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2 years ago

A weather map is an example of a

Chemistry

2 answers:

arlik [135]2 years ago

5 0

C. Model. It's a graphical model that displays one or more weather elements.

son4ous [18]2 years ago

3 0

The answer is c, kia1800 is correct because like that person said it's a graphical model that displays one or more weather elements. A hypothesis is a prediction made, based on observations, about the results of a scientific story or experiment so that's not the answer. A scientific theory try to explain an observation by experimentation and observations so that isn't the answer either. Also a variable are the things in a experiment that changes so that also isn't the answer.

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1 km is equal to 100 m 10,000 dm 1,000 mm 1,000 cm

vovikov84 [41]

The answer would be B) 10,000 DM is equal to 1 kilometer.

3 0

3 years ago

Which reaction below represents a balanced, single replacement chemical reaction?

kenny6666 [7]

The balanced chemcial equation is B. So to do single, we need to look at where would Li stand on the metals chart (For my class we have a chart to see which element is the highest on the metals chart) . So since Li is higher, F needs to go with Li, leaving Ba alone.

I hope this helps you!

7 0

2 years ago

Read 2 more answers

What is a change in which energy is released is called

inessss [21]

Answer: Chemical Reactions

Explanation:

Chemical reactions often involve changes in energy due to the breaking and formation of bonds.

4 0

2 years ago

Devices that allow you to do work in an easier way.

IrinaVladis [17]

Answer:

The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw, and the wedge, although the latter three are actually just extensions or combinations of the first three.

6 0

2 years ago

Read 2 more answers

Elements donate 2 electron to produce a cation with a 2+ charge

hammer [34]

Answer: alkaline earth metals (group-IIA)

Explanation:

The element which donates the electron is known as electropositive element and forms a positively charged ion called as cation. The element which accepts the electrons is known as electronegative element and forms a negatively charged ion called as anion.

Alkaline earth metals donate 2 valence electrons to acquire noble gas configuration.

For example: Berrylium is the first alkaline earth metal with atomic number of 4 and thus has 4 electrons

Electronic configuration of berrylium:

$[Be]:4:1s^22s^2$

Berrylium atom will loose two electrons to gain noble gas configuration and form berrylium cation with +2 charge.

$[Be^{2+}]:2:1s^2$

Thus Elements donate 2 electron to produce a cation with a 2+ charge are alkaline earth metals.

5 0

2 years ago