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Svetradugi [14.3K]
3 years ago
13

How many elements are there?

Chemistry
2 answers:
s344n2d4d5 [400]3 years ago
6 0
There are 118 elements currently on the periodic table.
svlad2 [7]3 years ago
5 0

Answer:

118 is your answer!

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Why are iron needles used in compasses
ludmilkaskok [199]

A compass needle points north because the north pole of the magnet inside it is attracted to the south pole of Earth's built-in magnet . <u><em>And irons are heavily attracked to magnet</em></u> .So this is why iron needles used in compasses .

4 0
2 years ago
Please choose the best description, or definition for Principle of Fossil Correlation
Novay_Z [31]

Answer:

states that rock layers with the same unique groupings of fossils are of the same geologic age.

Explanation:

The principle of fossil correlation states that the presence of similar fossils of dead organisms in rock layers indicates that the organisms under investigation must have existed around the same geologic time. This principle can be used in dating the periods when the organism being studied lived.

The geological age system follows a chronological format in tracking the age of an item under study by grouping the time periods that organisms lived into strata.

7 0
3 years ago
A chemistry student needs 65.0 mL of carbon tetrachloride for an experiment. By consulting the CRC Handbook of Chemistry and Phy
Anna007 [38]

Answer:

103.3 g

Explanation:

Data Given:

Volume of carbon tetrachloride (v) = 65.0 mL

Density of carbon tetrachloride (d) = 1.59 g/cm³

Solution:

Convert volume of carbon tetrachloride from ml to cm³

1 ml = 1 cm³

so,

65.0 mL = 65.0 cm³

Formula used to calculated mass of carbon tetrachloride should be taken for experiment.

                   d = m/v

Rearrange the above equation:

                   m = d x v . . . . . . .(1)

Put values in equation 1

                   m = 1.59 g/cm³ x 65.0 cm³

                   m = 103.3 g

6 0
3 years ago
ILL GIVE BRAINLIEST! :).
fomenos
Option 2 is the correct answer
3 0
3 years ago
What would likely happen if you were to touch the flask in which an endothermic reaction occurring
coldgirl [10]

Answer:

The reaction vessel will feel cool

Explanation:

In an endothermic reaction, heat is absorbed by the reaction system from the surrounding. The withdrawal of heat from the surrounding causes the reaction vessel to feel cool.

Hence when an endothermic reaction is going on, the reaction vessel feels cool when touched.

5 0
3 years ago
Read 2 more answers
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