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3 years ago

I need help TnT

Chemistry

2 answers:

Slav-nsk [51]3 years ago

7 0

Explanation:

I don't think human beings will ever extinct

cause they are smart and adaptive

hodyreva [135]3 years ago

5 0

<h3>in MY OPINION</h3>

Q1. I don't know the future but I would say that Humans will not become extinct because of diseases and pandemics.

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The amount of energy released when 50.0 kg is converted into energy is x 10A. A:

astra-53 [7]

Answer:

The amount of energy released when 50.0 kg is converted into energy is

4.50 x 10A.

A: 18

8 0

4 years ago

he Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In th

Vika [28.1K]

Answer:

148.2 g of H20

Explanation:

Equation of reaction: 4NH3 + 5O2 ---> 4NO + 6H20

From the equation above, 4 moles of ammonia reacts with 5 moles of oxygen gas to produce 6 moles water.

Molar mass of NH3 = 17 g/mol;

Molar mass of O2= 32 g/mol;

Molar mass of H2O = 18 g/mol

First, we determine the limiting reactant:

4*17 g of NH3 reacts with 5*32 g of O2

Mass Ratio = 68 : 160

Therefore, NH3 is the limiting reactant.

68 g of NH3 reacts to produce 6* 18 g of H20 = 108 g of H2O

93.3 g of NH3 will react to produce (93.3 * 108)/68 g of H20 = 148.2 g of H2O

Therefore, the maximum amount of H2O produced = 148.2 g

7 0

3 years ago

What school objects in a class have organic compounds

Elenna [48]

mostly anything

like wood carpet

4 0

3 years ago

If a buffer solution is 0.120 M in a weak acid (Ka = 2.0 × 10-5) and 0.440 M in its conjugate base, what is the pH?

Helen [10]

-log ka=pH - log ([A-]/[HA])

3 0

3 years ago

After creating a Beer's Law plot using standard solutions of Q, you determined the slope of Beer's Law to be 0.598 M-1. Your unk

Mashutka [201]

Answer:

$C=0.247~M$

Explanation:

We have to start this question with Beer's Law, $A=E*b*C*$ . On this equation we will have:

A=Absorbance

E=Molar absorption coefficient

b= Optical path

C=Concentration

So, the question is: what values of this equation we know?. If we check the question we have the absorbance value "0.148" additionally we have the slope of the plot, this slope is the molar absorption coefficient, therefore E=0.598 M-1, finally we have also the optical path. The optical path is 1 cm for all devices, so b=1 cm. With all these values we can calculate the concentration "C".

$C=\frac{A}{b*E}$

$C=\frac{0.148}{1*0.598}$

$C=0.247~M$

So, we will have a concentration of 0.247 M

I hope it helps!

4 0

3 years ago