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navik [9.2K]
4 years ago
11

What is E=mc2? please be specific.

Chemistry
1 answer:
LenaWriter [7]4 years ago
4 0

E = mc2 is an equation. E represents units of energy, m represents units of mass and c2 is the speed of light squared or multiplied by itself.

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Why do astronauts, miners, divers and mountaineers carry oxygen cylinders with them?
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So they can breathe because us humans need oxygen
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3 years ago
Why are chemical equilibria called dynamic equilibria?
Serga [27]

Answer:

Because molecules are moving so they change from reactants to products and vice versa.

Explanation:

Hello,

In this case, it is widely known that chemical equilibrium is related with such condition at which the rate of consumption of reactants and formation of products tends to zero so their concentrations remain the same over the time. For instance, if we consider the formation of hydrogen chloride at equilibrium:

H_2+Cl_2\rightleftharpoons 2HCl

We can also see that the reactants, hydrogen and chlorine are consumed to form hydrogen chloride and it also goes back to its reactants in a dynamic equilibrium (because they are constantly changing).

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4 0
3 years ago
Help pls nelp due tonight
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3 years ago
What are the three components of every titration?
just olya [345]

Titration is a common method of determining the amount or concentration of an unknown substance. The method is easy to use if the quantitative relationship between two reacting solutions is known. The method is particularly well-suited to acid-base and oxidation-reduction reactions. Titrations are routinely used in industry to analyze products to be sold. Many manufacturers are under strict standards of quality control because their products are sold for public consumption. In this experiment, we will analyze a number of commercial products and, in some cases, test the validity of the information given on their labels and/or the claims made in television commercials. The products to be tested include antacid tablets, vinegar, fruit juice, and household ammonia.

Just want to help you understand :)) If you need any more help comment on this and I will be glad to help :D

 

6 0
3 years ago
11) What is the volume of 4.92 grams of hydrogen gas at STP? (Show the work using dimensional analysis)
lorasvet [3.4K]

Answer:

The volume of 4.92 grams of hydrogen gas at STP is 9.105 litter.

Explanation:

We know that, the molecular weight of hydrogen gas (H_{2} ) = 1\times 2 = 2.

Moles of hydrogen gas = \frac{weight}{molecular weight}  = \frac{4.92}{2} = 2.46 moles.

At STP, 1 mole of hydrogen gas = occupies 22.4 litter

    So, 2.46 mole of hydrogen gas = occupies \frac{22.4}{2.46} = 9.105 litter.

Hence, the volume of 2.46 grams of hydrogen gas at STP is 9.105 litter.

4 0
3 years ago
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