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miss Akunina [59]
3 years ago
10

What does a group mean in periodic table?

Chemistry
2 answers:
Stella [2.4K]3 years ago
8 0

Answer:Group, in chemistry, a column in the periodic table of the chemical elements. In a group, the chemical elements have atoms with identical valence electron counts and identical valence vacancy counts. ... Groups are numbered from 1 to 18.

Explanation:Hope this helped u may i also get brainlist plz only if u wanna give me brainlist though have an great day!

Tpy6a [65]3 years ago
5 0

Answer:

A group is a coulm with elements that share the same number of electons

Explanation:

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A gas has a volume of 420 L at a temperature of -42.0 degrees celsius. What volume will the gas occupy at 18.0 degrees celsius?
Hoochie [10]

Formula

V/T = V1/T1

Givens

V = 430 L

T = - 42 °C = - 42 + 273 = 231°K

V1 = ??

T1 = 18°C + 273 = 291°K

The pressure is a constant.

Solution

420/231 = V1/291         Multiply by 291

420*291 / 231 = V1

V1 = 122220 / 231

V1 = 521.1 L  

6 0
4 years ago
The following data are obtained for the decomposition of N2O5 at a certain temperature: 2N2O5(g) ↔ 4NO2(g) + O2(g) Time(s) 0 200
cricket20 [7]

Answer:

K = 0.0003 s⁻¹

Explanation:

The reaction is

2N₂O₅ = 4NO₂ + O₂

The equilibrium is

K[N_{2} O_{5} ]=-\frac{1}{2} \frac{d[N_{2} O_{5} ]}{dt} \\\int\limits^y_x {d[N_{2} O_{5} ]}{} \, =-2k\int\limits^t_0 {dt} \,\\ln[N_{2} O_{5} ]=-2kt+ln[N_{2} O_{5} ]

a plot is attached

From the plot, the slope is -0.0006

-2 * K = -0.0006

K = 0.0003 s⁻¹

Download xlsx
6 0
3 years ago
A 291 kg motorcycle moves with a velocity of 7 m/s. What is its kinetic energy? Joules
Elenna [48]
Kinetic energy=1/2*mass*velocity²
=1/2*291*49
=7129.5 Joules
3 0
3 years ago
What is the difference between bulk and particle scale? <br> Someone please help!!
sesenic [268]

Answer:

Particle density is the volumetric mass of the solid soil. It differs from bulk density because the volume used does not include pore spaces. Particle density represents the average density of all the minerals composing the soil.

Hope that helps

7 0
3 years ago
What type of reaction is represented by the following chemical equation?
Ivan
Combustion! CH4, which is methane, reacts with oxygen to form carbon dioxide. (For future reference, if a compound is reacted with ONLY oxygen it is sure to be a combustion reaction)
5 0
3 years ago
Read 3 more answers
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