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3 years ago

Plants or animals with desirable characterstics are bred together to create improved varieties. What is this process called?

Chemistry

1 answer:

STatiana [176]3 years ago

3 0

Answer:

cross breeding or selective breeding its common with dogs

Explanation:

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A large piece of iron was reacted with an acid. What would happen to the rate of the reaction had the large piece been finely di

Anna007 [38]

The reaction occurs in a similar way as magnesium does, but much less vigorous. Strong heating is required to make iron powder burn in oxygen. The reaction gives out a yellow showery sparks and produces a black solid. iron reacts with dilute hydrocloric acid to give iron chloride and hydrogen gas.

3 0

3 years ago

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A car with a mass of 1,500 kg is traveling at a speed of 30 m/s. What force must be applied to stop the car in 3 seconds ?

saw5 [17]

Yo sup??

we can solve this problem by applying Newton's 2nd law

F*t=Δp

p=momentum

pi=mu=1500*30

pf=mv=m*0=0

Therefore

F*3=1500*30

F=15000 N

Hope this helps.

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3 years ago

Which of the following species has the greatest

Licemer1 [7]

Answer: Option (3) is the correct answer.

Explanation:

When there is a negative charge on an atom then we add the charge with the number of electrons. Whereas when there is a positive charge on an atom then we subtract the charge from the number of electrons.

Atomic number of chlorine is 17. So, number of electrons present in $Cl^{-}$ is 17 + 1 = 18 electrons.

Atomic number of cobalt is 27. So, number of electrons present in $Co^{4+}$ is 27 - 4 = 23 electrons.

Atomic number of iron is 26. So, number of electrons present in $Fe^{2+}$ is 26 - 2 = 24 electrons.

Atomic number of vanadium is 23. So, number of electrons present in V is 23 electrons.

Atomic number of scandium is 21. So, number of electrons present in $Sc^{2-}$ is 21 + 2 = 23 electrons.

Thus, we can conclude that out of the given species, $Fe^{2+}$ has the greatest number of electrons.

4 0

4 years ago

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What type of mixture will not allow light to pass through

igor_vitrenko [27]

Suspension. The particles are big enough for the eye to see, and will separate if left sitting.

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3 years ago

Which statement about the relationship between laws, hypotheses, and theories is true?

MariettaO [177]

<h2><em>if a hypothesis is not contradicted after a lot of testing it may be considered a law </em></h2><h2><em></em></h2>

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3 years ago