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3 years ago

0.74 mol = ___ atomsfill in the blank

1 answer:

8 0

To convert from moles to atoms you times the number of mols by Avogadro's number (6.022×10²³)

0.74 × 6.022×10²³ = 4.45628×10²³

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For the reaction represented by the equation Fe + H2O ® Fe2O3 + H2, how many moles of iron(III) oxide are produced from 285 g of

schepotkina [342]

Balanced equation: 2Fe + 3H2O → Fe2O3 +3H2

Convert g to mols:

285/55.845 = 5.1034 mols

Mole ratio of Iron and Iron (III) Oxide: 2:1

5.1034/2 = 2.5517 mols

8 0

3 years ago

How can the mechanical advantage of a lever be increased?

valentina_108 [34]

The answer is; A

The force or weight and distance on both sides of the fulcrum is given by the following ratio;

MA = Fb/Fa = a/b (MA = Mechanical Advantage)

The greater the distance from the fulcrum on which force is applied to lift a load on the other side of the fulcrum, the less the effort required.

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3 years ago

2.67 grams of butane (C4H10) is combusted in a bomb calorimeter. The temperature increases from 25.68 C to 36.2C. What is the ch

slavikrds [6]

The internal energy : 1310.43 kJ/mol

<h3>Further explanation</h3>

Internal energy (ΔE) can be formulated for Calorimeter :

$\tt \Delta E=C\times.\Delta t$

C= the heat capacity of the calorimeter

Δt=36.2-25.68=10.52°C

$\tt \Delta E=5.73 kJ/^oC\times 10.52^oC=60.2796~kJ$

mol butane(MW=58,12 g/mol)

$\tt \dfrac{2.67}{58,12 }=0.046$

the internal energy (ΔE) in KJ/mol

$\tt \dfrac{60.2796}{0.046}=1310.43~kJ/mol$

7 0

3 years ago

What type of cleaner is appropriate for grease that has built up on appliances?

evablogger [386]

Baking soda and dish soap! youre welcome

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4 years ago

Read 2 more answers

Which of the following compounds is an unsaturated hydrocarbon?

Jobisdone [24]

Answer:

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms.These are called as alkanes. The general formula for these hydrocarbons is $C_nH_{2n+2}$

Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is $C_nH_{2n}$ and $C_nH_{2n-2}$ .

1. Propyne is $C_3H_4$ and is an unsaturated hydrocarbon.

2. Methane is $CH_4$ and is a saturated hydrocarbon

3. Nonane is $C_9H_{20}$ is a saturated hydrocarbon.

4. Methyl is $CH_3$ and is a saturated alkyl group.

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4 years ago