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VikaD [51]
4 years ago
14

Given 1kg=2.20 lbs, how many kilograms are in 125 lbs? (Metric conversion)

Chemistry
1 answer:
Nadya [2.5K]4 years ago
7 0

Answer:

56.82 Kg

Explanation:

Given data:

1 Kg = 2.20 lbs

Number of kilogram in 125 lbs = ?

Solution:

lbs is used for pound. lb is abbreviation of libra. It is Latin word meaning balance.

Both kilogram and pounds are units of mass. Pound is smaller unit than kilogram.

one Kg = 2.20 lbs

Number of kg in 125 lbs:

125 lbs × 1 Kg/2.20 lbs

125 lbs.Kg/2.20 lbs

56.82 Kg

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miv72 [106K]
1.75 (moles O2) × 6 (moles H2O) ÷ 9 (moles O2) = 1.17 (moles H2O)

You have to convert moles of O2 into moles of H2O so it's the number of moles you start with (1.75 O2) × the number of moles from the element you want (6 H20), then ÷ by the number of moles that the element that you already have (9 O2).
8 0
4 years ago
1. Which can happen during a physical change? (2 points)
Tju [1.3M]
I believe the correct answer from the choices listed above is the first option. During a physical change, m<span>olecules can move more rapidly and freely and change states. Such action, would not disrupt or destroy the nature of the molecules they will still have  the same molecular structure. Hope this answers the question.</span>
6 0
3 years ago
Read 2 more answers
You carry out a reaction that yields a major product Q (boiling point: 120°C) and side product R (boiling point: 150°C). The rat
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Answer:

Here's what I get  

Explanation:

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The solute must be more soluble in the solvent (the extract phase) than in the raffinate phase (the other liquid).

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The solvent and the other liquid must be mutually immiscible. This means they will form two layers in the separatory funnel.

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2. Extract layer

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The density of water is 1.00 g g/mL.

The ethyl acetate layer will be on the top.

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4. Type of distillation  

The boiling point difference is only 30°C, so you must use fractional distillation.

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8 0
4 years ago
Consider the reaction between hcl and o2: 4hcl(g)+o2(g)→2h2o(l)+2cl2(g) when 63.1 g of hcl are allowed to react with 17.2 g of o
Roman55 [17]
The balanced chemical reaction is expressed as:

<span>4hcl(g)+o2(g)→2h2o(l)+2cl2(g)

To determine the percent yield of the reaction, we need to calculate for the theoretical yield. This is the maximum amount of the product that can be produced from the reaction given the initial amounts of the reactants. First, we identify the limiting reactant as follows:

</span><span>63.1 g of hcl ( 1 mol / 36.46 g ) ( 1 mol O2 / 4 mol HCl) ( 32 g / mol) = 13.85 g O2 
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Therefore, the limiting reactant would be HCl. We use the value for the HCl to calculate for the theoretical yield.

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Answer: The answer is Sc

Explanation:

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