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2 years ago

Which of the following statements correctly explains why we experience seasons?

1 answer:

8 0

Answer: I believe C is your best answer

Explanation: The earth revolves around the sun in an elongated circle. Every year is one full “circle.” Due to the earth also having a tilt on its axis, one “side” of the earth is usually closer to the sun. So In the first quarter of the earth’s travel around the sun, it’ll be winter, then the next quarter, spring, followed by Summer halfway through and then Autumn/fall. Such can be compared to how the seasons each usually fill in about a quarter of your calendar. That was explained a bit confusing but I hope I helped, good luck!

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The empirical formula for a compound is C2H4NO. If its molar mass is 232.2 g/mol, what is the molecular formula of the compound?

Irina18 [472]

Empirical formula mass

C2H4NO
2(12)+4(1)+14+16
30+24+4
58g/mol

Molar mass=232.2g/mol

Find n

Molar mass/Empirical formula mass
232.2/58
4

Molecular formula

n×Empirical formula
4(C2H4NO)
C8H16(NO)_4

4 0

2 years ago

after 252 days, a 12.0-g sample of the radioisotope scandium-46 contains only 1.5 g of the isotope. what is the half-life of sca

wolverine [178]

12➡6➡3➡1.5
① ② ③
3 half life = 252
half life = 84days

7 0

3 years ago

What is an extensive property that can be calculated?

padilas [110]

Answer: The property which depends on the quantity of the substance is called an extensive property. The free energy change for a reaction (Δ G) depends on the quantity of the substance and is therefore an extensive property. It shows the additive nature. The extensive property Δ G is easily calculated from the formula, ΔG = -nFE cell.

Explanation:

4 0

3 years ago

A lab director asks two students, Lydia and Damien, to each select a bottle of a concentrated weak base. When they reach the cab

algol13

Lydia and Damien should select the bottle of weak base with high molarity(M)

<h3>Further explanation</h3>

According to Arrhenius, Base is a compound which in water releases OH- ions

Electrolytes (acids or bases) with a small degree of ionization are classified as weak electrolytes

If two students, Lydia and Damien, select each bottle of a concentrated weak base, then a guide can be chosen to choose some of the solutions available in the lab :

Base compounds are usually known from their names ending in hydroxide suffixes such as NaOH, sodium hydroxide

The weak base will be partially ionized in water because the ionization degree is close to 0 or less than 1

If there is a Kb value (base ionization constant), then this shows the strength of the base. The greater the value of Kb, the greater the base strength

If there are some weak bases, then Lydia and Damien choose the highest concentration, usually indicated by the value of Molarity (M)

Because no choice solution is included, the weak base example is:

Ammonia (NH₃)

Aluminum hydroxide (Al (OH)₃)

Copper (II) hydroxide Cu (OH)₂

Mercury (II) hydroxide Hg (OH)₂

<h3>Learn more</h3>

the Brønsted theory

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base would not effectively deprotonate acetylene

brainly.com/question/5613072

Keywords : weak base, select a bottle, chemical solutions

#LearnWithBrainly

8 0

3 years ago

All the following are compounds except. A.water. B.sugar solution. C.aqueous. D.sulphur dioxide

kap26 [50]

Answer:

B.sugar solution

Explanation:

A sugar solution is not a compound.

Rather, the solution is a mixture and an impure substance.

A compound is composed of two or more kinds of atoms or elements joined in a definite grouping .
The properties of the compound is distinct from those of the individual atoms that makes them.
Sugar solution is sugar and water
It is made up of two compounds not chemically combined.

5 0

3 years ago