ot atoms bonded.

4) D. the bond results from the attractive forces of two opposite charges.

Ionic bonds are formed between ions, a positive ion (cation) and a negative ion (anion).

5) A. the physical and chemical properties of HCl are different from those of H2 and Cl2

You can check physical properties (density for example) and chemical properties (how they react with other elements) in some tables o textbooks.
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Ethanol (C2H5OH) and water (H2O) are both liquids at or near room temperature. When a sample of ethanol is poured into a beaker
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Answer:

a. Are miscible because each can hydrogen bond with the other.

Explanation:

Both ethanol and water are miscible. The reason why they can both mix freely is due to the hydrogen bonds that will form between their molecular structure.

Hydrogen bonds are special dipole-dipole attraction between polar molecules in which hydrogen atoms are directly joined to an electronegative atom.

Ethanol has an hydroxyl group which will bond to form an intermolecular bond with the oxygen and hydrogen on the water molecule. This attraction makes them miscible.

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3 years ago
A weighed piece of magnesium ribbon is added to a dried crucible, which is reweighed and heated in air to form the compound MgO.
olga nikolaevna [1]

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One of the errors for low percentage of magnesium could be because not all the magnesium may have reacted.

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During the heating process, if the magnesium have not reacted completely, it can lead to low percentage of magnesium in the oxide formed. The product may still look a bit greyish rather than whitish after the heating process.

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Equal amounts of N2 and O2 are added, under certain conditions, to a closed container. Which changes occur in the reverse reacti
geniusboy [140]
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(that reaction requires special contitions because at normal pressures and temperatures N2 and O2 do not react to form another compound.

2) The equiblibrium equation is

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3) Then, the reverse reaction is

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Answer: 2NO → N2(g) + O2(g)
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