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spayn [35]
3 years ago
15

Notice the populations decrease as you go from the bottom of the food chain to the top. Why do you think this is so?

Chemistry
2 answers:
kodGreya [7K]3 years ago
5 0
Exactly what the person above me said
Ira Lisetskai [31]3 years ago
4 0
Populations decrease at a higher level of the food chain because they require more energy from the other organisms
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Two stones resembling diamonds are suspected of being fakes. To determine if the stones might be real, the mass and volume of ea
Charra [1.4K]

Answer:

Stone A

Explanation:

Measuring density is an easiest way to determine if two similar looking substances are same or not. Here also we need to perform the density test for each stone that is suspected to be fake diamond. We will calculate the density of each stone and compare it with the density of original diamond.

Density is calculated using the formula

Density=\frac{Mass}{Volume}

It has been given in the question that both the substances have same volume of 0.15 cm^3.

Density of stone A = \frac{0.52}{0.15} = 3.47 gcm^-^3 or after rounding off we get 3.5 gcm^-^3

Density of stone B = \frac{0.42}{0.15} = 2.8 gcm^-^3

It is clear from the above calculation that the stone A has same density as the diamond but stone B lacks behind in density.

So, stone A could be the real diamond.

4 0
3 years ago
A sample of a monoprotic acid (ha) weighing 0.384 g is dissolved in water and the solution is titrated with aqueous naoh. if 30.
posledela
The formula for the monoprotic acid is taken as HA, reaction with base is as follows;
HA + NaOH ---> NaA + H₂O
Stoichiometry of acid to base is 1:1
At the neutralisation point, number of HA moles = number of base moles
Number of NaOH moles reacted = 0.100M / 1000 mL /L x 30.0 mL = 0.003 mol
Therefore number of HA moles reacted = 0.003 mol
the mass of acid 0.384 g
Therefore molar mass - 0.384 g/ 0.003 mol = 128 g/mol
3 0
3 years ago
Why is it important to keep high acid food away from zinc coated tub
denis23 [38]
The reactions that will take place will generate Zinc salts that will taint the food. Excessive levels of these salts can cause sickness, so it is very important to ensure food hygiene standards are met by keeping acidic foods away from damaging materials like zinc that will erode and get into the food.
3 0
3 years ago
How are plant cells different from animal cells?
marusya05 [52]

Answer:

b.

They can convert the sun's energy into food.

8 0
2 years ago
Read 2 more answers
Why is steam distillation prefered over fractional distillation for the extraction of essencial oils?​
frez [133]

Answer:

Because , the advantage of steam distillation over simple distillation is that the lower boiling point reduces decomposition of temperature-sensitive compounds. Steam distillation is useful for the purification of organic compounds, although vacuum distillation is more common

Explanation:

7 0
3 years ago
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