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3 years ago

1.

Chemistry

2 answers:

Citrus2011 [14]3 years ago

6 0

Answer:

1. A

2. B

3. A

Explanation:

1. Heterotrophs are organisms that cannot make their own food and instead rely on others for energy. Heterotrophs are not individual cells , nor or they always single-celled. So, the answer is A.

2. Plants and animals have many similarities (both are eukaryotic and both are multicellular), but they also have key differences that make them unique from each other. One of these is that plants are autotrophs, which means that they can make their own food. So B is the answer.

3. Eukaryotes are organisms with a nucleus and membrane-bound organelles. This is in contrast with prokaryotes, which do not have these things. The answer is A.

mr_godi [17]3 years ago

3 0

Answer:

1. a) an organism that must eat food for energy since it cannot produce it's own food

2. plants make their own food

3. cells with membrane organelles

Explanation:

brainliest please

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Why is studying atoms and their parts and particles helpful to people?

ddd [48]

The study of atomic structure helps us understand more about the way the universe is constructed, how our bodies are made, and the components of life, which we can apply to other sciences in the fields of: health and disease prevention, fuels, product industry etc... It basically helps us to understand how we can make new things and how to utilize the power of the universe.

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3 years ago

Read 2 more answers

what discovery led to the abandonment of the atomic mass as the determining factor for organizing elements in the periodic table

Ostrovityanka [42]

Answer:

<em><u>A. isotopes </u></em>

Explanation:

The <em>periodic table</em> was organized by Dimitry Mendeleiev by 1869, as he showed the connection between the atomic mass and the properties of the elements.

Nevertheless, the order of some few elements had to be altered because the properties did not follow the order of the atomic masses.

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3 years ago

If 2.0×10−4 moles of S2O2−8 in 170 mL of solution is consumed in 170 seconds , what is the rate of consumption of S2O2−8?

Ostrovityanka [42]

Answer : The rate of consumption of $S_2O_2^{-8}$ is, $7.0\times 10^{-6}M/s$

Explanation : Given,

Moles of $S_2O_2^{-8}$ = $2.0\times 10^{-4}mol$

Volume of solution = 170 mL = 0.170 L (1 L = 1000 mL)

Time = 170 s

First we have to calculate the concentration.

$\text{Concentration}=\frac{\text{Moles}}{\text{Volume of solution}}$

$\text{Concentration}=\frac{2.0\times 10^{-4}mol}{0.170L}$

$\text{Concentration}=1.2\times 10^{-3}M$

Now we have to calculate the rate of consumption.

$\text{Rate of consumption}=\frac{\text{Concentration}}{\text{Time}}$

$\text{Rate of consumption}=\frac{1.2\times 10^{-3}M}{170s}$

$\text{Rate of consumption}=7.0\times 10^{-6}M/s$

Thus, the rate of consumption of $S_2O_2^{-8}$ is, $7.0\times 10^{-6}M/s$

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3 years ago

How many orbitlas does potassium have.

pychu [463]

Answer:

<h3><em /></h3><h3><em>Please make sure to re-write this so your teacher doesn't think your cheating!</em></h3>

Explanation:

To write the Potassium electron configuration, we first need to know the number of electrons for the K atom (there are 19 electrons). When we write the configuration we'll put all 29 electrons in orbitals around the nucleus of the Potassium atom.

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3 years ago

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stepladder [879]

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3 years ago