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galben [10]
3 years ago
12

How many continents is there?

Chemistry
2 answers:
Monica [59]3 years ago
8 0

there are seven continents. hope I helped!

here they are: Africa, Antarctica, Asia, Australia/Oceania, Europe, North America, and South America

kati45 [8]3 years ago
4 0

there are seven continents:


Africa, Antarctica, Asia, Australia/Oceania, Europe, North America, and South America.:)

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The answer is in the attachment below:

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Is 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O a double replacement?
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Answer:

The answer to your question is No, it is not.

Explanation:

Data

                C₄H₁₀  +  13O₂   ⇒   8CO₂ +  10H₂O

In a double replacement reaction, two reactants interchange cations an example of these reactions are neutralization reactions. In neutralization reactions, an acid and a base react to form a salt and water.

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4 years ago
Mixtures are two or more substances that are not chemically combined. Which of the following statements is true about the mixtur
chubhunter [2.5K]
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2</span>
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5 0
3 years ago
Read 2 more answers
NEED ANSWERS ASAP!!! 20 POINTS IF YOU ANSWER ALL QUESTIONS(NO LINKS, SPAMMING OR GUESSING)
Vlad [161]

Captionless Image

sepal

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The fertilized ovule turns into the fruit and the ovary turns into the seed.

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The fertilized ovule turns into honey and the ovary turns into nectar.

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big ... bright

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big ... dull

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3 0
3 years ago
A laser pulse with wavelength 545 nm contains 4.85 mJ of energy. How many photons are in the laser pulse?
dusya [7]

<u>Given</u>:

Wavelength (λ) of the laser pulse = 545 nm = 5.45 * 10⁻⁹ m

Total energy of pulse = 4.85 mJ

<u>To determine:</u>

The number of photons in the laser of a given energy

<u>Explanation:</u>

Energy per photon (E) = hc/λ

where h = planck's constant = 6.626 *10⁻³⁴ Js

C = speed of light = 3*10⁸ m/s

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Ans: the laser pulse contains 1.32 * 10¹⁶ photons

3 0
4 years ago
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