Chemical ____ are used to represent compounds
2 answers:
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1. The bar of metal is not pure gold.
2. The volume of 50.0 g of air is 42,016 mL.
3. The mass of the pure aluminum is 135 g.
4. The light beam's wavelength in meters is 475 x m.
The density of a substance is the ratio of the mass of the substance and its volume.
Density = mass/volume.
For the first problem: mass = 57.3 g, volume = 4.7 cm3
Density of the metal = 57.3/4.7
= 12.19 g/cm3
The density of gold is 19.3 g/cm3. Thus, the bar of metal is not pure gold.
For the second problem: density = 1.19 x g/ml, mass = 50.0 g
Volume = mass/density
= 50/1.19 x
= 42,016 ml
The volume of 50.0 g of air is 42,016 mL.
For the third problem: density = 2.70 g/ml, volume = 50.0 ml.
Mass = density x volume
= 2.70 x 50
= 135 g
The mass of the pure aluminum is 135 g.
Lastly:
nano =
475 nm = 475 x m
The light beam's wavelength in meters is 475 x m.
More on density can be found here: brainly.com/question/15164682
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Answer:
Both weak interaction and strong interaction act only between non-atomic particles.
Explanation:
Arrange the four fundamental forces in increasing strength:
- Gravity,
- "Weak" interaction,
- Electromagnetic interaction, and
- Strong interaction.
Thus, this question is about the strong and weak interactions. In particular, the choices are concerned about properties common to both types of interactions.
- The ranges of electromagnetic interaction and gravity are infinite. However, the ranges of strong and weak interactions are much smaller. The maximum range of weak interactions is around
. The maximum range of strong interactions is around
.
- Weak interaction occurs between left-hand fermions. This class of particles includes neutrinos, which do not carry any charge. The most energetic strong interactions occur between quarks, which are all charged. Some of the weaker residual strong interactions occur between particles that are made of quarks. That includes both protons and neutrons (which do not carry any charge.) This type of strong interaction holds nuclei intact.
Consider the choices:
- The range of neither weak nor strong interactions is infinite. This range is smaller than the radius of atomic nuclei.
- Strong and weak interactions indeed act between charged particles. However, there are exceptions such as neutrinos and neutrons.
- The ranges of strong and weak interactions are so small that they are nearly undetectable outside of atomic nuclei. Both interactions act only between non-atomic particles such as protons and neutrons as well as electrons and quarks.
- Atoms are too large to experience weak and strong interactions.