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3 years ago

How can you which molecule is positive and negative in a dipole-dipole relationship?

1 answer:

5 0

Dipole interactions are observed in covalent bonds. In ionic bonding, permanent transfer of electrons occurs and due to this dipole-dipole interactions are not observed. In covalent bonding, electron cloud is shared between 2 atoms. If this electron cloud is not shared equally between them, polarities are formed in a molecule. And hence we say that the molecule is polar. For a molecule to be polar, there should be electronegativity difference between them. Atom with greater electronegative attracts electron cloud more towards itself whereas atom with lesser electronegative attracts electron cloud less. But there is no permanent transfer of electrons. Due to this electronegativity differences, atom with more electronegative gains partial negative charge and atom with lesser electronegative value gains partial positive charge. The charge is partial because there is no complete transfer of electrons.

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V 12 > A À BI U ON AVA Ev Eva Indicate whether the statement is true or false. 1. It is easier to carry out a controlled expe

garri49 [273]

Answer:

1 is true 2 is flase and 3 is true

Explanation:

7 0

2 years ago

Read 2 more answers

How are the excited electrons from stage 1 used in stage 2 of photosynthesis? A. Splitting of water b. Carbon fixation c. Format

Gnom [1K]

Answer;

D. Formation of NADPH

Explanation;

During the process of photosynthesis light is converted to chemical energy.

During stage 1, Excited electrons that leave the chlorophyll pigments in stage 1 are used. Excited electrons are passed through proteins in the thylakoid membrane like a ball being passed from person to person. H2o molecules split and turn into H+ molecules and O2 gas, then pigments take the electrons from the split water molecules and release O2 into the atmosphere.

During stage 2; electrons from 1st cluster pump H+ ions into the thylakoid membrane through the hydrogen ion pump (protein membrane. Higher concentration of H+ ions inside the thylakoid membrane compared to outside. H+ ions diffuse out of the thylakoid throught the ATP synthase (enzyme in membrane). ATP synthase catalyzes the reaction ADP + P ---->ATP.

Stage 2; Excited electrons + H+ ions + NADP+= NADPH

6 0

3 years ago

The name of the compound with the formula ZnBr2 is

Brilliant_brown [7]

Zinc-bromide is its name. Since you have a metal and a non metal you don’t need to use the prefix “di” for the Br.

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3 years ago

Read 2 more answers

A 1.00 liter solution contains 0.49 moles hydrocyanic acid and 0.38 moles sodium cyanide . If 0.19 moles of hydrochloric acid ar

kompoz [17]

Answer:

A)true

B)false

C)true

D)false

E)false

Explanation:

Step 1: Data given

Volume = 1.00 L

Number of moles HCN = 0.49 moles

Number of moles NaCN = 0.38 moles

Number of moles HCl added = 0.19 moles

Step 2:

This is a buffer system consisting of a weak acid, HCN and the salt of that acid, NaCN.

Upon addition of hydrochloric acid (HCl), HCN is formed and NaCl is used up.

HCl + NaCN ⇔ NaCl + HCN

A. The number of moles of HCN will increase. This is true.

B. The number of moles of CN- will increase.

⇒ false, The number of moles of CN- will decrease b/c it is now part of HCN, a weak acid.

C. The equilibrium concentration of H3O will increase.

⇒ True, The [H3O+] will increase slightly.

D. The pH will increase.

⇒ False, The pH will decrease slightly because acid is being added and being converted to HCN

E. The ratio of [HCN] / [CN-] will remain the same.

⇒ False. It will increase.

6 0

3 years ago

How long dows it take a moon to reacg a ful phase

FrozenT [24]

Answer:

about 29.5 days

Explanation:

it takes 27 days, 7 hours and 43 mins for our moon to complete a full orbit around the earth.

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3 years ago