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Neko [114]
3 years ago
11

Use your calculator to determine the answer to the following calculation: 1.0×10^−15/4.2×10^−7

Chemistry
1 answer:
lianna [129]3 years ago
8 0
1.0×10^−15/4.2×10^−7=<span>2.3809524e-23 Hoped I helped!</span>
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The competition between the U.S. and the Soviet Union to get satellites and humans into space was known as the:
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Answer: It was known as the SPACE RACE.

Explanation: The space race was a cold war between the Soviet Union (USSR) and the United States (US), to get satellites and humans into space. The competition began in earnest on August 2, 1955, when the Soviet Union responded to the US announcement. On April 12, 1961, the USSR surprised the world again by launching Yuri Gagarin into a single orbit around the Earth in a craft they called Vostok 1.

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Describe how calcium and fluorine bond together to form calcium fluoride
monitta

Answer:<em>   A transfer of electrons occurs when fluorine and calcium react to form an ionic compound. This is because calcium is in group two and so forms ions with a two positive charge. ... A pairs of shared electrons makes one covalent bond. The compound formed is known as a molecule***</em>

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Which of the following is the correct scientific notation for 0.0000782 g?
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3 years ago
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How many molecules are there in a 1.43 mole sample of H2O2?
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2 years ago
Is a 93.3% solution dilute or concentrated?<br><br><br> Dilute<br><br><br> Concentrated
oksano4ka [1.4K]

Answer:

<u><em></em></u>

  • <u><em>Concentrated</em></u>

Explanation:

Concentration measures the amount of solute in a solution. There are many expressions of concentration. Some of then are percentage (mass/mass, volume/mass, volume/volume), molarity, molality, mole fraction, among others.

When a solution has a high concentration it is said that it is <em>concentrated; </em>when a solution has a low concentration is is said that is is diluted.

Concentrated solutions expressed in percentage typically have about 80 - 90% (or more) of solute.

Diluted solutions expressed in percentage, tipylcally have about 10% - 20% or less.

But they are not fixed limits. You might say that a 85% solution is concentrated. Acids at 75 % sure are concentrated.

Hence, a 93.3% solution is concentrated, definitely.

3 0
3 years ago
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