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3 years ago

Why do historians analyze historical events and cause and effect relationship

2 answers:

8 0

Recognizing patterns of cause and effect is an important analytical skill that allows historians to explain why things happened the way they did in the past. It's also a strategy that can make it possible to predict what may happen in the future.

Arte-miy333 [17]3 years ago

7 0

Answer:

yeah. def

Explanation:

becuase someone told me to

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Nault 25000L 250 our = 25000L 15040 8. How many grams of CaCl2 are needed to make 150.0 mL of a 0.500 M CF solution? (Note: CaCl

yuradex [85]

Answer:

You need 8,324 g of CaCl₂ yo make this solution

Explanation:

Molarity is a way to express concentration in a solution, in units of moles of solute per liter of solution.

To know the grams of CaCl₂ it is necessary to know, first, the moles of this substance with the desired volume and concentration , thus:

0,1500 L × $\frac{0,500 mol}{L}$ = 0,075 CaCl₂ moles

Now, with the molar mass of CaCl₂ you will obtain the necessary grams, thus:

0,075 CaCl₂ moles × $\frac{110,98 g}{mol}$ = 8,324 g of CaCl₂

So, you need <em>8,324 g of CaCl₂</em> to make 150,0 mL of a 0,500M solution

I hope it helps!

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3 years ago

Новый источник энергии получивший распространение в годы второй промышленной революции

marshall27 [118]

1860-х годах, а кульминацией — распространение поточного производства и поточных линий. В 1860—1870-х годах технологическая революция быстро охватила Западную Европу, США, Российскую империю и Японию.

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3 years ago

Does sodium fluoride follow the octet rule? If not, which exception is it?

krek1111 [17]

Answer:

Sodium fluoride (NaF) does indeed follow the octet rule without any violations.

3 0

2 years ago

When NH4NO3 spontaneously dissolves in water the temperature of the solution decreases. What factors make this a naturally occu

erma4kov [3.2K]

Explanation:

Once solid ammonium nitrate interacts with water, the molecules of polar water intermingle with these ions and attract individual ions from the structure of the lattice, that actually will break down. E.g;-NH4NO3(s) — NH4+(aq)+ NO3-(aq) To split the ionic bonds that bind the lattice intact takes energy that is drained from the surroundings to cool the solution.

Some heat energy is produced once the ammonium and nitrate ions react with the water molecules (exothermic reaction), however this heat is far below that is needed by the H2O molecules to split the powerful ionic bonds in the solid ammonium nitrate.

Hence, we can say that the dissolution of ammonium nitrate in water is highly endothermic reaction.

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3 years ago

Which of the following is the correct name for the compound HF?

alexira [117]

Name for the compound HF is Hydrogen fluoride.
Hope this helps!

6 0

3 years ago

Read 2 more answers