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1. Write a paragraph of 3 lines on how a rainbow form
Answer:
Explanation:
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the Sun.
Calculate the wavelengths of the following objects:
Part 1 (1 point)
See Periodic Table See Hint
a muon (a subatomic particle with a mass of 1.884 x 10-25 g) traveling at 340.0 m/s
nm
Part 2 (1 point)
an electron (me = 9.10939 x 10-28 g) moving at 4.15 x 106 m/s in an electron microscope
nm
Part 3 (1 point)
an 82.0 kg athlete running a "4-minute mile" (i.e. 4.00 min/mile)
x 10-25
nm
Part 4 (1 point)
Earth (mass = 6.00 x 10278) moving through space at 3.20 x 10m/s
x 10
nm
all of the atoms of the elements in group 4 have 4 valence electrons
True or false
Answer:
That is true
Explanation:
The group determines the valence electrons in the outer shell , the period determines the number of energy levels.
Major parts of the microscope that provides light to the microscope
Answer:
Explanation:
Illuminator. is the light source for a microscope, typically located in the base of the microscope. Most light microscopes use low voltage, halogen bulbs with continuous variable lighting control located within the base.
a. Calcular el porcentaje en masa de una disolución que
contiene 20 g de azúcar en 280 g de agua:
Answer:
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Explanation:
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If Frank creates 20 waves every 10 seconds, then how many waves does he create EVERY SECOND?
Answer:
2 waves
Explanation:
If Frank creates 20 waves every second then the way you solve is turn it into a proportion 20 waves/10 secs = x/1 sec which then turns into the equation of 10x=20 where x=2 hence Franks creates 2 waves every second.
what is the mass in grams of 0.250 mol of the common antacid calcium carbonate?
Answer:That's 25.8 g of calcium carbonate In 100 g of the sample.
Explanation:
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why is water able to easily dissolve ionic compounds?
Answer:
To dissolve an ionic compound
Explanation:
the water molecules must be able to stabilize the ions that result from breaking the ionic bond. They do this by hydrating the ions. Water is a polar molecule. ... When you place an ionic substance in water, the water molecules attract the positive and negative ions from the crystal.
If you combine sodium(Na) and chlorine(Cl) to make sodium chloride how many atoms of each will you need? Explain
Answer:
I don't understand but I can tell u this:
Na has one extra valence electron and Cl has one missing one. Chemical reactions and forming of compounds is all in the electrons and not the nucleus. So, when highly reactive Na mixes with Cl, they form a stable compound called NaCl, or table salt.
If we are making one molecule of sodium chloride, we need one sodium atom and one chlorine atom. The formula of sodium chloride is NaCl.
What is sodium chloride?Sodium chloride is an ionic compound formed by the combination of sodium and chlorine atoms. One molecule of sodium chloride contains one sodium and one chlorine atom to form NaCl. Now if we are making one mole of NaCl, we need 6.022 × 10²³ atoms of each element.
Sodium is a metal and possess extra one electron in its valence shell. Chlorine have 7 valence electrons thus, it needs one more electron to attain octet. Sodium donates its electron to chlorine and gains a positive charge.
Chlorine gains a negative charge by accepting the electron from sodium. This opposite charge clouds undergo electrostatic force of attraction. And thus, it an ionic bond forms between them.
To find more on NaCl, refer here:
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Which is greater: the number of atoms in one mole of calcium, or the number of molecules in one mole of carbon dioxide (CO2)?
The number of atoms in one mole of Calcium and one mole of Carbon Dioxide is the same.
How to know the number of atoms?The number of atoms is determined by Avogadro's number (a constant number that determines the atoms per mole).
Avogadro's number is equivalent to 6.02 x 10²³ atoms.
This means one mole of each element contains 6.02 x 10²³. However, this number of atoms changes according to the amount of the substances or moles.
How many atoms does 1 mole of Calcium and 1 mole of Carbon Dioxide contain?
Considering these are two different substances but the number of moles is the same (1 mole each) the number of atoms is equal to Avogadro's number or 6.02 x 10²³ atom.
Learn more about atoms in: https://brainly.com/question/13981855?referrer=searchResults
The limitation of Bohr's model is that electrons do not actually move in
Answer:
The Bohr atomic model did not make correct predictions of large- sized atoms and provided sufficient information only for smaller atoms.
