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Alja [10]
3 years ago
8

The properties of the elements repeat in each

Chemistry
2 answers:
Alex Ar [27]3 years ago
5 0
They repeat in each row called a period
Ronch [10]3 years ago
4 0
The properties of the elements repeat in each group. Each vertical column on the periodic table represents a different group, except for the transition metals in the middle
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Stoichiometry: Calculate the moles of H2 produced by .042 g Mg in the equation Mg + 2HCl > MgCl2 + H2
Evgesh-ka [11]

Answer:

<em>Mg </em>(<em>s</em>) + 2<em>HCI2 </em>(<em>aq</em>) → <em>MgCI2 </em>(<em>aq</em>) + <em>H2 </em>(<em>g</em>)

I think this is the correct answer I not a 100% sure if it is correct.

Explanation:

Guessing

6 0
3 years ago
Help me please !! How to solve it ??
snow_tiger [21]
1st one= CaO +H2O=Ca(OH)2
product side-
Ca=1
O=2
H=2
Reactant side-
Ca=1
O=2
H=2
The first one is balanced for you 
There is 1 calcium on each side 2 oxygens on each side and 2 hydrogens on each side


6 0
3 years ago
What can you conclude from the fact that electrons orbit far away from atomic nuclei?
suter [353]
Electrons are extremely small. Atoms are comprised mostly of empty space. Protons have a positive charge.
Hope this helps.
5 0
3 years ago
Why can water be used in the cooling system of a car? A. it always heats the car in the winter B. it helps fluctuate temperature
JulsSmile [24]
The answer is C. It resists fast temperature change
8 0
3 years ago
Read 2 more answers
Element Y has two natural isotopes Y-63 (62.940 amu) and Y-65 (64.928 amu). Calculate the atomic mass of element Y, given the ab
djverab [1.8K]

Answer:

Average atomic mass = 63.553 amu.

Explanation:

Given data:

Abundance of Y-63 = 69.17%

Abundance of Y-65 = 100 - 69.17 = 30.83%

Atomic mass of Y-63 = 62.940 amu

Atomic mass of Y-65 = 64.928 amu

Atomic mass of Y = ?

Solution:

Average atomic mass= (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass= (62.940×69.17)+(64.928×30.83) /100

Average atomic mass =  4353.560 + 2001.730 / 100

Average atomic mass = 6355.29 / 100

Average atomic mass = 63.553 amu.

5 0
3 years ago
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