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Mademuasel [1]
3 years ago
14

What happens to the temperature and density of the material between points B and C?

Chemistry
1 answer:
makvit [3.9K]3 years ago
7 0

Answer:

Temperature decreases and density increases

Explanation:

Let us remember that density of a material increases as the temperature of the material decreases. So the cooler a material becomes, the denser it becomes also.

Between points B and C, the material rapidly cools down and the temperature decreases accordingly. This ultimately results in an increase in density since cooler materials are denser than hot materials.

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To calculate the mass of Fe formed in a) we get first the limiting reactant between Fe2O3 and CO. Given the masses, the ratio of Fe2O3 is 1.33 while that of CO is 1.67. Hence the limiting reagent is Fe2O3. The mass of Fe formed is 148.98 grams. In b, the needed CO is only 112.04 grams. Hence, the excess is 27. 96 grams. 
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3 years ago
Which of the following molecules, having a bond with chlorine, contains an ionic bond? Chlorine gas, Calcuim Chloride, Carbon Te
natka813 [3]

Answer: In calcium chloride there is one calcium atom and two chloride atoms attached to it, it has an ionic bond with chlorine and calcium. A bond is said to be an ionic bond if it is formed by the electrostatic attraction between one negatively charged and one positively charged ions. Ions are the atoms which are formed on the gain or loss of electrons to an atom. All the other molecules have covalent bonds, which forms on sharing of electron pairs.

5 0
3 years ago
Which of the following is the best name for a compound made from calcium and bromine? (CaBr2) calcium bromide calcium dibromide
Mice21 [21]

Answer:

Calcium bromide

Explanation:

When naming compounds, the use of prefixes depend on the type of bond made. In this case, calcium and bromine form a ionic bond because calcium is a metal and bromine is a non-metal.

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7 0
3 years ago
How many atoms are in 1.7 mols of CHF3
erastovalidia [21]

Given :

Number of moles of CHF₃ is 1.7 .

Solution :

We know, 1 mole of any complex contains 6.022 × 10²³ molecules.

Let, 1.7 moles of CHF₃ contains n numbers of molecules.

So, n = 1.7 × 6.022 × 10²³ molecules

n = 10.2374 × 10²³ molecules

n = 1.0237 × 10²³ molecules

Hence, this is the required solution.

5 0
2 years ago
PLEASE HELP FAST!!!! Which of the following is NOT an intensive physical property?
Zarrin [17]
Volume is an extensive physical property and not an intensive one.
7 0
2 years ago
Read 2 more answers
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