Help Plz 20 points -------------

Answer:

In the atmosphere carbon is found as carbon dioxide

Explanation:

Answer:

Yes. u can because its easy to tell if an item will sink or float usually by the weight or the width

Explanation:

Answer:

b) stoichiometry

Explanation:

Stoichiometry is the study of quantitative relationships between the amounts of reactants and products.

Explanation:

A reaction with another element

other choices are physical property

Answer:

A. reaction with another element

We are given:

Mass of Na added = 4.35 grams

Mass of water = 105 grams

Mass Percent of Na:

Total mass of the solution = mass of solute + mass of solvent

Total mass of the solution = 4.35 + 105 = 109.35 grams

Mass percent of solute = (mass of solute / mass of solution) * 100

Mass percent of Solute = (4.35 / 109.35) * 100

Mass percent = 3.978 %

Answer:

velocity

Explanation:

The definition of acceleration is: Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

Answer: I saw the other question with screen shot Thanks

4. Answer, Like gases, plasmas have no fixed shape or volume, and are less dense than solids or liquids. But unlike ordinary gases, plasmas are made up of atoms in which some or all of the electrons have been stripped away and positively charged nuclei, called ions, roam freely.

5. Answer The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy. Another example of kinetic energy is the energy associated with the constant, random bouncing of atoms or molecules.

6.Answer is solid

Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.

7. Answer Water behaves differently to most other substances because, in its solid state (ice), its particles are less densely packed than in its liquid state. This is why ice floats.

8. Answer 212 degrees F.

Sea Level: Water boils at 212 degrees F. and simmers at 190 degrees F.

9. Answer When an object is heated the motion of the particles increases as the particles become more energetic. If it is cooled the motion of the particles decreases as they lose energy.

10. Answer CHEMISTRY TERM                            PHASE CHANGE

Fusion/Melting Freezing Vaporization/Boilin    Condensation Sublimation Deposition                                                            Solid to a Liquid Liquid to a Solid Liquid to a Gas Gas to a Liquid Solid to a Gas Gas to a Solid

11.  Answer is Energy is consumed (endothermic) to melt ice (solid to liquid) so the opposite process (liquid to solid) must be exothermic.

12.In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.

ok alright. But where’s the question?

Answer:

76.5 grams

Explanation:

Solubility of sodium chloride = [tex]\dfrac{30.6}{100}=0.306\ \text{g/mL}[/tex]

Now volume of water is 250 mL

We have to find the amount of NaCl that can be dissolved in the above mentioned amount of water

Let the mass of NaCl that can be dissolved be m so

[tex]\dfrac{m}{250}=0.306\\\Rightarrow m=250\times0.306\\\Rightarrow m=76.5\ \text{g}[/tex]

The mass of NaCl that can be dissolved is 76.5 grams.