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4 years ago

It’s is the same one from my recent ones

Chemistry

1 answer:

UkoKoshka [18]4 years ago

5 0

<h2>9. Given : P + O2 = P2O5</h2>

Balanced Chemical Equation: 4P + 5O2 = 2P2O5

Reactant Product

P = (1) 4 | P = (2) 4

O = (2) 10 | O = (5) 10

Reaction Information

Phosphorus + Dioxygen = Phosphorus Pentoxide

Reaction Type: Synthesis

<h2>10. Given: HCl + NaOH = NaCl + H2O </h2>

Reactant Product

H = 2 | H = 2

Cl = 1 | Cl = 1

Na = 1 | Na = 1

O = 1 | O = 1

<h3>Chemical Equation is already in balance.</h3>

Reaction Information: Hydrogen Chloride + Sodium Hydroxide = Sodium Chloride + Water

Reaction Type : Double Displacement (Acid-Base)

How to balance chemical equation?

brainly.com/question/15939935

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A syringe containing 1.63 mL of oxygen gas is cooled from 91.0 ∘C to 0.9 ∘C. What is the final volume Vf of oxygen gas? (Assume

Archy [21]

Answer:

Vf = 1.22 mL

Explanation:

If we assume that the pressure is constant and the number of moles does not change, we can say that the volume of the gas is modified in a directly ratio, to the Absolute Temperature.

Let's convert the values:

91°C + 273 = 364K

0.9°C + 273 = 273.9K

Volume decreases if the temperature is decreases

Volume increases if the T° increases

V₁ / T₁ = V₂ / T₂ → 1.63mL /364K = V₂ / 273.9K

V₂ = (1.63mL /364K) . 273.9K → 1.22 mL

5 0

4 years ago

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Fungi have eukaryotic cells (large cells with a nucleus), like animals and plants True or false?

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True your answer is true

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3 years ago

Calculate the wavelength for the transition from n = 4 to n = 2, and state the name given to the spectroscopic series to which t

finlep [7]

Answer:

The wavelength for the transition from n = 4 to n = 2 is 486nm and the name name given to the spectroscopic series belongs to The Balmer series.

Explanation

lets calculate -

Rydberg equation- $\frac{1}{\pi } =R(\frac{1}{n_1^2} -\frac{1}{n_2^2})$

where , $\pi$ is wavelength , R is Rydberg constant ( $1.097\times10^7$ ), $n_1$ and $n_2$ are the quantum numbers of the energy levels. (where $n_1=2 , n_2=4$ )