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LenaWriter [7]
3 years ago
10

PLS!! I really need help since I don´t understand this

Chemistry
2 answers:
Juli2301 [7.4K]3 years ago
8 0

Answer:

use the periodic table

Explanation:

MAVERICK [17]3 years ago
5 0

Here is a photo of the periodic table! This photograph might help you with what you're in need of.  If you still don't know, just comment and I'll try my best to help!

            <em>Hope this is a little helpful!</em>

<em>       ~Hocus Pocus</em>  

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2CO (g) + O2 (g) → CO2 (g)<br><br> How many grams of O2 are needed to react with 6.64 L of CO2?
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3 years ago
In a crystal lattice of an ionic compound,
Lena [83]

Answer:

i would try B

Explanation:

6 0
3 years ago
Which of the following environments is most likely to have days with a relative humidity of less than 10% (ten percent)?
Anon25 [30]

Answer:

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6 0
3 years ago
What volume (in milliliters) of oxygen gas is required to react with 4.03 g of Mg at STP?
BigorU [14]
Mg reaction with O₂ gas will produce MgO so the equation will be
2Mg+O₂⇒2MgO. (You have to find the equation in order two figure out the number of moles of O₂ that will react with 1 mole of MgO).

The first step is to find the number of moles of Mg in 4.03g of Mg.  You can do this by dividing 4.03g Mg by its molar mass (which is 24.3g/mol) to get 0.1658mol Mg.  Then you have to find the number of moles of O₂ that will react with 0.1658mol Mg.  To do this you need to use the fact that 1mol O₂ will react with 2mol Mg (this reatio is from the chemical equation) so you have to multiply 0.1658mol Mg by (1mol O₂)/(2mol Mg) to get 0.0829mol O₂.  From here you would usually use PV=nRT and solve for V However, the question tells us that we are at STP, that means you can use the fact that 22.4L of gas is 1 mol of gas at STP.  Using that information we can find the volume of O₂ gas by mulitlying 0.0829mol O₂ by 22.4L/mol to get 1.857L which equals 1857mL.
therefore, 1857mL of O₂ gas will react with 4.03g of Mg.

I hope this helps. Let me know in the comments if anything is unclear.
6 0
3 years ago
Read 2 more answers
Based on its location on the periodic table, what group does Strontium belong to?
Gnom [1K]

Answer:

alkaline earth metals

Explanation:

8 0
3 years ago
Read 2 more answers
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