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tekilochka [14]
3 years ago
14

How important is economic in your everyday life

Chemistry
1 answer:
docker41 [41]3 years ago
3 0

Answer:

it is mega important.

Explanation:

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In a coffee-cup calorimeter, 1.60 g of NH4NO3 was mixed with 75.0 g of water at an initial temperature of 25.008C. After dissolu
jekas [21]

Answer:

Explanation:

mass of the solution m = 1.6 + 75 = 76.6 g

fall in temperature = 25 - 23.34 = 1.66°C

heat absorbed = mass x specific heat x fall in temperature

= 76.6 x 1.66 x 4.18

= 531.5 J .

= .5315 kJ .

mol weight of ammonium nitrate = 80 g

heat absorbed by 1.6 g = .5315 kJ

heat absorbed by 80 g or one mole = 26.575 kJ

enthalpy change ΔH = +26.575 kJ

b )

enthalpy of hydration = 2630 kJ / mol

lattice energy = enthalpy of hydration + enthalpy change

= 2630 + 26.575

= 2656.575 kJ  .

7 0
3 years ago
Which of the following metric prefixes are not one multiple of ten when moving forward or backward between prefixes?
velikii [3]

The metric prefixes which is not one multiple of ten when moving forward or backward between prefixes is: none of the above

Option c is the correct answer

<h3>What is metric prefix?</h3>

A metric prefix simply refers to a unit prefix that precedes a basic unit of measure to indicate a multiple or sub-multiple of the unit.

So therefore, the metric prefixes which is not one multiple of ten when moving forward or backward between prefixes is: none of the above

Complete question:

Which of the following metric prefixes are not one multiple of ten when moving forward or backward between prefixes?

a. micro

b.nano

c. none of the above

Learn more about metric prefix:

brainly.com/question/2050691

#SPJ1

8 0
2 years ago
Which of the following correctly describes solid, liquid, and gas states of matter?
Alenkinab [10]

Explanation:

In solids, the particles are tightly packed together. In liquids, the particles have more movement, while in gases, they are spread out. Particles in chemistry can be atoms, ions or molecules. It is important to understand the particle nature of matter.

4 0
4 years ago
Which statement best explains why heating a liquid affects its viscosity?
Artyom0805 [142]

Answer:

A

Explanation:

took test I'm pretty sure and found respond else where

5 0
3 years ago
Read 2 more answers
I need half reactions, for the following equation.
zhuklara [117]
Answer : Half reaction is defined as the reaction which will be <span>either the oxidation or reduction </span>reaction<span> of particular species in a given redox </span>reaction<span>.

So as per the definition in the reaction of,

</span>Ba + ZnSO_{4}  ----\ \textgreater \  BaSO_{4}  + Zn
<span>
</span>Ba_{(s)} + Zn ^{+2} + SO_{4}^{-2} = Ba^{+2} + SO_{4}^{-2} + Zn_{(s)}
<span>
here on left and right side </span>SO_{4}^{-2} will get cancelled.

and we will get, Ba_{(s)} + Zn ^{+2}  = Ba^{+2} + Zn_{(s)}

Here, 
Ba_{(s)} ----\ \textgreater \  Ba^{+2} - 2e^{-} ...this is oxidation reaction as Ba is getting reduced to Ba^{+2} by losing 2 electrons.

whereas,on the other hand,  Zn ^{+2} ----\ \textgreater \  Zn_{(s)} + 2e ^{-}...this is reduction reaction as Zn ^{+2} is getting reduced to Zn by gaining 2 electrons.

8 0
3 years ago
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