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saw5 [17]
3 years ago
10

Why is it useful to model systems that use energy?

Chemistry
1 answer:
Airida [17]3 years ago
7 0

Answer:

Energy modelling can be described as a system to make simulations or computerized models of systems which use energy. This makes it easier to analyze and access such systems which use energy. By this approach, there are lesser chances for the energy to be wasted and fewer chances for any energy-related experiments to go wrong. As such kind of experiments can be dangerous hence it is essential that models be made first.

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Plz help.chemissttrryy<br><br><br><br>​
Gelneren [198K]
Attached is the answer

3 0
2 years ago
A 250-mL aqueous solution contains 1.56 10–5 g of methanol and has a density of 1.03 g/mL. What is the concentration in ppm?
Hoochie [10]
First, calculate for the mass of the aqueous solution by multiplying the given volume (in mL) by the density (in g/mL). In mathematical equation, that is,

        m = ρV

where m is mass, ρ is density, and V is volume. Substituting the known values,

      m = (1.03 g/mL)(250 mL) = 257.5 g

To get the concentration in ppm, divide the given mass of methanol by the mass of the solution. Note that the parts-per million (ppm) is equal to mass of solute in milligram(mg) divided by the mass of solution in kilogram (kg)

      C (in ppm) = (1.56 x 10^-6 g)(1000 mg/1 g)   / (257.5 g)(1 kg/1000 g)

Simplifying,
     C (in ppm) = (1.56 x 10^-3 mg)/ 0.2575 kg

     C (in ppm) = 0.00606 ppm

<em>Answer: 0.00606 ppm</em>
     
7 0
2 years ago
Read 2 more answers
How can you make a solution more saturated?
NNADVOKAT [17]
Heat the solution till all the water molecules are no longer in the solution.
Or add more solute till it stops dissolving.(maximum point of dissolvtion.)
7 0
3 years ago
Describe the many different forms of energy involved with stretching and releasing a rubber band. What other processes are simil
Nadya [2.5K]

Answer:

Conversion of kinetic energy to potential energy (chemo mechanical energy)

In the state of rest, the rubber is a tangled mass of long chained cross-linked polymer that due to their disorderliness are in a state of increased entropy. By pulling on the polymer, the applied kinetic energy stretches the polymer into straight chains, giving them order and reducing their entropy. The stretched rubber then has energy stored in the form of chemo mechanical energy which is a form of potential energy

Conversion of the stored potential energy in the stretched to kinetic energy

By remaining in a stretched condition, the rubber is in a state of high potential energy, when the force holding the rubber in place is removed, due to the laws of thermodynamics, the polymers in the rubber curls back to their state of "random" tangled mass releasing the stored potential energy in the process and doing work such as moving items placed in the rubber's path of motion such as an object that has weight, w then takes up the kinetic energy 1/2×m×v² which can can result in the flight of the object.

Explanation:

5 0
2 years ago
Read 2 more answers
1. Calculate the molar mass of sucrose (C12 H11 O22)?
ohaa [14]

Answer:

=342g

Explanation:

atomic mass of C = 12g

atomic mass of H =  1g

atomic mass of O = 16g

Solution;

    C12 H22 O11

= 12 (12) + 22 (1) + 11(16)

= 144+ 22 + 176

= 342g

4 0
2 years ago
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