If water molecules are like magnets, why do you think frozen water molecules don't pull toward each other? do you think it has anything to do with how close together the molecules are?
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If water molecules are like magnets, why do you think frozen water molecules don't pull toward each other? do you think it has anything to do with how close together the molecules are?
A water molecule consists of two hydrogen atoms bonded to an oxygen atom,and its overall structure is bent.This is because the oxygen atom,also carries two pairs of unshared electrons.All of the electron pairs-shared and unshared-repel each other.
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- Which of the following statements is correct regarding polar/nonpolar molecules? 1. Molecules comprised of nonpolar covalent bonds are likely to be hydrophilic 2. Polar molecules like sugar tend to dissolve in solutions of other polar molecules like water 3. Nonpolar molecules like sugar tend to dissolve in solutions of polar molecules like water 4. Polar covalent bonds tend to form between molecules that consist of two atoms of the same element, like oxygen gas (O2) or nitrogen gas (N2)In Science experiments, it is very important to “control the variables” so that there is only ONE independent variable and ONE dependent variable. We “control the variables” by making anything else that could change during the experiment into a constant. For example, if you are doing an experiment to find out what material can hold more water, then it is important to make sure all the materials you are testing are the same size. Why is it so important to control the variables? What would happen if we did not control them?You have just added substance X to a glass of water. The pH of the water changed from 7 to 4. you conclude that substance X is a because it caused the amount of H+ ions in the water to for each choice, the item in front of the semicolon (;) goes into the first space. the item behind the semicolon goes into the second space. for example if a choice says- "buffer; increase", buffer goes into 1st space and increase goes into 2nd space buffer; neither increase or decrease base; decrease base; increase acid; decrease O acid; increase
- Which of the following types of magnetic materials possess electrons whose spins are affected by other nearby electrons? Diamagnetic, ferromagnetic, ferrimagnetic, paramagnetic, antiferromagneticImagine you have an oil/water mixture where the oil is non-polar and the water is polar. Your friend grabs table salt (sodium chloride) and throws it into the mixture. What do you expect to see? If your friend has no chemistry background, what would you say to your friend to explain the result?Study figure 3.18 in the textbook. See if you can understand why some R groups are nonpolar, some polar, and others electrically charged (acidic or basic). If you were given an R group, could you place it in the correct group? Work on the R groups until you can see common elements in each category.
- Organic molecules contain both carbon and hydrogen atoms (and may have a few other elements as well). There are millions of kinds of organic molecules. They include molecules like: What is the smallest organic molecule?Why do you think that most textbooks do not consider a hydrogen bond to be an example of a van der Waals force?What do you mean by ground substance?
- How do you know scientifically that fat and soap are different substances ?Remember the glass slide experiment where two dry slides wouldn't stick to each other but the slides with one drop of water between them would adhere to one another? Ethanol forms fewer hydrogen bonds than water due to the chemical differences between the two molecules. If we performed this same experiment with the glass slides using ethanol instead of water, what would we observe? O It will be more difficult to separate slides with a drop of ethanol between them There will be no difference in the amount of effort required to separate slides with drops of ethanol or water between them O It would be easier to separate slides with a drop of ethanol between themWhat is the significance of water and its solutions to all living systems, and why is it important to understand the properties that allow water to support life?