Explanation:
<u>Electrical energy:</u> Kinetic energy caused by moving electrons
<em>Example of energy: lighting</em>
<u>Chemical energy:</u> Energy stored in matter
<em>Example of energy: natural gas</em>
<u>Light energy:</u> a kind of kinetic energy that moves in waves and can be seen
<em>Example of energy: stars</em>
<u>Mechanical energy:</u> Is the sum of an object's kinetic energy and potential energy
<em>Example of energy: dart guns</em>
The answer is A.
We know the formula for molarity :
<u>Molarity = Number of moles ÷ Volume</u>
<u />
Let's assume there are 0.6 moles of NaCl in 1 liter of ocean water.
Then, mass of salt is :
- Mass of one mole salt × 0.6
- 58.5 × 0.6
- 35 grams
<h3>
Answer:</h3>
1.0177 g/cm³
<h3>
Explanation:</h3>
We are given;
- Mass of the cube = 40 grams
- Length of the cube = 3.4 units
We are required to get the density of the cube;
- Assuming the length is 3.4 cm
- The volume of the cube is given by l³
Thus, Volume of the cube = 3.4 cm × 3.4 cm × 3.4 cm
= 39.304 cm³
But, density = Mass ÷ volume
= 40 g ÷ 39.304 cm³
= 1.0177 g/cm³
Therefore, the density of the cube is 1.0177 g/cm³
There are a few ways to slow down a chemical reaction:
Provide less heat
; adding heat increases particle movement, speeding up a reaction.
Less surface area
: a larger surface area often also speeds up the reaction.
Less quantity of the element