A woman is swimming across a cold lake. Her body temperature is 98 degrees and the lake water is 60 degrees. Which has more thermal energy, the woman or the lake? Explain your answer!
I think the lake because of how heat is transferred or something. Just check out the first law of thermodynamics.
Answer:
the woman
Explanation:
Which common substance is an acid?
Question 3 options:
water
bleach
vinegar
baking soda
Explanation:
vinegar or acetic acid is an acid
La serie de Lyman se situa en la region ultravioleta del espectro. ¿Que linea quedara mas cerca de la zona visible del espectro? Explica por qué.
Answer:
Lyman series of hydrogen atom lies in the ultraviolet region, Balmer series lies in visible region, Paschen series lies in near infrared region whereas Bracket, Pfund as well as Humphrey series lie in far infrared region of electromagnetic spectrum.
I DESPARATELY NEED HELP PLSSSS
Answer:
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Explanation:
Please help me.... someone deleted my question before so I'm trying again.
Answer:
See Explanation.
Explanation:
Element Name: Neon (check a periodic table)
Atomic Number: 10 (number of protons)
Atomic Mass: 20 (number of protons + number of neutrons [electrons have negligible mass])
Protons: 10 (P in the black circle)
Electrons: 10 (number of red dots)
Neutrons: 10 (N in the black circle)
Valence Electrons: 8 (number of red dots on the outermost ring)
If you have any questions, let me know!!
9.56 x 105 cg is how many grams?
100 centigrams = 1 gram
about chemistry notes
Answer:
what about chemistry notes?
Explanation:
How do gas laws predict absolute zero?
Answer:
If a gas contracts by 1/273 of its volume for each degree of cooling, it should contract to zero volume at a temperature of –273°C; this is the lowest possible temperature in the universe, known as absolute zero.It appeared that an “ideal gas” at constant pressure would reach zero volume at what is now called the absolute zero of temperature. Any real gas actually condenses to a liquid or a solid at some temperature higher than absolute zero. Therefore, the ideal gas law is only an approximation to real gas behaviour.
When compared to the standard hydrogen electrode, zinc has a reduction potential of -0.762 volts and copper a reduction potential of + 0.342 volts. What is the reduction potential when zinc and copper are connected to one another?
+0.420 volts
-0.420 volts
+1.104 volts
-1.104 volts
Answer:
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please help me
convert 12,800 ounces to kg.
I need a solved problem!
Two reactants, each having a mass of 50.0 g, react fully in a beaker. What is the total mass of the products in the reaction?
Answer:
100g......sieiekeskslapaokdkz
Will give brainliest and 20 points if you help!
Answer:
135 kPa
Explanation:
Why
would scientists synthesize natural resources
Answer:
so that the can keep reusing it and reusing it instead of wasting materials
Explanation:
you very welcome have a good day
What is the balanced chemical equation for the combustion of sulphur
Answer:
S+O2⇒SO2
Explanation:
Answer:
The balanced equation is S + O2 → SO2
Sodium belongs to Group I and Period 3 of the Periodic Table and iodine belongs to Group VII and Period 5. Based on this information, what can you tell about the atoms of sodium and iodine?
Explanation:
Sodium is a highly reactive metal since it has 1 valence electron, while Iodine is a less reactive non metal with 7 valence electrons.
is the freezing of mercury reversible or irreversible
Answer:
reversible
Explanation:
The freezing of mercury is reversible because solid mercury can be melted.
Carmen has a sample of matter. It is clear and smells sour. The sample is also thick but it flows when poured.
Carmen has a sample of matter. It is clear and smells sour. The sample is also thick but it flows when poured.
Which is the best conclusion about Carmen’s sample?
It is a liquid because it is clear.
It is a liquid because it flows.
It is a solid because it is thick.
It is a solid because it smells sour.
Answer:
Explanation:
Answer:
Its a liquid cause it flows
Explanation:
think about it none of the others make sense ice is a solid and its clear
something like a wall can be thick but it doesn't flow
What is the primary source of light energy?
Question 2 options:
lightening
moon
electricity
the sun
Answer:
moon the sun.............hope it helps.......
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Answer:
I believe it is B.
Explanation:
because an element is a for sure pure substance and I am sure a compound is too. I appologize if I am wrong.