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tigry1 [53]
3 years ago
5

You have two samples, one is calcite and the other is halite.

Chemistry
1 answer:
beks73 [17]3 years ago
4 0

Answer:

c

Explanation:

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CaCO3 + 2HCl --> CaCl2 + CO2 + H2O In the reaction above, what mass of carbon dioxide is produced when 10 moles of HCl reacts
puteri [66]
According to the stoichiometry the CO2 formed is 1/2 the moles of H2O. So take the moles of CO2 as 5moles.

n=m/M

Where :

n = mole

m = mass

M = molar mass

Molar mass of CO2 = 44gmol^-1

Therefore mass = 5mol× 44gmol^-1= 220g
4 0
4 years ago
45.5 g of ice is heated from -25 degrees celsius to 150 degrees celcius. Calculate the total amount of heat required for the ent
tino4ka555 [31]

Answer:

Q = 16163.88 Joules

Explanation:

Given the following data;

Initial temperature, T1 = -25°C

Final temperature, T2 = 150°C

Mass = 45.5 g

Specific heat capacity of ice = 2.03 J/g°C

To find the quantity of heat required;

Heat capacity is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 150 - (-25)

dt = 150 + 25

dt = 175°C

Substituting into the formula, we have;

Q = 45.5 * 2.03 * 175

Q = 16163.88 Joules

4 0
3 years ago
Which best describes how water's movement affects landforms? Select one 0 Mechanical weathering by water causes rock to break do
Diano4ka-milaya [45]

Answer:

......................................................................................................

I..............

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know.............

sorry..........

>-<

Explanation:

4 0
3 years ago
Consider the following reaction, which is spontaneous at room temperature. C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) Is ΔS positive o
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Answer:

∆H = negative and ∆S = positive.

Explanation:

The reaction given in the question is spontaneous at room temperature ,

hence ,

The the gibbs free energy , i.e. ,∆G will be negative for  spontaneous reaction

According to the formula ,

∆G = ∆H -T∆S

The value of ∆G can be negative , if  ∆H has a negative value and  ∆S has a positive value , because , T∆S  , has a negative sign .

Hence , the answer will be , ∆H = negative and ∆S = positive.

3 0
3 years ago
Which of the following best describes an object that is accelerating? *
Flauer [41]

Answer:

a soccer ball travels at 3m/s

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3 years ago
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