Answer:
But-1-ene is another unsymmetrical alkene. As with all alkenes, unsymmetrical alkenes like propene react with hydrogen bromide in the cold. The double bond breaks and a hydrogen atom ends up attached to one of the carbons and a bromine atom to the other. In the case of propene, 2-bromopropane is formed.
Explanation:
What is a potential benefit of fuel cell cars?
O increased efficiency converting gasoline to energy
O no recharging necessary
O decreased automobile cost
O larger engines
Answer:
no recharging necessary
Answer:
What is a potential benefit of fuel cell cars?
increased efficiency converting gasoline to energy
✔ no recharging necessary or B.)
decreased automobile cost
larger engines
When initially set up, in which direction does the thermal energy between the flasks flow?
A
Thermal energy flows from the flask on the left to the flask on the right.
B
Thermal energy flows from the flask on the right to the flask on the left.
C
Thermal energy does not flow between the two flasks.
D
Thermal energy flows equally between the two flasks.
Answer:
How you going to delete my answer even though it was right but dont delete his answer bro didnt even say nun
Explanation:
Answer D
Thermal energy flows from the flask on the left to the flask on the right as energy is transferred from higher to lower temperature.
What is thermal energy?
Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.
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The nucleoside adenosine exists in a protonated form with a pKa of 3.8. The percentage of the protonated form at pH 4.8 is closest to:
Answer:
Ok:
Explanation:
So, you can use the Henderson-Hasselbalch equation for this:
pH = pKa + log([tex]A^-/HA[/tex]) where A- is the conjugate base of the acid. In other words, A- is the deprotonated form and HA is the protonated.
We can solve that
1 = log([tex]A^-/HA\\[/tex]) and so 10 = [tex]A^-/HA[/tex] or 10HA = A-. For every 1 protonated form of adenosine (HA), there are 10 A-. So, the percent in the protonated form will be 1(1+10) or 1/11 which is close to 9 percent.
Nucleoside is "a structural subunit of nucleic acids, the heredity-controlling components of all living cells, consisting of a molecule of sugar linked to a nitrogen-containing organic compound".
What are nucleic acids?Nucleic acids are "naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells".
What is nitrogen?Nitrogen is "an essential element for all forms of life and is the structural component of amino acids from which animal and human tissues, enzymes, and many hormones are made".
What is organic compound?Organic compound is "any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen".
Using Henderson-Hasselbalch equation
pH = pKa + log(A⁻/HA)
where pH is the concentration of [H⁺]
pKa is the acid dissociation constant and [A⁻] and [HA] are the concentrations of conjugate base and an acid.
1 = log (A⁻/HA)
Thus, 10 = A⁻/HA
10HA = A⁻ Each protonated form of adenosine (HA) contains 10 A⁻
Hence, the percentage of the protonated form at pH 4.8 will be 1(1+10) or 1/11 which is closer to 9 percent.
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if 2.0 mol of Zn is mixed with 3.0 mol
of HCl, which reactant will be limiting?
The following Balanced Reaction will take place:
Zn + 2HCl → ZnCl₂ + H₂
In the question, we have 2 moles of Zinc and 3 moles of HCl for this reaction
Amount of HCl required to completely react with 2 moles of Zn:
Since we need 2 moles of HCl for every mole of Zn, we will need 2(2) = 4 moles of HCl for every 2 moles of Zn
Identifying the Limiting Reagent:
But we are only given 3 moles of HCl where we need 4 moles to completely react.
So, since HCl is in less amount, it is the Limiting Reagent
I need help with this pls
Answer:
[tex]1)20 \\ 2)13 \\ 3)82 \\ 4)56 \\ 5)26 \\ 6)1 \\ hope \: it \: helps \\ plzzz \: mark \: it \: as \: brainliest...[/tex]
If volatiles such as water vapor and carbon dioxide are added to a rock, what will happen to the melting temperature
Answer:
The melting temperature of a rock will decrease
Explanation:
In the case when the water vapour and the carbon dioxide is added to the rock so the rock melting temperature would be reduced as if we added the salt to an ice on a road so it reduced the temperature
Therefore according to the given situation, the last option is correct
And, the rest of the options are wrong
A compound is 26.06 % N and73.94 % O. If the compound's molar mass is 108.0 g/mol, what is its molecular formula.
Answer:
yes
Explanation:
no jk, whats the mass?
Arrange the following elements in order of decreasing ionization energy: Cl, Si, P, Ar *
Answer:
Ar > Cl > P > Si.
whoever answers my question correctly I'll give 50 points
Answer:
okii is it on your page
Explanation:
Answer:
hello
Explanation:
NEED HELP!! WILL NAME THE BRAINIEST!!!
are the counterfeit coins examples of mixtures, compounds, or elements?
Answer:
elementas
Explanation:
question: Looking at the above visual of "Atmospheres of the Solar System" What are two patterns
you can find? PLEASE HELP DUE TONIGHT!
Answer:
The first and most obvious pattern I see is that all gas giants have an atmosphere mainly made up of hydrogen
The second thing I notice is that all the rocky planets have a significant amount of Nitrogen in their atmospheres except Mercury.
The third thing I notice is that all planets have one element that makes up 75% or more of its atmosphere except Mercury.
(If this is good, may I have brainliest, please? I'm kinda poor..)
Answer:
It's hard to find patterns in the solar system's atmosphere but I think above found a lot of them.
which climate is most likely found in a high pressure belt giving brainliest ty
Answer:
Rain forest.
Explanation: Because of how humid it is in a rain forest that humidity will bring a lot of pressure from above.
Answer:
A is the answer. Here is proof. Plz mark brainliest.
