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Andrej [43]
3 years ago
10

Two children bring home a salt-water fish for their new fish tank. The children are eager to put their fish into the new fish ta

nk, but have to
create a salt water solution to fill the tank first. The children plan to compete to see whose solution will be finished first.
Particle Size of Salt
Temperature of Solvent
Level of Agitation
Solution A
Sea salt (small clumps)
Cold water
Slow stirring
Solution B
Granular salt (tiny grains)
Hot water
Fast stirring
What do you believe the outcome will be from these solutions?
O A Solution A will take less time to dissolve, because gently stirring will allow it to combine more evenly
OB Solution will take less time to dissolve, because hot water will cause some of the salt to evaporate.
O c Solution A will take longer to dissolve and might have some undissolved salt remaining at the bottom of the solution due to the low
temperature.
OD Solution will take longer to dissolve and might have some undissolved salt remaining at the bottom of the solution due to the
high temperature

Chemistry
1 answer:
Elena-2011 [213]3 years ago
5 0

Answer:

b.

Explanation:

. i got it from my smart friend

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4 0
4 years ago
Which model correctly describes the locations of protons and electrons in the wave mechanical model of the atom?
masya89 [10]
The model correctly describes the locations of protons and electrons in the wave mechanical model of the atom is the <span>proton in nucleas, electron in regions of most probable location. 

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3 years ago
Read 2 more answers
Is saturated fat the same as trans fat?
Oduvanchick [21]

Answer:

Saturated fat occurs naturally in red meat and dairy products. It's also found in baked goods and fried foods. Trans fat occurs naturally in small amounts in red meat and dairy products. Trans fat can also be manufactured by adding hydrogen to vegetable oil.

4 0
3 years ago
Consider the reaction Ca(OH)2(s)→CaO(s)+H2O(l) with enthalpy of reaction ΔHrxn∘=65.2kJ/mol What is the enthalpy of formation of
Ganezh [65]

Answer:

ΔH °fCaO= -655.09 KJ/mol =  ΔH °fCaO

Explanation:

ΔH °(reaction)a=ΔH °f(product)-ΔH °f(reactant)

where,

ΔH °f(product)=is the standard heat of formation of products

-ΔH °f(reactant)=is the standard heat of formation of reactants

The standard heat of formation of  H 2 O ( l )  is  − 285.8 k J / m o l .

The standard heat of formation of  Ca(OH )2  is  − 986.09 k J / m o l .

For the given reaction, the standard enthalpy change is calculated by the expression shown below.

ΔH °(reaction)a=ΔH °f(CaO+H2O)-ΔH °f(Ca(OH)₂

65.2                =  ΔH °fCaO+( -265.8) -(-986.09)

                       = ΔH °fCaO-265.8+986.09

65.2                        =  ΔH °fCaO+ 720.29

65.2-720.29      =  ΔH °fCaO

-655.09 KJ/mol ==  ΔH °fCaO

3 0
3 years ago
The next 3 questions will walk you through using the Henderson-Hasselbalch equation for the following question. For each step pr
kicyunya [14]

Answer:

<em>The pKa is 13.0.</em>

Explanation:

pKa + pKb = 14

Given, Kb of trimethylamine = 6.3 × 10^{-5}

pKb = - log (6.3 × 10^{-5})

= 1.0

⇒ pKa = 14 - pKb = 14 - 1.0

<u>pKa = 13.0</u>

<em><u></u></em>

<em>Check: For most weak acids,  pKa ranges from 2 to 13.</em>

8 0
3 years ago
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