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Jlenok [28]
3 years ago
12

(SCIENCE)

Chemistry
1 answer:
olga nikolaevna [1]3 years ago
6 0
A. Amber

Explain:
Amber is a fossilized tree resin. The tree responsible for production of amber existed on Earth 25-323 million years ago and are already extinct. This is exactly why, by its nature, amber is not a stone or mineral.
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Help? I'll give 20 points!!!!!!
natima [27]
The answer is A. Two molecules of potassium chloride react with one molecule of lead nitrate to form two molecules of potassium nitrate and one molecule of lead chloride.
4 0
3 years ago
When measuring water using the graduated pipette, the mass of beaker and the water is 23.670 g. If the empty beaker weighs 13.71
Arturiano [62]

Answer:

The volume of water measured is 10mL

Explanation:

Given;

Mass of mass of beaker and the water = 23.670 g

Mass of empty beaker = 13.712 g

Then, mass of water only = Total mass of of beaker and the water minus Mass of empty beaker

mass of water only = 23.670 g - 13.712 g = 9.958 g

Density = mass/volume

Given density of water = 0.9982071 g/mL

Density of water = Mass of water/ Volume of water

Then, Volume of water =  Mass of water/Density of water

Volume of water = 9.958 g/0.9982071 g/mL

Volume of water = 9.975886 mL ≅ 10mL

Therefore, The volume of water measured is 10mL

6 0
4 years ago
The photograph shows a mixture of nuts and bolts that are made of either steel or aluminum. Which physical property is best used
LekaFEV [45]

Answer:magnetic attraction

Explanation:

It's C I just took the quiz mark me beainliest

7 0
3 years ago
Layers of particles can slip and slide over one another easily. name the state of matter?
lianna [129]
That state of matter is known as liquid.
5 0
4 years ago
Read 2 more answers
What is the positive ion of calcium and nitrogen
Sergio [31]
Calcium, which is in Period 2 and has 2 valence electrons, has an ion of Ca 2+

This is because it can give up the two electrons to get a full outer shell.

Nitrogen, on the other hand, has 5 valence electrons. To get a full outer shell, it can either gain 3 electrons or lose 5. Since it is easier to gain 3, Nitrogen usually gains 3 electrons to form a N3- ion.

Even though it is rare, it is possible for Nitrogen to form a positive ion, which is N5+

Hope I helped!! xx
3 0
4 years ago
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