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choli [55]
2 years ago
11

Substance A and B are chemically exactly the same. The molecules in substance A move much faster and are less ordered than the m

olecules in substance B, which vibrate slowly and are arranged in an fixed, orderly, regular array. Which statement could be true?
Substance A is a liquid, while substance B is a liquid or gas.

Substance A is a solid, while substance B is a liquid or gas.

Substance A is a liquid or gas, while substance B is a solid.

Substance A is a liquid or gas, while substance B is a gas.
Chemistry
2 answers:
Elina [12.6K]2 years ago
7 0

Answer:

substance A is a liquid, while substance B is a liquid or gas

scoray [572]2 years ago
4 0

Substance A is a liquid or gas, while substance B is a solid.

Answer: C

Explanation

The real world is made up of matters which can be classified into four types based on their condensed state. They are solid, liquid, gas and plasma.

Basically the matter is classified as solid, liquid and gases only.

Solid are the substance which have orderly arranged atoms and the most condensed state, the molecules vibrate very slowly in a solid molecule.

So this is matching with the properties given for Substance B.

The properties of other substance A is stated as less ordered and more vibrational frequency or we can say that molecules in substance A can travel faster than the molecules of substance B.

This can possible only when the substance A is either liquid or gas.

Because liquid or gas molecules have loosely arranged atoms compared to solid and they are the ones whose molecules can run faster compared to solid.

So substance A can be a gas or a liquid, while substance B is a solid.

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Answer:

A.hydrochloric acid

Explanation:

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Choose the nonmetallic elements from the list. Check all that apply yttrium: oxygen: boron: polonium: argon: gallium: carbon:
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Answer:

B, E, & G

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3 years ago
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Why is the increasing amount of carbon dioxide being taken up by the oceans a cause for concern?
Anna007 [38]

Answer;

-More carbon dioxide causes an increase in carbonic acid (H2CO3) which leads to a decrease in the concentration of carbonate ion (CO32-).

Explanation;

-Carbon dioxide is added to the atmosphere whenever people burn fossil fuels. Oceans play an important role in keeping the Earth's carbon cycle in balance.

-As the amount of carbon dioxide in the atmosphere increases, the oceans absorb a lot of it. In the ocean, carbon dioxide reacts with seawater to form carbonic acid which causes the acidity of seawater to increase.

-As long as we keep putting extra carbon dioxide in the atmosphere, the acidity of the ocean will continue to increase. The effect is that; Increasing acidity makes it harder for corals to build skeletons and for shellfish to build the shells they need for protection. Corals are particularly important because they provide homes for many other sea creatures.

7 0
2 years ago
What is Charles law ?
Alenkinab [10]
Charles' law (also known as the law of volumes) is an experimental gas law that describes how gases tend to expand when heated.
5 0
3 years ago
A 200.0 mL solution of 0.40 M ammonium chloride was titrated with 0.80 M sodium hydroxide. What was the pH of the solution after
choli [55]

Answer:

9.25

Explanation:

Let first find the moles of NH_4Cl and NaOH

number of moles of NH_4Cl = 0.40  mol/L × 200 ×  10⁻³L

= 0.08 mole

number of moles of NaOH = 0.80  mol/L × 50 ×  10⁻³L

= 0.04 mole

The equation for the reaction is expressed as:

NH^+_{4(aq)} \ + OH^-_{(aq)} ------> NH_{3(g)} \ + H_2O_{(l)}

The ICE Table is shown below as follows:

                            NH^+_{4(aq)} \ + OH^-_{(aq)} ------> NH_{3(g)} \ + H_2O_{(l)}

Initial (M)              0.08            0.04                            0

Change (M)         - 0.04          -0.04                          + 0.04

Equilibrium (M)      0.04             0                                0.04

K_a*K_b = 10^{-14} \ at \ 25^0C

K_a = \frac{10^{-14}}{K_b}

K_a = \frac{10^{-14}}{1.76*10^{-5}}

K_a= 5.68*10^{10}

pK_a = - log \ (K_a)

pK_a = - log \ (5.68*10^{-10})

pK_a = 9.25

pH = pKa + \ log (\frac{HB}{HA} )   for buffer solutions

pH = pKa + \ log (\frac{moles \ of \ base }{ moles\ of \ acid} ) since they are in the same solution

pH = 9.25 + \ log (\frac{0.04 }{ 0.04} )

pH = 9.25

8 0
2 years ago
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