Help me
1.Imagine that you used a deck of 52 cards to create a house of cards. The house of cards weighs 96 grams. If the house of cards falls down, how much will the pile of cards weigh?
2.Mixing cream and vinegar is an example of a ________ because new substances are formed. The weight of the mixture ________ during the course of the reaction.
3.A pile of wood is burned in a campfire and produces ash. The ash has less mass than the original wood. What can you predict about the chemical reaction that forms ash from wood?
4.A chemical reaction changes the _______ of a substance.
5.How does changing the reactants of a chemical reaction affect the products?
6.Which of the following situations are an example of an object experiencing both a physical change in color followed by a physical change in texture?
7.You are told an object has undergone a physical change. What prediction can you make about how the object has changed?
8.Which of the following describes a chemical change?
9.To make a smoothie, Moira added 320 grams of water to 80 grams of oatmeal, 100 grams of mango, and some protein powder. If the smoothie weighed 520 grams, how much protein powder did she add?
10.If you are following the recipe for a cake, how will the order in which you add the ingredients affect the mass of the batter?
However, I will start you out. Whether they are in a house or a pile, the cards weigh the same.
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
No cheating
1. To find out how much the pile of cards will weigh when the house falls down, you need to determine the weight of each individual card in the deck. To do this, you can divide the total weight of the house of cards (96 grams) by the total number of cards in the deck (52 cards). This will give you the weight of each card. Once you have the weight of one card, you can multiply it by the number of cards in the pile to find the weight of the pile of cards after the house falls down.
2. Mixing cream and vinegar is an example of a chemical reaction because new substances are formed. During the course of the reaction, the weight of the mixture may change. In some cases, the weight may increase due to the addition of new substances or reactants. However, in other cases, the weight may decrease if any gases are produced that escape into the atmosphere.
3. When a pile of wood is burned in a campfire and produces ash, the ash has less mass than the original wood. This indicates that some of the mass of the wood has been converted into gases, such as carbon dioxide and water vapor, and have escaped into the atmosphere. Therefore, we can predict that the chemical reaction that forms ash from wood involves the conversion of solid wood into gaseous products.
4. A chemical reaction changes the composition of a substance. It involves the rearrangement of atoms and the formation of new chemical bonds, leading to the formation of new substances with different properties. This change in composition may result in changes in physical properties such as color, odor, state of matter, and density.
5. Changing the reactants of a chemical reaction can have a significant effect on the products formed. Different reactants may lead to different chemical reactions and therefore different products. For example, if you mix sodium bicarbonate (baking soda) with vinegar, it produces carbon dioxide gas and water. However, if you mix sodium bicarbonate with hydrochloric acid, it produces carbon dioxide gas, water, and a different salt. So, by changing the reactants, you can control the products of a chemical reaction.
6. An example of an object experiencing both a physical change in color followed by a physical change in texture could be painting a wooden surface. Initially, the wooden surface may have a natural or original color. When you paint it, the color changes due to the application of pigments. After the paint dries, the texture of the surface may also change, becoming smoother or rougher depending on the type of paint used.
7. If you are told that an object has undergone a physical change, it means that its physical properties have been altered, but its chemical composition remains the same. This prediction suggests that the change could involve a change in shape, size, state (solid, liquid, or gas), texture, color, or density of the object, but it does not involve the formation of new substances.
8. A chemical change, also known as a chemical reaction, occurs when one or more substances are transformed into different substances with different chemical properties. Some examples of chemical changes include burning wood, cooking food, rusting of iron, and fermentation of grapes to produce wine. These changes involve the formation of new bonds between atoms, resulting in the formation of new substances.
9. To find out how much protein powder Moira added to the smoothie, you need to subtract the combined weight of water, oatmeal, and mango from the total weight of the smoothie. Add the weight of water (320 grams), oatmeal (80 grams), and mango (100 grams). Then subtract this sum from the weight of the smoothie (520 grams). The result will give you the weight of the protein powder Moira added.
10. The order in which you add the ingredients when following a recipe for a cake may affect the mass of the batter. For example, if you add the dry ingredients first and then the wet ingredients, the mass may increase due to the addition of liquids or the incorporation of air during mixing. On the other hand, if you add the wet ingredients first, followed by the dry ingredients, the mass may decrease as the liquid ingredients can potentially evaporate or be absorbed by the dry ingredients, resulting in a smaller overall mass. However, it's important to note that the overall mass change may be minimal and depend on the specific ingredients and cooking methods used.