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kirill115 [55]
3 years ago
8

Some farmers of vegetables and fruits from flowering plants pay beekeepers to bring their beehives to their land each year. Why

is this?
1. Flowering plants rely on pollinators to survive.
2. Flowering plants depend on bees for self-pollination.
3. Bees help protect their crops.
4. Bees eat the sweet nectar of the fruits that grow.
Chemistry
2 answers:
Jobisdone [24]3 years ago
8 0

Answer:

Number 2

Explanation:

laiz [17]3 years ago
7 0

Answer:

option 2nd is correct answer of this question

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If an acid has a ka=1.6x10^-10, what is the acidity of the solution?
LUCKY_DIMON [66]
The information given in the question is not enough to determine the acidity of the solution. This is because, acidity can only be found with the equation: pH = -log [H+].
 In order to determine the acidity of the solution, the half titration point value is needed, this will make it possible to determine the value of H30+.  If the half point titration value is known, then Ka will be equivalent to pH and the value will be evaluated using the equation: - log (1.6 * 10^-10).
5 0
3 years ago
the pressure of a fluid varies with depth because of: a. volume b. Gravity c. temperature d. all of the above
bulgar [2K]
The pressure of a cloud varies with depth because of volume.
3 0
3 years ago
Phenol, c6h5oh, is a stronger acid than methanol, ch3oh, even though both contain an o]h bond. Draw the structures of the anions
timurjin [86]

In resonance structures, the chemical connectivity in the molecule is same but the distribution of electrons are different around the structure.  They are created by moving electrons in double or triple bonds, and not atoms.

Phenol, C_6H_5OH and methanol, CH_3OH both are alcohols  that contain an -OH group attached to carbon atom.

Due to loss of 1 H from phenol, it forms phenoxide anion and due to presence of double bond in the benzene ring the negative charge on the oxygen atom (which represents electrons) will resonate with double bonds of benzene ring as shown in the image. The resonance-stabilized phenoxide ion is more stable. Whereas when methanol lose 1 H it forms methoxide anion and there are no such electrons present in the structure of methoxide that will result in the movement of electron. Since, due to resonance-stabilized phenoxide ion is more stable than methoxide ion, so it is a stronger acid.

The structures of the anions resulting from loss of 1 H from phenol and methanol is shown in the image.

8 0
3 years ago
The temperature of a gas is 100 K and its volume is 500.0 ml. If the volume increases to 1,000.0 ml,
olga55 [171]
1000000000000000 that’s the answer
5 0
3 years ago
How much heat is required to melt 20 g of gold at 1064.18 °C with a heat of fusion of 64 J/g *
andrew-mc [135]

Answer:

1280J are required.

Explanation:

Heat of fusion is defined as the amount of heat required to change its state from liquid to solid at its melting point at constant pressure.

As heat of fusion of gold is 64J/g, there are required 64J to melt 1g of gold at its melting point. The energy required to melt 20g is:

20g * (64J/g) =

1280J are required

6 0
3 years ago
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