CHEMISTRY MIDDLE SCHOOL

What is the purpose of the plasma membrane?

Answers

Answer 1
Answer: An outer layering of a cell that manages what goes in and out.
Answer 2
Answer: Plasma membrane is a biological membrane that separates the interior of all cells from the outside environment.

Related Questions

when you pass the foodstall you can smell what is cooking , explain why this happen by particle theory
EADY QUESTION WORTH 50PTS
Is boiling water a chemical reaction?
Which definition is correct
Name at least three types of energy associated with the microwave

Balance the chemical equation. ___Mg + ___Fe2O^3 -> ___MgO + ___Fe

Answers

Answer:

3Mg + Fe₂O₃ → 3MgO + 2Fe.

Explanation:

  • To balance the equation, you should apply the law of conservation of mass for the equations.
  • The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
  • The balanced equation is:

3Mg + Fe₂O₃ → 3MgO + 2Fe.

That 3.0 mole of Mg react with 1.0 mole of Fe₂O₃ to produce 3.0 moles of MgO and 2.0 moles of Fe.

  • The no. of all atoms is the same in both of reactants and products side.

Mg (3), Fe (2), and O (3).

What is the same between mass and weight

Answers

Answer:

Mass is how much matter an object has. Weight is how much gravity an object is being acted upon.

Explanation:

The mass of an object will stay the same no matter where you place it. But if you were to place the object, in the moon for example, then the weight of the object would be less since there is less gravity on the moon.

Given the balanced equation representing a reaction:O2 --> O + O
What occurs during this reaction?
(1) Energy is absorbed as bonds are broken.

(2) Energy is absorbed as bonds are formed.

(3) Energy is released as bonds are broken.

(4) Energy is released as bonds arc formed.

Answers

In the equation given above, a molecule of oxygen breaks into two atoms of oxygen showing that the bond is being broken. When bonds break, energy is absorbed and when bonds are formed energy is released. Hence, the answer to this question is (1).

Which one of these is an element carbon carbon dioxide air water

Answers

carbon is an element.
Carbon dioxide is a compound
air is a mixture
water can be both a compound/mixture depending on the type

A sentence for physical weathering

Answers

Physical weathering can lead to the beginning of the erosion process.
physical weathering is a process of decay disintgration and decomposition brought about by environmental changes like running water moving ice wind etc

Please help!!!! A group of students is studying convection currents. They fill two identical balloons with the same amount of helium. One balloon is placed in a freezer and the other in an area with warm air. After 10 minutes, the balloons are released from a height of 1 meter. Which of the following do the students most likely observe? A. The balloons both rise. The cold balloon is larger than the warm balloon.


B. The balloons rise at the same rate. Both balloons are the same size.


C. The warm balloon expands and rises. The cold balloon shrinks and sinks.


D. The cold balloon expands and rises. The warm balloon shrinks and sinks.

Answers

The correct answer is option C, that is, the warm balloon expands and rises, and the cold balloon shrinks and sinks.

It is known from the ideal gas equation, that PV = nRT

Here, P is pressure, V is volume, n is the number of atoms in gas, R is gas constant, and T is temperature.

From the equation, it is clear that the volume of balloon is directly proportional to the temperature. It signifies that at constant pressure when temperature elevates than at that time volume of the balloon will increase and when temperature reduces the volume of balloon will decrease.

Thus, the volume of warm balloon will increase because of which its density increases and it can rises easily as a less dense substance can easily rises in air in comparison to more dense gas or substance. Thus, the cold balloon shrinks and sinks.

Other Questions
Which of the following is a element water,oxygen, carbon dioxide ammonia
What is the difference between a"characteristic” and a “trait"? Give an example ofeach.
Why don’t water and oil mix when the two liquids are poured into the same container?
Given the following reaction: 2 OF2 + 2 S → SO2 + SF4 + 319.5 kJ Is this endothermic or exothermic? Draw the energy pathway: