For the decomposition of phosphorous pentachloride to phosphorous trichloride and chlorine at 400K the KC is 1.1x10-2. Given tha

According to the sign convention, a negative Δ indicates that the reaction is exothermic, resulting in a loss of heat and a reduction in temperature.

Answer:

B. Apex provides more channels per dollar compared to certain other streaming platforms.

Explanation:

Just completed the Quiz on Edgenuity.

Answer:

The mass of copper generated is 19.07g

Explanation:

Let's write out the chemical equation;

3CuCl2 + 2Al → 2AlCl3 + 3Cu

3:   2:   2: 3

After confirming that the reaction is balanced, we can continue.

The problem asks for the mass of Cu produced from 5.4g of Al reacting.

Based on the equation, what is the relation between Al and Cu?

2 moles of Al would yield 3 moles of Cu

Expressing this in mass terms, we find;

mass = number of moles * molar mass

Mass of Aluminium = 2 * 26.98 = 53.98 g

Mass of Copper = 3 * 63.546 = 190.638g

This indicates that;

53.98 g of Al would react to create 190.638g of Cu

So, how much Cu would result from 5.4 g of Al?

This leads us to;

53.98 = 190.638

5.4 = x

By cross multiplication, we determine;

x = (190.638 * 5.4) / 53.98

x = 19.07 g

The mass of copper created is 19.07g

Answer:

A) The molecular formula for ibuprofen is

B) The molecular formula for Cadaverine is

C) The molecular formula for Epinephrine is

Explanation:

Element percentage in a compound:

A) The composition of ibuprofen, used for headaches, consists of 75.69% carbon, 8.80% hydrogen, and 15.51% oxygen by weight.

Ibuprofen has a molar mass of 206 g/mol.

The proposed molecular formula for ibuprofen is =

Count of carbon atoms in one ibuprofen molecule;

Count of hydrogen atoms in one ibuprofen molecule;

Count of oxygen atoms in one ibuprofen molecule;

Molecular formula for ibuprofen:

=

B) Cadaverine consists of 58.55% carbon, 13.81% hydrogen, and 27.40% nitrogen by weight

Cadaverine has a molar mass of 102.2 g/mol.

The proposed molecular formula for Cadaverine is =

Count of carbon atoms in one Cadaverine molecule;

Count of hydrogen atoms in one Cadaverine molecule;

Count of nitrogen atoms in one Cadaverine molecule;

Molecular formula for Cadaverine:

=

C) Epinephrine includes 59.0% carbon, 7.1% hydrogen, 26.2% oxygen, and 7.7% nitrogen by weight

Epinephrine has a molar mass of 180 g/mol.

The proposed molecular formula for Epinephrine is =

Count of carbon atoms in one Epinephrine molecule;

Count of hydrogen atoms in one Epinephrine molecule;

Count of oxygen atoms in one Epinephrine molecule;

Count of nitrogen atoms in one Epinephrine molecule;

Molecular formula for Epinephrine:

=

Density is defined as the "mass per unit volume" of an object.

Thus, for an object weighing 100 grams with a volume of 100 milliliters, the density calculates to 100 grams / 100 ml.

When weighing the object, if there is water on the scale's surface, it will contribute additional weight, making the object seem heavier than its actual mass. Consequently, you might mistakenly conclude that the density is GREATER than it truly is.

For instance, if there were 5 ml of water on the scale, with water's density being 1 gram per milliliter (1 g/ml), it would add 5 grams to the object's weight. Using the previous example, the object's mass appears as 105 grams instead of 100 grams. Thus, you would calculate:

density = mass / volume
density = 105 grams / 100 ml
density = 1.05 g/ml

Thus, the effect on density would be to misleadingly suggest it is greater.

I hope this is helpful!

Best of luck