Answer:
30 miles
Explanation:
Just add the numbers.
What is the active element in most photovoltaic cells?.
Answer:
if you mutliply 8x2 it would be 16 and half of 16 is 8 and if you multiply that by 2 you get 16 again and then if you multiply that by 2 it comes out to 32 then devide that by 2 and you get 16 then divide again and you get 8
Explanation:
Answer:
silicon is the most common semiconductor used in computer chips
can someone tell me what 2200 kg is
Answer:
4850.17
for an approximate result, multiply the mass value by 2.205
Explanation:
2200 Kg is an weight which is going to be 4850.17 pounds.
Kg is the unit and 2200 the amount of that unit. If your question wasn't that(looks like you might have missed something) then please put a comment so I can give you a better answer.
what is gold in the periodic table?
Symbol: Au
Atomic Number 79
Electron number: 79
State at room temperature: solid
What is the name of this hydrocarbon? a chain of 3 carbon atoms, with h bonded to each end of the chain and below each c. h is also bonded above the first and third c; the center is bonded to another c, which in turn is bonded to 3 h. 1-methylbutane 2-methylbutane 2-methylpropane 3-methylpropane
The correct IUPAC name for this compound as described here is 2-methylpropane.
What is IUPAC nomeclature?The term IUPAC nomeclature refers to the generally accepted pattern for the naming of compounds. The international Union of Pure and applied chemistry (IUPAC) provides the guidelines for naming compounds. This system of nomenclature helps us to be able to write the unique name of a compound from its structure.
In the system of IUPAC, the parent name is the longest chain in the compound. The substituents are then given numbers in alphabetical order.
Now, the correct IUPAC name for this compound as described here is 2-methylpropane.
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Answer:
2-methylpropane
Explanation:
right on edge2022
Nobelium-254 has a half life of 3 seconds. How many half-lives would have to occur to
reduce a 15g sample down to 0.09375g?
the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g is 7.3
To calculate the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g, we use the formula below.
Formula:
2ⁿ = R/R'........... Equation 1Where:
n = Number of half-lives that have occuredR = Original mass of Nobelium-254R' = Mass of Nobelium-254 after decayFrom the question,
Given:
R = 15 gR' = 0.09375 gSubstitute these values into equation 1
2ⁿ = 15/0.093752ⁿ = 160n = log160/log2n = 7.3 half-livesHence, the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g is 7.3
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Distinguish between an acidic and a basic oxide.
(Select all that apply.)
1. In a basic oxide, element forms ionic bonds with oxygen.
2. A basic oxide is an oxide that reacts with bases.
3. A basic oxide is an oxide that reacts with acids.
4. In a basic oxide, element forms covalent bonds with oxygen.
5. An acidic oxide is an oxide that reacts with acids.
6. In an acidic oxide, element forms ionic bonds with oxygen.
7. In an acidic oxide, element forms covalent bonds with oxygen.
8. An acidic oxide is an oxide that reacts with bases.
Answer:
See below ~
Explanation:
Basic oxides
In a basic oxide, element forms ionic bonds with oxygenA basic oxide is an oxide that reacts with basesAcidic oxides
An acidic oxide is an oxide that reacts with acidsIn an acidic oxide, element forms covalent bonds with oxygenAt roughly what pressure, p, and temperature, t, will diamond, graphite, and liquid carbon all exist in equilibrium?.
The point where pressure, p, and temperature, t, will diamond, graphite, and liquid carbon all exist in equilibrium is at
P=1*10^5atm
T=4300k
At roughly what pressure, p, and temperature, t, will diamond, graphite, and liquid carbon all exist in equilibrium?.Generally, a situation in which opposing forces or activities are in equilibrium.
In conclusion, For a the cpd graph attached below, we consider the point where the three phases meet and hence consider equilibrum at
P=1*10^5atm
T=4300k
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why does the indicator congo red turn blue?
What is the reason behind that the melting and boiling point of iron is more than that of sodium? Write any two differences between metalloids and alloys.
Answer:
difference between metal and alloy is that the metal is a pure substance whereas the alloy is a mixture of two or more components.
Explanation:
Mostly the metalloids have the appearance just like the metallic appearance And also they are the brittle one's . Boron and silicon are the example. Note; By combining with other metals metalloid can form the alloy
In a pure sample CH₂F₂, what forces of attraction exists between molecules?
Answer: what is this give more esplanation
Explanation:
The forces of attraction that are present or exist between molecules of [tex]CH_2F_2[/tex] are as follows:
Dipole-dipole interaction.Hydrogen bonding.London Dispersion force. What is the Force of attraction?The force of attraction may be defined as a type of property that pulls the body towards its surface. It is the one through which atoms in molecules or elements are held together with different characteristics on the basis of their structure and functions.
