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Alenkinab [10]
4 years ago
6

Answer the following questions.

Chemistry
1 answer:
Fiesta28 [93]4 years ago
7 0
Mold fossils ( foddilized impression made in the sunstrate).
Cast fossils, formed when mold is filled in.
Trace fossils = ichnofossils (fossilized nest, gastroliths,
Footprint, burrow, etc..
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8 0
3 years ago
Which of the following is true of groups on the periodic table? A. Groups are horizontal and do not have the same properties. B.
Stells [14]
<span>Groups are vertical, numbered 1 through 18, and have similar properties, so answer D. Most of the properties of groups are defined by the outermost electron in the shells of the elements. Horizontal delineations in the Periodic Table are known as periods.</span>
3 0
3 years ago
How do you tell if an element is a solid, liquid or gas (ex. Na2S)
svetoff [14.1K]
Solids have a definite shape, and a definite volume.
Liquids have a definite volume, but have no definite shape.
Gas have neither a definite volume nor a definite shape.

Hope this helps!
4 0
4 years ago
Read 2 more answers
How many milliliters of a 5.0 M H2SO4 stock solution would you need to prepare 108.0 mL of 0.45 M H2SO4?
PIT_PIT [208]
For the purpose we will use solution dilution equation:
c1xV1=c2xV2
Where, c1 - concentration of stock solution; V1 - a volume of stock solution needed to make the new solution; c2 - final concentration of new solution; V2 - final volume of new solution.
c1 = 5.00 M
c2 = 0.45 M
V1 = ?
V2 = 108 L
When we plug values into the equation, we get following:
5 x V1 = 0.45 x 108
<span>V1 = </span>9.72 L
7 0
4 years ago
Density is the _____ of a certain ______
olga2289 [7]
I think the first blank is "solidity" and second is "object."
3 0
4 years ago
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