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Delicious77 [7]
3 years ago
12

Carbon dioxide has ______ bonds.

Chemistry
2 answers:
Vsevolod [243]3 years ago
7 0

Answer: none of the above

Explanation:  Note that carbon dioxide has two covalent bonds between each oxygen atom and the carbon atom, which is shown here as two lines and referred to as a double bond. When molecules are symmetrical, however, the atoms pull equally on the electrons and the charge distribution is uniform.

jeyben [28]3 years ago
5 0

Answer:

1or 3

Explanation:

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xxMikexx [17]

Answer:green

Explanation:blue and yellow make green

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Are viruses alive. What makes something alive?
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The correct answer is the last question
8 0
3 years ago
If 2.5 grams of calcium bromide reacted with excess lithium oxide, how many grams of bromide product would be formed?
Ede4ka [16]

Answer: 2.17 g of  bromide product would be formed

Explanation:

The reaction of calcium bromide with lithium oxide will be:

CaBr_2+Li_2O\rightarrow 2LiBr+CaO

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of calcium bromide}=\frac{2.5g}{199.9g/mol}=0.0125moles

As lithium oxide is in excess, calcium bromide is the limiting reagent.

According to stoichiometry :

1 mole of CaBr_2 produce = 2 moles of LiBr

Thus 0.0125 moles of CaBr_2 will require=\frac{2}{1}\times 0.0125=0.025moles  of NH_3

Mass of LiBr=moles\times {\text {Molar mass}}=0.025moles\times 86.8g/mol=2.17g

Thus 2.17 g of  bromide product would be formed

3 0
3 years ago
Why concentrated HNO3 is 69% by mass of nitric acid? Please explain what it means.
Lyrx [107]

Answer:

See the answer below

Explanation:

<u>The percentage by mass of a substance in a mixture is the ratio of the mass of the substance and the mass of the entire mixture.</u>

<em>Hence, when concentrated HNO3 is said to be 69% by mass of nitric acid, it means that the solution of the acid has 69% HNO3 and 31% water in terms of mass. More specifically, 100 g of the solution of the acid would contain 69 g of HNO3 and 31 g of water respectively,</em>

7 0
3 years ago
Be sure to answer all parts. Enter your answers in scientific notation.
Andrews [41]

Answer:

a) f = 3.02x10¹⁵ s⁻¹, and λ = 99.4 nm.

b) 99.4 nm

Explanation:

a) The energy of radiation is given by:

E = h*f

Where h is the Planck constant (6.626x10⁻³⁴ J.s), and f is the frequency. To have the highest frequency, the energy must be the highest too, because they're directly proportional. So we must use E = -E1 = 20x10⁻¹⁹ J

20x10⁻¹⁹ = 6.626x10⁻³⁴xf

f = 3.02x10¹⁵ s⁻¹

The wavelenght is the velocity of light (3.00x10⁸ m/s) divided by the frequency:

λ = 3.00x10⁸/3.02x10¹⁵

λ = 9.94x10⁻⁸ m = 99.4 nm

b) To have the shortest wavelength, it must be the highest energy and frequency, so it would be the same as the letter a) 99.4 nm.

8 0
3 years ago
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