What is the total number of atoms in l.0 mole of CO?

77 grams of an unknown metal at 99ᵒC is placed in 225 grams of water which is initially at 22ᵒC. The water is inside a 44 gram a

BigorU [14]

Answer:

The specific heat capacity of the unknown metal is C = 0.6991 J/g°C = 0.1671 cal/g°C

Explanation:

Heat lost by the unknown metal is equal to the heat gained by the water and aluminium cup.

Given,

Mass of unknown metal = 77 g

Initial Temperature of unknown metal = 99°C

Mass of water = 225 g

Initial Temperature of water = 22°C

Mass of Aluminium cup = 44 g

Specific heat capacity of Aluminium cup = 0.22 cal/gᵒC = 0.92048 J/g°C

Final temperature of the setup = 26°C

Note that, specific heat capacity of water = 4.186 J/g°C

Let the specific heat of the unknown metal be C

Heat lost from the unknown metal

= (77)(C)(99 - 26) = (5,621C) J

Heat gained by water

= (225)(4.186)(26 - 22) = 3,767.4 J

Heat gained by Aluminium cup

= (44)(0.92048)(26 - 22) = 162.00448 J

Heat lost by unknown metal = (Heat gained by water) + (Heat gained by Aluminium cup)

5621C = 3,767.4 + 162.00448 = 3,929.40448

5621C = 3,929.40448

C = (3,929.40448 ÷ 5621) = 0.6991 J/g°C

C = 0.6991 J/g°C = 0.1671 cal/g°C

Hope this Helps!!!

6 0

2 years ago

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Which of the following statements explains how temperature affects the rate of a reaction ? (5 points ) When temperature decreas

harkovskaia [24]

Answer:

As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.

Explanation:

As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.

3 0

2 years ago

A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon. sort the conditions based on the ga

Anettt [7]

A. Bin 3
B. Bin 1 Nitrogen has a smaller molecular weight and will effuse at a faster rate. 
C. Bin 3. If the gases are at the same temperature, they have the same average kinetic energy. 
D. Bin 1. Nitrogen has a greater average velocity since it is a lighter gas.

4 0

2 years ago

34 grams of chlorine gas react with sodium to form how many grams of sodium chloride? 2 na + cl2 --> 2 nacl

mr Goodwill [35]

Hello!

The balanced chemical equation for the reaction between sodium and chlorine is the following:

2Na + Cl₂ → 2NaCl

To know the mass of Sodium Chloride produced, we are going to use the following conversion factor to go from grams of Chlorine gas to grams of Sodium Chloride:

$34gCl_2* \frac{1 mol Cl_2}{70,9060 g Cl_2} * \frac{2 moles NaCl}{1 mol Cl_2}* \frac{58,4 g NaCl}{1 mol NaCl}=56,007 g NaCl$

So, 56,007 g of NaCl are produced

Have a nice day!

5 0

2 years ago

Which is the formula mass of Na2SO4? answers are 119.06 amu125.98 amu142.05 amu174.12 amu

ASHA 777 [7]

Formula mass of Na2SO4 = 2 x atomic mass of Na + atomic mass of S + 4 x atomic mass of O.

= 2x22.99 + 32.065 + 4x15.999
= 142.041
~ 142.05 amu

Hope this helps!

7 0

2 years ago

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