In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change. A chemical reaction is a mechanism that takes place when two or more molecules interact to produce new products. A reaction between two atoms or ions or molecules may take place and a new bond is formed and no atom is destroyed or created, but reactants form a new substance.
True ^_^
Answer:
0.30 mol/L
Explanation:
Mass = 108 g
Molar mass of glucose = 180.156 g/mol
The formula for the calculation of moles is shown below:
Thus,
Given Volume = 2 L
<u>Molarity = 0.3 mol/L</u>
Correct lol, Be nice they favourite ur class nad u bearly get homework
Answer:
<u>The answer is 6.55 * 10⁻⁷</u>
Explanation:
Let's write 0.000000655 mL in scientific notation:
The first step is you have to move the decimal place until you have a number between 1 and 10. If you keep moving the decimal point to the right in 0.000000655 you will get 6.55.
Now, the second step is you count how many places you moved the decimal point. You moved it 7 places to the right to change 0.000000655 to 6.55.
Finally, You need to show that you moved the decimal point 7 places to the right by noting that the number should be multiplied by 10⁻⁷ because a power of ten with a negative exponent, such as 10⁻⁷, means the decimal was moved to the right.
<u>The answer is 6.55 * 10⁻⁷</u>
Answer:
The final temperature of the mixture is closest to 30ºC
Explanation:
<u>Step 1:</u> Data given
Volume of sample 1 = 30 mL ≈ 30 grams
Temperature of sample 1 = 10 °C
Volume of sample 2 = 50 mL ≈ 50 grams
Temperature of sample 2 = 50 °C
Step 2: Calculate the final temperature
T(final) = (30 g * 10 °C + 50 g * 50 °C) / (50 g + 30 g)
T(final) = (300 + 2500)/80
T(final) = 35 °C
The final temperature of the mixture is closest to30ºC
