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otez555 [7]
3 years ago
7

In an equation what symbol would indicate a mixture

Chemistry
1 answer:
Lilit [14]3 years ago
5 0
<span>In an equation, the symbol that would indicate a mixture is c (aq). The meanings of the symbols are: (s) - solid, (l) - liquid, (g) gas, and (aq) - aqueous. Symbol (aq) means that something is dissolved in the water. It represents an aqueous solution. </span>
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Summary about helium
Zinaida [17]

Answer: Helium is an type of air that can be used to inflate balloons, balls,  and other things that require air. The carbon dioxide we breath out is similar to this helium.

Hope this helps!

6 0
3 years ago
Which is a HOMOGENEOUS mixture?a.) a bowl of fruit salad
hodyreva [135]

The answer C. Why because homogeneous is one thing not two. one of the same thing.

7 0
3 years ago
A rock contains 0.623 mg of 206Pb for every 1.000 mg of 238U present. Assuming that no lead was originally present, that all the
maxonik [38]

Answer:

t = 3,496x10⁹ years

Explanation:

The decay of ²³⁸U is:

²³⁸U → ²⁰⁶Pb + 8He + 6e⁻

Moles of ²⁰⁶Pb presents in 0,623mg are:

0,623x10⁻³g×(1mol / 206g) = 3,02x10⁻⁶ moles of ²⁰⁶Pb.

These moles are equals to moles of ²³⁸U before decay, that means, 3,02x10⁻⁶ moles²³⁸U

In grams:

3,02x10⁻⁶ moles²³⁸U× (238g / 1mol) = 7,20x10⁻⁴ g ²³⁸U = 0,720 mg²³⁸U

That means initial ²³⁸U was 1,000mg + 0,720mg =<em> 1,720mg</em>

Applying the formula:

ln (N₀/N) t₁₂ = t ln2

Where N₀ is initial amount of uranium (1,720mg), N is concentration of uranium (1,000mg),  half-life time is a constant (t₁₂= 4,468x10⁹ years) and t is the time transcurred for the reaction. Replacing:

ln(1,720/1)*4,468x10⁹ years = t ln2

<em>t = 3,496x10⁹ years</em>

<em></em>

I hope it helps!

6 0
2 years ago
An atom of nitrogen has several protons in its nucleus. How many electrons does it have
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It has 7 electrons, 7 protons and 7 neutrons
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3 years ago
What is the period and atomic number of the atom with atomic number 46​
UNO [17]

Answer:

Atomic number: 46

period : 5

4 0
2 years ago
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