Match the element to its oxidation number.
Sulfur

NOT 100% SURE

Thermal Energy..?

When I think of three states of matter I think of water as an example:

• Adding extreme heat to the liquid form of water can turn it into gas.

• Adding heat to ice can turn it into the liquid form of water.

• Freezing the liquid form of water can turn it into ice.

I would say temperature (thermal energy) has an effect of the different states of matter.

cholesterol is a steroid of fat and the primary sterol synthesised by animals, which are by far its primary natural source. Some types of cholesterol are good and necessary while others are harmful, and having high levels of them in your blood can lead to heart disease and clog your arteries.

Carbohydrates are saccharides, or sugars. They give animals energy. They are also necessary in moderate quantities, but consuming large quantities of refined simple carbohydrates is what makes people overweight.

Answer:

the letters

Explanation:

Answer:

The correct options are:

B. The HCl is the solute.

D. The H₂O is the solvent.

E. This mixture conducts electricity.

Explanation:

For the preparation of the HCl solution, 10 mL of HCl and 40 mL of water were mixed.

The compound that is present in the solution in a smaller ratio is the solute and the other compount -present in higher ratio- is the solvent.

So, the solute is HCl and the solvent is water (H₂O). Furthermore, water is considered as an universal solvent (for most of the polar and ionic compounds).  According to this, the following options are correct:

B. The HCl is the solute.

D. The H₂O is the solvent.

Then, a condition for a solution that is able to conduct electricity is the presence of ions in the solution. When HCl is dissolved in water, it dissociates in ions according to the following equilibrium:

HCl ⇔ H⁺ + Cl⁻

The ions H⁺ and Cl⁻ are electrically charged so the solution can conduct electricity. According to this, the following option is also correct:

E. This mixture conducts electricity.

Answer:

280 electrons

Explanation:

The number of electrons in each energy level are determine by using following formula:

2n²

Here "n' is the energy level. we will put the energy level number in place of "n" and number of electrons will easily found.

Principle energy levels                        number of electrons

             1                                                     2n² = 2(1)²= 2

             2                                                     2n² = 2(2)²= 8                                    

             3                                                     2n² = 2(3)²= 18

             4                                                     2n² = 2(4)²= 32

             5                                                     2n² = 2(5)²= 50

             6                                                     2n² = 2(6)²= 72

             7                                                      2n² = 2(7)²= 98

So the total number of electrons in first seven energy levels will be the sum of the number of electrons in each energy levels.

2+8+18+32+50+72+98 = 280 electrons