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Bas_tet [7]
3 years ago
11

How many liters are in 72.1 g HBr?

Chemistry
1 answer:
Igoryamba3 years ago
5 0

Answer:

0.0721

Explanation:

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How many moles are in 5.72 grams of iron (II) chloride
densk [106]

Answer:

0.0451 mol FeCl₂

General Formulas and Concepts:

<u>Chemistry - Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

5.72 g FeCl₂

<u>Step 2: Identify Conversions</u>

Molar Mass of Fe - 55.85 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of FeCl₂ - 55.85 + 2(35.45) = 126.75 g/mol

<u>Step 3: Convert</u>

<u />5.72 \ g \ FeCl_2(\frac{1 \ mol \ FeCl_2 }{126.75 \ g \ FeCl_2} ) = 0.045128 mol FeCl₂

<u>Step 4: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules and round.</em>

0.045128 mol FeCl₂ ≈ 0.0451 mol FeCl₂

8 0
3 years ago
Explain in detail the differences &amp; similarities between Fission &amp; Fusion
iren [92.7K]

Fusion and Fission both are nuclear reactions where the major difference between them is Fusion is combining process whereas fission is a breaking process.

<u>Explanation:</u>

<u>Similarity:</u>

Both Fission and Fusion are nuclear reactions that releases vast amount of energy.

<u>Difference:</u>

  • Fission is the splitting of heavier nucleus into lighter nuclei which generates maximum amount of energy whereas fusion is the combining 2 lighter nuclei to form a heavier nucleus and makes a vast energy.
  • The energy generated by fission reaction in these reactors heats up the water into steam. This steam is utilized to rotate a turbine to generate carbon-free electricity.  
  • Fusion reactions are difficult to retain for longer period of time since it needs tremendous amount of temperature and pressure to combine the nuclei together.
5 0
3 years ago
Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydr
lara [203]

Answer: A) grinding coffee beans

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.

1. Grinding coffee : Only change in size takes place, thus a physical change

2. Baking a cake: the chemical reaction occurs by combination of flour with oxygen , thus a chemical change.

3.:converting water to hydrogen and oxygen: The decomposition iof water takes place, thus is a chemical change

4.Burning of coal: the chemical reaction occurs by combination of carbon with oxygen , thus a chemical change.

5 0
3 years ago
Complete and balance each of the following equations for gas evolution reactions. (Express your answer as a chemical equation. I
kondor19780726 [428]

1) Balanced chemical reaction:

2HClO₄(aq) + K₂CO₃(aq) → K₂CO₃(aq) + CO₂(g) + H₂O(l).

2) Balanced chemical reaction:

HC₂H₃O₂(aq) + LiHSO₃(aq) → LiC₂H₃O₂(aq) (aq) + SO₂(g) + H₂O(l).

3) Balanced chemical reaction:

(NH₄)₂SO₄(aq) + Ca(OH)₂(aq) → CaSO₄(s) + 2NH₃(g) + 2H₂O(l).

CaSO₄ (calcium sulfate) is insoluble in water.

3 0
3 years ago
Read 2 more answers
At which temperature do the molecules of an ideal gas have 3 times the kinetic energy they have at 32of?
algol [13]

Answer:

  • 820 K

Explanation:

As per Boltzman equation, <em>kinetic energy (KE)</em> is in direct relation to the <em>temperature</em>, measured in absolute scale Kelvin.

  • KE α T.

Then, <em>the temperature at which the molecules of an ideal gas have 3 times the kinetic energy they have at any given temperature will be </em><em>3 times</em><em> such temperature.</em>

So, you must just convert the given temperature, 32°F, to kelvin scale.

You can do that in two stages.

  • First, convert 32°F to °C. Since, 32°F is the freezing temperature of water, you may remember that is 0°C. You can also use the conversion formula: T (°C) = [T (°F) - 32] / 1.80

  • Second, convert 0°C to kelvin:

         T (K) = T(°C) + 273.15 K= 273.15 K

Then, <u>3 times</u> gives you: 3 × 273.15 K = 819.45 K

Since, 32°F has two significant figures, you must report your answer with the same number of significan figures. That is 820 K.

7 0
3 years ago
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