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3 years ago

What is the purpose of a unit conversion?

1 answer:

8 0

<em><u>Unit conversion is very important because the rest of the world other than three contries uses the metric system. So, converting unitsis important in science because it uses the metric system. The metric system aremeasurements like cm, m, l, mL, etc.</u></em>

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Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous. ΔH = 147 kJ ΔS = -67.0 J/

lbvjy [14]

Answer:

ΔG for the given system is 28.421 kJ. The system is non spontaneous.

Explanation:

ΔH = 147 kJ =147,000 J= Enthalpy of the system

ΔS = -67.0 J/K = Entropy change

T = 149 °C = 422.15 K = Temperature of the system

((T)°C=273.15 +T K)

ΔG = Gibbs free energy ?

The Gibbs free energy 's expression is given by:

ΔG = ΔH - T ΔS

ΔG > 0 , non spontaneous
ΔG < 0, spontaneous

$\Delta G^o=147,000 J-422.15 K\times (-67.0)$

ΔG = 28,421 J = 28.421 kJ

Since, value of Gibbs free energy is positive this means that reaction is non spontaneous.

5 0

3 years ago

BRAINLIESTTT ASAP!!! PLEASE HELP ME :)

umka21 [38]

Hey Geny :)

I’m pretty sure the answer is B

Hope this helps you

-AaronWiseIsBae

6 0

3 years ago

Read 2 more answers

Minerals are very useful to us. Which of the following is a false statement? Question options: Pyrite is an ore of gold and is u

Andrew [12]

Answer:

Option C= Cobalt is not used in medicine

This statement is incorrect.

Explanation:

Pyrite is an ore of gold and is used in jewelry making (correct statement)

Pyrite:

1. pyrite is yellow brass mineral.

2. its chemical composition is FeS2.

3. it is also called ore of gold

4. it is used in jewelry.

Talc:

Talc is used in paper making, plastics, and paint (correct statement)

1. it is phyllosilicate mineral in the form of sheets.

2. its chemical formula is Mg3Si4O10 (OH)2.

3. it is very important constituent of roofing material.

4. it is used in many industries like paper making, paints, electrical cables, food etc.

Quartz:

Quartz is used to make glass (correct statement)

1. its chemical formula is SiO2.

2. its large amount is used in manufacturing of ceramic and glass.

3. The second most abundant mineral found in the earth crust is also quartz.

Cobalt:

Cobalt is not used in medicine (incorrect statement)

1. Cobalt is widely used in medical field.

2. it is used in the detection of metastasis and tumor.

3. it is used in the replacement of knee and hip as a prosthetic alloys.

Minerals are very important in our daily life. They are widely used in construction material for example in the construction of buildings and roads and also in medical field.

Examples:

1. Copper is used in the electronic and electrical field.

2. Zinc is used in rust resistant metals, skin care creams. rubber paints etc.

8 0

3 years ago

3. A 0.025L solution of HCl is neutralized by 0.018L of a 1.0 M NaOH solution. What is the concentration of the HCl solution?

Nookie1986 [14]

The concentration of the HCl solution is 0.72 M.

<h3>How do we calculate the concentration?</h3>

Concentration of the required solution by the use of the known concentration solution will be determine by using the below equation as:

M₁V₁ = M₂V₂, where

M₁ & V₁ are the molarity and volume of the HCl solution.
M₂ & V₂ are the molarity and volume of the NaOH solution.

On putting values in the above equation, we get

M₁ = (1)(0.018) / (0.025) = 0.72 M

Hence required concentration of HCl is 0.72M.

To know kore about molarity, visit the below link:

brainly.com/question/24305514

#SPJ1

4 0

1 year ago

How many of the planets have an orbital period of less than one Earth year?

GrogVix [38]

Since orbital period depends on how far you are from the sun, planets closer to the sun have a orbital period less than one earth year.

These planets are Mercury and Venus

8 0

2 years ago