Answer:
- 0.022% starch/min
Explanation:
Initial Conc. = 0.050 %
Final conc. = 0.028 %
Time = 1 min
Rate of Reaction = Rate of disappearance = Change in concentration of starch / time
Rate of disappearance = [0.028 - 0.050 ] / 1
Rate of disappearance = 0.022 / 1 = - 0.022% starch/min
The negative sign denotes that the starch is disappearing.
Answer:
1, 3, and 4
Explanation:
I'm guessing, but those make the most sense
Answer:
From 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.
Explanation:
Given data:
Mass of H₂SO₄ = 4.9 g
Mass of K₂SO₄ formed = ?
Solution:
Chemical reaction:
H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
Number of moles of H₂SO₄:
Number of moles = mass/ molar mass
Number of moles = 4.9 g/ 98.1 g/mol
Number of moles = 0.05 mol
Now we will compare the moles of H₂SO₄ with K₂SO₄ .
H₂SO₄ : K₂SO₄
1 : 1
0.05 : 0.05
Mass of K₂SO₄:
Mass = number of moles × molar mass
Mass = 0.05 mol × 174.3 g/mol
Mass = 8.715 g
Thus, from 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.
All chemical reactions have a conversation of mass and energy.
Because:- There are only two laws for conversation in a chemical reaction. The conversation of mass, no mass can be created nor destroyed. Also, the law of conversation of mass states that no energy can be created nor destroyed in a chemical reaction. The charge can obviously change because they can bond and change charges.
Answer:
False
Explanation:
Single-celled organisms use cell division as their method of reproduction. Humans are not single celled, we are multicellular, therefore this conclusion is incorrect.
Hope this helps :)
