Answer:
0.019 moles of M2CO3
Explanation:
M2CO3(aq) + BaCl2 (aq) --> 2MCl (aq) + BaCO3(s)
From the equation above;
1 mol of M2CO3 reacts to produce 1 mol of BaCO3
Mass of BaCO3 formed = 3.7g
Molar mass of BaCO3 = 197.34g/mol
Number of moles = Mass / Molar mass = 3.7 / 197.34 = 0.0187 ≈ 0.019mol
Since 1 mol of M2CO3 reacts with 1 mol of BaCO3,
1 = 1
x = 0.019
x = 0.019 moles of M2CO3
Answer:
It will increase the rate of chemical weathering.
Explanation:
Weathering is the breaking down or dissolving of rocks and minerals on the surface of the earth into smaller grains or soil.
Weathering can occur either by biological, chemical or mechanical means.
When mechanical (or physical) weathering breaks a small boulder into pieces, this will lead to an increase in the rate of chemical weathering.
Chemical weathering involves chemical reactions or changes that occur in rocks which results in changes in their size and composition. This chemical reactions that breaks down rocks include hydrolysis by water and oxidation by oxygen. <em>The rate of chemical reactions increase with increase in surface area of the substances reacting.</em>
When the boulder is broken into smaller pieces, it exposes a larger area of these rocks to the chemical reactions that weather rocks. For example, a larger surface of the rock may be exposed to water result in faster reaction of the rock salts with water, and thus, the rock particles are broken down faster.
Answer: The percent of sulfate is present in the coal samples is 0.999%.
Explanation:
Given: Percentage of sulfur present = 3%
In 
, the percentage by weight of Sulfur is calculated as follows.
This means that the amount of only sulfur present in in the sample is as follows.
Thus, we can conclude that percent of sulfate is present in the coal samples is 0.999%.
