Answer:4 significant figures
Explanation:
Answer: Groundwater and surface water are connected. When groundwater is overused, the lakes, streams, and rivers connected to groundwater can also have their supply diminished. Land subsidence occurs when there is a loss of support below ground. This is most often caused by human activities, mainly from the overuse of groundwater, when the soil collapses, compacts, and drops.
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Answer: a) 0.06 M
b) 3.13 grams.
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
Moles of
The balanced reaction for dissociation will be:
Thus for 4 moles of , there is 1 mole of
Thus moles of
Molarity of
Thus the molarity of the solution = 0.06 M
b) Mass of =
Thus mass of Wenzhou use is 3.13 grams.
Answer:
C
Explanation:
The rate of a reaction decreases as time progresses. ... If the amount of reactant particles is decreasing as the reaction progresses, then the chance of successful collisions must also decrease, and ultimately when all the reactant particles have reacted, the reaction must stop and the rate become zero.
<h3>
Answer:</h3>
1.265 g/mL
<h3>
Explanation:</h3>
<u>We are given;</u>
- Mass of a rock as 43 g
- Volume of the rock as 34 mL
- Altitude of the rock as 4390 ft
We are required to calculate the density of the rock.
Density is the mass of an object per unit volume.
It is calculated by;
Density = Mass / volume
Therefore;
Density = 43 g ÷ 34 mL
= 1.265 g/mL
Thus, the density of the rock is 1.265 g/mL