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Anastasy [175]
3 years ago
8

. Which best describes why scientific models change over time? (2 points) Models can be changed by scientists who are more famou

s than previous scientists. As technology advances, new experiments often expose problems in accepted theories. Scientists tend to value new theories because they are more exciting. A newer theory is more valid because it uses more mathematics.
Chemistry
1 answer:
goldfiish [28.3K]3 years ago
7 0
<span>As technology advances, new experiments often expose problems in accepted theories.

The advancement in technology allows scientists to explore more than previous scientists. Technology provides them with more tools to explore further. Technology can be used to prove or disprove old theories by uncovering more evidence. Fame has nothing to do with it, neither does excitement.</span>
You might be interested in
Complete the chart. (Remember to enter a "0" if necessary.) Atomic Number: 10 1s: 2s: 2p: 3s: 3p: 4s: 3d: 4p: 5s:
ASHA 777 [7]
First, we determine how many electrons can each subshell hold:
s can hold 2 electrons
p can hold 6 electrons
d can hold 10 electrons
f can hold 14 electrons

Second, we start distributing the 10 electrons on the orbitals of subshells based on the arrangement shown in the question :
1s will hold 2 electrons
2s will hold 2 electrons
2p will hold 6 electrons
All other orbitals will will hold zero electrons as the 10 were distributed among the first 2

Answer: 1s: 2
              2s: 2
              2p: 6 
<span>              3s: 0
              3p: 0
              4s: 0
              3d: 0
              4p: 0
              5s: 0</span>
7 0
4 years ago
A solution is prepared by mixing 2.88 mol of acetone with 1.45 mol of cyclohexane at 30°C. 2nd attempt Calculate the χacetone an
Volgvan
First c<span>alculate the mole fraction of each substance:
acetone: 2,88 mol </span>÷ (2,88 mol + 1,45 mol) = 0,665.
cyclohexane: 1,45 ÷ (2,88 mol + 1,45 mol) = 0,335.
Raoult's Law: 
P(total) = P(acetone) · χ(acetone)  + P(cyclohexane) · χ(cyclohexane).
P(total) = 229,5 torr · 0,665 + 97,6 torr · 0,335.
P(total) = 185,3 torr.
χ for acetone: 229,5 torr · 0,665 ÷ 185,3 torr = 0,823.
χ for cyclohexane:  97,6 torr · 0,335 ÷ 185,3 torr = 0,177.

8 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

#SPJ4

6 0
2 years ago
9.The industrial preparation of hydrogen gas from water gas is referred to as​
natima [27]

Answer: Bosch process

Explanation:

Bosch process is an industrial process for the manufacture of H2. This proces uses cheap raw materials( water and coke) to generate water gas which is mixed with water in the presence of a catalyst(iron(II) oxide or chromium(iii) oxide) to generate H2

6 0
4 years ago
A serving of fish contains 50 g of protein and 4 g of fat . if protein has a caloric value of 4.0kcal/g and fat has 9.1 kcal/g ,
weqwewe [10]

Answer:

2.4x10² kcal

Explanation:

As the serving of fish contains 50g of protein that is 4.0kcal/g:

50g × (4.0kcal/g) = <em>200kcal</em>

<em> </em>

And in 4g of fat that is 9.1kcal/g:

4g × (9.1kcal/g) = <em>36.4kcal</em>

<em />

That means the kcal of the serving are:

200kcal + 36.4kcal = 236.4kcal

In 2 significant figures: <em>2.4x10² kcal</em>

<em></em>

I hope it helps!

<em />

8 0
3 years ago
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