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Len [333]
3 years ago
7

When scientists look at these examples, what do they know about the atoms? Carbon-12 Carbon-14

Chemistry
1 answer:
lorasvet [3.4K]3 years ago
3 0
Carbon-12 and Carbon-14 are isotopes of Carbon. Although they have the same number of protons, the <span>number of neutrons in each atom is not the same~</span>
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What is the value of 200c on a Kelvin scale
salantis [7]

Answer:

473.15

Explanation:

You can convert between Celsius and Kelvin like this: Kelvin = Celsius + 273.15. Often, the value of 273 is used instead of 273.15.

6 0
2 years ago
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Energy is added in the form of heat to a pot of water on the stove. This causes the water to
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The energy would increase

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2 years ago
. How many grams of magnesium chloride can be produced by reacting 2 moles of chlorine gas with excess magnesium bromide? ____Cl
dlinn [17]

Answer: 190 g of magnesium chloride can be produced by reacting 2 moles of chlorine gas with excess magnesium bromide.

Explanation:

The balanced chemical reaction is;

Cl_2+MgBr_2\rightarrow MgCl_2+Br_2

Cl_2 is the limiting reagent as it limits the formation of product and MgBr_2 is the excess reagent.

According to stoichiometry :

1 mole of Cl_2 produces = 1 mole of MgCl_2

Thus 2 moles of Cl_2 will produce=\frac{1}{1}\times 2=2moles  of MgCl_2

 Mass of MgCl_2=moles\times {\text {Molar mass}}=2moles\times 95g/mol=190g

Thus 190 g of magnesium chloride can be produced by reacting 2 moles of chlorine gas with excess magnesium bromide

5 0
2 years ago
An aqueous solution that is 20.0 percent sulfuric acid (h2so4) by mass has a density of 1.105 g/ml. determine the molarity of th
GuDViN [60]

The definition of molarity is:

Molarity = moles of solute / total volume of solution in Liters

In this case, our solute is Sulfuric Acid. To solve this problem, let us assume a basis for calculation.

Let us say that,

Total mass of solution = 100 g

Therefore mass of H2SO4 = 20 g

<span>The molar mass of H2SO4 = 98.079 g / mol</span>

 

Calculating for number of moles of H2SO4:

number of moles = <span>20 g / (98.079 g / mol)</span>

number of moles = 0.204 mol

 

Calculating for the volume of solution using the density:

<span>total volume of solution = 100 g / (1.105 g / mL)</span>

<span>total volume of solution = 90.50 mL = 0.0905 L</span>

 

Therefore the molarity is:

Molarity = 0.204 mol / 0.0905 L

Molarity = 2.2542 mol / L

<span>Molarity = 2.25 M</span>

3 0
3 years ago
CH4 is the ___________________ formula for methane.
Llana [10]
CH4 is the molecular formula for methane.
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3 years ago
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