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insens350 [35]
3 years ago
12

Why is it important for scientists to study other planets?

Chemistry
1 answer:
gregori [183]3 years ago
6 0
To help them discover new constructive forces on earth
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the water in a tea pot is heated on a stove top. The temperature of the water increases. Is this an endothermic or exothermic pr
marusya05 [52]
It is an endothermic process
5 0
3 years ago
What is the second quantum number of the 3p1 electron in aluminum 1s22s22p63s23p1?
Brut [27]
There are 4 quantum numbers that can be used to describe the space of highest probability an electron resides in.
First quantum number is the principal quantum number- n , states the energy level.
Second quantum number states the angular momentum quantum number - l,
states the subshell and the shape of the orbital
values of l for n energy shells are from 0 to n-1
third is magnetic quantum number - m, which tells the specific orbital.
fourth is spin quantum number - s - gives the spin of the electron in the orbital

here we are asked to find l for 3p1
n = 3
and values of l are 0,1 and 2
for p orbitals , l = 1
therefore second orbital for 3p¹ is 1.

5 0
3 years ago
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Calculate the percent of composition of oxygen in Mercury (ll) oxide HgO
bekas [8.4K]
Add up the molar mass of Mercury Oxide, and then divide the molar mass of Oxygen by the molar mass of the compound.

So...

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16g/217g = .0737... x 100 = 7.37%
6 0
3 years ago
40.0L of N₂ gas are in a sealed container at STP.How many moles of N₂ are present?9 mol
Vinvika [58]

Explanation:

We have to find the number of moles of N₂ that are present in a sample that has a volume of 40.0 L at STP.

STP means Standard Conditions of Temperature and Pressure. These conditions are 273.15 K and 1 atm. We know that 1 mol of N₂ will occupy 22.4 L. We can use that ratio to find the answer to our problem.

1 mol of N₂ = 22.4 L

moles of N₂ = 40.0 L * 1 mol/(22.4 L)

moles of N₂ = 1.79 mol

Answer: 1.79 moles of nitrogen are present.

8 0
1 year ago
What type of change is the following: striking a match chemical, or physical?
chubhunter [2.5K]
Chemical,when you light a match stick, you are starting a chain reaction of the substance chemical formula, making it a chemical change
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4 years ago
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