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DiKsa [7]
3 years ago
5

What are two statements about a true system

Chemistry
1 answer:
zimovet [89]3 years ago
8 0

Answer:

Let me know what is your questions!!

You might be interested in
238,2U --&gt; 234Th +<br> 90
stiv31 [10]

Answer:

\\_{2}^{4} \alpha

Explanation:

In this question, we wish to find the missing nuclei for the equation:

\\_{92}^{238} U\rightarrow _{90}^{234} Th + _{Z}^{A} X

In order to find the missing species, we need to use the charge and mass balance law. That is, the mass should be conserved: the total mass on the left-hand side with respect to the arrow should be equal to the total mass on the right-hand side with respect to the arrow:

238 = 234 + A

Notice from here that:

A = 238 - 234 = 4

So far we know that the mass of X is 4. Similarly, we apply the law of charge conservation. The total charge should be conserved:

92=90+Z

From here:

Z = 92-90=2

We have a particle:

\\_{2}^{4} X

Looking at the periodic table, an atom with Z = 2 corresponds to helium. This can also be written as an alpha particle:

\\_{2}^{4} \alpha

5 0
3 years ago
How many moles are in an 11mL solution of NaOh and KHP (C8H4O4)​
zalisa [80]

Answer:

Calculate the molar concentration of the NaOH solution that you prepared Number of moles of KHP = Number of moles NaOH = 2.476 x 10 -3 moles Number of moles NaOH = Mb x Vb Mb = 2.476 x 10 -3 moles / 0.0250 L (equivalence point) = 0.0990 M 3

Explanation:

6 0
3 years ago
It seems that the earth is the only planet that can support life as we know it. Which of these is a characteristic of the earth
Softa [21]
Water on earth can exist in all 3 states: solid, liquid, and gas.
Earth is just the right distance from the sun so that temperatures are ideal for living organisms.
Earth has a protective atmosphere shielding the planet from harmful UV and X rays.
4 0
3 years ago
When a substance was dissolved in water, the temperature of the water increased. This process is described as
NemiM [27]
The correct answer will be A
3 0
3 years ago
2. Why is it important in gravimetric analysis to add an excess amount of precipitating ions to a solution containing an analyte
Wewaii [24]

It is important in gravimetric analysis to add an excess amount of precipitating ions to a solution containing an analyte because it helps to determine the mass of the analyte.

<h3>What is Gravimetric analysis?</h3>

This is a method which is used in the determination of the quantitative determination of the ion being analyzed(analyte) based on its mass.

Adding an excess amount of precipitating ions to a solution containing an analyte will make it easier for the mass of an analyte to be determined.

It is also important for the precipitate to be a pure substance with a definite and known composition which therefore makes it the most appropriate reason.

Read more about Gravimetric analysis here brainly.com/question/6163057

#SPJ1

8 0
1 year ago
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