Someone Help me please

Chemistry

1 answer:

Eddi Din [679]3 years ago

3 0

The answer is starch because iodine reacts with starch to change the colour to inky blue or black.
All the others are present in milk naturally so I’m assuming they intent starch

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Anettt [7]

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A: 60 hours

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3 years ago

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3 years ago

If the solubility of a gas in water is 1.22g/2.75 atm, what is it’s solubility (in g/L) at 1.0 atm

Slav-nsk [51]

Answer : The solubility of a gas in water at 1 atm pressure is, 0.4436 g/L

Solution : Given,

Solubility of a gas in water = 1.22 g/L (at 2.75 atm pressure)

At pressure = 1 atm, Solubility of a gas = ?

Now we have to calculate the solubility of a gas.

At 2.75 atm pressure, the solubility of a gas in water = 1.22 g/L

At 1 atm pressure, the solubility of a gas in water = $\frac{1atm}{2.75atm}\times 1.22g/L=0.4436g/L$

Therefore, the solubility of a gas in water at 1 atm pressure is, 0.4436 g/L

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3 years ago

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makkiz [27]

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4 years ago

How much heat is needed to raise the temperature of 7g of water by 18oC?

Oliga [24]

Specific heat of water, C = 4.18 J/g. °C
From question, Mass of water= 7g
Temperature difference = 180 degree Celsius

We know by formula,
Heat (Q)= c* m(mass) * T (change in temperature)
So, Q= 4.18 J/g. °C *7g * 180 °C
=5266.8 J

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4 years ago

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