What is the ph of a saturated solution of aluminum hydroxide?

How many moles of carbon are in a sample of 21.45 moles of heptane(C7H16)???????

saw5 [17]

The moles of carbon that are in the sample of 21.45 moles of heptane(C₇H₁₆) is 150.15 moles

calculation

moles of carbon = moles of heptane × number of C atom

number of C atom in heptane = 1 ×7 = 7 atoms

moles is therefore = 21.45 moles × 7 =150.15 moles

3 0

3 years ago

Read 2 more answers

Consider the reaction. CaCl2(aq)+K2CO3(aq)⟶CaCO3+2KCl. Identify the precipitate, or lack thereof, for the reaction. (A) KCl (B)

Natali5045456 [20]

Answer: The correct answer is Option B.

Explanation:

Precipitate is defined as insoluble solid substance that emerges when two different aqueous solutions are mixed together. It usually settles down at the bottom of the solution after sometime.

For the given chemical equation:

$CaCl_2(aq.)+K_2CO_3(aq.)\rightarrow CaCO_3(s)+2KCl(aq.)$

The products formed in the reaction are calcium carbonate and potassium chloride. Out of the two products, one of them is insoluble which is calcium carbonate. Thus, it is considered as a precipitate.

Hence, the correct answer is Option B.

4 0

4 years ago

What kind of energy form is the name for the kinetic energy that all particles have?

galben [10]

Answer: Kinetic energy is energy that is associated with the constant movement of atoms or molecules. Kinetic energy is also called thermal energy, it is a form of motion. It is the motion of waves, electrons, atoms, molecules, substances, and objects!

Hope this helps a little bit

4 0

4 years ago

What other missions had been to Mars, and what did they accomplish?

lesya692 [45]

Answer:

they stayed alive?

Explanation:

easy

5 0

2 years ago

Read 2 more answers

Why are pure liquids and solids not included in the reaction quotient or the equilibrium constant expression for a given heterog

AfilCa [17]

Pure liquids and solids at the equilibrium stage:

Pure solids and pure liquids are not included in expressions for the equilibrium constant of heterogeneous equilibria since their concentrations are constant across time. Therefore, including it in our equilibrium expression is not significant.

Equilibrium expression:

When a certain chemical reaction is in equilibrium, the rates of the forward and backward reactions are equal, which means that there is no net change in the concentrations of the reactants and products and that the reaction mixture's composition does not change.

The concentration of solid and liquid:

Solid or liquid concentration,

= No. of Moles/ Volume in L

= Mass/(Volume × molar mass)

= Density/ Molar mass

Pure solids and liquids have constant densities and molar masses at a constant temperature.

Because of this, they have constant molar concentrations, which means that they are not considered in the equilibrium constant for a heterogeneous reaction.

Learn more about the pure solids, liquids, and heterogenous mixture here,

brainly.com/question/1811148

#SPJ4

3 0

2 years ago