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3 years ago

When a scientific investigation runs for several years, which is most likely true?

Chemistry

2 answers:

Bingel [31]3 years ago

4 0

Answer:

1. Many different hypotheses will be tested.

Explanation:

Scientists test every hypothesis they make for their investigation, before moving onto bigger conclusions.

postnew [5]3 years ago

4 0

It’s 2 i think it’s probably but im sure it’s 2

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Using spectroscopic notation write the complete electron configuration for the fluorine atom. Using noble gas notation write the

prohojiy [21]

Explanation:

Flourine has atomic number of 9 and hence 9 electrons in its neutral state. The full electronic configuration is given as;

1s2 2s2 2p5

Carbon has atomic number of 6 and hence 6 electrons in it's neutral state. The noble gas notation as the following format;

[closest noble gas before the element] remaining electrons

The nearest noble gas to carbon is Helium, the noble gas notation is given as;

[He] 2s4

3 0

3 years ago

Atomic emission spectra are produced when the light emitted by an element passes through a prism. Which of the following stateme

xenn [34]

Option C: elements produce spectra with only few distinct lines.

The spectra are not continuos and are different for every element. This permits to identify elements.

3 0

3 years ago

What is the percent composition of hydrogen in NH4HCO3?

Readme [11.4K]

To find the Percent Composition of an atom, you use this formula:
Mass of element in the compound you're studying on ( in this case it's 5 since there is 5 Hydrogens) over the mass of the compound (which is here 79), Multiplied by 100 since you want a percent.
So we get:
$\frac{5}{79} * 100$
So you get about:
$0.063 * 100$
$6.3$

So, the percent composition of Hydrogen in NH4HCO3 is 6.3%

Hope this Helps! :D

7 0

3 years ago

Read 2 more answers

4. Which atomic particles are found inside the nucleus of an atom?

grin007 [14]

Answer:

the atomic particles in the necluse are called ions which are positive and negive charged atoms

Explanation:

6 0

3 years ago

What was the main reason why Alfred Wegener's theory about the movement of the continents was dismissed in 1912?

eduard

Answer:

His map of the ocean floor did not support his theory

Explanation:

Alfred Wegner was a great scientist
He observed the plate tectonics of earth and described it in a theory.
It was dismissed after viewing his ocean floor

8 0

3 years ago