CHEMISTRY HIGH SCHOOL

Grace is given a piece of wood, an iron nail, and a styrofoam cup. She puts these objects into a bucket of water and observes that the nail sinks to the bottom, the wood floats just under the surface, and the cup floats on top of the water. What property is being demonstrated by this experiment.A) density
B) melting point
C) solubility
D) temperature

Answers

Answer 1

Answer:

Answer:

Explanation:

because the Styrofoam cup is less dense than the water it floats and because the nail is more dense it sinks

Answer 2

Answer: The answer to this question is a

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What is an oxpecker bird eats insects off the back of a rhinoceros

Answers

Actually when the oxpecker bird eats insects off the back of the rhinoceros. They are helping each other. The bird gets a nutritious snack while the rhinoceros gets those pesty and annoying bugs off of him. This is also called a Symbiotic relationship. When both organisms of different species work together to benefit the other.
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You put two open cans of soda on the table. You took one can from the refrigerator and the other from your car. When you open them, which can of soda will lose the carbon dioxide more quickly and why?

Answers

The soda can from the car will lose CO2 more quickly. This is because of the kinetic energy and behavior of gas molecules under different temperatures. CO2 is more soluble in cold temperatures than hot. Cold temperatures minimize the kinetic energy of gas molecules; thus, preventing the gas from escaping the soda. This is why soda that comes from the refrigerator has more fizz or spirit than soda at room temperature.

14. How do scientists know that the universe is expanding? The galaxies are moving away from each other, and the temperatures are decreasing. The galaxies are moving away from each other, and the temperatures are increasing. The galaxies are moving toward each other, and the temperatures are increasing. The galaxies are moving toward each other, and the temperatures are decreasing.

Answers

The universe is expanding is as the galaxies are moving away from each other, and the temperature of the universe is decreasing. Therefore, option (1) is correct.

How is the universe expanding?

First scientists theorized that as the universe is expanding and its temperature has gradually decreased. The universe has been expanding since the Big Bang and, as it expands, it’s temperature cooling down.

The temperature of the universe can be measured by looking at the cosmicmicrowave background (CMB). The temperature an be estimated by the thermal radiation left over from the BigBang.

The CMB scientists have been investigating that its temperature has been dropping off gradually as our universe expands out and the current average temperature of the cosmos is estimated about 2.73 Kelvin.

The point of the Big Bang from the Big bang theory is described as densesingularity and infinitely hot. The energy from the Big Bang distributed as the universe expands and gives the cooling effect.

But new research suggests otherwise that the temperature of the earth is actually increasing as it expands. Therefore, the temperature of universe increasing with its expansion.

Learn more about universe expanding, here:

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the galaxies are moving away from each other and the temps are decreasing

List four properties of a candle

Answers

1. Physical properties
. Its soft
. Its moldable
. Its white/translucent without color added
. Its insoluble in water
. its soluble in benzene and ether
. it melts around 120 degrees farenheit

2. Chemical properties
. It is a hydrocarbon with around 25 carbon atoms
. it reacts with oxygen to form water vapor and CO2
. its nonpolar (not sure if thats physical or chemical)

Which molecule has a tetrahedral arrangement of electron pairs but is not a tetrahedral molecule?