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3 years ago

What do you think or know about atoms?

Chemistry

1 answer:

valkas [14]3 years ago

7 0

Answer:

atoms I personally think and somewhat know that they are what mostly makes up everything and everyone but an interesting fact scientists say atoms can not touch

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10 Which terms identify types of chemical reactions?(1) decomposition and :sublimation

Leona [35]

#2. Decomposition and synthesis

6 0

4 years ago

Read 2 more answers

he first solution contains 25 % acid, the second contains 35 % acid, and the third contains 55 % acid. She created 100 liters of

photoshop1234 [79]

Answer:

Volume of first solution = 20 Liters

Volume of second solution = 20 Liters

Volume of third solution = 60 Liters

Explanation:

Let the volume second solution used= y

Let the volume of third solution used = 3y

Let the volume of first solution used = 100 - (y +3y)

= 100- 4y

The volume of acid in the first solution ( V₁) = 25% of (100-4y)

= 25-y

The volume of acid in the second solution(V₂) =35% of y

= 0.35y

The volume acid in the third solution (V₃) = 55% of 3y

=1.65y

The Volume of acid in Mixture (V₄) = 45% of 100

= 45

From the conservation of volume:

V₄ = V₁ + V₂ + V₃

45 = (25-y )+ 0.35y + 1.65y

45 =25 -y + 0.35y + 1.65y

45 -25 = y

y = 20

So the volume of first solution used = 100- 4y

= 100- 4(20)

= 20 Liters

So the volume of second solution used = y

= 20 Liters

So the volume of third solution used = 3y

= 3(20)

= 60 Liters

3 0

3 years ago

a compound is found to contain 31.1% sulfur and 68.9% chlorine determine the empirical formula for the sulfur and chlorine sampl

ollegr [7]

Answer:

Empirical formula = S₁Cl₂ = SCl₂

Explanation:

The empirical formula of a compound is the simplest whole number ratio of each type of atom in a compound.

This compound contains 31.1% sulfur and 68.9% chlorine.

That is 100g of the compound contains 31.1 g of sulfur and 68.9 g of chlorine.

Convert the mass of each element to moles using the molar mass from the periodic table.

Moles of Sulfur = $\frac{31.1}{32.065 } \\$

= 0.9699

Moles of Chlorine= $\frac{68.9}{35.453 } \\$

= 1.9434

Divide each mole value by the smallest number of moles calculated.

Units of sulfur = $\frac{0.9699}{0.9699} \\$

= 1

Units of Chlorine = $\frac{1.9434}{0.9699} \\$

= 2

Empirical formula = S₁Cl₂ = SCl₂

8 0

3 years ago

What is the mole fraction of sodium chloride in solution that is 13. 0 y mass sodium chloride and that has a density of 1. 10 g/

lyudmila [28]

Mole fraction is the ratio of the constituent moles to the total constituents. The mole fraction of sodium chloride is 0.0443.

<h3>What is a mole fraction?</h3>

A mole fraction is the proportion of the moles of the component in a total component present.

In 100 gm of solution 13.0 5 means, there is 13.0 gm of sodium chloride present. The mass of water is calculated as,

100 - 13.0 = 87.0 gm

Moles of sodium chloride is calculated as:

$\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{13}{58}\\\\&= 0.224 \;\rm moles\end{aligned}$

Moles of water are calculated as:

$\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{87}{18}\\\\&= 4.83\;\rm moles\end{aligned}$

Now, moles fraction is calculated by dividing moles of sodium chloride by total moles as,

$\begin{aligned} \text{Mole fraction of NaCl} &= \dfrac{0.224}{0.224 + 4.83}\\\\&= 0.0443\end{aligned}$

Therefore, the mole fraction of sodium chloride is 0.0443.

Learn more about mole fraction here:

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7 0

2 years ago

How does knowing the meaning of prefix-trans help you remember what happens to light that strikes a translucent object ?

katovenus [111]

Explanation:

The prefix trans- and its variant tra- mean "across".

A translucent substance allows some light to go "across" it to the other side. Also, think about a transparent substance: it allows light to go "across" it; or a translation, it is a going "across" from one language into another.

6 0

3 years ago