Answer the following question given this paragraph: Pb(s) + 2H+(aq) + SO42(aq) PbSO4(s) + H2(g) Lead(II) sulfate is the white solid that forms on corroded battery terminals. Exercise Using the activity series, predict what happens in each situation. If a reaction occurs, write the net ionic equation. Q: What is the white solid that forms on corroded battery terminals? Choices: - ammonia sulfate - copper sulfate - straight sulfate - lead sulfate A:
lead sulfate
(Question)
Answer the following question given this paragraph: African Giraffes. Giraffes feed on leaves high in trees. Their long necks allow them to reach leaves that other ground animals cannot. Q: What allows giraffes to reach leaves that other ground animals cannot? Choices: - camouflage pattern - long tongue - long horns - long necks A:
(Answer)
long necks
Ques: Answer the following question given this paragraph: Water waves, sound waves, and the waves that travel along a rope are mechanical waves . Mechanical waves require a material medium such as water, air, or rope. Light waves, however, are electromagnetic waves and travel without a material medium. They are not mechanical waves. Q: What waves require a material medium such as water, air, or rope? Choices: - light - potential - electromagnetic - mechanical A:
Ans: mechanical
(Q).
Answer the following question given this paragraph: Introduction to Linear Momentum and Collisions We use the term momentum in various ways in everyday language, and most of these ways are consistent with its precise scientific definition. We speak of sports teams or politicians gaining and maintaining the momentum to win. We also recognize that momentum has something to do with collisions. For example, looking at the rugby players in the photograph colliding and falling to the ground, we expect their momenta to have great effects in the resulting collisions. Generally, momentum implies a tendency to continue on courseto move in the same directionand is associated with great mass and speed. Momentum, like energy, is important because it is conserved. Only a few physical quantities are conserved in nature, and studying them yields fundamental insight into how nature works, as we shall see in our study of momentum. Q: Generally, momentum implies a tendency to continue on courseto move in the same directionand is associated with great mass and speed. momentum, like energy, is important because it is what? Choices: - endless - sequences - invisible - conserved A:
(A).
conserved
Ques:Answer the following question given this paragraph: The reproductive system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex hormones. A gamete is a haploid cell that combines with another haploid gamete during fertilization. Sex hormones are chemical messengers that control sexual development and reproduction. The male reproductive system consists of structures that produce male gametes called sperm and secrete the male sex hormone testosterone. Q: What system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex hormone? Choices: - circulatory system - immune system - digestion - reproductive A:

Ans:reproductive
Question: Answer the following question given this paragraph: Ions and Ionic Bonds Some atoms are more stable when they gain or lose an electron (or possibly two) and form ions. This fills their outermost electron shell and makes them energetically more stable. Because the number of electrons does not equal the number of protons, each ion has a net charge. Cations are positive ions that are formed by losing electrons. Negative ions are formed by gaining electrons and are called anions. Anions are designated by their elemental name being altered to end in "-ide": the anion of chlorine is called chloride, and the anion of sulfur is called sulfide, for example. This movement of electrons from one element to another is referred to as electron transfer. As Figure 2.11 illustrates, sodium (Na) only has one electron in its outer electron shell. It takes less energy for sodium to donate that one electron than it does to accept seven more electrons to fill the outer shell. If sodium loses an electron, it now has 11 protons, 11 neutrons, and only 10 electrons, leaving it with an overall charge of +1. It is now referred to as a sodium ion. Chlorine (Cl) in its lowest energy state (called the ground state) has seven electrons in its outer shell. Again, it is more energy-efficient for chlorine to gain one electron than to lose seven. Therefore, it tends to gain an electron to create an ion with 17 protons, 17 neutrons, and 18 electrons, giving it a net negative (1) charge. It is now referred to as a chloride ion. In this example, sodium will donate its one electron to empty its shell, and chlorine will accept that electron to fill its shell. Both ions now satisfy the octet rule and have complete outermost shells. Because the number of electrons is no longer equal to the number of protons, each is now an ion and has a +1 (sodium cation) or 1 (chloride anion) charge. Note that these transactions can normally only take place simultaneously: in order for a sodium atom to lose an electron, it must be in the presence of a suitable recipient like a chlorine atom. Q: Some atoms are more stable when they gain or lose an electron and form what? Choices: - molecules - electrons - protons - ions A:
Answer:
ions