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3 years ago

Isaac pour the remaining chemical into the sink and apparatus were left in the sink

2 answers:

8 0

This is not a good idea u never know what the chemicals could do when in contact with metal or pipes or even water. always ask your chem teacher and make sure they tell u before. also alert them if this has happened because they can alert the school and act as needed

skelet666 [1.2K]3 years ago

3 0

Answer:

That's a major lab mistake! Never pour chemicals in sink unless otherwise stated by the lab instructor. They should go in a properly labelled waste jar or similar container. Apparatus should not be left in sink, it should be washed and cleaned, and returned to where it came from.

Explanation:

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2Na + 2H2O → 2NaOH + H2 During a laboratory experiment, a certain quantity of sodium metal reacted with water to produce sodium

anyanavicka [17]

Answer : The initial quantity of sodium metal used is 17.25 grams.

Solution : Given,

Volume of $H_2$ gas = 8.40 L

Molar mass of Na metal = 23 g/mole

The Net balanced chemical reaction is,

$2Na+2H_2O\rightarrow 2NaOH+H_2$

At STP, 22.4 L of volume is occupied by 1 mole of $H_2$ gas

so, 8.40 L of volume is occupied by = $\frac{8.40L\times 1mole}{22.4L}$ = 0.375 moles of $H_2$ gas

Now from the above reaction, we conclude that

1 mole of $H_2$ gas produced by the 2 moles of Na metal

0.375 moles of $H_2$ gas produced = $\frac{2moles\times 0.375mole}{1mole}=0.75moles$ of Na metal

The quantity of Na metal used = Moles of Na metal × Molar mass of Na metal = 0.75 moles × 23 g/mole = 17.25 grams

Therefore, the initial quantity of sodium metal used is 17.25 grams.

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3 years ago

What would happen if Phosphorus disappeared?

ololo11 [35]

The cycles would eventually come to an end. If the sun were to burn out, the Earth would lose the energy and heat from the sun and soon lose its own heat and energy and fall apart into space. The magnetism would soon become demagnetized, plates would stop moving, trees would die, life etc. no more O2, CO2, cycle and all others would fade.

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3 years ago

How many unpaired electrons would you expect for the complex ion: [fe(nh3)6]2+?

GarryVolchara [31]

The N from NH3 forms a coordinate covalent bond with the metal iron as in this case. The iron itself is at the "center" of the ligate complex ion. Since the net ionic charge is at 2+, it can be said that there is one pair of unpaired electrons for [fe(nh3)6]2+.

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3 years ago

Read 2 more answers

Suppose two 200.0-L tanks are to be filled separately with the gases helium and hydrogen. What mass of each gas is needed to pro

Aneli [31]

Answer:

Mass of helium = 4426.9524 g

Mass of hydrogen gas = 2213.4762 g

Explanation:

Pressure = 135 atm

Temperature = 24 °C

Volume = 200 L

Number of moles = ?

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T₁ = (24 + 273.15) K = 297.15 K

Using ideal gas equation as:

PV=nRT

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

135 atm × 200 L = n × 0.0821 L.atm/K.mol × 297.15 K

⇒n = 1106.7381 moles

For helium gas:

Molar mass = 4 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$1106.7381= \frac{Mass}{4}$

$Mass= 4426.9524\ g$

For hydrogen gas:

Molar mass = 2 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$1106.7381= \frac{Mass}{2}$

$Mass= 2213.4762\ g$

4 0

3 years ago

What is the pH of a solution whose [H⁺] is 2.7 x 10⁻⁴ M?

Firdavs [7]

Answer:

Here is the solution..Hope it helps:)

3 0

2 years ago

Isaac pour the remaining chemical into the sink and apparatus were left in the sink​

Isaac pour the remaining chemical into the sink and apparatus were left in the sink