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3 years ago

How many atoms are present in 3 moles of chromium?

Chemistry

1 answer:

Murljashka [212]3 years ago

3 0

Answer:

1.80 x 10^24 atoms

Explanation:

3moles × 6.022×10^23 atoms/mole

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PLEASE HELP ME!!! It would be great

kompoz [17]

The answer should be 0.5 because 6/12 is 0.5. It gives u the key equation

3 0

3 years ago

Gold has a density of 1,200 lb./ft. What is the density of gold in g/em? For conversion factors use I lb. 453.6 g, and l inch-2.

Jlenok [28]

<u>Answer:</u> The density of gold in $g/cm^3$ is $19.22g/cm^3$

<u>Explanation:</u>

Density is defined as the ratio of mass of the object and volume of the object. Mathematically,

$\text{Density}=\frac{\text{Mass of the object}}{\text{Volume of the object}}$

We are given:

Density of gold = $1200lb/ft^3$

Using conversion factors:

1 lb = 453.6 g

1 feet = 12 inches

1 inch = 2.54 cm

Converting given quantity into $g/cm^3$ , we get:

$\Rightarrow (\frac{1200lb}{ft^3})\times (\frac{453.6g}{1lb})\times (\frac{1ft}{12inch})^3\times (\frac{1inch}{2.54cm})^3\\\\\Rightarrow 19.22g/cm^3$

Hence, the density of gold in $g/cm^3$ is $19.22g/cm^3$

6 0

3 years ago

Vinegar, fruit juice and cola are examples of

andrew-mc [135]

Answer:

strong bases

Explanation:

7 0

3 years ago

I don’t get it plz help

d1i1m1o1n [39]

D=m/v. (Density equals mass over volume).
So in your case density = 4.2/6
Which equals 0.7
Your units will be grams over milliliters

So your answer is 0.7 g/ml

3 0

3 years ago

2 moles of sodium phosphate reacts with 3 moles of

miss Akunina [59]

Answer: 6 moles of NaCl are produced when 2 moles of sodium phosphate reacts with 3 moles of calcium chloride

Explanation:

The balanced chemical equation is:

$2Na_3PO_4+3CaCl_2\rightarrow 6NaCl+Ca_3(PO_4)_2$

According to stoichiometry :

2 moles of $Na_3PO_4$ require 3 moles of $CaCl_2$

Thus both are limiting reagent as both will limit the formation of product.

As 2 moles of $Na_3PO_4$ reacts with 3 moles of $CaCl_2$ give = 6 moles of $NaCl$

Thus 6 moles of NaCl are produced when 2 moles of sodium phosphate reacts with 3 moles of calcium chloride

4 0

3 years ago