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aleksandrvk [35]
2 years ago
13

How many atoms are in 13.0 g Sr

Chemistry
1 answer:
Mkey [24]2 years ago
6 0

Answer: 7.505

×

10

22

atoms. (rounded to third place of decimal)

Explanation:

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A displacement reaction takes place when calcium is placed in a solution of zinc chloride. Which substances will most likely be
Karolina [17]

Hi!


The correct option would be A.


This is because the displacement reaction would take place as follows

Ca + ZnCl2 --> CaCl2 + Zn


A displacement reaction is one in which a substitution occurs, as the more reactive element in the mixture replaces one that is less reactive.

In the electrochemical series, we find Ca higher than Zn, which is indicative of Ca being more reactive, and having the capacity to displace Zn to form a compound.


Option D would be incorrect as no such substitution occurs.

Option B would be incorrect because again, there is no substitution occurring, and also because two metals alone (Ca and Zn in our case) can never react to form a compound.

Option C would be incorrect because it is not possible because CaCl and ZnCl are forms that are too unstable to exist due to an overall positive charge.


Hope this helps!

5 0
3 years ago
W + BgCz2 --&gt; WCz + Bg<br> Balance this equation
yanalaym [24]

Answer: W + BgCz2 arrow WCz + Bg

2 W + BgCz2 arrow  2 WCz + Bg

Explanation:

Cz has 2 so you balcne the other side of WCz.

Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.

3 0
2 years ago
2000 joules are required to heat 125 grams of an unknown substance from 10 c to 28 c. What is the specific heat of the substance
Delicious77 [7]
Hello! Specific heat is the amount of energy required by known amount of substance to raise its temperature by one degree celsius. In our question it is given that 2000J energy when supplied to 125 g of unknown substance raised its temperature by 18 oC. So, The specific heat is calculated as follow;

3 0
3 years ago
There are two beakers that contain the same liquid substance at the same temperature. The larger beaker is 1,000ml and the small
azamat

Answer:

Answer choice B

Explanation:

Since you do not know the volume of the liquid in each beaker, the one in the smaller beaker could have more substance and therefore more thermal energy. If they had the same amount of substance, then the more voluminous one would radiate faster. However, since you do not know this, there is no way to tell. PM me if you have more questions. Hope this helps!

6 0
3 years ago
If you are using a thermometer you are measuring the
Slav-nsk [51]
Temperature of somewhere.
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2 years ago
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