It is known that fluorine has a higher electronegativity than carbon atoms. This difference in electronegativity is responsible for constructing a polar molecule. This significantly illustrates dipole-dipole interaction. It also demonstrates London-dispersion force which refers to the force between atoms and molecules.
It is a mechanism that overall represents the characteristics of each and every element specifically. The force of attraction governs the stability and functionality of the element and molecule as well.
Therefore, The forces of attraction that are present or exist between molecules of [tex]CH_2F_2[/tex] are Dipole-dipole interaction, Hydrogen bonding, and the London Dispersion forces.
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what is an oxidation reaction
Answer:
Oxidation: loss of electrons, gain of oxygen
Which periodic group of metals is the most reactive.
Answer:
That would be the Alkali metals, and the Alkaline earth metals.
Explanation:
I just did 3.02 periodic table guided notes. np.
Brainliest is appreciated. thx.
-Hailey
disadvantage of using a lid on a crucible
26. 8 g of ammonium chloride is dissolved in water to make a 0. 25 L solution. What is the molarity of the solution?
Answer: 0.5 M
Explanation:
Ammonium chloride has a gram formula mass of 53.49 g/mol, so 26.8 grams of ammonium chloride is 26.8/53.49 = 0.501 mol.
So since molarity = (moles of solute)/(liters of solution), the answer is 0.501 / 0.25 = 0.5 M
A 45.3 g sample of potassium nitrate is dissolved in enough water to make
225 mL of solution. Determine the molar concentration of the potassium nitrate.
Answer:
1.99 M
Explanation:
It gives the mass of a compound, KNO3. First, find the gram formula mass of KNO3. You should get 101.102 g/mol, or something very close. Next, divide given mass by g/mol mass to get number of moles. In this case, 45.3/101.102 = .44806, roughly.
Now, since it says molar concentration, it is asking for moles per liter of solution. If it only gives you 225 mL, or .225 L, you have to adjust for that value. Divide the number of moles you have by number of liters.
.44806/.225 = 1.99 M. This isn't the exact answer, but always remember to round for significant figures. Since both numbers contain 3 significant figures, your answer should have 3. Therefore 1.99 is your answer.
Consider the intermolecular forces present in a pure sample of each of the following compounds: CH3CH2CH2NH2 and CH3CH2C02H. Identify the intermolecular forces that these compounds have in common. A) Dipole-dipole forces and hydrogen bonding. B) Dipole-dipole forces only. C) Dispersion forces, dipole-dipole forces, and hydrogen bonding. D) Dispersion forces and dipole-dipole forces
The common intermolecular forces present in the compounds CH3CH2CH2NH2 and CH3CH2C02H are Dispersion forces, dipole-dipole forces, and hydrogen bonding.
What are intermolecular forces?Intermolecular forces are forces of attraction between molecules of the same compound.
Intermolecular forces are important in the physical properties of molecules.
Some intermolecular forces are:
Dipole-dipole forceshydrogen bondingDispersion forcesThe given compounds are contain hydrogen bonding and London dispersion forces as well as dipole-dipole forces.
Therefore, the common intermolecular forces present in the compounds CH3CH2CH2NH2 and CH3CH2C02H are Dispersion forces, dipole-dipole forces, and hydrogen bonding.
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What is the mass of 0.5 moles of carbon tetraflouride
Answer:
44 g
Explanation:
hope this helps
Do bases react with metals the same way that acids do?.
Answer:
Bases do not react with metals in the way that acids do
Explanation:
hope this helps
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What is the oxidation state of Hydrogen in H20
+2
+1
-2
-1
Oxygen almost always has an oxidation number of -2, except in peroxides (H 2 O 2) where it is -1 and in compounds with fluorine (OF 2) where it is +2. Hydrogen has an oxidation number of +1 when combined with non-metals, but it has an oxidation number of -1 when combined with metals.
Sure hoep this helps you :)The two highest levels of the atmosphere contain only small amounts of oxygen, nitrogen, and ozone. These layers are the
Answer:
mesosphere and thermosphere
Explanation:
1) How many Joules of energy are released when 75g of water is heated
from 25°C to 99°C? The specific heat of water is 4.18J/g°C?
I
Answer: 23,199 J
Explanation:
The combination of fossil fuel use and deforestation has emitted approximately 480 gigatons of carbon over the last century, but the amount of carbon in the atmosphere has only increased by approximately 190 gigatons. About 110 gigatons of this missing carbon went into which reservoir of the carbon cycle?.
About 110 gigatons of this missing carbon went into water reservoir of the carbon cycle.
What is carbon cycle?The biogeochemical cycle in which carbon is exchanged between the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth is known as the carbon cycle.
