Answer:
C4H8
Explanation:
First find the molar mass of CH2;
2(1.01) + 1(12.01) = 14.03g
Now divide the molar mass of the compound by the molar mass of CH2;
56g/14.03g = 3.9914 Round to nearest whole number = 4
Multiply CH2 by 4 to get the molecular formula;
CH2* 4 = C4H8
Answer:
C4H8
Explanation:
calculate the amount of grams each formula turns out to be
C5 = 60.05g well C5 is already larger than 56g so its not A
C4= 48.04g and H8= 8.08g, 48.04 + 8.08 = 56.12 so this is really close to our answer
C3 = 36.03g and H6= 6.06g, 36.03 + 6.06 = 42.09
C2 = 24.02g and H4 = 4.04g, 24.02 + 4.04 = 28.06
so the answer would be C4H8
Someone drops a book on the floor, and it makes a loud noise. At that time, you turn to look at the person who dropped the book. Turning and looking at the person who dropped the book is an example of a…
A. Phototropism
B. Response
C. Hydrotropism
D. Stimulus
Answer:
D
Explanation:
Do you think MgO has a higher or lower
melting point than NaCl? Why?
Answer:
Magnesium Oxide (MgO) has a higher melting point than Sodium Chloride (NaCl) which is around 2,800 degrees Celcius. This is because its Mg2+ and O2- ions have a greater number of charges, and so form stronger ionic bonds, than the Na+ and Cl– ions in Sodium Chloride.
when two or more atoms are combined it is called a ?
Answer:
Elements can be chemically combined into compounds, therefore, a compound consists of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining atoms of their constituent elements by ionic bonds or by covalent bonds.
What is the mass (g) of 6.50 moles of water (H2O)? While using moleconversion
Answer:
Mass = 117 g
Explanation:
Given data:
Moles of water = 6.50 mol
Mass in gram = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of water = 18 g/mol
Now we will put the values in formula.
6.50 mol = mass/ 18 g/mol
Mass = 6.50 mol×18 g/mol
Mass = 117 g
Lewis diagrams of molecules of three different hydrocarbons are shown above. Which of the following claims about the molecules is best supported by the diagrams?
Answer:
D
Explanation:
Seeing the Lewis formula for each of the molecules, we can attempt to write the condensed structural formula for each.
What we notice is that while there are purely single bonds between the carbon atoms in the first molecule, there is a double bond in the second molecule and a triple bond in the third
What we can deduce from this is that these are alkanes , alkenes and alkynes
The alkynes have the strongest of the three bonds and thus they have the strongest bonds in the mix
Since molecule 3 is an alkyne, then we can say that it has the strongest of the bonds
The correct claim about the molecules that best supports the diagrams is :
( D ) The strongest carbon to carbon bond occurs in molecule 3
The first molecule ( molecule 1 ) is an alkane because the molecule is made up of only single bonds connecting the carbon atoms.
while the second mole ( molecule 2 ) is an alkene because of the presence of a double bond connecting carbon atoms.
and the third molecule ( molecule 3 ) is an alkyne because of the presence of a triple bond connecting carbon atoms.
Therefore Alkynes have the strongest of of bonds between its carbon atoms because of the presence of a triple connecting carbon atoms.
Hence we can conclude that The strongest carbon to carbon bond occurs in molecule 3
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what is the factor that changes the reaction rate in the following example and why:
More concentrated detergents wash better.
Answer:
Concentration of the detergents
Explanation:
The factor that changes the reaction is the concentration of the reacting detergent.
Here are some factors that influences the rate of reaction;
Nature of reactantsConcentration of the reactants or pressure Temperature Presence of a catalystSunlightThe reaction rate is directly proportional to the concentration of the reactants.
Here since we have a more concentrated detergent, its reaction rate will be higher than normal and it will wash better.
Please answer quick
2. Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g ofSubstance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring both beakers, there is a small pile Substance A at the bottom of the first
beaker. None of Substance B is visible in the second beaker. Which of the following statements is true?
A. Substance A is less soluble in water than Substance B.
B. Substance A is more soluble in water than Substance B.
C. Substance A is not soluble in water,
D. Substance B is not soluble in water,
Answer:
A. Substance A is less soluble in water than Substance B.
Explanation:
Solubility: The term "solubility" is described as a specific property determining the capability of a particular solute, substance to get dissolve in a "solvent". Thus, solubility is being measured with respect to the "maximum amount" of a specific solute that is dissolved or mixed in a solvent at "equilibrium". After the given process, the resultant solution is referred to as a saturated solution.
