CHEMISTRY MIDDLE SCHOOL

What is this section of the periodic table called

Answers

Answer 1

Answer:

Answer:

Noble Gases

Explanation:

They all have complete outer shells. They're also on column 18 :)

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The distance traveled divided by time taken to travel the distance is?

Answers

Answer:

speed

Explanation:

speed=distance/time

Studies show that the average height of all Earth's oceans is increasing overtime. Which of the following is a possible cause?

A. Seawater is expanding as it gets warmer,

B. The ocean's conveyor belt is speeding up,

C. Upwellings are becoming more frequent.

D. The moon's gravitational pull is decreasing.

Answers

Answer:

Explanation:

global warming causing the icebergs to melt which rises water

Final answer:

The average height of Earth's oceans is increasing mainly due to thermal expansion caused by global warming. The warmer the seawater gets, the more it expands, raising the ocean levels.

Explanation:

The studies show that the average height of all Earth's oceans is indeed increasing over time. Amongst the provided options, a possible cause for this is, A. Seawater is expanding as it gets warmer. This concept is referred to as thermal expansion. When water gets warmer, the molecules have more energy and therefore tend to take up more space. This causes the volume of the ocean to increase, leading to a rise in sea levels. The remaining options - Ocean's conveyor belt speeding up, upwellings becoming more frequent and the moon's gravitational pull decreasing - have minimal or no direct impact on the overall rise in ocean levels.

Learn more about Sea Level Rise here:

brainly.com/question/32331702

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Name three types of bodies in the solar system

Answers

Sun, the plants, dwarf plants. you could also say gas giants.

Planets,stars, moons and a lot of more bodies in the solar system

What happens to paper chromatography in you leave it in water for too long?

Answers

Nothing, really, the paper itself just gets wet and thats it. One thing to be careful of is, though, is that the dye/pigment can get too diluted and it would be hard to distinguish each of them from each other.

How would changing the proportions of substance in an alloy change its properties?

Answers

An alloy is a mixture of two or more metals which is produced with a specific proportion between metals. So, if the proportion is changed the physical characteristic would be changed as well. For example, brass musical instruments are made of brass which is a mixture (an alloy) of zinc and copper in a specific proportion. If you change a proportion, you will change the physical characteristic of brass musical instruments, and a sound they produce will be different.

Final answer:

Adjusting the proportions of substances in an alloy can significantly alter its physical and chemical properties, including hardness, boiling point, physical strength, and resistance to corrosion. These changes can cause phenomena such as rusting or shifting in acidity.

Explanation:

Changing the proportions of substances in an alloy impacts its properties. For instance, changing the ratios of iron, carbon, nickel, and other elements in steel, an alloy, can affect its physical strength and resistance to corrosion. It's crucial to understand that in any alloy, the relative compositions of different elements produce the character of the alloy. For example, in steel, altering the amount of carbon can change the hardness and tensile strength of the final product.

It's also important to know about the law of multiple proportions in chemistry. This law states that when two elements react to form more than one compound, a fixed mass of one element will react with masses of the other element in a ratio of small whole numbers. In alloy formation, these proportions of mass can significantly affect the properties of the resulting alloy.

Physical and chemical properties, such as hardness and boiling point, can be altered by changing the proportions in an alloy. These shifts can lead to both physical or chemical changes, such as melting, freezing, rusting, or even changes in flammability and acidity.