The amount of solute needed is concentration.
The planet that would have a diameter of approximately 12 cm is Saturn.
<h3>What is a scale model?</h3>
A scale model is a model which is used to represent another object using a given scale.
Scale models can be used to make small object bigger or larger objects smaller.
Considering the scale model of the planets where 1 centimeter (cm) is equal to 10,000 kilometers (km);
1 centimeter = 10,000 kilometers
12 centimeter = 1.2 × 10⁵ kilometers
The planet with a diameter of approximately 1.2 × 10⁵ kilometers is Saturn.
In conclusion, scale models are used to model objects.
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Answer: See below
Explanation: a. The mass of an element is composed of:
protons: 1 amu each
neutrons: 1 amu each
electrons: 0 amu each
Only the protons and neutrons are counted in the atomic mass of an element
b. Electrons are assigned a mass of 0. They do have a mass, but it is exceedingly small compared to the protons and neutrons, so they are left out of the calculation of an element's mass.
c. An element becomes unstable if the neutrons exceed the protons by a certain ratio, dependent on the element.
This difference in environments inside and outside of cells is important, and living organisms need to maintainthese cellular barriers for growth, reproduction, and homeostasis, which is the ability to maintain stable, constant internal conditions.
Answer: 0.087 grams will produce 1620.J of heat.
Explanation:
Amount of heat released when 1 gram of reactant is consumed= 18.5 kJ = 18500 J (1kJ=1000J)
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number
of particles.
Thus we can say:
18500 J is released by consumption of reactant = 1 gram
Thus 1620 J is released by consumption of reactant = ![\frac{1}{18500}\times 1620=0.087](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B18500%7D%5Ctimes%201620%3D0.087)
Thus mass of reactant that will produce 1620 J of heat is 0.087 grams