A catalyst is a substance that decrease the activation energy needed to start a reaction.
Answer:
Explanation:
The unbalanced nuclear equation is
Let's write the question mark as a nuclear symbol.
The main point to remember in balancing nuclear equations is that the sums of the superscripts and the subscripts must be the same on each side of the equation.
Then
15 = 0 + A, so A = 15 - 0 = 15, and
6 = -1 + Z, so Z = 6 + 1 = 7
Then, your nuclear equation becomes
Element 7 is nitrogen, so the balanced nuclear equation is
Answer:
Shorter
Explanation:
As a wavelength increases in size, its frequency, and energy (E) decrease. From these equations, you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer. There are two basic types of waves: mechanical and electromagnetic.
Answer:
Yes
Explanation:
A single covalent bond forms when two atoms share one pair of electrons.
Covalent bonds are formed between two or more atoms having zero or very small electronegativity difference. Such bonds exists between molecules of non-metals.
- To form a covalent bond, each of the two participating atoms would put down an unpaired electron.
- The unpaired electrons form a shared pair of electrons between them.
- This shared pair of electrons constitutes the electron cloud that binds the two atoms together.
- The shared pair of electron is the covalent bond.
Answer:
The 1990 amendments addressed the growing problem of urban smog by acid rain.
Explanation:
As shown in the above question, the Clean Air Act was created with the goal of making the US air healthier, while also aiming to reduce the impacts of pollution on the American population. This law had as its main objective to reduce the emission of gases capable of polluting the atmosphere, especially those resulting from the burning of gasoline in cars. In 1990, a new amendment was added to this law. This amendment aimed to reduce emissions of sulfur dioxide and nitrogen oxides, as they were the main cause of acid pollution, which was responsible for acid rain that is extremely dangerous and negative for society.