In the question above, the correct answer is option-A.
what bond is Mg3(PO4)2
A container of gas has a volume of 280 mL at a temperature of 22 Celsius if the pressure remains constant what is the volume 44 Celsius?
Answer:
300.9mL
Explanation:
Given parameters:
V₁ = 280mL
T₁ = 22°C
T₂ = 44°C
Unknown:
V₂ = ?
Solution:
To solve this problem, we apply Charles's law;
it is mathematically expressed as;
[tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]
We need to convert the temperature to kelvin;
T₁ = 22°C = 22 + 273 = 295K
T₂ = 44°C = 44 + 273 = 317K
Input the parameters and solve;
[tex]\frac{280}{295}[/tex] = [tex]\frac{V_{2} }{317}[/tex]
V₂ x 295 = 280 x 317
V₂ = 300.9mL
1. A sodium ion has 11 protons and 10 electrons. What is its charge?
+1
If sodium loses an electron, it now has 11 protons, 11 neutrons, and only 10 electrons, leaving it with an overall charge of +1. It is now referred to as a sodium ion.
What is the total number of hydrogen atoms contained in one molecule of (NH4)2C204?
6
8
4
2
Answer:
=8 atoms
Explanation:
In (NH4)2C2O4 there are four moles of Hydrogen in the compound (NH4), but there two molecules of (NH4) in this compound. That's what the 2 in (NH4)2 means, so multiply 4 x 2 = 8.
Hope this helps (:
which element would most likely be a shiny solid at room temperature and a good conductor of electricity?
a. Co
b. I
c. F
d. Cl
Answer:
A
Explanation:
rest are nonmetals and they are not shiny
I WILL MARK BRAINLIST TO WHOEVER SHOWS FULL STEPS PLEASE LOOK AT THE IMAGE ABOVE
Answer:
+47°C
Explanation:
ΔT means change in temperature. If the change is positive, it means that heat was added and the temperature went up.
ΔT = final temp - initial temp
ΔT = 86°C -39°C = + 47°C
How much energy is required to heat 23 grams of iron from 1150 degrees celsius to 2000 degrees Celsius? The melting point of iron is 1538 degrees celsius and the specific heat capacity is 0.444 J/g*C when it is in a solid and 0.450 J/g* C when it is liquified. Latent heat of Fusion of iron is 13.8kj/mol and Latent Heat of Vaporization of iron 349.6 kj/mol
Answer:
150000 degrees
Explanation:
Which of the following suggests a chemical change took place? *
A.The substance is smaller than it was before the change took place.
B.A new substance has formed.
C.The substance looks the same as it did before the change took place.
D.The substance has been shaken up.
Answer:
A
Explanation:
Because it got smaller so that mean it had a chemical reaction
what is called when a paragraph studies data carefully
✅Paraphrasing and summarizing .✅
IamSugarBee
How many joules of heat are absorbed when 70.0 grams of water is completely vaporized at its boiling point ?
Answer: The answer would be 158,200
A trucker is driving from New Jersey to California to make a delivery of couches. He forgets to adjust the pressure of his tires before his trip and end up blowing out two of his tires while driving through Arizona. Whose law does this example depict? What does this law state? Use the law to explain what happened to the tires.
Answer:
Gay-Lussac's law.
Explanation:
According to Gay-Lussac's pressure law, it states that the pressure of a given mass of gas is directly proportional to the absolute temperature of the gas, the assumption that the volume is kept constant.
Hence, the trucker's tires were blown up because they were under high pressure as he drove from New Jersey to California, as a result of this intense pressure the temperature of the air in the tires began to rise and it directly affected the pressure of the gas in the tires' tubes which also increased to a point that they ended up blowing out, obeying Gay-Lussac's law.
10. How many molecules in this chemical equation?
3(OH)2 A 3, B 6, C 7, D 2
Answer:
B, 6
Explanation:
How are the atoms in an object affected when the temperature of the object increases? *
They join together.
They vibrate faster.
They vibrate slower.
They split apart.
Which best explains how photosynthesis is helpful to humans? OIt reduces the amount of harmful rays released by the sun. O It increases the levels of carbon dioxide in the air. O It provides oxygen for humans to breathe. OIt produces proteins, which humans can eat.
Answer:
C. sorry i am late :)
Explanation:
During photosynthesis, plants intake carbon dioxide from the air and releases oxygen. Thus, they are providing enough oxygen available for humans to breath.
What is photosynthesis?Photosynthesis is a bio-chemical process by which green plants produces chemical energy with the aid of light energy absorbed by chlorophyll. Photosynthetic reaction is the combination of carbon dioxide and water giving molecular oxygen and glucose.
