All categories

3 years ago

How much heat is absorbed if 75.4 g of CO2 reacts?

Chemistry

2 answers:

iris [78.8K]3 years ago

7 0

Answer:

Explanation:

PSYCHO15rus [73]3 years ago

4 0

Answer:

−

389 kJ

You might be interested in

When 74.8g of alanine C3H7NO2 are dissolved in 1450.g of a certain mystery liquid X, the freezing point of the solution is 8.30°

dlinn [17]

Answer: The mass of potassium bromide that must be dissolved in the same mass of X to produce the same depression in freezing point is 58.2 grams

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=8.30^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte)

$K_f$ = freezing point constant =

m= molality = $\frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}=\frac{74.8g\times 1000}{1450g\times 89.09g/mol}=0.579$

$8.30^0C=1\times K_f\times 0.579$

$K_f=14.3^0C/m$

Let Mass of solute (KBr) = x g

$8.3^0C=1.72\times 14.3\times \frac{xg\times 1000}{119g/mol\times 1450g}$

$x=58.2g$

Thus the mass of potassium bromide that must be dissolved in the same mass of X to produce the same depression in freezing point is 58.2 grams

7 0

2 years ago

Can anyone pls help? (fill in the blank)

masya89 [10]

Answer:

reactivity:very reactive,less reactive

density:float in water,sink in water

melting and boiling point:low,high

colour of salts: colourless,often coloured

3 0

2 years ago

You open the fridge and the milk is sour (spoiled). What has

Sloan [31]

Pretty sure it’s a chemical change.

6 0

3 years ago

Read 2 more answers

What is the molar mass of NH4OH

MrMuchimi

Answer:

35.04 g\mol

Explanation:

5 0

3 years ago

Gametes combine in sexual reproduction that creates a fertilized egg that will turn into a ____________.

enyata [817]

Answer:

i assume that it would be a gametophyte.

Explanation:

6 0

3 years ago