3 years ago

What can you predict about an element from its position in the periodic table?

1 answer:

8 0

Yeah of-course!! It's valency by group most of the chemical property like electronegativity, ionization energy etc. by the combination of groups and periods...

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Complete the table by classifying each property as either a physical or chemical property

Advocard [28]

Where is the table? I dont know what to classify

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3 years ago

How many grams of NaNO3 in 165 grams of H2O at 20°C would fully dissolve?

Fantom [35]

Answer: birchbox

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3 years ago

How much time would it take to distribute one avagadro's number of wheat grains if 10^10 grains are A)1.9*10^2 years B)1.9*10^10

Makovka662 [10]

Answer:

It takes 1.9 $\times 10^{6}$ years to distribute all the grains.

Explanation:

In one second, $10^{10}$ grains of wheat are distributed.

We are supposed to find the time it would take to Distribute Avogadro number of grains.

1 avogadro number = 6.022 $\times 10^{23}$

Number of grains distributed in 1 day = 86400 $\times 10^{10}$

= 8.64 $\times 10^{14}$

Number of grains distributed in 1 year= 8.64 $\times 10^{14} \times 365$

= 3.1536 $\times 10^{17}$

Time taken = $\frac{Number of grains to be distributed}{grains distributed in 1 year}$

= $\frac {6.022 \times 10^{23}}{3.1536\times 10^{17}}$

= 1.9 $\times 10^{6}$

7 0

3 years ago

Someone help me out with these chemistry (stoichiometry)

lana66690 [7]

Answer:Videos

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3 years ago

Write the net ionic equation for the precipitation of calcium sulfide from aqueous solution

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Answer:

Answer is Ca2+(aq)+S2-(aq)=>CaS(s)

Explanation:

I hope it's helpful!

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3 years ago