According to the question, emitted amount of carbon is 480 gigatons but the amount of carbon in the environment is approx 190 gigatons, so the remaining amount of the carbon was stoored by the oceans and other water reservoir, which may be get clear throug the attached diagram.
Hence remaining gigatons of carbon went into water reservoir.
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How many moles of water will be produced from the combustion of 0.25 moles of CH3 OH?
Answer: 0.5 mol
Explanation:
100 points help is appreciated
Apply: For a strong base, the concentration of hydroxide ions [OH–] is roughly estimated to be the same as the concentration of the base. The pH of a strong base is found with the equation pH = 14 + log10[OH–]. Based on their concentrations, find the pH of each of the strong bases. Check your answers with the Gizmo.
Answer
[Ca(OH)2] = ?
pH Ca(OH)2 = ?
[NaOH] = ?
pH NaOH = ?
Litmus is an example of an indicator, a substance that changes color depending on its pH (pH is a measure of the concentration of protons, or H+ ions). In the Titration Gizmo™, you will use indicators to show how acids are neutralized by bases, and vice versa.
To begin, check that 1.00 M NaOH is selected for the Burette, Mystery HBr is selected for the Flask, and Bromthymol blue is selected for the Indicator.
Calculate: Concentration is measured by molarity (M), or moles per liter. Brackets are also used to symbolize molarity. For example, if 0.6 moles of HNO3 are dissolved in a liter of water, you would say [HNO3] = 0.6 M.
Because HNO3 is a strong acid, it dissociates almost completely in water. That means the concentration of H+ is very nearly equal to that of HNO3.What is [H+] if [HNO3] is 0.01 M? 0.01 M
The pH of a solution is equal to the negative log of H+ concentration: pH = –log[H+]
Describe: The equation for the reaction of nitric acid (HNO3) and sodium hydroxide (NaOH) is shown on the bottom right of the Gizmo.
Measure: A titration can be used to determine the concentration of an acid or base by measuring the amount of a solution with a known concentration, called the titrant, which reacts completely with a solution of unknown concentration, called the analyte. The point at which this occurs is called the equivalence point.
Explain: A titration curve is a graph of pH vs. volume of titrant. The graph at right shows a typical titration curve for the titration of a strong acid by a strong base. (A strong base is one that has relatively high dissociation in water.)
According to theBrønsted-Lowry definition, an acid is a substance that is capable of donating a proton to another substance. A base is a substance that accepts protons. When an acid and a base are combined, the acid is neutralized as the base accepts the protons produced by the acid.One way to determine if a solution is acidic or basic is to use litmus paper, as shown above. There are two types of litmus papers: red and blue.How does litmus paper indicate an acid? Both strips turn red.
A particular .55 m solution contains 1.7 g of salt what mass would be present in the same volume of a 3.20 m solution
Answer: 9.9 g
Explanation:
We can set up a proportion:
1.7/.55 = x/3.20
x = 9.9 g (to 2 s.f.)
À container's filled with 28 liters of argon gas at a temperature of 353 K. If the gas is
held at 4.9 atm of pressure, how many moles of the gas are in the container?
Answer: 4.74 moles of gas are in the container.
Explanation:
1. Use the ideal gas law. PV = nRT. and re-arrange from moles by divided RT on both sides.
2.You should get the following equation: [tex]n=PV/RT[/tex]
3.Insert values: [tex]n = PV/RT = \frac{(4.9 atm)(28 L)}{(0.082 (L*atm)/(K*mol)*(353K)} = 4.74 moles.[/tex]
4.There are 4.74 moles in the container.
Good luck with chemistry!
Carbon sequestration technology, which limits the emission of the greenhouse gas carbon dioxide (CO2) into the atmosphere, is currently used by _______% of all coal-fired power plants in the USA.
25% of all coal fired power plants in the United States of America uses the Carbon Sequestration technology.
Carbon Sequestration TechnologyCarbon sequestration can be defined as the process of capturing and storing atmospheric carbon dioxide. It is one method of reducing the amount of carbon dioxide in the atmosphere with the goal of reducing global climate change.
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How to determine anode and cathode in galvanic cell.
Answer:
electrons flow from left to right
Explanation:
the electrons flow from anode to cathodeoxidation half cell reaction occurs in the anodereduction half cell reaction occurs in the cathodeA sample of oxygen was collected in a tube over water. in the tube, there is a mixture of oxygen gas and gaseous water (steam). the total pressure of the gas mixture is 760. torr. if the pressure of gaseous water is 23.8 torr, what is the pressure of the pure oxygen? 99.8 torr 736 torr 740. torr 783 torr
Answer:
736 torr.
Explanation:
What is the force that attracts one water molecule to another water molecule?.
Answer:
hydrogen bonds
Explanation: