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drek231 [11]
3 years ago
9

How many significant figures are in the following number? 0.000485

Chemistry
2 answers:
aliina [53]3 years ago
8 0

Answer:

4 or 3

Explanation:

almond37 [142]3 years ago
5 0

Answer:

6

Explanation:

The number behind the decimal all of them are representing a place on the number line therefore they are all serving a purpose.

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True or false a contour line indicates that all points on that line have equal elevation
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True. Each contour line on a topographic map represent a certain elevation; the closer they are, the steeper the surface is. All points on a contour line are the same elevation.
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Describe some conditions in Antarctica that could lead to chemical weathering
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4 years ago
Alkanes are chains of carbon atoms surrounded by hydrogen atoms. <br><br> a. True<br> b. False
Ne4ueva [31]

Answer:

a. True

Explanation:

Alkanes are chains of carbon atoms surrounded by hydrogen atoms. TRUE.

Alkanes are hydrocarbons, that is, they are organic compounds formed only by carbon and hydrogen. In alkanes, carbon atoms are bonded to each other through single covalent bonds and they are also bonded to hydrogen atoms through the same type of bonds. Alkanes have the general formula CnH2n+2.

7 0
3 years ago
Please answer both questions.
Deffense [45]

Answer:

1)Krypton

2)11H

Explanation:

electrons=protons

protons=atomic number

mass number=protons+neutrons

mass number is the superscript

atomic number is the subscript.

1)The answer is Krypton because its atomic number= number of protons=number of electrons is 36.

mass number is 46+36=82.

2)subscript=atomic number=number of protons=number of electrons

i. H = electrons=1

=neutrons=0

ii. Cl=electrons=17

=neutrons=35-17=18

iii. Na=electrons=11

=neutrons=23-11= 12

so the answer is Hydrogen because it has 1 electron and 0 neutron.

I hope this helps.

6 0
3 years ago
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