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satela [25.4K]
4 years ago
11

Which of the following is not part of daltons atomic theory

Chemistry
1 answer:
White raven [17]4 years ago
7 0
<span>Different elements are composed of different atoms.</span>
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Predict the energy trend as a substance changes from a solid to liquid to gas on this graph.
Vladimir [108]
Answer:
            Option-A (<span> It would increase from bottom left to top right) is the correct answer.

Explanation:
                   As we know converting solids into liquids and converting liquids into gases require energy. This energy provided increases the energy of the state and its particles start moving with higher velocities. Therefore, the energy of solids will be lower than liquids and gases respectively. While, liquids have greater energy than solids but less energy than gases. And, gases are the most energetic than solids and liquids.</span>
8 0
3 years ago
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Help asap please.<br> NO LINKS!!!!!<br> Will mark as the brainliest.
hichkok12 [17]

Answer:

The answers to your questions are given below below

Explanation:

1. The calculation will require multiple steps because the unit of measurement of the theoretical and actual yield is different.

2. Determination of the percentage yield.

We'll begin by converting 6733 mg to g. This can be obtained as follow:

1000 mg = 1 g

Therefore,

6733 mg = 6733 mg × 1 g / 1000 mg

6733 mg = 6.733 g

Finally, we shall determine the percentage yield. This can be obtained as follow:

Theoretical yield = 14.79 g

Actual yield = 6.733 g

Percentage yield =?

Percentage yield = Actual yield /Theoretical yield × 100

Percentage yield = 6.733 / 14.79 × 100

Percentage yield = 673.3 / 14.79

Percentage yield = 45.5%

7 0
3 years ago
Calculate Δ H° for the reaction C 4H 4( g) + 2H 2( g) → C 4H 8( g), using the following data: Δ H° combustion for C 4H 4( g) = –
arlik [135]

<u>Answer:</u> The enthalpy of the reaction is coming out to be 2231 kJ.

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as \Delta H^o

The equation used to calculate enthalpy change is of a reaction is:  

\Delta H^o_{rxn}=\sum [n\times \Delta H^o_{(product)}]-\sum [n\times \Delta H^o_{(reactant)}]

For the given chemical reaction:

C_4H_4(g)+2H_2(g)\rightarrow C_4H_8(g)

The equation for the enthalpy change of the above reaction is:

\Delta H^o_{rxn}=[(1\times \Delta H^o_{(C_4H_8(g))})]-[(1\times \Delta H^o_{(C_4H_4(g))})+(2\times \Delta H^o_{(H_2(g))})]

We are given:

\Delta H^o_{(C_4H_8(g))}=-2755kJ/mol\\\Delta H^o_{(H_2(g))}=-286kJ/mol\\\Delta H^o_{(C_4H_4(g))}=-2341kJ/mol

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-2755))]-[(1\times (-286))+(2\times (-2341))]\\\\\Delta H^o_{rxn}=2213kJ

Hence, the enthalpy of the reaction is coming out to be 2231 kJ.

5 0
3 years ago
According to the FDA, products labeled gluten-free must contain less than _______ of gluten.
Svet_ta [14]
According to the FDA, products labeled gluten-free must contain less than 20 milligrams of gluten
3 0
4 years ago
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Soaps are bases and therefore tastes ________-<br> A. sour B. salty or C.Bitter
uysha [10]
B. Apparently it's bitter. Did not know that
5 0
3 years ago
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