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IgorLugansk [536]
3 years ago
9

Changes that occur during a chemical reaction are represented by a(n) _?_.

Chemistry
1 answer:
bixtya [17]3 years ago
3 0

Answer:

Explanation:

What does it mean by are represented by is it like cells when things can a cell molecule?

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Arrange the following elements in order of decreasing metallic character.
Ivenika [448]

The arrangement of the elements in order of decreasing metallic character is: Rb, Zn, P, S, F, Ca, Co, Cr

<h3 /><h3>What are metals?</h3>

Metals are elements which are known by their special ability to form ions by a loss of electrons.

The increasing metallic character of metal is a measure of their ability to lose electrons.

Metallic character increases from right to left and down a group in the period table.

Metals are found to the left of the period table.

In conclusion, metals are known by their ability to lose electrons.

Learn more about metals at: brainly.com/question/25597694

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8 0
2 years ago
9. the answer is not 100.0(ect.), plese help me
ArbitrLikvidat [17]
2.56 is the answer !!!!
5 0
2 years ago
Read 2 more answers
Make a checklist of eight good characteristics of a experiment.
natka813 [3]
I could only find 7!

- independent variable
- dependent variable
- control group
- experimental group
- constant
- observation
- inference
6 0
3 years ago
An unknown compound contains 75.69% carbon, 8.80% hydrogen, and 15.51% oxygen by mass. A mass spectrometry analysis reveals that
tiny-mole [99]

Answer:

Molecular formula is C₂₆H₃₆O₄

Explanation:

The compound is 75.69 % C, 8.80 % H and 15.51 % O. This data means, that in 100 g of compound we have 75.69 g, 15.51 g and 8.80 g of, C, O and H, respectively. We know the molar mass of the compound, so we can work to solve the moles of each element.

In 100 g of compound we have 75.69 g C, 15.51 g O and 8.80 g H

In 412 g of compound we would have:

(412 . 75.69) / 100 = 311.8 of C

(412 . 15.51) / 100 = 63.9 g of O

(412 . 8.80) / 100 = 36.2 g of H

Now, we can determine the moles of each, that are contained in 1 mol of compound.

312 g / 12 g/mol 26 C

64 g / 16 g/mol = 4 O

36 g / 1 g/mol = 36 H

Molecular formula is C₂₆H₃₆O₄

4 0
3 years ago
What are lone pairs of electrons?
ozzi
A lone pair is a pair of valence electrons that are not shared with another atom and is sometimes called a non-bonding pair.
5 0
3 years ago
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