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3 years ago

Carbon bums in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?

Physics

1 answer:

diamong [38]3 years ago

4 0

B. carbon + oxygen -- carbon dioxide

Explanation:

The best equation that describes a reaction where carbon combines by burning in the presence of oxygen to produce carbon dioxide is:

carbon + oxygen -- carbon dioxide

Every chemical reaction is made up of reactants and products

Reactants are the species on the left hand side of an equation, the products are those on the right hand side.

The reactants combines chemically to give produces.

The kind of reaction depicted above is a synthesis or combination reaction where two species combines to gives a product or more;

C + O₂ → CO₂

learn more:

Chemical reaction brainly.com/question/3953793

#learnwithBrainly

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Which of the following is the best example of kinetic energy? A book sitting on a bookshelf A golfer preparing to putt the ball

Phantasy [73]

sorry if im wrong but

D. A satellite orbiting the Earth.

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3 years ago

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Consider a box sitting in the back of a pickup. The pickup accelerates to the right, and because the bed of the pickup is sticky

andreyandreev [35.5K]

The force would be coming from the right causing the box the lean/ slide to left, if it wasnt sticky.

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4 years ago

When an excited electron falls from n = 3 to n = 2, a red radiation in the Balmer series emitted. What is the frequency of this

vichka [17]

Answer:

The frequency of this photon is $4.57\times10^{14}\ Hz$

(D) is correct option.

Explanation:

Given that,

Excited states,

$n=3$

$n=2$

We need to calculate the wavelength

Using formula for energy

$E=13.6(\dfrac{1}{n^2}-\dfrac{1}{m^2})$

$E=13.6(\dfrac{1}{4}-\dfrac{1}{9})$

$E=1.888\ eV$

$E=1.888\times1.6\times10^{-19}\ J$

$E=3.0208\times10^{-19}\ J$

We need to calculate the frequency

Using formula of frequency

$E=hf$

$f=\dfrac{E}{h}$

Where, E =energy

$f=\dfrac{3.0208\times10^{-19}}{6.63\times10^{-34}}$

$f=4.57\times10^{14}\ Hz$

Hence, The frequency of this photon is $4.57\times10^{14}\ Hz$

4 0

3 years ago

Path:p

Aleksandr [31]

Answer:

.1 A1 = a1 A1 is amount at .1 %

.01 A2 = a2 A2 is the amount at .01%

a1 + a2 = 454 total of a1 and a2

A = 454 / .03 = 15133.33 tot amount needed

454 = .1 A1 + .01 A2

A2 = 15133.33 - A1

454 = .1 A1 + .01 (15133.33 - A1)

454 = .09 A1 + 151.33

A1 = 302.67 / .09 = 3363

A2 = 15133.3 - 3363 = 11770.3

Check:

.1 * A1 = 336.3

.01 * A2 = 117.7

total = 336.3 + 117.7 = 454

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3 years ago

A battery having an emf of 9.76 V delivers 111 mA when connected to a 60.5 Ω load. Determine the internal resistance of the batt

kow [346]

Answer:

$r = 27.4 \: ohm$

Explanation:

Using

E = I(R + r)

$9.76 = 111 \times {10}^{ - 3} (60.5 + r) \\ 87.928 = 60.5 + r \\ r = 27.4 \: ohm$

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3 years ago