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Lostsunrise [7]
3 years ago
10

Which which atom is held together by covalent bonds?​

Chemistry
1 answer:
Sedaia [141]3 years ago
4 0
Covalent bonds are strong bonds. Atoms that share pairs of electrons form molecules. A molecule is a group of atoms held together by covalent bonds. A diatomic molecule is a molecule containing only two atoms.
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3.65 gram of hcl is dissolved in 180 gram of water. Find the total number of molecules of hydrogen​
Morgarella [4.7K]

Answer:

Molec_{\ H_{tot}}=1.206x10^{25}molec

Explanation:

Hello.

In this case, taking into account that HCl has one molecule of hydrogen per mole of compound which weights 36.45 g/mol, we compute the number of molecules of hydrogen in hydrochloric acid by considering the given mass and the Avogadro's number:

molec_{\ H}=3.65gHCl*\frac{1molHCl}{36.45gHCl} *\frac{1molH}{1molHCl}*\frac{6.022x10^{23}molec_\ H}{1molH}  =6.03x10^{22}molec

Now, from the 180 g of water, we see two hydrogen molecules per molecule of water, thus, by also using the Avogadro's number we compute the molecules of hydrogen in water:

molec_{\ H}=180gH_2O*\frac{1molH_2O}{18gH_2O} *\frac{2molH}{1molH_2O}*\frac{6.022x10^{23}molec_\ H}{1molH}  =1.20x10^{25}molec

Thus, the total number of molecules turns out:

Molec_{\ H_{tot}}=6.03x10^{22}+1.20x10^{25}\\\\Molec_{\ H_{tot}}=1.206x10^{25}molec

Regards.

6 0
3 years ago
Help me please (~ ̄_ ̄)~​
Lubov Fominskaja [6]

Answer:

1.Temperature is the answer.

Explanation:

Hope this help!!

5 0
2 years ago
Read 2 more answers
Match each statement with one of these terms.
skelet666 [1.2K]

Answer:

1 - e, 2 - k, 3 - a, 4 - i, 5 - b,

Explanation:

The ratio of the amount of analyte in the stationary phase to the amount in the mobile phase. --- Retention factor.

Time it takes after sample injection into the column for the analyte peak to appear as it exits the column. -- Retention time

The process of extracting a component that is adsorbed to a given material by use of an appropriate solvent system. -- Elution

Measure of chromatographic column efficiency. The greater its value, the more efficient the column. -- Theoretical plate number

Gas, liquid, or supercritical fluid used to transport the sample in chromatographic separations. -- Mobile phase

Immiscible and immobile, it is packed within a column or coated on a solid surface. -- Stationary phase

8 0
2 years ago
Cabr2 will most likely dissolve in which solvent? 1. bi3 2. h2o 3. br2 4. ccl4 5. c8h18
77julia77 [94]
General principle of solubility is 'like dissolves like'

CaBr_{2} is an ionic compound, wherein the constituent ions (Ca^{2+} and Br^{-}) are held by electrostatic forces of interaction. 

Such ionic compounds are soluble in polar solvents. 

Among the solvent mentioned in question, water (H_{2}O) has maximum polarity. Hence, CaBr_{2} is most likely to dissolve in H_{2}O
5 0
3 years ago
Does HNO3 conduct electricity?
Bumek [7]

Answer:

The polar nature of water splits the acid molecules into its cations and anions. Cations and anions are charged particles and are free to move inside the aqueous medium. As a result when a potential difference has applied the solution to conduct electricity.

Explanation:

hope it helps

6 0
2 years ago
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