Alkali metal hydroxides can be used to test the identity of metals in certain salts. The colour of the precipitate will help identify the metal : Calcium hydroxide is soluble; no precipitate is formed.

6 0

3 years ago

How many significant figures are in 0.00102?

zaharov [31]

Answer:

Explanation:

102 are significant figures

7 0

2 years ago

Read 2 more answers

Fill in the missing piece of the table

djyliett [7]

Answer: The final volume $V_2$ is 263.09 ml

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=156ml\\T_1=215^oC=(215+273)K=488K\\V_2=?\\T_2=550^0C=(550+273)K=823K$

Putting values in above equation, we get:

$\frac{156}{488}=\frac{V_2}{823}\\\\V_2=263.09ml$

Thus final volume $V_2$ is 263.09 ml

5 0

3 years ago

What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.2

Nadya [2.5K]

This is an application of osmotic pressure which is one of the colligative properties of substances. The formula of osmotic pressure is expressed as P = MRT where M is molarity , R is the gas constant and T is temperature. When M is equal to a total of 0.305 M and T is equal to 298 K , P should be equal to 7.46 atm

3 0

4 years ago