3 years ago

An object has a density of 40 g/cm3 and a mass of 240 g what is it’s volume

Chemistry

1 answer:

Scilla [17]3 years ago

8 0

Answer:

6cm^3

Explanation:

240/40=6

6 cm^3

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98 grams of potassium chloride are added to 217 grams of water. The volume of the water is 200 cm3. When the water reaches satur

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Answer: -

236 g

Explanation: -

Solubility of KCl = 95 g/ dm³

Volume of the water = 200 cm³ = $\frac{200}{1000}$ = 0.2 dm³

Amount of KCl dissolved = Volume of the water x Solubility

= 0.2 dm³ x 95 g/ dm³

= 19 g

Mass of water taken = 217 g

Total mass of solution = Mass of water + Amount of KCl dissolved

= 217 g + 19 g

= 236 g

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Explanation:

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3 years ago

12500 J/ (106 g) (4C) reduce to one

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The given expression is $\frac{12500 J}{(106g)(4^{0}C )}$

This expression denotes the specific heat of a substance which indicates a heat energy of 12500 J is involved in raising the temperature of 106 g of the substance by $4^{0}C$ . Generally, the units of specific heat are $\frac{J}{g.^{0}C }$

$\frac{12500 J}{(106g)(4^{0}C )}$ = $\frac{12500 J}{(106g)(4^{0}C } = 29.5 \frac{J}{g^{0}C }$

Therefore, $\frac{12500 J}{(106g)(4^{0}C )}$ when reduced to one unit will be 29.5 $\frac{J}{g^{0}C }$

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The number of seismograph needed is three

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Answer:

koh

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kOh has a ph level of 10.89

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