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3 years ago

How do you prove a scalene triangle is a right triangle?

Chemistry

1 answer:

Mrrafil [7]3 years ago

3 0

if all sides are unequal it is scalene and if one angle adds up to 90 while the rest are different youve proven it.

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As the thermal energy of matter increases, its particles usually spread out, causing

sveta [45]

Answer:

As the thermal energy of matter increases, its particles usually spread out, causing the substance to expand.

Explanation:

<em> i have a book about this stuff</em>

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3 years ago

What is the molecular formula for the compound with a formula mass of 58.12 and an empirical formula of c2h5?

LenKa [72]

The molecular formula is C4H10.

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3 years ago

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Vitamin D is created with the help of sun. You need vitamin D to help your body absorb ___________ which is important for the he

matrenka [14]

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Calcium hope it helped

Explanation:

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3 years ago

2Agl+Na2S Ag2S+2Nal is it balanced or unbalanced

lara [203]

<h3>Answer:</h3>

It is balanced

<h3>Explanation:</h3>

The equation, 2AgI+Na₂S → Ag₂S+2NaI, is balanced because the number of atoms of each element is equal on both sides of the equation.
That is, there are two silver atoms, two iodide atoms, two sodium atoms, and one sulfur atom on the right and left the side of the equation.
According to the law of conservation of mass, chemical equations should be balanced for the mass of reactants to be equal to that of the products.

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4 years ago

A 90-m3 basement in a residence is found to be contaminated with radon coming from the ground through the floor drains. The conc

taurus [48]

Answer:

25 minutes

Explanation:

V = Volume = $90\ \text{m}^3$

$C_0$ = Radon concentration under steady state = 1.5 Bq/L

k = Radon decay rate = $2.09\times 10^{-6}\ \text{s}^{-1}$

$Q$ = Venting rate = $0.14\ \text{m}^3/\text{s}$

$C_f$ = Final concentration of radon = 0.15 Bq/L

Theoretical detention time is given by

$\theta=\dfrac{V}{Q}\\\Rightarrow \theta=\dfrac{90}{0.14}\\\Rightarrow \theta=642.86\ \text{s}$

We have the relation

$C_f=C_0e^{-(\dfrac{1}{\theta}+k)t}\\\Rightarrow t=\dfrac{\ln\dfrac{C_f}{C_0}}{-(\dfrac{1}{\theta}+k)}\\\Rightarrow t=\dfrac{\ln\dfrac{0.15}{1.5}}{-(\dfrac{1}{642.86}+2.09\times 10^{-6})}\\\Rightarrow t=1478.25\ \text{s}=\dfrac{1478.25}{60}=24.63\approx 25\text{minutes}$

The time taken to reach the acceptable level of concentration is 25 minutes.

5 0

3 years ago