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serious [3.7K]
2 years ago
7

Using the periodic table, elaborate the difference between the number of electrons in an oxygen-16 atom and an oxygen-18 atom.

Chemistry
2 answers:
tensa zangetsu [6.8K]2 years ago
6 0

Answer:

the answer is d because the The number of electrons are the same for all isotopes of an element. Hope this helped :)

Explanation:

Butoxors [25]2 years ago
5 0
The correct answer here is D
Have a nice day :)
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15.630 g milk chocolate bar ks found to contain 9.815g of sugar. how many milligrams of sugar does the bar contain?
sleet_krkn [62]
Well there are 1,000 milligrams in 1 gram so 9.815 grams of sugar is equivalent to 9,815 milligrams of sugar. So a bar of milk chocolate contains 9,815 milligrams of sugar.
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An irregularly shaped stone was lowered into a gradulated cylinder holding a volume of water equal to 12mL.the height of the wat
denis23 [38]
The density of the stone is 5 because the formula is mass/volume and the volume is 5 and the mass is 25
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2 years ago
Convert 213.62 grams of xenon gas at STP to L.
jolli1 [7]

Answer: The coefficient is 3.645

The exponent is 1

There are 4 significant digits

The rightmost significant figure is 5

Explanation:

Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example : 5000 is written as 5.0\times 10^3

According to avogadro's law, 1 mole of every gas contains avogadro's number 6.023\times 10^{23} of particles, occupy 22.4 L at STP and weighs equal to its molecular mass.

131.29 g of Xe occupy = 22.4 L at STP.

Thus 213.62 g of Xe occupy = \frac{22.4}{131.29}\times 213.62=36.45L at STP.

Scientific notation = 3.645\times 10^1L

The coefficient is 3.645

The exponent is 1

There are 4 significant digits

The rightmost significant figure is 5

4 0
2 years ago
Bisphenol-A (BPA) is a compound found in many plastics. Under certain circumstances, BPA leaches out of the plastic and is inges
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BPA is estrogenic and an endocrine disruptor.
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(chem) which is more concentrated: 45.0 grams of HCOOH dissolved in 189 mL of water or 1.5 moles of CH↓2COOH dissolved in twice
Liula [17]

Answer:

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Explanation:

The higher the concentration value, the more concentrated it is.

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Concentration = No of moles / Volume

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Number of moles = Mass / Molar mass = 5 / 46.03 = 0.1086 mol

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Volume = 2 * 189 = 378 ml = 0.378 L

Concentration = 1.5 / 0.378 = 3.9683 mol/L

Comparing both concentration values;

CH3COOH would be more concentrated

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