Answer:
<em>A pure substance made up of two or more elements that are chemically combined is a compound</em>
Explanation:
It is necessary to dilute the given substances prior to determining the pH because the concentrated solutions prevent contact with the pH meter and give lower values.
A solution's acidity may be determined by looking at its pH, which is a measurement of hydrogen ion concentration. Pure water slightly separates into ions with roughly equal amounts of hydrogen and hydroxyl (OH) ions.
Detergents, soaps, and shampoos all include surfactants, and when they are concentrated, their activity prevents the surfactant from making adequate contact with the pH meter's electrode, resulting in readings that are a little lower than they should be. The pH is determined correctly when the surfactant activity is diluted in the solution.
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Answer:
C because both are way too big to pass through the filter
Explanation:
Answer:
The rate of the reaction would be halved.
Explanation:
The reaction is first order with respect to reactant A and second order with respect to reactant B. The rate equation is [A][B]^2
If the concentration of A is doubled and the concentration of B is halved, rate = 2 × (1/2)^2 = 2 × 1/4 = 1/2.
The rate would be halved.
Answer:
0.00916432 km/s
21648 inches/minute
Explanation:
1 kilometre / second =
2236.936 miles per hour
20.5/2236.9=0.00916432km/s
1 mile per hour =
1056 inches / minute
20.5×1056=21648 inches/minute