CHEMISTRY HIGH SCHOOL

Describe the measurements necessary to find the average speed of a moving train

Answers

Answer 1
Answer:

Answer:

use the rule of speed

Explanation:

speed =distance over time

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Predict the changes in the number of particles based the diagram.A) Pressure is indirectly related to moles. B) Volume is proportionally related to moles. C) Moles remains constant as pressure changes. D) Temperature is directly related to the moles.
if you have 3.50 moles of hydrogen and 5.00moles of nitrogen to produce ammonia, witch element is the reactant in excess? 3H2+N2=2NH3

Which substance is NOT a compound?a. salt
b. sodium
c. pure water
d. carbon monoxide

Answers

Among the given ones, sodium is not a compound. The correct option is b.

What is a compound?

The substance that is formed by union of different elements is referred to as a compound.

For instance, salt is made up of sodium and chloride, water have hydrogen and oxygen, etc.

Thus, the correct option is b.

For more details regarding compound, visit:

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b, sodium because if you look at your periodic table it is the only element not compounded with another 

Your sense of touch is based in your _____.
bones
muscles
skin
tissues

Answers

umm tissues , because it is caused by receptors .

Answer:

Skin

Explanation:

Hope this helps   :)

Given a formula of a functional group: An organic compound that has this functional group is classified as

Answers

An organic compound that has this functional group is classified as Unsaturated hydrocarbons, Halides, Acids and bases, Aldehydes and Ketones. 

Read the sentence below and answer the question that follows.Tommy the Clown or the Hip Hop Clowns travel the world performing for diverse audiences.



How should the sentence above be rewritten to correct the subject-verb agreement error?

A) The sentence is correct as written.
B) Tommy the Clown or the Hip Hop Clowns travels the world performing for diverse audiences.
C) Tommy the Clown or the Hip Hop Clowns was travelling the world performing for diverse audiences.
D) Tommy the Clown and the Hip Hop Clowns travels the world performing for diverse audiences.

Answers

Correct sentence should be B. Tommy the Clown or the Hip Hop Clowns travels the world performing for diverse audiences. If there is a single subject then the verb should be plural, that is, it should be travels as oppose to travel.

Answer:

Answer is A) The sentence is correct as written

Explanation:

In what ways is a sodium atom different from a sodium ion? *

Answers

sodium atom is neutral where sodium ion is a charged specie with a charge of +1. The number of protons and electrons in sodium atom is same 11 where the number of protons in sodium ion (11) is more than number of electrons (10). The size of sodium ion is smaller than sodium atom.

What is the limiting reactant when 8.4 moles of lithium react with 4.6 moles of oxygen gas? Unbalanced equation: Li + O2 → Li2O

Show, or explain, all of your work along with the final answer.

Answers

Answer: Lithium

Explanation: The balanced chemical equation is:

4Li+O_2\rightarrow 2Li_2O

It can be seen, 4 moles of lithium combines with 1 mole of oxygen gas to produce 2 moles of lithium oxide.

Thus 8.4 moles of lithium combines with=(1)/(4)* {8.4}=2.1molesof oxygen gas to produce 4.2 moles of lithium oxide.

As, Lithium limits the formation of product, it is the limiting reagent and Oxygen gas is present in excess, it is called the excess reagent. (4.6-2.1)=2.5 moles of oxygen gas are present in excess.
To determine the limiting reactant, we divide the number of moles to its corresponding stoichiometric coefficient. Balancing the equation above, we get 4 Li + O2 = 2Li2O. For lithium, the result is 2.1 and for oxygen, the result is 4.6. The limiting reactant has the smaller ratio. So, the limitin reactant is lithium.
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