Through photosynthesis, the amount ox oxygen and carbon dioxide in the atmosphere is balanced. This balancing cycle involves respiration of animals also.
The carbon dioxide that we exhale are up taken by plants and converts to oxygen gas. This makes sufficient oxygen for all animals to breath. Therefore, photosynthesis is a stage in carbon cycle and oxygen cycle.
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A brief explanation to this question: "Why are neon signs/fireworks different colors? Please help me. Do not look up internet
Answer:
when lit, the atoms of different chemical compounds inside the firework absorb energy, when the electrons fall back to lower energy levels, they give off colored light. Depending upon the chemical used, different colors are produced. neon lights or signs are glass tubes filled with neon gas. When the light is plugged in, the electrical energy causes the electrons of neon to jump to higher energy levels, when they go to lower levels, colored light is given off. The neat thing is that the neon never gets used up. The only thing that gets used up is the electricity. The electrons don't get destroyed and can be used over and over again jumping levels. Neon glows with an orange light, but you know that neon signs can be lots of different colors. The variations come when different gases other than neon are used such as argon, or krypton or when the tube is painted so that with the light produced it produces a certain color.
Explanation:
After being excited by high levels of electrical energy (as in neon signs) or heat energy, various elements and molecules will emit their own specific colors of light.
What are basis behind fireworks?Metals burn in a variety of colors. When a copper compound is lit, for example, the flame is blue-green.
Calcium burns red, while potassium burns purple. Metals are combined to produce various colors in fireworks.
The appearance of each firework is determined by the type of stars it contains, as well as the size and quantity of these pellets.
Some stars contain metal salts, which produce brilliant colors, while others contain a variety of chemical compounds that produce dazzling light effects such as strobing, sparkling, and others.
Various elements and molecules will emit their own specific colors of light after being excited by high levels of electrical energy (as in neon signs) or heat energy (as in the fireworks).
Thus, the neon signs or fireworks provide different colors.
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TRUE OR FALSE!!
All solids have a closely packed, fixed arrangement of particles.
A. True
B. False
this is a test, help!!
Answer:
false
Explanation:
jk true
Is it possible for a rock to be shaped by forces in the Earth. This picture could be described as a/an
Answer: Yes
Explanation:
Different force on earth such as wind ocean currents etc make the rocks in earth crests to be change in their shape and size and they moves to different plates.
What is rock cycle?Rock cycle is the process by which rocks are transforming from one type to the other by the action of wind, water etc.The land is eroded and shaped by wind, water, and ice.
The landscape is dramatically and frequently violently altered by volcanic activity and earthquakes. And over a much longer period of time, the shifting of the earth's plates gradually rearranges the continents and oceans.
These mechanisms all have an impact on the Arctic and Antarctica. We'll go through each in general and in relation to the polar areas specifically.
The three main causes of erosion, or the carrying away of rock, silt, and soil, are wind, water, and ice. Weathering, or the physical or chemical degradation of the minerals in rock, is separated from erosion.
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PLZ ANSWER WILL GIVE BRAINLIEST ASAP
Given the data below, what substance does not show a reaction for any of the tests? Hint: (+)= reaction occurred, (-)= no reaction
unknown
salt
Corn starch
Gelatin
Answer:
Salt
Explanation:
It has all -
Which of the following is a mineral?
coal
ling
glass
brick
salt
How many energy levels does the element helium have?
I appreciate the help!
Please try your best to answer this!
Answer:
Element Helium have 2 energy levels.
Explanation:
HELIUM - With the symbol He and the atomic number 2, helium is a chemical element. It is a colorless , odorless, tasteless, non-toxic, inert, monatomic gas that is the first in the periodic table in the noble gas group. Of all the elements, its boiling point is the lowest.
At about 24 % of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined, it is present. In both the Sun and Jupiter, its abundance is identical to this. This is due to helium-4's very high nuclear binding energy (per nucleon) with respect to the next three elements following helium.
Hence , the answer is 2 energy levels in Helium atom.
11) Look at the phenotypes of Beyonce and
Jay Z. If these two had children, could they have
children with a widow's peak? Why or why not? Use
a Punnett Square to explain your answer.
Help me please
Answer:
No
Explanation: Neither has the dominant trait for Widow's peak, so they're both aa
Mr. Knowlton loves to throw a football around for fun. In the
summer, he and his brothers bought a new ball that was in perfect
condition. However, in the winter they noticed that the ball was not
the same. It seemed to have less volume even though there were no
leaks in the ball! Why?
HELPPP PLEASEEE!!! calculate the energy of radiation with a wavelength of 432 nm
