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tresset_1 [31]
3 years ago
11

Why do the elements of the same group have similar properties ?

Chemistry
1 answer:
Yuliya22 [10]3 years ago
8 0
They have similar atomic structures. They do similar things. sorry I cant think of a by-the-book answer at the moment but that's pretty much it.
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Which statement about mixtures below is most accurate?
Vinvika [58]
C. Salad is heterogeneous because you can easily see the different parts. Lemonade is homogeneous because it mixes together so that you cannot easily separate it's parts
5 0
3 years ago
A chemist plans to use 435.0 grams of ammonium nitrate ion a reaction. How many moles of the compound is this?
AURORKA [14]
Ammonium Nitrate has the formula NH4NO3, and has a formula weight of 80.043 grams/mole. We can convert the amount in the problem to moles using this conversion factor. Divide 435 by 80.043 to find the number of moles.

435/80.043 = 5.435

This amount of Ammonium Nitrate contains 5.44 moles of substance, adjusted for significant figures.
4 0
3 years ago
Which of these objects have potential energy?
Korolek [52]

Answer:

it's C. but the sentence is incorrect I think it should be a ball "in" someone's hand

Explanation:

cause potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

8 0
3 years ago
A titration graph shows little resistance to a change in pH at the start and has a single equivalence point of 8.6.
konstantin123 [22]

Answer: A weak acid titrated by a strong base

Explanation:

The graph refers to the titration of a weak acid such as Hydrofluoric acid with a strong base such as Sodium Hydoxide. What happens is that as the process begins, the pH rises quickly as there is little resistance to the base.

After some time the solution formed begins to act as a buffer between the remaining acid and the base. This reduces the pH change rate and will continue until the base overcomes the solution's buffering capacity.

The Equivalence point which is where the acid will be at it's base form, will be at a pH of 8.6.

I have attached a graph showing the process for better understanding.

3 0
3 years ago
The fuel used to power the booster rockets on space shuttles is a mixture of aluminum metal and ammonium perchlorate. the follow
Charra [1.4K]

The moles of water that are produced from 373 moles of ammonia present in any chemical reaction is 746 moles.

<h3>What is the stoichiometry?</h3>

Stoichiometry of the reaction gives idea about the amount of entities present in any chemical reaction before and after the reaction.

Given chemical reaction is:

3Al + 3NH₄ClO₄ → Al₂O₃ + AlCl₃ + 3NO + 6H₂O

From the stoichiometry of the reaction it is clear that:

3 moles of Al = produces 6 moles of H₂O

373 moles of Al = produces 6/3×373 = 746 moles of H₂O

Hence required moles of water is 746 moles.

To know more about stoichiometry, visit the below link:

brainly.com/question/21931988

                                                                                                                                                                                                                                                                                                                               

6 0
2 years ago
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