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vredina [299]
3 years ago
15

How many atoms are contained in 1 mole of silver

Chemistry
2 answers:
Novosadov [1.4K]3 years ago
7 0
3 atoms are contained in 1 mole of silver
Bumek [7]3 years ago
6 0
3 atoms! Glad I can help! :)
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What would the percentage of thorium-232 (parent compound) be in a rock that was dated at 2.8 billions years?
just olya [345]

The half-life of Th-232 is 1.405 × 10¹⁰ years  

Time elapsed = 2.8 x 10⁹ years  

Equation of radioactive decay:

A = A₀ = (1/2)^ t/t₁/₂

where A₀ is the initial amount, A is the amount after time t, t₁/₂ is the half file

The fraction of thorium-232 that remains in the rock after 2.8 billions years is,

A/A₀ = (1/2) ^ (2.8 x 10⁹/ 1.405 × 10¹⁰) = 0.871

Therefore, the percentage of thorium-232 in the rock that was dated at 2.8 billions year = 87.1%


5 0
3 years ago
The property of water in which it attaches to another surface is known as: *
Vesnalui [34]

Answer:

The property of water which makes it to attach or stick to another surface is Adhesion.

Explanation:

Adhesion is the characteristic ability a substance possess to stick to other substances. This is as a result of the covalent bond existing between the two hydrogen atoms and the one oxygen atom in the water molecule.

An example of the property of Adhesion is a water drop that stuck to the end of the pine needles

5 0
3 years ago
30 POINTS!!!!Now calculate the specific gravity of the rose quartz. The procedure is as follows: Remember, the density of water
grin007 [14]
Density--<span>1.0g/cm3
Gravity-- </span><span>2.65g/cm3

</span>
7 0
3 years ago
Calculate the mass of ZnCl2 produced by the reaction of 49.8 grams of H2. Zn + 2HCl ZnCl2 + H2
tester [92]

Answer:

3300.85 g

Explanation:

Given data:

Mass of ZnCl₂ produced = ?

Mass of H₂ produced = 49.8 g

Solution:

Chemical equation:

Zn + 2HCl     →    ZnCl₂ + H₂

Number of moles of  H₂:

Number of moles = mass/molar mass

Number  of moles = 49.8 g/ 2.056 g/mol

Number  of moles = 24.22 mol

Now we will compare the moles of H₂ with ZnCl₂ form balance chemical equation.

                         H₂              :              ZnCl₂

                          1                :                   1

                        24.22         :              24.22

Mass of ZnCl₂:

Mass = number of moles × molar mass

Mass =  24.22 × 136.286 g/mol

Mass = 3300.85 g

6 0
3 years ago
How does Controlled fires help prevent real forest fires?
Salsk061 [2.6K]

Answer:

it burns things which would be burned easily by lightning, and then people put the fire out immediately.  If the dried plants that they are lighting on fire are hit by lightning, it can lead to a massive fire without anyone realizing.  

6 0
3 years ago
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