Need help please i need a good grade will give more points if correctly answered
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The answer is 5. Sulfur, iron, copper, gold, and aluminum are elements.
Help on both questions please
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the sun makes them turn brown or dry and die
1. This is not a chemical change rather a physical one 2. Not sure which molecules this question refers to but the water molecules in the plant cells evaporate out
Why does methane have a low boiling pint?
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Methane is an alkane. Alkanes are composed of a number of carbons (denoted by the prefix on the chemical name, e.g. meth-ane, eth-ane, prop-ane, but-ane...) which are saturated with hydrogen atoms (the largest number of hydrogens possible are bound to them). Methane has one carbon, which is saturated with 4 hydrogen atoms - this means that the chemical formula is CH4 (where the 4 should be subscript, but I can't work it out in this text field).
The boiling point depends on the strength of the intermolecular forces between each molecule - as the length of the molecule increases, so does the force of attraction between them because there are more points to attract together. Methane has a very short chain length of only 1 carbon, so the intermolecular forces are very weak. Because the forces are weak, very little energy is required to overcome them to allow the substance to become gaseous (gas molecules spread out to fill any space, requiring a negligible strength of intermolecular forces).
Consequently the boiling point of methane is so low that it is found in gaseous form almost all of the time on Earth - however Titan, one of the moons of Saturn, has seas of methane on its surface, because it is so cold there that it is possible for methane gas to condense into liquid.
In order to consider the boiling point of a substance, we need to think about the forces holding the molecules together. Because methane (CH4) is a non-polar molecule the molecules are held together only by London Dispersion Forces which are very weak and easy to break. These bonds break when methane boils and because they are weak, it boils at a low temperature.
Melted candle wax has no fixed shape, but it does have a fixed volume. So, melted candle wax is a A.Liquid B.Gas C.Mixture D.Solid
Plz answer fast
This is for science so I just put chemistry
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It is a liquid because when you have a liquid, there is no definite shape. Therefore, this would be the answer because it takes the shape of its container.
Final answer: a. Liquid
the answer is A.Liquid
How does a seal belt help prevent injuries by applying a for
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A seat* belt can help prevent major injuries from car crashes because it can buckle people down safely. If a car crashed into the car and you were in the front seat without a seat belt, you could catapult straight out the window. With a seatbelt on, you will be restrained and fastened to the chair and have some not major injuries.
A seat belt helps to prevent injury in the event of a car crash by reducing the velocity of a body as it experiences a sudden decrease in speed. Due to the body's inertia, which is its 'resistance to a change in speed or direction of travel', a passenger in a vehicle will want to continue travelling forwards once the car has reached a sudden stop. If the vehicle is travelling at 50mph and crashes into a brick wall, instantly reducing its velocity to zero, the passenger will continue moving forwards at 50mph unless there is something in front of them to create a 'stopping force'. This is because the velocities of the car and passenger are independent.. Hope this helps you!(: Good luck.
What would happen to temperatures on earth the suns heat were distributed throughout the atmosphere
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If the sun's heat is distributed uniformly throughout the atmosphere, this will ensure that each point on the earth gets a moderate level of heat and temperature in these locations will be within the acceptable level. If the sun's heat is concentrated in one part of the atmosphere, the location that correspond to the point of concentration will receive enormous amount of heat from the sun, which will shoot up the temperature of that location. This will leads to all manner of disruptions in the ecosystem that is found in that location.
For example, California's water cycle was on hold because we did not have any rain. The weather has been dry warm, so all of the water is being evaporated, but never reaching the precipitation phase of the cycle.