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notsponge [240]
3 years ago
14

NEED HELP DESPERATELY!!!

Chemistry
2 answers:
Yakvenalex [24]3 years ago
6 0

Answer:

The density of tube A is greater then the density of tube B having more mass inside of the smaller area.

Explanation:

stepladder [879]3 years ago
5 0

Answer:

A is denser.

Explanation:

You might be interested in
What is missing from this graph?<br><br> A. axis labels<br> B. a trendline<br> C. a title
Iteru [2.4K]

Answer:

Axis Labels

Explanation:

The axis labels are usually located on the x and y axis. This graph however is missing those.

hope this helps!

7 0
3 years ago
Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass?
pentagon [3]

Answer:

Henry Moseley

Explanation:

Dmitry Mendeleef and Lothar Meyer proposed a periodic table based on the atomic mass.

They stated a periodic law expressed as "chemical properties of elements are a periodic function of their atomic weights".

But, Henry Moseley in 1900s re-stated periodic law by changing the basis of the law from atomic weight to atomic number.

The present periodic law is stated as "the properties of elements are a periodic function of their atomic number".

6 0
2 years ago
Assuming an electron is a hydrogen atom can undergo any of the transitions below, thus changing its energy. Which transition is
inn [45]

Answer:

n = 3 to n = 5

Explanation:

According to the Bohr's model of the atom, electrons in an atom absorb energy to move from a lower to higher energy level.

We must note that as we progress away from the nucleus, the energy levels of electrons become closer together. The energy difference between successive levels decreases and the wavelength of light associated with such transitions become longer.

Hence,the absorption of light of the longest wavelength corresponds to n = 3 to n = 5

.

5 0
3 years ago
If I have 12.0 volume of gas at pressure of 1.10 and temperature of 200k, what is the number of moles? (R=8314)
arsen [322]

Answer:

7.94 x 10^6 mol

Explanation:

PV=nRT

n=(PV)/(RT)

n=(1.10*12.0)/(8314*200)

n=7.94 x 10^6 mol

5 0
3 years ago
What are the 4 variables that describe a gas
Phantasy [73]
Pressure, volume, temperature, # moles Pressure, volume and temperature, and moles of gas


Hope that helps!!!!
8 0
3 years ago
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