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3 years ago

We can use a chart called the __ to find information about all the elements

Chemistry

2 answers:

lions [1.4K]3 years ago

8 0

THE ANSWER SHOULD BE THE PERIODIC TABLE I THINK

maks197457 [2]3 years ago

6 0

Answer:

periodic table

Explanation:

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A sealed balloon occupies a volume of 250 mL at an unknown temperature. When the temperature is altered to 30 C, the balloon's v

Allushta [10]

Answer:

Initial temperature, T1 = 15°C

Explanation:

Given the following data;

Initial volume, V1 = 250 mL to Liters = 250/1000 = 0.25 L

Final temperature, T2 = 30°C

Final volume, V2 = 0.5 L

To find the initial temperature T1, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

$\frac {V}{T} = K$

$\frac{V1}{T1} = \frac{V2}{T2}$

Making T1 the subject of formula, we have;

$T_{1}= \frac{V_{1}}{V_{2}} * T_{2}$

Substituting into the formula, we have;

$T_{1}= \frac{0.25}{0.5} * 30$

$T_{1}= 0.5 * 30$

<em>Initial temperature, T1 = 15°C</em>

6 0

3 years ago

A gas has a volume of 4 liters at 50 oC. What will its volume be (in liters) at 100oC

san4es73 [151]

Answer:

The volume of the gas at 100°C is 4.6189 liters.

Explanation:

For this problem we are going to use Charles' law. Charles' law states that the volume is directly proportional to temperature given that the pressure is constant. In order to use the equation, the unit of temperature should be in Kelvin.

The working equation is:

where V1 and T1 are the initial volume and temperature while V2 and T2 are the final conditions.

Let us convert first the temperatures before solving for the final volume.

To convert Celsius to Kelvin just add 273.15 to temperature in Celsius.

50°C + 273.15 = 323.15 K

100°C + 273.15 = 373.15 K

Solving for the final volume:

V₂ =

V₂ = 4.6189 L

Therefore the final volume of the gas at 100°C is 4.6189 L.

Explanation:

5 0

3 years ago

What is the driving force for the reaction of HCl(aq) and NaOH(aq)?

Andru [333]

HCl and NaOH react based on the following equation:
HCl + NaOH ..............> NaCl + H2O

This reaction is known as a double replacement reaction. In this types of reactions, the electrolyte (and the solvent) is water and the driving force is mainly the formation of a non-electrolyte produce.

Based on this, the driving force in the above neutralization reaction is the formation if the non-electrolyte salt (NaCl)

8 0

3 years ago

How much energy is transferred when 30.0<br> g of water is cooled from 25.0 °C to 12.7 °C.

enot [183]

Answer:

Heat transferred, Q = 1542.42 J

Explanation:

Given that,

Mass of water, m = 30 grams

Initial temperature, $T_i=25^{\circ} C$