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Lyrx [107]
3 years ago
12

When electrons absorb energy they are able to

Chemistry
1 answer:
Alika [10]3 years ago
4 0

When electrons absorb energy they are able to <span>move from their ground states up to excited states. The answer is letter B. an example of this is when you light a match. The molecules of the matchstick are in its ground state. When you flick it on the ground or anything hard, it causes its molecules to move into the excited state and thus causing fire.</span>

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Why is the symbol for the element sulfur and the formula for a molecule of sulfur differ
lukranit [14]

Answer:

Sulfur (S) is an element while the formula for this element is not just sulfur (e.g. H2S, SO2)

Explanation:

5 0
3 years ago
Glucose (molar mass=180.16 g/mol) is a simple, soluble sugar. Glucose solutions are used to treat patients with low blood sugar.
trasher [3.6K]

Do you still need this answer?

8 0
4 years ago
Does the universe have air in it between the galxies in it
fenix001 [56]

Answer:

No it does not space does not have oxygen and air is caused by oxygen

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Explanation:

4 0
3 years ago
The densevapor iodinee heptafluoride reacts rapidly with water to give a mixture of periodic acid and hydrofluoric acid .
erma4kov [3.2K]

Explanation:

When iodine heptafluoride reacts rapidly with water to give a mixture of periodic acid and hydrofluoric acid. Reaction equation for the same is as follows.

       IF_{7} + 6H_{2}O \rightarrow H_{5}IO_{6} + 7HF

As it is given that there are 3.72 \times 10^{-2} moles of iodine heptafluoride are present. Molar mass of IF_{7} is 259.9 g/mol. Molar mass of HIO_{4} is 227.94 g/mol and molar mass of HF is 20.01 g/mol.

Now, according to the reaction equation 3.72 \times 10^{-2} M IF_{7} gives 3.72 \times 10^{-2} M H_{5}IO_{6}.

Also, the volume is given as 795 ml or 0.795 L (as 1 mL = 0.001 L).

Hence, calculate the concentration of H_{5}IO_{6} into the solution as follows.

              Concentration = \frac{\text{no. of moles}}{volume}

                                      = \frac{3.72 \times 10^{-2}}{0.795 L}

                                      = 4.7 \times 10^{-2} mol/L

or,                                   = 0.047 M

Now, as 1 mol of IF_{7} produces 7 mol HF. So, 7 \times 3.72 \times 10^{-2} = 26.04 \times 10^{-2} M HF.

Therefore, concentration of HF will be calculated as follows.

             Concentration of HF = \frac{0.2604}{0.795}

                                              = 0.33 M

Thus, we can conclude that concentration of periodic acid is 0.047 M and concentration of hydrofluoric acid is 0.33 M.    

8 0
3 years ago
Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
Naya [18.7K]

SI units or International System of Units is defined as basic set of measurement of seven units. The physical quantities and base units are as follows:

Length is measured in meter (m), mass in kilogram (kg), time in second (s), electric current in ampere (A), temperature in Kelvin (K),  luminous intensity in candela (cd) and amount of substance in mole (mol).

Therefore, SI units of physical quantities is known as base units and other units are known as derived units because they can derived from the SI units.

Thus, the correct match will be:

Mass\rightarrow kilogram

Temperature\rightarrow Kelvin

Time\rightarrow second

Electric current\rightarrow ampere

From the rest of the units, degree Fahrenheit is derived unit for temperature, gram is derived unit for mass, nanosecond is derived unit for time and candela is SI unit for luminous intensity.

5 0
3 years ago
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