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Reil [10]
3 years ago
12

What is the main function of a vacuole in a cell?

Chemistry
1 answer:
snow_tiger [21]3 years ago
3 0
TO hOlD dEm liQuiDs boiIII

Provide the plant with support, storage for waste or nutrients, can also store water
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Which of the following for an object should be known to calculate its density
k0ka [10]

Density = mass / volume

therefore, both mass and volume are needed

the first one represents volume

The Space it occupies is the answer

4 0
3 years ago
How do electronegativity values help us determine the type of bond created?
Ann [662]

Answer: The difference between the electronegativity or (∆EN) of two different atoms indicates the type of bond created.

Explanation: For ionic bond compounds the difference between their electronegativity is 1.7 or greater. Covalent bond compounds have a difference of 0.4 but not greater than 1.7 on their electronegativity.

6 0
3 years ago
Lead (Pb) is used to make a number of different alloys. What is the mass of lead present in an alloy containing 0.15 mol of lead
Vesna [10]
Lead is 207.2 g/mol.
0.15 mol (\frac{207.2g}{mol}) = 31.08 g Pb
3 0
3 years ago
Construct a three-step synthesis of 3-bromo-3-methyl-2-butanol from 2-methyl-2-butene by dragging the appropriate formulas into
juin [17]

Answer:

See explanation

Explanation:

In order to do this, we need to use 3 reagents to get the final product.

The first one, and logic is the halogenation of the alkene. Doing this, with Br2/CCl4, we'll get an alkane with two bromines, one in carbon 2 and the other in carbon 3.

Then, the next step is to eliminate one bromine of the reactant. The best way to do this, is using sodium ethoxide in ethanol. This is because sodium ethoxide is a relatively strong base, and it will promove the product of elimination in major proportions rather than the sustitution product. If we use NaOH is a really strong base, and it will form another product.

When the sodium ethoxide react, it will form a double bond between carbon 1 and 2 (The carbon where one bromine was with the methyl, changes priority and it's now carbon 3).

The final step, is now use acid medium, such H3O+/H2O or H2SO4/H2O. You can use any of them. This will form an carbocation in carbon 2 (it's a secondary carbocation, so it's more stable that in carbon 1), and then, the water molecule will add to this carbon to form the alcohol.

See the attached picture for the mechanism of this.

4 0
3 years ago
Electromagnetic waves are used in many technological devices. Describe two examples of how energy from electromagnetic waves is
kykrilka [37]

Answer:

Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.

Explanation:

i mean there's alot of stuff that have Electromagnetic waves in it i mean alot!

3 0
3 years ago
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