Answer:
The answer to this question is ( a )
Explanation:
Answer:
the type of change in which the chemical composition of an element changes is called chemical change
the best example is the formation of H2O. Since Hydrogen is an inflammable gas and oxygen is consumed by fire to keep burning, but their product - H2O is used to extinguish oxygen
Answer:
solid
Explanation:
because solid has a definite shape and volume
Answer:
0.605 M
Explanation:
<em>What is the molarity of a 750 milliliters solution containing 54.0 grams of KBr?</em>
Step 1: Given data
- Mass of KBr (solute): 54.0 g
- Volume of solution: 750 mL (0.750 L)
Step 2: Calculate the moles corresponding to 54.0 g of KBr
The molar mass of KBr is 119.00 g/mol.
54.0 g × 1 mol/119.00 g = 0.454 mol
Step 3: Calculate the molarity of the solution
Molarity is equal to the moles of solute divided by the liters of solution.
M = 0.454 mol / 0.750 L = 0.605 M
