Answer:
i think that's number D.
The speed of light in a vacuum is 2.998 x 108 m/s. How long does it take for light to circumnavigate the Earth, which has a circumference of around 24,900 miles? Do not enter "seconds" as part of your answer. Watch your Sig Figs!
Answer:
0.13 s
Explanation:
We'll begin by converting 24900 mile to metres (m). This can be obtained as follow:
1 mile = 1609.344 m
Therefore,
24900 mile = 24900 mile × 1609.344 m / 1 mile
24900 mile = 4.01×10⁷ m
Finally, we shall determine the time taken for light to circumnavigate the Earth, this can be obtained as follow:
Distance = 4.01×10⁷ m
Speed = 2.998×10⁸ m/s
Time =?
Speed = distance / time
2.998×10⁸ = 4.01×10⁷ / time
Cross multiply
2.998×10⁸ × time = 4.01×10⁷
Divide both side by 2.998×10⁸
Time = 4.01×10⁷ / 2.998×10⁸
Time = 0.13 s
Thus, it will take 0.13 s for light to circumnavigate the Earth.
How many grams are contained in 19.7 moles of Copper (III) Hydroxide?
Answer:
1912.1893280000002 or rounded to the nearest tenth is, 1912.19
Explanation:
How many moles are present in 63.80L of oxygen gas, O2?
Answer:
2.85moles of oxygen gas
Explanation:
Given parameters:
Volume of oxygen gas = 63.8L
Unknown:
Number of moles = ?
Solution:
We assume that the gas is under standard temperature and pressure. To find the number of moles, use the expression below:
1 mole of a gas at STP occupies a volume of 22.4L
So;
63.8L of oxygen gas will take up a volume of
[tex]\frac{63.8}{22.4}[/tex] = 2.85moles of oxygen gas
Which set of coefficients will balance this chemical equation?
C2H4(g) + _O2(g) → 2C02(g) + 2H2O(g)
Answer:The answer is D.1,3
Explanation:
Polar air masses bring warm temperature and have lower air temperature? T or F
Answer:
t? im pretty sure have a good day
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Which of the following correctly describes molecules of two different gases if they are at the same temperature and pressure?
CA. They must have the same mass.
CB. They must have the same velocity
CC. They must have the same average kinetic energy
CD. They must have the same average potential energy
Answer: C. They must have the same average kinetic energy.
Explanation: I got it right
For the balanced equation 2C6H6OS+1102=12CO+6H2O+2SO3 how many moles of C6H6OS reacted if 0.474 moles of SO3 are produced?
Answer:
0.474 moles of C₆H₆OS
Explanation:
Step 1: Write the balanced equation
2 C₆H₆OS + 11 O₂ ⇒ 12 CO + 6 H₂O + 2 SO₃
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of C₆H₆OS to SO₃ is 2:2.
Step 3: Calculate the moles of C₆H₆OS reacted if 0.474 moles of SO₃ are produced
We will use the previously established molar ratio.
0.474 mol SO₃ × 2 mol C₆H₆OS/2 mol SO₃ = 0.474 mol C₆H₆OS
convert 2.39 x 1022 molecules of water into moles of water
Answer:
[tex]0.0397\ \text{mol}[/tex]
Explanation:
Number of molecules of water = [tex]2.39\times 10^{22}[/tex]
[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]
Number of moles is given by
[tex]\dfrac{2.39\times 10^{22}}{6.022\times 10^{23}}[/tex]
[tex]=0.0397\ \text{mol}[/tex]
The number of moles of water is [tex]0.0397\ \text{mol}[/tex].
If the common element of Fluorine-9 and one of the isotopes is Fluorine-10, what does the -10 tell us about the element and how many protons and neutrons does the element have?
flourine have 9 proton
19 neutrons and 9 electron
mark be a brain list
Select all of the ways collection areas use to gain water. precipitation falls direction into the collection area runoff from precipitation water evaporates from the collection area
"Precipitation falls direction into the collection area" and "runoff from precipitation" are the correct ways.
Ways of collecting waterThe ways such as "Precipitation falls direction into the collection area" and "runoff from precipitation" through which collection areas use to gain water because these two activities bring water to the collection areas
While on the other hand, "water evaporates from the collection area" is the activity which removes water from the collection area so we can conclude that "Precipitation falls direction into the collection area" and "runoff from precipitation" are the correct ways.
