Answer:
If this is that MC question then the answer is D.
Explanation:
The correct answer is D. The energy needed for a chemical reaction is called the activation energy. This energy is to be present in order for the reaction to happen. This can be achieved by supplying or releasing heat from a system of reactants. This can achieved faster by using a catalyst.
<h3>
Answer:</h3>
The conservation of mass and matter is true
<h3>
Explanation:</h3>
- The law of conservation of mass requires that the mass of reactants and products be equal in chemical reactions.
Given the equation;
AgNO₃ + HCI → AgCI + HNO₃
- The equation is balanced because, it has 1 silver atom, 1 nitrogen, 3 oxygen atoms, 1 hydrogen atom, and 1 chloride atom on both side of the equation.
- Therefore, the mass of the reactants and the products is equal which makes the law of conservation of mass hold.
- The conservation of matter is also true since the reaction process without changing the number of atoms of each element.
The concentration of solution : 0.2 M
<h3>Further explanation</h3>
Given
5.6 g Potassium hydroxide(KOH)
500 ml of solution = 0.5 L
Required
The concentration
Solution
Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution
MW KOH = 39+16+1=56 g/mol
mol solute(KOH) :
= mass : MW KOH
= 5.6 : 56 g/mol
= 0.1
Molarity :
= 0.1 : 0.5
= 0.2 M
The answer you are looking for is true
Answer:
Carbon is a highly covalent element due to the presence of four valence electrons in its outermost shell. This helps it bond covalently with other elements in various ways.
Carbon is known to be the backbone for most compounds. The carbon backbone vary in length and in the mode of bonding such as having the ability to from straight, branched, rings, double or triple bond which contibutes to the diversity and complexity of organic molecules.