Count the total number of atoms in sio2:

1 answer:

8 0

Atoms are the basic units of matter and the defining structure of elements. We count the number of atoms by the total number of elements present in the compound. In this case, we have 1 atom of Si and 2 atoms of oxygen which would have 3 total number of atoms.

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How many particles are there in 3 moles of Ag?

lutik1710 [3]

Answer:

6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules

Explanation:

6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules

4 0

1 year ago

A sample of tap water contains 1.95 x 10^3 ppm caco3. assuming the density of the tap water is 1.00 g/ml, calculate the mass of

Pavlova-9 [17]

3.9 grams CaCO3
The mass of 2.0 L of water with a density of 1.00 g/ml is 2000 grams.And 1 ppm of that is 2000 / 1000000 = 0.002 grams. So just multiply by the ppm of CaCO3, giving 0.002 g * 1.95x10^3 = 3.90 grams.
Since the least accurate datum we have is 2 significant figures, the result should be rounded to 2 significant figures, giving 3.9 grams.

7 0

3 years ago

How could an alpha particle pass straight through the metal foil and strike the center of the phosphor screen on the other side

djverab [1.8K]

I think you refer to Rutherford's Gold Foil Experiment alpha particles pass through because of the enormous amount of empty space inside the atom.

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to have its trajectory affected the alpha particle has to pass "near" the nucleus to interact with the positive charge of the nucleus.
the fact is that internally the gold atoms are basically empty space and the nucleus represents only a small portion of the entire volume. only few alpha particles pass near the nucleus

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-gio-chealafi- hope this helps you, have a nice rest of the day. ily all!!