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Orlov [11]
3 years ago
6

_Cl2 + _NaBr → _NaCl + _Br2 Answer: 1,2,2,1

Chemistry
1 answer:
nlexa [21]3 years ago
4 0
1 2 2 1 is the answer so u are correct
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A sample of copper absorbs 4.31E+1 kJ of heat, resulting in a temperature rise of 6.71E+1 °C. Determine the mass (in kg) of the
olga2289 [7]

Answer: 1.67 kg

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed=4.31\times 10^1kJ = 43100J   (1kJ=1000J)

m= mass of substance = ?

c = specific heat capacity = 0.385J/g^0C

Change in temperature ,\Delta T=T_f-T_i=6.71\times 10^1^0C=67.1^0C

Putting in the values, we get:

43100J=m\times 0.385J/g^0C\times 67.1^0C

m=1670g=1.67kg   (1kg=1000g)

Thus the mass (in kg) of the copper sample is 1.67

3 0
3 years ago
Convert 0.54 km to dm
Kaylis [27]

.54 km to dm is 5,400 decimeters. Hope this helps, have a BLESSED day! :-)

6 0
2 years ago
Which milligram quantity contains a total of four significant figures
denis23 [38]
D has a total of four significant figures.
7 0
2 years ago
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How many liters of CO2 are formed when 14.0 g of CaCO3 react at 1.00 atm and 1000K
Gnesinka [82]

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Explanation:

7 0
3 years ago
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25. Which answer best describes the continental rise? area of land that drops toward deep ocean basins 75 mile shallow flat area
Hatshy [7]

Answer:

Thick deposits of sediments carried off of the shelf  

Explanation:

The continental rise is a thick deposit of sediments that accumulate between the continental slope and the abyssal plain

A is wrong. The area of land that drops toward the deep ocean basins is the continental slope.

B is wrong. The 75-mile shallow flat area just off coastlines is the continental shelf.

D is wrong. The surf area along coastlines is the surf zone .

 

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