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2 years ago

Identify corresponding correct resonance structures

Chemistry

1 answer:

Vitek1552 [10]2 years ago

8 0

Answer:

III IV first one

Explanation:

sorry if im wrong ~Bread

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Which of the following would you expect to form an ionic bond when combined?

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Ionic bond forms between metal and non-metal.

Na is a metal, and F is a nonmetal.

Na and F form ionic bond.

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3 years ago

The ion with the smallest diameter is ________. The ion with the smallest diameter is ________. Be2 Sr2 Ca2 Ba2 Mg2

mart [117]

Answer:

Be2^+

Explanation:

Ionic diameter increases down the group. This implies that Be2^+ will have the smallest diameter.

This extremely small diameter makes Be2^+ to differ considerably from other ions of group 2 elements.

For instance, the compounds of beryllium are mostly covalent in nature.

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4 years ago

What is the empirical formula of a compound which contains 84.4% c and 15.6% h by mass?

podryga [215]

Answer: The empirical formula for the given compound is $CH_2$

Explanation : Given,

Percentage of C = 84.4 %

Percentage of H = 15.6 %

Let the mass of compound be 100 g. So, percentages given are taken as mass.

Mass of C = 84.4 g

Mass of H = 15.6 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Carbon = $\frac{\text{Given mass of Carbon}}{\text{Molar mass of Carbon}}=\frac{84.4g}{12g/mole}=7.03moles$

Moles of Hydrogen = $\frac{\text{Given mass of Hydrogen}}{\text{Molar mass of Hydrogen}}=\frac{15.6g}{1g/mole}=15.6moles$

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 7.03 moles.

For Carbon = $\frac{7.03}{7.03}=1$

For Hydrogen = $\frac{15.6}{7.03}=2.22\approx 2$

Step 3: Taking the mole ratio as their subscripts.

The ratio of C : H = 1 : 2

Hence, the empirical formula for the given compound is $C_1H_2=CH_2$

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3 years ago

Explain in brief how some bacteria cause tooth cavities

soldier1979 [14.2K]

Answer:

because some bacteria change the ph of the teeth and leads to tooth cavitiew

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3 years ago

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what relationships can exist between organisms in ecosystems and how do organisms interact in order to survive

Paraphin [41]

Answer:

The interaction among organisms within or between overlapping niches can be characterized into five types of relationships: competition, predation, commensalism, mutualism and parasitism.

Explanation:

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3 years ago