Please help me with the following questions:
1. A scientist suspected that the increase in the acidity of ocean water could have a devastating effect on organisms such as snails because it could break down calcium carbonate, a chemical that makes up their shells. Which could result from this hypothesis?
A. experimentation to test the current acidification of ocean water - I think it is this one.
B. experimentation to test the effect of carbon dioxide on shells of marine animals
C. experimentation to test the effect of carbon dioxide on calcium carbonate
D. experimentation to test the effect of calcium carbonate on the acidification of ocean water - I got it wrong
For 1, I got D wrong, and now I think it is A. I just need someone to check my answer.
7. John Dalton said that the total pressure (Pt) exerted by a mixture of gases in a container is equal to the sum of the individual pressures of each gas present (if each gas was the only one present in the container). Further experimentation has widely supported Dalton’s work on partial pressures.
Rafael’s classmates are arguing about how best to identify Dalton’s contribution. Evaluate their arguments and determine which is the most accurate.
A. Rosario says Dalton made observations of partial pressures since he just observed and recorded the pressure of gases.
B. Amit says Dalton formulated a hypothesis of partial pressures since his observations led to later experimentation.
C. Raj says Dalton formulated a theory of partial pressures since he explained exactly how to determine the pressure of gases.
D. Cora says Dalton formulated the law of partial pressures since he stated that the total pressure of a mixture of gases is the sum of the individual pressures.
For 2, I have no idea what it is. I've looked in my notes, but they did not help me much for this one.
Any help will be greatly appreciated!!! :)
The scientist SUSPECTED that acid might be harmful.
Therefore experiment to see if CO2 in water harms shells
He said ....
then
.... experimentation supported
Amit agrees :)
1. You are correct, the answer to the first question is A. In order to validate the hypothesis that the increase in ocean water acidity could negatively affect organisms such as snails, experimentation to test the current acidification of ocean water is necessary. By measuring and analyzing the acidification levels in ocean water, scientists can assess the potential impact on snails and other organisms with calcium carbonate shells.
2. For the second question, the most accurate argument is D. Cora says Dalton formulated the law of partial pressures since he stated that the total pressure of a mixture of gases is the sum of the individual pressures. John Dalton's law of partial pressures states that in a mixture of gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas. Cora's argument accurately describes Dalton's contributions and his formulation of this law.