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aleksklad [387]
3 years ago
14

Scientists' belief that an atom is a solid sphere, is good enough to explain; PLZ I HAVE LESS TIME!!!!

Chemistry
1 answer:
Natasha2012 [34]3 years ago
7 0

Answer:

Its quite vague, instead you could say an atom is the smallest building block which further consists of subatomic particles like protons, neutrons and electrons :)

Hope thi helps :) and I'd appreciate if you'd mark brainliest because ive been stuck on the same rank for quite a long time :(

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Give an example of traits in a population that have changed in response to an environmental change.
mixer [17]

Answer:

When those traits change over time through many generations in response to changes in environmental conditions, scientists call that process adaptation. In the example of beetle color above, the yellow color trait supported successful survival and reproduction in the new environment.

4 0
3 years ago
How many electrons in the same atom can share the quantum number n = 2?
melisa1 [442]
With the principle quantum number being 2, the maximum number that can share this is 8. You can use the general formula 2n^2 to calculate this number (n=quantum level), or you can use the concept of quantum numbers (n, l, m, s) to justify this answer.
3 0
3 years ago
Density is the amount of mass per unit volume. True False
Dafna11 [192]

Answer:

True would be the correct answer

Hope this helps have an amazing day

4 0
4 years ago
Read 2 more answers
What are the two main categories of energy?
Lisa [10]
Kinetic and potential energy
5 0
4 years ago
For the reaction: 2 A+B 3 C the rate of disappearance of B was 0.30 M/s. What is the rate of disappearance of A and the rate of
GenaCL600 [577]

Answer:

rA = 0.60 M/s

rC = 0.90 M/s

Explanation:

Let's consider the following reaction:

2 A+B ⇒ 3 C

The rate of each substance can be calculated like the change in its concentration divided by the change in time. Given the rate must always be positive, we add a minus sign before the reactants change in concentration.

rA=-\frac{\Delta[A] }{\Delta t}

rB=-\frac{\Delta[B] }{\Delta t}

rC=\frac{\Delta[C] }{\Delta t}

The rate of the reaction is equal to the rate of each substance divided by its  stoichiometric coefficient.

r= \frac{rA}{2} =\frac{rB}{1} =\frac{rC}{3}

The rate of disappearance of B is 0.30 M/s.

The rate of disappearance of A is:

\frac{rA}{2} =\frac{rB}{1}\\rA = 2 \times rB = 2 \times 0.30 M/s = 0.60 M/s

The rate of appearance of C is:

\frac{rB}{1} =\frac{rC}{3}\\rC = 3 \times rB = 3 \times 0.30 M/s = 0.90 M/s

5 0
3 years ago
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