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Maurinko [17]
3 years ago
8

In lab you are allowed to eat and drink only:

Chemistry
2 answers:
pav-90 [236]3 years ago
6 0
D- None of the above
RUDIKE [14]3 years ago
3 0
You should never eat or drink in a lab. You could get sick by digesting harmful chemicals. So the answer is D) none of the above. 
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1. How much magnesium oxide is produced if 12.1 g of magnesium reacts with 16 g of oxygen
melamori03 [73]

Answer:

20.2g (3 s.f.)

Explanation:

Please see attached picture for full solution.

8 0
3 years ago
How many moles are present in 45.0 g of lithium oxide (Li2O)?
BigorU [14]
Molar mass Li2O = 7.0 x 2 + 16 => 30 g/mol

1 mole Li2O ---------- 30 g
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moles Li2O = 45.0 x 1 / 30

moles Li2O = 45.0 / 30

= 1.50 moles of Li2O 

hope this helps!


4 0
3 years ago
Which element would be the most conductive and
Masja [62]
Malleability described the property of physical deformation under some compressive stress; a malleable material could, for example, be hammered into thin sheets. Malleability is generally a property of metallic elements: The atoms of elemental metals in the solid state are held together by a sea of indistinguishable, delocalized electrons. This also partially accounts for the generally high electrical and thermal conductivity of metals.

In any case, only one of the elements listed here is a metal, and that’s copper. Moreover, the other elements (hydrogen, neon, and nitrogen) are gases under standard conditions, and so their malleability wouldn’t even be a sensible consideration.
8 0
3 years ago
Read 2 more answers
How much of a 120g sample will remain after 300 years
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6 0
3 years ago
Treatment of gamma-pyran with the hydride (h-) acceptor triphenylmethyl perchlorate gives triphenylmethane and the perchlorate s
Mazyrski [523]
I have provided two images to help with this question. The first image is the reaction that is taking place. The γ-pyran is treated with the hydride acceptor triphenylmethyl perchlorate. A hydride is a hydrogen atom containing a lone pair of electrons giving it a negative charge. The triphenylmethyl cation is a positively charged carbocation that greatly wants to accept an electron pair to stabilize its charge. Therefore, it abstracts a hydride from the γ-puran starting material. It grabs one of the hydrogen atoms that is drawn in the reaction scheme. This results in the formation of triphenylmethane and a pyrylium perchlorate salt with the formula C₅H₅ClO₅. The important aspect of the structure is shown in the attached images. The most stable resonance form of the pyrylium cation is shown with a positive charge on the oxygen.

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6 0
4 years ago
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