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ThenaCykez t1_j2ah4n5 wrote

1.5L of pure water has a mass of 1.5kg. But soda has carbonic acid, sugar or sweeteners, other flavorings, and so on mixed in. Those additives could increase or decrease the density of the liquid.

1.5L of milk would weigh about 1.55kg. 1.5L of unflavored soda water would weigh about 1.48kg.

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ScienceIsSexy420 t1_j2al1m6 wrote

I want to expand on this. 1.5L of water weighs 1.5kg by definition. The original definition of the mL was the cubic volume of 1g of pure water at 20°C. So it's is not a coincidence that these numbers are the same, or that the density of pure water is 1.0000, it is so BY DEFINITION.

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mjb2012 t1_j2ao3j8 wrote

For the benefit of the OP, slightly more ELI5: “by definition” here means that the people who invented the kilogram intentionally said that a kilogram is whatever 1 litre of distilled water weighs (or rather, its mass) at sea level. Basically. So yes, the weight of the soda bottle in kg must be pretty close to it’s volume in litres, assuming it’s filled with mostly water and assuming you’re on the surface of the earth.

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EaddyAcres t1_j2ahrop wrote

One of my teachers used to say a pint is a pound the whole world around. US pints not the UK 20oz

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Pocok5 t1_j2ajxdq wrote

> a pint is a pound the whole world around

> US pints not the UK

So that was a fucking lie.

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EaddyAcres t1_j2alj92 wrote

Blame the UK, cups-pints-quarts-gallons make sense over here.

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greatvaluemeeseeks t1_j2amtgv wrote

Sugar is significantly heaver than water though which would only increase the density of the cola.

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