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What are zebra mussels?
Answer:
The zebra mussel is a small freshwater mussel.
What is the element in period 3 that required requires the least amount of energy?
In Raoult’s law, what happens to the partial pressure of the solution when the mole fraction of the solvent increases?
Answer: c. it increases
Explanation:
2H2O = 2H2 +O2
If 30mL of hydrogen are produced in above reaction, how many mL of oxygen are produced? Please show work.
Answer:
15 mL of O₂.
Explanation:
The balanced equation for the reaction is given below:
2H₂O —> 2H₂ + O₂
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂ and 1 mL of O₂.
Next, we shall determine the volume of H₂O needed to produce 30 mL of H₂. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂.
Therefore, 30 mL of H₂O will also react to produce 30 mL of H₂.
Thus, 30 mL of H₂O is needed for the reaction.
Finally, we shall determine the volume of O₂ produced from the reaction. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 1 mL of O₂.
Therefore, 30 mL of H₂O will react to produce = (30 × 1)/2 = 30/2 = 15 mL of O₂.
Thus, 15 mL of O₂ were produced from the reaction.
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Answer:
Barb tested the streak and luster.
Explanation:
Pls mark brainliest
Answer:
Mineral size and luster.
Explanation:
describe how plants might be affected if the inter molecular forces in water decreased? i need asap!
Answer:
Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond. Since water has hydrogen bonds, it also has dipole-induced dipole and London dispersion forces.
Hope it helped!!
How many moles are there in 36.0 grams of water?
Answer:
There are 4 moles of hydrogen atoms in 36 grams of water,
Explanation:
Calculate the mass of iron (iii) oxide that contains a trillion iron atoms
Answer:
Calculate the mass of iron(III) oxide (Fe20) that contains a trillion (1.000x 10") oxygen atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. A chemist measures the amount of oxygen gas produced during an experiment. He finds that 9.2 g of oxygen gas is produced.
Explanation:
starting with the idea of isostasy and ending with plate tectonics, explain how scientists understanding of the earth's crust has changed
Plate Tectonics is the study of the movement and changes in the rocks that make up the earth's crust. Isostasy is the equilibrium in the earth's crust maintained by a flow of rock material in the asthenosphere.
The concept behind pre-continental drift was that in addition to the pressure of contraction, isostatic adjustments also caused the crust's heavier portions to sink and its lighter portions to rise. It was believed that the Earth's interior was a viscous fluid that could support this rising and sinking.Wegener put up the theory that continents can move in 1915 based on fossil data, how coasts appeared to fit together, and other traits, but it was not well received at the time.He noticed that rock ages, and mountain belts match up across the boundaries of continents if you put the continents back together as the "jigsaw puzzle fit" proposes.On continents that are currently divided by water, fossils of identical terrestrial flora and animals have been discovered.New data from the ocean floor, including topography and rock magnetism, played a major role in the development of plate tectonic theory in the 1960s.On the basis of symmetrical patterns, seafloor spreading was hypothesized as a mechanism to propel the migration of the continents.Hence this led to scientists understanding of the earth's crust has changed.
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Convert 4.56 g/ml to lb-fl-oz
Answer:
g-lb 0.01005308
ml-fl Oz 0.1541919
The value of 4.56 g/mL is 0.296 lb/fl-oz.
Explanation:
Given:
The density with 4.56 g/mL
To find:
Convert 4.56 g/ml to lb/fl-oz
Solution:
In 1 pound there are 453.592 grams:
[tex]1 pound = 453.592 grams\\1 grams=\frac{1}{453.592 } pounds\\4.56 g/mL=4.56\times\frac{1}{ 453.592} lb/mL\\=0.0100 lb/mL[/tex]
In 1 fluid ounce there are 29.5735 milliliters:
[tex]1 \text{fluid ounce} = 29.5735 milliliter\\1 mL=\frac{1}{29.5735} fl-oz\\0.0100 lb/mL=\frac{0.0100}{\frac{1}{29.5735}} lb/fl-oz\\0.0100 lb/mL=0.0100 \times\frac{29.5735}{1} lb/fl-oz\\=0.296 lb/fl-oz[/tex]
The value of 4.56 g/mL is 0.296 lb/fl-oz.
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How many grams are in 2.2 moles of sodium hydroxide (NaOH)?
Answer:
1 mole is equal to 1 moles NaOH, or 39.99711 grams.
