11.39g PbCl2(s) 200.0 ML<br> Solve for m

Which practice is an unsustainable way of managing resources?

Sergeeva-Olga [200]

Explanation:

Unsustainable way of managing resources means using resources in an unjustifiable manner, using without keeping in the needs for future generations. That is disobeying the principles of sustainability.

For examples release of toxic industrial wastes in rivers and thus, polluting it. Or, Deforestation of land for agricultural or industrial purposes. Thus, reducing the oxygen carrying capacity of Earth.

7 0

3 years ago

A) Calculate the theoretical yield of your product. The theoretical yield should be quoted as a mass, not a number of moles. Uni

Afina-wow [57]

Answer:

See explanation below

Explanation:

First, we need to know the formula of the carvone, which is C₁₀H₁₄O (MM = 150.2 g/mol) and the product which is C₁₀H₁₄O₂ (MM = 166.2 g/mol).

a) We have the initial mass of carvone which is 0.709 g. With this mass, and assuming a mole ratio of 1:1, we can calculate the theorical moles of the product:

C₁₀H₁₄O + HOOH -------> C₁₀H₁₄O₂ + H₂O

Let's calculate the moles of carvone:

n = m/MM

n = 0.709/150.2 = 4.72x10⁻³ moles

As we stated before, we have a 1:1 mole ratio, so the moles of carvone will be the mole of the products, so the moles of the carvone epoxide are 4.72x10⁻³ moles. To get the theorical yield, we just use the molecular mass of the carvone epoxide:

m = 4.72x10⁻³ * 166.2 = 0.784 g

This would be the theorical yield of the product

b) To get the percent of yield, we use the mass of the theorical yield and the actual mass obtained in the experiment:

%yield = exp yield / theo yield * 100

Replacing:

%yield = 0.519/0.784 * 100

%yield = 66.2 %

c) to get the atom economy, we just apply the following expression:

%AE = MM of desired product / MM of reactants * 100

In this case we already have the molecular mass of the product and one reactant. We only need to know the molecular mass of the HOOH which is 34 g/mol. Applying the formula we have:

%AE = 166.2 / (150.2+34) * 100

%AE = 90.2%

6 0

3 years ago

What is the oxidation state of S in so ??

Marina86 [1]

Answer:

+2

Explanation:

If a compound $SO$ existed, we would identify the oxidation state of sulfur using the following logic:

oxygen is more electronegative than sulfur, so it's more electron-withdrawing and it should have a negative oxidation state producing a positive oxidation state for sulfur;
oxygen typically has an oxidation state of -2;
we may then apply the fact that SO is expected to be a molecule with a net charge of 0;
if the net charge is 0 and the oxidation state of oxygen is -2, we may set the oxidation state of S to x;
write the equation for the net charge of 0 by adding all individual charges of the two atoms: $x + (-2) = 0$ ;
hence, x = 2.

That said, in this hypothetical compound S would have an oxidation state of +2.

6 0

3 years ago

Based on what you have read about wind turbines and dams, how does a generator work? A loop of Answer spins in a Answer field, p

vazorg [7]

Based on what you have read about wind turbines and dams, how does a generator work? A loop of ______ spins in a ______ field, producing ______ current.

Answer:

Wire

Magnetic

Electric

Explanation:

The generator works on the principle of converting mechanical energy into electrical energy.

For example in a wind turbine generator, the mechanical energy is the wind that pushes the blades of the turbine directly that leads to conversion of this it's linear motion to the rotary motion required to make rotor of the generator to spin. Finally, the harder the wind pushes, the more the mechanical energy applied and consequently, the more electrical energy can be generated.

Now, all generators work because of the effect of the magnetic field moving past an electrical coil.

Thus, the movement of a magnet across a single loop of wire produces a voltage that is induced within the wire loop as a result of the magnetic field produced by the magnet.

As a voltage is induced across the wire loop, electrons begin to flow around the loop thereby generating electric current.

8 0

3 years ago

How many significant numbers are in 50 ?

zalisa [80]

Answer:

4 significant numbers

Explanation:

there are 4 significant figures in 50.00 . The zeros in this number are trailing zeros in a number that has a decimal point.

4 0

4 years ago

11.39g PbCl2(s) 200.0 ML Solve for m