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scoundrel [369]
3 years ago
8

Which statement correctly compares and contrasts the information represented by the chemical formula and model of a compound? Bo

th show how the atoms in a compound are connected. Models show how the atoms in a compound are connected. Chemical formulas show how the atoms in a compound are connected.
Chemistry
2 answers:
aleksandr82 [10.1K]3 years ago
8 0

Answer:

Models show how the atoms in a compound are connected.

I just took this instruction so make sure to press that <u>THANKS </u>button!

batgirl1000000000000000000000
2 years ago
thanks
Tema [17]3 years ago
7 0
The correct answer is: Models show how the atoms in a compound are connected.
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What is the electron configuration of Zn2+
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. 1s2 2s2 2p6 3s2 3p6 3d10 One point is earned for the correct configuration.
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3 years ago
Acetylene burns in air according to the following equation: C2H2(g) + 5 2 O2(g) → 2 CO2(g) + H2O(g) ΔH o rxn = −1255.8 kJ Given
professor190 [17]

Answer:  -227 kJ

Explanation:

The balanced chemical reaction is,

C_2H_2(g)+\frac{5}{2}O_2(g)\rightarrow 2CO_2(g)+H_2O(g)

The expression for enthalpy change is,

\Delta H=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]

\Delta H=[(n_{CO_2}\times \Delta H_{CO_2})+ n_{H_2O}\times \Delta H_{H_2O})]-[(n_{C_2H_2}\times \Delta H_{C_2H_2})+(n_{O_2}\times \Delta H_{O_2})]

where,

n = number of moles

\Delta H_{O_2}=0 (as heat of formation of substances in their standard state is zero

Now put all the given values in this expression, we get

-1255.8=[(2\times -393.5)+(1\times -241.8)]-[(1\times \Delta H_{C_2H_2})+(\frac{5}{2}\times 0)]

-1255.8=[(-787)+(-241.8)]-[(1\times \Delta H_{C_2H_2})+(0)]

\Delta H_{C_2H_2}=-227kJ

Therefore, the enthalpy change for C_2H_2 is -227 kJ.

7 0
3 years ago
If I have 450 grams of Iron, how many moles of Iron do I have
Alborosie

Answer:

The answer is A: 0.8 moles

Explanation:

4 0
3 years ago
Multiply or divide to find the equivalent fraction.<br><br> 51/120=□/360
jok3333 [9.3K]

Answer

153

Explanation:

51/120 = x/360

51(360) = 120x

18360 = 120x

18360/120x = 120x/120x

153 = x

5 0
3 years ago
Read 2 more answers
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