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tigry1 [53]
4 years ago
11

(PLS HELP will mark brainliest!) Compare and contrast the alkali metals and the alkaline earth metals. Discuss their physical an

d chemical properties, their magnetic properties, and their electron configurations.
Chemistry
1 answer:
sweet [91]4 years ago
7 0
Alkali metals are the elements in group 1 of the periodic table. Alkaline earth metals are the elements in group 2 of the periodic table. ... The main difference between alkaline and alkali is that alkali metals have one valence electron, whereas alkaline earth metals have two valence electrons.

Hope this helps:)
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Convert the following to grams<br> 0.500 moles of (NH4)2CO3
steposvetlana [31]
Molar mass (NH₄)₂CO₃ = <span>96.09 g/mol

1 mole ---------> 96.09 g
0.500 moles ----> ?

0.500 * 96.09 = 48.045 g of </span><span>(NH₄)₂CO₃

hope this helps!

</span>
5 0
3 years ago
For the balanced equation shown below, how many moles of o2 will react with 0.3020 moles of co2? 2c2h5oh + 6o2 → 4co2 + 6h2o que
MariettaO [177]
The balanced reaction for combustion is as follows ;
2C₂H₅OH + 6O₂ ---> 4CO₂ + 6H₂O
the stoichiometry of C₂H₅OH to O₂ is 2:6
that means 2 mol of C₂H₅OH reacts with 6 mol of O₂.
when 1 mol of C₂H₅OH reacts with 6/2 mol of O₂,
then 0.3020 mol of C₂H₅OH reacts with - 6/2 x 0.3020
therefore number of O₂ moles reacted = 0.91 mol
6 0
3 years ago
Read 2 more answers
A 5.5 g sample of a substance contains only carbon and oxygen. Carbon makes up 35% of the mass of the substance. The rest is mad
Umnica [9.8K]

We have been given the condition that carbon makes up 35% of the mass of the substance and the rest is made up of oxygen. With this, it can be concluded that 65% of the substance is made up of oxygen. If we let x be the mass of oxygen in the substance, the operation that would best represent the scenario is,

<span>                                       x = (0.65)(5.5 g)</span>

<span>                                       <em> </em><span><em>x = 3.575 g</em></span></span>

8 0
3 years ago
I don’t understand how to do this
djverab [1.8K]
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For the others, they are hydrocarbons.
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7 0
4 years ago
What are weather balloons? (3 points)
WARRIOR [948]
C! objects that carry instruments into the stratosphere to measure atmospheric conditions
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3 years ago
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