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iragen [17]
3 years ago
12

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:

<u>Chemistry - Stoichiometry</u>

  • Balancing reactions
  • Reaction prediction

Explanation:

<u>Step 1: RxN</u>

Zn + HCl → ZnCl₂ + H₂

<u>Step 2: Balance RxN</u>

Zn + 2HCl → ZnCl₂ + H₂

  • Need 2 H's on both sides
  • Need equal amount of Cl's on both sides
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Limestone (CaCO3) is decomposed by heating to quicklime (CaO) and carbon dioxide. Calculate how many grams of quicklime can be p
Harman [31]

Answer: 2800 g

Explanation:

CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass = 5 kg = 5000 g

\text{Number of moles}=\frac{5000g}{100g/mol}=50moles

1 mole of CaCO_3 produces = 1 mole of CaO

50 moles of CaCO_3 produces =\frac{1}{1}\times 50=50moles of CaO

Mass of CaO=moles\times {\text{Molar mass}}=50moles\times 56g/mole=2800g

2800 g of CaO is produced from 5.0 kg of limestone.

3 0
4 years ago
How is the concentration of h3o ions and oh- ions different in an acid solution and a basic soulution?
Lubov Fominskaja [6]
In an acidic solution, the concentration of H+ is greater than the concentration of OH-. The pH will be less than 7.
In a basic solution, the concentration of OH- is greater than the concentration of H+. The pH will be greater than 7.
In a neutral solution, the concentration of H+ ions to OH-ions will be equal, and will therefore have a pH of 7. (This is due to water autoionization, which we usually ignore because it is small in other circumstances.)
5 0
3 years ago
Consider 4.60 L of a gas at 365 mmHg and 20 C . If the container is compressed to 2.60 L and the temperature is increased to 36
BaLLatris [955]

Explanation:

The given data is as follows.

       V_{1} = 4.60 L,        P_{1} = 365 mm Hg

       V_{2} = 2.60 L,       P_{2} = ?

       T_{1} = (20 + 273) K = 293 K,      T_{2} = (36 + 273) K = 309 K

Since, number of moles of gas are equal so, according to ideal gas equation:

          \frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}

          \frac{365 mm Hg \times 4.60 L}{293 K} = \frac{P_{2} \times 2.60 L}{309 K}

          P_{2} = 681.03 mm Hg

Thus, we can conclude that new pressure P_{2} is 681.03 mm Hg.

6 0
3 years ago
Write the chemical formula for iridium(III) nitride?
lubasha [3.4K]

Answer:

Ir(NO2)3

Explanation:

it's Molar Mass is 330.2335 if you need that too

3 0
3 years ago
How might a human muscle protein molecule differ from a cow muscle protein molecule?
soldi70 [24.7K]

Human muscle protein differ from a cow muscle protein molecule in the terms of number of mitochondria present, as in human number of mitochondria present is lesser than that of present in cow. Human muscles are not designed to do as much physical work as cows muscles are. Cow's muscles have more mitochondria so that they can generate ATP for physical activity without quickly defaulting to fermentation.  

5 0
3 years ago
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