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2 years ago

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Chemistry

1 answer:

Effectus [21]2 years ago

4 0

Answer:

There are 5! goodluck,

Explanation:

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Atomic weight and atomic number of an element is 35 and 17 respectively

mart [117]

Chlorine.

Chlorine is the 17th element and has a mass of 35.

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3 years ago

3. Define isobar 75 points

steposvetlana [31]

Answer:

meteorology A line drawn on a map or chart connecting places of equal or constant pressure.

nuclear physics Either of two nuclides of different elements having the same mass number.

thermodynamics A set of points or conditions at constant pressure.

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3 years ago

How is conductivity related to pH?

timama [110]

Answer:

Strongly acidic [or strongly basic] solution will have high conductivity.

Explanation:

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3 years ago

Read 2 more answers

A 20.0 g piece of a metal is heated and place into a calorimeter containing 250.0 g of water initially at 25.0 oC. The final tem

BartSMP [9]

Answer:

$Q_{metal} = -6799\,J$

Explanation:

By the First Law of Thermodynamics, the piece of metal and water reaches thermal equilibrium when water receives heat from the piece of metal. Then:

$Q_{metal} = - Q_{w}$

$Q_{metal} = m_{w} \cdot c_{p,w}\cdot (T_{1}-T_{2})$

$Q_{metal} = (250\,g)\cdot \left(4.184\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot (25\,^{\textdegree}C - 31.5\,^{\textdegree}C)$

$Q_{metal} = -6799\,J$

6 0

3 years ago

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A sample of krypton gas with a volume of 10.00 L has a temp of 303 K and exerts

marshall27 [118]

Answer: The final volume will be 14.85 L.

Explanation:

To calculate the final volume when temperature increases, we use Charles' Law.

This law states that volume is directly proportional to the temperature of the gas if number of moles and pressure remains constant.

$V\propto T\\\\\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ = Initial volume and temperature

$V_2\text{ and }T_2$ = Final volume and temperature

We are given:

$V_1=10L\\
T_1=303K\\
V_2=?L\\
T_2=450K$

Putting values in above equation, we get:

$\frac{10L}{303K}=\frac{V_2}{450K}$

$V_2=14.85L$

Hence, the final volume of the gas is 14.85L

7 0

3 years ago