3 years ago

Which model of the Adam was modeled after the solar system

1 answer:

5 0

. After Rutherford's model was published, a Danish scientist named Niels Bohr became interesting in the orbits of the electrons. He was inspired by thinking of atoms as tiny Solar Systems, where the elect

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In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) 2 NaBr(aq) PbBr2(s) 2 NaNO3(aq)

lyudmila [28]

Answer : The mass of $NaBr$ is, 295.323 grams

Solution :

First we have to calculate the moles of $NaNO_3$ .

$\text{Moles of }NaNO_3=\frac{\text{Mass of }NaNO_3}{\text{Molar mass of }NaNO_3}=\frac{244g}{85g/mole}=2.87moles$

Now we have to calculate the moles of NaBr.

The balanced chemical reaction is,

$Pb(NO_3)_2(aq)+2NaBr(aq)\rightarrow PbBr_2(s)+2NaNO_3(aq)$

From the balanced reaction we conclude that

As, 2 moles of $NaNO_3$ react with 2 moles of $NaBr$

So, 2.87 moles of $NaNO_3$ react with 2.87 moles of $NaBr$

Now we have to calculate the mass of NaBr.

$\text{Mass of }NaBr=\text{Moles of }NaBr\times \text{Molar mass of }NaBr$

$\text{Mass of }NaBr=(2.87mole)\times (102.9g/mole)=295.323g$

Therefore, the mass mass of $NaBr$ is, 295.323 grams

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2 years ago

Find the value of 6 +<br>6 +<br>6 + 16 + vo

AVprozaik [17]

Answer:

Explanation:

the value is 6 because its an even number

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2 years ago

when you put a book on a table the table pushes on the book is that newton's 1st,2nd,or 3rd law of motion ?

ohaa [14]

The table pushes the book and the book pushes the table
It's 3rd law

8 0

2 years ago

5. Which of the following elements will have a charge of 4+ or 4- as an ion?

hjlf

Answer:

The answer would either be Carbon or Silicon.

Explanation:

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2 years ago

What is condensation ?

fomenos

Answer:

gvapor or gas to liquid

Explanation:

water which collects as droplets on cold surface when humid air is in contact with it

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3 years ago

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