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KiRa [710]
3 years ago
13

Help!!! I need the answer for "explain how using the periodic table can help answer this question"

Chemistry
1 answer:
Tanzania [10]3 years ago
3 0
Well a compound is 2 or more different molecules together. So if you see a periodic table you will see the elements to see if they are the same or not.
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Write a message to Eric Wu explaining when he can photograph a lunar eclipse and why lunar eclipses happen.
AlekseyPX

A lunar eclipse can be photographed sometimes when Earth is in between the sun and the Moon.

<h3>Why lunar eclipse occur?</h3>

A lunar eclipse occurs when the Sun, Earth, and Moon align in the same line in which the Moon passes into Earth's shadow. In a total lunar eclipse, the entire Moon falls within the darkest part of Earth's shadow, called the umbra so we can conclude that claim 2  is the right answer about lunar eclipse.

Learn more about eclipse here: brainly.com/question/1077760

6 0
2 years ago
How many moles of H2 can be made from complete reaction of 3.0 moles of Al?
tresset_1 [31]

Answer: 4.5 moles of H_{2} can be made from complete reaction of 3.0 moles of Al.

Explanation:

The given reaction equation is as follows.

2Al + 6HCl \rightarrow 2AlCl_{3} + 3H_{2}

This shows that 2 moles of Al reacts with 6 moles of HCl. So, the amount of HCl required to react with 1 mole Al is three times the amount of HCl.

Therefore, 3 moles of Al will react with 9 moles of HCl to give 3 moles of AlCl_{3} and \frac{9}{2} moles of H_{2}.

The reaction equation now will be as follows.

3Al + 9HCl \rightarrow 3AlCl_{3} + \frac{9}{2}H_{2}

The moles \frac{9}{2} can also be written as 4.5 moles.

Thus, we can conclude that 4.5 moles of H_{2} can be made from complete reaction of 3.0 moles of Al.

6 0
3 years ago
How many significant figures does 602.060 have. what is its precision
ryzh [129]

That number has 6 significant numbers. It's precision would be 602.

Hope it helped.  

4 0
3 years ago
Is this equation balanced or unbalanced?<br> C+02=CO2
LenKa [72]
This equation is balanced
4 0
3 years ago
What ion charge patterns are in the periodic table
Rzqust [24]
<span>the elements in groups1a, 2a, 3a have positive charges according to their group numbers</span>
8 0
4 years ago
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