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Marina86 [1]
2 years ago
5

Who thought fire was one of four elements?

Chemistry
2 answers:
xeze [42]2 years ago
7 0
I would say it is A. Aristotle
maw [93]2 years ago
5 0

Answer:

D Robert Boyle

Explanation:

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Which scenario involves a
olga_2 [115]

Answer:

Amount of products and reactants is constant...Although,if any of the factors that interfere this scenerio is involved then there will be a shift or change...

6 0
3 years ago
An atom with an atomic number of 10 and a mass number of 24 would have ________.
Anastaziya [24]

An atom with an atomic number of 10 and a mass number of 24 would have 14 neutrons.

<h3>What is atomic number and mass number?</h3>

The term atomic number, conventionally denoted by the symbol Z.

Atomic number indicates the number of protons present in the nucleus of an atom, which is also equal to the number of electrons in an uncharged atom.

The mass number of a given atom is defined by the number of protons and neutrons present in the nucleus. In simple,

Protons + Neutrons = Mass Number

To learn more about atoms, refer

https://brainly.in/question/5318

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6 0
2 years ago
1. For the reaction 3A — C, the initial concentration of A was 0.2 M, and the reaction rate was
Andrew [12]

Answer:

r=25M^{-1}s^{-1}[A]^2

Explanation:

Hello there!

In this case, according to the given information for this chemical reaction, it is possible for us to set up the following general rate law and the ratio of the initial and the final (doubled concentration) condition:

r=k[A]^n\\\\\frac{r_1}{r_2} =\frac{k[A]_1^n}{k[A]_2^n}

Next, we plug in the given concentrations of A, 0.2M and 0.4 M, the rates, 1.0 M/s and 4.0 M/s and cancel out the rate constants as they are the same, in order to obtain the following:

\frac{1.0}{4.0} =\frac{0.2^n}{0.4^n}\\\\0.25=0.5^n\\\\n=\frac{ln(0.25)}{ln(0.5)} \\\\n=2

Which means this reaction is second-order with respect to A. Finally, we calculate the rate constant by using n, [A] and r, to obtain:

k=\frac{r}{[A]^n} =\frac{1.0M/s}{(0.2M)^2}\\\\k=25M^{-1}s^{-1}

Thus, the rate law turns out to be:

r=25M^{-1}s^{-1}[A]^2

Regards!

3 0
3 years ago
How many dollars are in 140 dimes? using dimensional analysis
Nutka1998 [239]

Answer:

1 dollar

Explanation:

3 0
1 year ago
Help with this please :) will mark Brainlyist if right
MaRussiya [10]

Answer:

3

Explanation:

7 0
2 years ago
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