100. mL of a gas are obtained from a reaction at 300.⁰C. What volume will the gas occupy at 100.⁰C?
The new volume is 65.1 mL.
Initial volume of the gas is 100 mL
Initial temperature is 300 degrees Celsius
It is required to find the volume the gas will occupy at 100 degrees Celsius. Charles law gives the relation between volume and temperature such that,
V₂ is new volume
V₁ = 100 mL
T₁ = 300 C = 573.15 K
T₂ = 100 C = 373.15 K
Plugging into formula we get :
So, the new volume is 65.1 mL.
Name two ways that living things use proteins
Proteins catalyze reactions, part of the immune system, transport molecules such as oxygen, and transmit messages from cell to cell.
What is protein?
Proteins are very large molecules made of basic units known as aminoacids. Proteins consist of carbon (C), hydrogen (H), nitrogen (N), oxygen (O), and sulfur (S).
Protein molecules are produced by twisted and folded strands of amino acids. Proteins are actively involved in the most important as well as basic aspects of life. These include metabolism, cellular communication, movement, molecular recognition, and defense.
The shape of structural proteins allows them to form essential structures of the body. Collagen holds most of the body tissues together, a protein with a fiber shape. Structural protein Keratin creates a network of waterproof fibers on the outer layer of the skin.
The shape of functional proteins enables them to contribute to the chemical processes of the body. Functional proteins include cell membrane receptors, hormones, growth factors, and enzymes.
Protein is used to build and repair tissue in the body. it is also used to create enzymes, hormones and other body chemicals.
The larger the hole in the ozone layer gets,A. the less UV rays reach the Earth
B. the more heat escapes from the Earth
C. the more UV rays reach the Earth
D. the warmer the Earth will get
The more UV rays reach the earth
Which stays the same during chemical reactions? the overall types of atoms only the overall numbers of atoms only both the overall types and numbers of atoms neither the overall types or numbers of atoms
Both the overall types and numbers of atoms stay the same during chemical reactions.
Write this number in standard notation. 1.986 x 10negative exponent 6 or 1.986 x 10^6
We have the number . Standard notation would basically be this number without the part.
To get rid of this part, we need to move the decimal point 6 places to the left (we go left because it's negative 6, indicating division).
So, when we move the decimal point 6 places to the left, the resulting number is: , with 5 zeros after the decimal point before a nonzero number.
Thus, the answer is .
Which of the following energy changes occurs as a bow is drawn and released?1. gravitational potential to chemical potential 2. magnetic potential to kinetic 3. elastic potential to kinetic 4. kinetic to thermal
Answer: The correct answer is 3.
Explanation: As the bow is drawn and released, it will experience a change in elastic potential energy to kinetic energy.
Elastic potential energy is defined as the amount of potential energy which is stored as a result of the deformation of the object which has some elasticity in it. For Example: Stretching of a spring, Drawing of a bow, etc..
Kinetic energy is the energy of the object which is possessed as a result of its motion.
When the bow is drawn, it first had some elastic potential energy and when it is released it had some kinetic energy in it.
Conclusion: The correct answer is 3.
3. elastic potential to kinetic Mechanical energy is the top suject while it has two types: Kinetic energy which is the energy in motion and potential energy which is the energy in reserve. The measure of both energy in motion and reserve is called Joules. Joules then is the International System of Measurement unit for energy, this is mainly used to account for scaling energy in all aspects.