CHEMISTRY HIGH SCHOOL

According to the cell theory, which of the following is NOT composed of cells?a- algae
b-iron
c- bacteria

Answers

Answer 1
Answer:

Answer:

Iron

Explanation:

cause i am big brain

Related Questions

Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.5 × 10^-4. Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.5 × 10^-4.
What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?
The same amount of force is applied to bowling balls one of the balls Waze 8 pounds and the other weighs 13 pounds which bowl will have a greater acceleration
A covalent bond forms a. when an element becomes a noble gas. b. when atoms share electrons. c. between metals and nonmetals. d. when electrons are transferred from one atom to another.
Cause and effect of local winds?

"Enzymes help to achieve the equilibrium faster but cannot changethe thermodynamic
equilibrium constant. Why?"

Answers

Equilibrium constant Kc is defined as the concentration of products over reactants raised to the the powers of its respective molar ratios in of the balanced chemical reaction.
A catalyst by definition is a compound able to catalyse a reaction while being chemically unchanged in the process. The catalyst works by lowering the activation energy by providing an alternative pathway of lower activation energy.
The is no value in the equation whereby activation energy will affect the equilibrium constant.
To know the speed where the reaction reaches equilibrium we need to look at the rate equation also known as Arrhenius equation,
K= Ae^(-Ea/RT)
Here we can see with the lowering of Ea ( activation energy ) the rate constant rises causing the reaction to reach equilibrium quicker.

Final answer:

Enzymes cannot change the thermodynamic equilibrium constant of a reaction because they do not alter the free energy difference between the reactants and products.

Explanation:

Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur. They achieve this by providing an alternative reaction pathway with a lower activation energy. However, enzymes cannot change the thermodynamic equilibrium constant of a reaction.

The thermodynamic equilibrium constant is a measure of the ratio of products to reactants at equilibrium. It is determined by the difference in free energy between the reactants and products. Enzymes, although they accelerate the rate at which equilibrium is reached, do not alter the free energy difference between the reactants and products. Therefore, they cannot change the equilibrium constant.

Learn more about enzymes and thermodynamic equilibrium here:

brainly.com/question/12947545

#SPJ14

What is the name of a molecule composed of one or more sugars?

Answers

Saccharides

Hope it helps!

Which of these elements has physical and chemical properties most similar to silicon (Si)?(1) germanium (Ge) (3) phosphorus (P)
(2) lead (Pb) (4) chlorine (Cl)

Answers

Answer: Option (1) and (2) are correct.

Explanation:

Elements which contain same number of valence electrons tend to show similar chemical properties. This is because having same number of valence electrons will make the atoms to react in a similar way.

For example, Silicon is a group 14 element. So, it contains only 4 valence electrons. Similarly, germanium and lead are group 14 elements and it has 4 valence electrons.

Therefore, silicon, germanium, and lead will have similar chemical properties.

Whereas phosphorous is a group 15 element, and chlorine is a group 17 element.

Thus, we can conclude that out of the given options germanium and lead elements has physical and chemical properties most similar to silicon (Si).
In order from most to least similar:
1. Germanium
2. Lead
3. Phosphorus
4. Chlorine
The elements in the same column as the element you have are the most similar. The rows are not. For example, though chlorine and magnesium are in the same row, they have very different properties, whereas chlorine and fluorine more similar

Metals experience plastic deformation when _____.

Answers

Metals experience plastic deformation when a specific amount of pressure and temperature is applied to them. Most metals have low specific heat. Because of their low specific heat, they easily get hot when heat is applied to them.

A 125 mL aqueous solution contains 1.86 mc032-1.jpg 10–5 g of potassium chloride and has a density of 1.02 g/mL. What is the concentration in ppm?

Answers

mass of the solvent (H2O) in kg

D = m / V

1.02 = m / 125

m = 1.02 x 125

m = 127.5 g of H2O

127.5 / 1000 => 0.1275 kg

mass of  solute in mg:

1000 x  ( 1.86 x 10⁻⁵ ) = 0.0186 mg

ppm = mass of solute in mg / mass of solvent in kg

ppm = 0.0186 / 0.1275

= 0.1458 ppm

hope this helps!

Answer:

C

Explanation:

Given the incomplete equation for the combustion of ethane:2C2H6 + 7O2==>4CO2 + 6 ____
What is the formula of the missing product?
(1) CH3OH (3) H2O
(2) HCOOH (4) H2O2

Answers

Answer : The correct option is, (4) (H_2O)

Explanation :

Combustion reaction : It is a reaction in which a hydrocarbon react with the oxygen gas to produces carbon dioxide as water as a products.

The given incomplete equation are :

2C_2H_6+7O_2\rightarrow 4CO_2+6_

In this equation, we see that a hydrocarbon and oxygen gas are present on reactant side and carbon dioxide are present on product side but water molecules are missing on the product side. So, we are adding water (H_2O) on missing side.

The given complete equation will be :

2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O

Therefore, the formula missing on product is,  (H_2O)
The combustion of ethane will consume oxygen and create carbon dioxide and water. That is a general rule for most alkane, olefin and alkyne. So the missing product is H2O.
Other Questions
Which one is stronger acid with ph=5 or ph=2
Converting carbon to nitrogen by increasing the number of protons from 6 to 7 and decreasing the number of neutrons from 8 to 7 is an example of what type of decay?
Torque can be calculated by multiplying the force (N) applied at 90∘ to the lever arm at a distance (m) from the pivot point (point of rotation), the compound SI unit for the torque is N⋅m. If the force (at 90∘ to the lever arm) applied is 15 N and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?
Write a complete reaction of succinic acid and acetic anhydride