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UNO [17]
3 years ago
5

What does it mean to say that scientific models are open to change? (2 points)

Chemistry
1 answer:
Eva8 [605]3 years ago
6 0
Pretty sure the answer is B
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Please help! Refer to photo.
butalik [34]

Answer:

4-methyl-1-pentyne or 4-methylpent-1-yne

Explanation:

presence of triple bond(alkyne)

4 0
3 years ago
What type of change does electron have?
Valentin [98]
Proton—positive; electron<span>—negative; neutron—no charge. The charge on the proton and </span>electron<span> are the same size but opposite. The same number of protons and </span>electrons<span> exactly cancel one another in a neutral atom.</span>
7 0
3 years ago
Read 2 more answers
Use stoichiometry to calculate the number of moles produced of Iron (lll) oxide given three moles of water.
Tju [1.3M]
The balanced chemical equation is:
2Fe+3H2O=Fe2O3+3H2 
We are given the amount of water to be used in the reaction. This will be the starting point for the calculations.

3 mol H2O ( 1 mol Fe2O3 / 3 mol H2O ) = 1 mol Fe2O3

Therefore, the correct answer is option B.
6 0
4 years ago
In a mass spectrometer, the ions are sorted out in which of the following ways?
Tatiana [17]

Answer:

C

Explanation:

The ions are first accelerated electrically, and then bended magnetically to sort them and record them.

5 0
3 years ago
Why don’t all of the particles in an atom contribute to the mass?
kotegsom [21]

Answer:

Explanation:

The mass of an atom is dependent on its number of protons and neutrons. Electrons have mass, but are too light in comparison to protons and neutrons to contribute towards the overall mass. Their relative mass is about 1/1840 compared to 1 for protons and neutrons, and therefore are not counted in the mass.

Hope this helped!

4 0
3 years ago
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