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3 years ago

3. Which of the following items is representative of a homogeneous

2 answers:

5 0

The answer is F
Explanation: the answer is F because a homogenous mixture can’t be taken apart or separated which in that case once bread dough is formed you can no longer take out the flour and other ingredients and same with the smoothies you’ve blended the fruit together you can’t send it to its original state

Mazyrski [523]3 years ago

4 0

Answer: F. both c and d

Explanation:

homogeneous mixture is of same kind/phase. so the most appropriate answer we can take is smoothie and white bread dough :)

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Which solution contains phenolphthalein pink?

icang [17]

Any liquid with a pH above 8.2.

Phenolphthalein is naturally colorless but turns pink in alkaline solutions. The compound remains colorless throughout the range of acidic pH levels but begins to turn pink at a pH level of 8.2 and continues to a bright magenta at pH 10 and above.

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3 years ago

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Whats the difference between an atom and an ion?

Tpy6a [65]

An atom is the fundamental unit of matter and it contains an equal number of protons and electrons in its nucleus which makes it electrically neutral. An ion however, is an atom containing an unequal number of protons and electrons which means it will either carry a net positive charge or negative charge depending on whether there are more electrons or protons.

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3 years ago

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What is the standard entropy change for the reaction below? 2 CO(g) + 2 NO(g) → N2(g) + 2 CO2(g) S o (CO(g)) = 197.7 J/(mol·K) S

photoshop1234 [79]

Answer:

$\Delta _RS^o=-230J/(mol*K)$

Explanation:

Hello,

In this case, for the given chemical reaction:

$2 CO(g) + 2 NO(g) \rightarrow N_2(g) + 2 CO_2(g)$

The standard entropy change is computed by subtracting the products standard enthalpy and the reactants standard enthalpy considering each species stoichiometric coefficients:

$\Delta _RS^o=S ^o_{N2(g)}+2S ^o_{CO2(g)}-2S ^o_{CO(g)}-2S ^o_{NO(g)}\\\\\Delta _RS^o=191.6J/(mol*K)+2*213.8J/(mol*K) -2*213.8J/(mol*K) -2*210.8J/(mol*K)\\\\\Delta _RS^o=-230J/(mol*K)$

Best regards.

3 0

3 years ago

Read 2 more answers

Give the name of the following molecule. A compound with a total of 10 carbons with one double bond and the rest single bonds. T

soldier1979 [14.2K]

Answer:
The IUPAC name of compound is 6-Ethyl-2-Octene.

Explanation:

First of all draw a straight chain of 8 carbon atoms.

Make a double bond between carbon number 6 and 7 numbering from left.

Add ethyl group at position 3 starting from left.

The structure sketched is attached below,

According to rules the longest chain containing a double bond is selected. Numbering is started from the end to which double bond is nearer. So, in our case the double bond starts at carbon 2, hence parent name of compound is 2-Octene. Then the substituent at position 6 is named.

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3 years ago

Muriatic acid is the commercial name for hydrochloric acid that can be purchased from hardware stores as a solution that is 23%

erastovalidia [21]

So I set up the problem as follows: $.23=\frac{12gHLC}{XgSolution}
$
Solve for X, and you should get 52g Solution

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4 years ago