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3 years ago

Is the chemical equation balanced? Zn + 2HCl → ZnCl2 + H2 no, or yes

Chemistry

1 answer:

tamaranim1 [39]3 years ago

3 0

Answer:

Yes.

General Formulas and Concepts:

Chemistry - Stoichiometry

Balancing reactions
Reaction prediction

Explanation:

Step 1: RxN

Zn + HCl → ZnCl₂ + H₂

Step 2: Balance RxN

Zn + 2HCl → ZnCl₂ + H₂

Need 2 H's on both sides
Need equal amount of Cl's on both sides

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Which statement best explains what causes the phase change from solid ice to liquid water?

Fofino [41]

It would be c because it has to get hot so it is absorbing the heat not releasing it

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2 years ago

Given the equation C3H8(g) + O2(g) = CO2(g) + H2O(g) and that the enthalpies of formation for H2O(g) = -241.8 kJ/mol, CO2(g) = -

kari74 [83]

Answer: 72.4 kJ/mol

Explanation:

The balanced chemical reaction is,

$C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(l)$ $\Delta H=-2220.1kJ/mol$

The expression for enthalpy change is,

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

$\Delta H=[(n_{CO_2}\times \Delta H_{CO_2})+(n_{H_2O}\times \Delta H_{H_2O})]-[(n_{O_2}\times \Delta H_{O_2})+(n_{C_3H_8}\times \Delta H_{C_3H_8})]$

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

$-2220.1=[(3\times -393.5)+(4\times -241.8)]-[(5\times 0)+(1\times \Delta H_{C_3H_8})]$

$\Delta H_{C_3H_8}=72.4kJ/mol$

Therefore, the heat of formation of propane is 72.4 kJ/mol

7 0

3 years ago

Draw the major product of the reaction between 1-butanol and na2cr2o7, h2so4, h2o

Tju [1.3M]

The major product of reaction between 1-butanol and Na2Cr2O7 is butanoic acid.

When a primary alcohol like 1-butanol (OH is bonded to a primary carbon) is begin to oxidize in the presence of strong oxidizing reagent such as sodium dichromate (Na2Cr2O7) and H2SO4, sulfuric acid, the stepwise oxidation take place as above firstly to the corresponding aldehyde which undergoes further oxidation to the corresponding carboxylic acid.

You can find that the formed aldehyde after first oxidation is butanal and the only organic product, due to the strong oxidizing reagent is butanoic acid.

Thus, the major product formed is butanoic acid.

learn more about oxidation:

brainly.com/question/13059271

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