(( hoped this helped ))
Answer:
1 mole is equal to 1 moles Sodium Hydroxide, or 39.99711 grams. Note that rounding errors may occur, so always check the results.
Prepare 800 mL of 2M sodium chloride. How many grams of NaCl needs to be dissolve in a 800 mL distilled water?
Answer:
93.6 g of NaCl.
Explanation:
We'll begin by converting 800 mL to litre (L). This can be obtained as follow:
1000 mL = 1 L
Therefore,
800 mL = 800 mL × 1 L / 1000 mL
800 mL = 0.8 L
Next, we shall determine the number of mole of NaCl in the solution. This can be obtained as follow:
Molarity = 2 M
Volume = 0.8 L
Mole of NaCl =?
Molarity = mole / Volume
2 = mole of NaCl / 0.8
Cross multiply
Mole of NaCl = 2 × 0.8
Mole of NaCl = 1.6 moles
Finally, we shall determine the mass of NaCl needed to prepare the solution. This can be obtained as follow:
Mole of NaCl = 1.6 moles
Molar mass of NaCl = 23 + 35.5
= 58.5 g/mol
Mass of NaCl =?
Mole = mass /Molar mass
1.6 = Mass of NaCl / 58.5
Cross multiply
Mass of NaCl = 1.6 × 58.5
Mass of NaCl = 93.6 g
Therefore, 93.6 g of NaCl is needed.
93,6 grams of NaCl is needed to prepare a 800ml of 2M sodium chloride.
Molar concentrationIn a 2M solution, there are 2 moles of the substance per 1 liter, that is, in 800 ml we have:
[tex]\frac{2 mol}{x mol} =\frac{1000 ml}{800ml}[/tex]
[tex]x = 1.6 mol[/tex]
Thus, 1.6 mol of NaCl is needed to prepare the solution.
Mass calculationTo calculate the mass in an amount of moles, we use the molar mass, so that:
[tex]MM_{NaCl}= 58.5g/mol[/tex]
[tex]m = MM \times mol[/tex]
[tex]m = 58.5 \times 1.6[/tex]
[tex]m = 93.6g[/tex]
So, 93,6 grams of NaCl is needed to prepare a 800ml of 2M sodium chloride.
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Diagram electron configuration of hydrogen (1), sodium (11), K (19) what do they have in common?
They can only hold 2 electrons in the first outershell
Given the Punnett Square above, with Y=dominant yellow allele and y= recessive green allele, what is the probability of an offspring plant having a green phenotype?
Question 5 options:
25% green phenotype
50% green phenotype
75% green phenotype
100% green phenotype
Answer:
50 percent
Explanation:
Considering one heterozygous parent and a homo-zygous recessive parent, the probability of an offspring plant having a green (recessive) phenotype is 50 percent (50%).
What is a Punnett square?A Punnet square is a diagram used to represent the gametic combination that will give rise to a given genotype/phenotype.
In this case, one parent is heterozygous (genotype Yy, carrier of the recessive allele), whereas the other parent is recessive homo-zygous (genotype yy).Here, the Punnett square is equal to:Y y
y 1/4 Yy 1/4 yy
y 1/4 Yy 1/4 yy
In conclusion, considering one heterozygous parent and a homo-zygous recessive parent, the probability of an offspring plant having a green (recessive) phenotype is 50 percent (50%).
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Answer:
Solar energy.
Explanation:
Solar Energy,
Renewable sources are those, which can be used again and again so, solar energy is the answer.
The analysis of data leads to _____.
A. theories
B. variables
C. hypotheses
D. conclusions
Answer: D, Conclusions
Explanation: Gradpoint
Water in the atmosphers is in its gas form and is called water vapor. Where does most of the water vapor in the atmosphere
evaporate from?
Answer:
Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.
many fish, insect, and including the common housefly, produce large amounts of glycerol (C³H³O³) in cold areas to lower the freezing point of their blood. what percent of oxygen is percent in glycerol
A. 52.11% B. 51.11%
C. 53.11% D. 50.11%
Answer:
A. 52.11%
Explanation:
Percentage of Oxygen= (mass of Oxygen in glycerol/ mass of glycerol) x 100
= ((16*3)/ 92.11) x 100
=52.11%
How many moles are in 4.85 x 10^25 atoms of carbon?
Answer:
4.85 x 10^25
Explanation:
thats what i was told by a calculator