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lozanna [386]
2 years ago
13

Population from the phylogenetic tree?

Chemistry
1 answer:
bogdanovich [222]2 years ago
4 0
Mark Brainliest please

Answer :

In my opinion , answer is A
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How do chemists solve problems?
Westkost [7]

Answer:Chemistry problems can be solved using a variety of techniques.

Explanation:  Many chemistry teachers and most introductory chemistry texts illustrate problem solutions using the factor-label method. ... The use of analogies and schematic diagrams results in higher achievement on problems involving moles, stoichiometry, and molarity. Hope this helped!

4 0
3 years ago
For each of the following cases, identify the order with respect to the reactant, A. Case (A ----> product)
damaskus [11]

Answer:

The answers to the question are

1. 2nd and above order order

2. 2nd order

3. 1/2 order

4.  1st order

5. 0 order

Explanation:

We have \frac{N}{N_{0} } = e^{-\lambda t}

1. For nth order reaction half life  t_{\frac{1}{2} } ∝ \frac{1}{[A_{0} ]^{n-1} }

Therefore for a 0 order reaction increasing concentration of the reactant there will increase   t_{\frac{1}{2} }

First order reaction    is independent  [A₀].

Second order reaction  [A₀] decrease,    increase.

Similarly for a  third order reaction

1. 2nd order

2. 2nd order reaction

3. Order of reaction is 1/2.

4. 1st order reaction.

5. Zero order reaction.

5 0
3 years ago
Which step of the scientific method involves identifying variables
Vlada [557]
Testing a typothesiss
3 0
3 years ago
Read 2 more answers
How many moles of copper Atoms are in 4 moles of Cu3(po4)2
Galina-37 [17]
12 moles, there is 3 moles of copper in one mole of Cu3 (PO4)2, there four multiple 3 by 4 and you get 12
6 0
3 years ago
What is the electron shielding effect? What is the trend for it? How and why does it happen?
andriy [413]

Answer:

See explanation

Explanation:

In an atom, the inner electrons may shield the outer electrons from the attractive force of the nucleus. We, refer to this phenomenon as the <u><em>shielding effect</em></u>, It is defined as a decrease in the magnitude of attraction between an electron and the nucleus of an atom having more than one electron shell (energy level).

Shielding effect increases down the group due to addition of more shells but decreases across the period due to the increase in the size of the nuclear charge.

As the magnitude of shielding increases down the group, ionization of electrons becomes easier and the first ionization energies of elements decreases as we move down the group. Since shielding effect decreases across the period, the first ionization energies of elements increases across the period.

6 0
2 years ago
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