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3 years ago

DIRECTIONS: Underline the selected word item that best completes the statements.

Chemistry

1 answer:

tigry1 [53]3 years ago

3 0

Explanation:

(Climate, Weather) is an overall atmospheric condition of a place of 30 years and more while (Climate,Weather) is a condition for a short period of time.

2. (Climate, Weather) is influenced by latitude, altitude, ocean current, and topography.

3. The (higher, lower) the altitude, the (colder, warmer) the climate.

4. (Windward, Leeward) area of the mountain forms precipitation while (Windward,Leeward) gives dry air and warm weather.

5. Ocean currents bring (cold, warm) water and rain from the equator to the poles and (cold, warm) water from the poles toward the equator

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Identify the conjugate base in each pairs

DiKsa [7]

Answer: 1) $RCOO^-$

2) $H_2PO_4^-$

3) $RNH_2$

4) $HCO_3^-$

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

1) $RCOOH\rightarrow RCOO^-+H^+$

Here, $RCOOH$ is loosing a proton, thus it is considered as an acid and after losing a proton, it forms $RCOO^-$ which is a conjugate base.

2) $H_3PO_4\rightarrow H_2PO_4^-+H^+$

Here, $H_3PO_4$ is loosing a proton, thus it is considered as an acid and after losing a proton, it forms $H_2PO_4^-$ which is a conjugate base.

3) $RNH_3^+\rightarrow RNH_2+H^+$

Here, $RNH_3^+$ is loosing a proton, thus it is considered as an acid and after losing a proton, it forms $RNH_2$ which is a conjugate base.

4) $H_2CO_3\rightarrow HCO_3^-+H^+$

Here, $H_2CO_3$ is loosing a proton, thus it is considered as an acid and after losing a proton, it forms $HCO_3^-$ which is a conjugate base.

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3 years ago

(a) How much negative charge is on each oxygen of the carbonate ion?

Eva8 [605]

The chemical formula of a carbonate ion is CO3^2-. It is an AX3 system which means it take the trigonal planar shape. There would be two single bonds of C-O and one double bond C-O in order for C to agree with the octet rule. Two minus charges are equally distributed to the three oxygen atoms so that each oxygen of the carbonate ion would have a charge of negative 2/3.

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3 years ago

Which of the following atoms has the highest electronegativity?

katrin [286]

A. Chlorine is the most electronegative element out of the possible choices. Generally (though not 100% of the time) electronegativity increases as you go further left and up the periodic table.

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Answer: ability to undergo a chemical reaction

Explanation:

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Juliette [100K]

Answer:

Nuclear reaction takes place at the nucleus whereas chemical reaction involves valence electrons

Explanation:

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