Explanation:
An aqueous solution contains
32.7% KCI (weight/weight %).
What is the mole fraction of KCI in
this aqueous solution?
Molar Mass
KCI: 74.55 g/mol
H2O: 18.016 g/mol
The mole fraction of KCl = 0.105
Further explanationGiven
%w/w KCl = 32.7
Required
the mole fraction of KCI
Solution
For 100 g solution : KCl = 32.7 g, H₂O = 67.3 g
mol KCl :
[tex]\tt \dfrac{32.7}{74.55~g/mol}=0.439[/tex]
mol H₂O :
[tex]\tt \dfrac{67.3}{18.016}=3.74[/tex]
total mol of solution = 0.439+3.74=4.179
mol fraction of KCl :
[tex]\tt \dfrac{0.439}{4.179}=0.105[/tex]
Answer:
32.7
Explanation:
2 Draw circles around the examples below that are non-metals.
chlorine
silver
helium
carbon
iron
mercury
calcium
neon
sodium
sulfur
gold
zinc
Answer:
Chlorine
Carbon
Sulphur
Rest all are metals.
More to know -
Silver metal is use in jewellery
helium is present is atmosphere ( it is harmful for living being )
Carbon is use in wires
Iron is uses in many articles like ships , Iron nail
Calcium is use to purify water
How many atoms are in 2.0 moles of C2H6
Answer:
2 atoms of carbon combine with 6 atoms of hydrogen to from ethane.
The end point in a titration of a 43ml sample of aqueous lactic acid was reached by addition of 16mlof0.22MKOH titrant. One mole of acid was titrated by one mole of base. What is the molar concentration of lactic acid
Answer:
0.082 M
Explanation:
First we calculate the moles of KOH added, by multiplying its volume and concentration:
0.22 M * 16 mL = 3.52 mmol KOHGiven that one mole of acid reacts with one mole of base, in the lactic acid sample there were 3.52 acid moles as well.
Finally we divide the acid moles by the volume, to calculate the concentration:
3.52 acid moles / 43 mL = 0.082 MExplain how the carbon cycle affects climate change(in your own words as detailed as possible)
Answer:
Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth’s temperature, make up the food that sustains us, and provide energy that fuels our global economy. Most of Earth’s carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs through which carbon cycles.The ocean plays a critical role in carbon storage, as it holds about 50 times more carbon than the atmosphere. Two-way carbon exchange can occur quickly between the ocean’s surface waters and the atmosphere, but carbon may be stored for centuries at the deepest ocean depths.
Explanation:
Tom looks very different from his parents he has brown eyes and his parents have blue eyes is he adopted??
Answer:
no he don't have to be adopted he just different from his parents
. An excited hydrogen atom with an electron in the n 5 5 state emits light having a frequency of 6.90 3 1014 s21. Determine the principal quantum level for the final state in this electronic transition.
Answer:
2
Explanation:
Given that the energy of a photon of light is obtained from;
ΔE = hf = 6.6 * 10^-34 Js * 6.903 * 10^14 = 45.6 * 10^-20 J
For moving from n=2 -n-=5 the electron absorbed energy hence the energy is positive.
but;
ΔE = -2.18 * 10^-18 (1/n^2final - 1/n^2initial)
45.6 * 10^-20 J= 2.18 * 10^-18 J (1/n^2final - 1/5^2)
0.21 = (1/n^2final - 1/5^2)
1/n^2final = 0.21 + 1/5^2
n^2final = 4
nfinal = 2
The principal quantum level for the final state in this electronic transition is 2.
We first find the wavelength of the hydrogen atom Using the formula;
λ = c/f
λ= wavelength of the photon
h = Plank's constant
f = frequency
λ =3 × 10^8 m/s / 6.903 x 10^14 s-1
λ = 4.3459 × 10^-7 m
Now that we know that
Initial transition = 2Wavelength =4.3459 × 10^-7 mWe can now use the Rydberg equation 1/λ =R(1/n²f -1/n²i)to determine the principal quantum level in which the electron stopped.
Remember that Rydberg constant = 1.09 x 10^7 m⁻1
1/λ =R(1/n²f -1/n²i)
1/4.3459 × 10^-7 m = 1.09 x 10^7 m⁻1(1/n²f -1/5²)
1/(4.3459 × 10^-7 m x1.09 x 10^7) = (1/n²f -1/5²)
1/4.7370= (1/n²f -1/5²)
0.211= (1/n²f -1/5²)
1/n²f= 0.211+ (1/5²)
1/n²f= 0.211+0.04
1/n²f=0.25
n²f=1/0.25
nf = √4
nf = 2
Therefore final transistion is 2.0
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What is the total number of atoms of oxygen in the formula Al(CIO3)3 + 6H20?
1. 6
2. 9
3. 10
4. 15
P4+ __02_ P4010
I need help ASAP
Answer:
[tex]P_4+5O_2\rightarrow P_4O_{10}[/tex]
Explanation:
Hello!
In this case, when we want to balance chemical reactions such as in this case, the idea is to equal to number of atoms of each element at each side of the equation according to the lay of conservation of mass, just as shown below:
[tex]P_4+5O_2\rightarrow P_4O_{10}[/tex]
Because we have four phosphorous and ten oxygen atoms at each side.
Best regards!
When formic acid is treated with potassium hydroxide (KOH), an acid-base reaction occurs, forming a carboxylate ion. For the mechanism, draw the curved arrows as needed. Include lone pairs and charges in your answer. Do not draw out any hydrogen explicitly in your products.
Answer:
See explanation
Explanation:
The reaction between formic acid and potassium hydroxide is an acid base reaction.
Remember that an acid base reaction yields salt and water only.
If you look at the curved arrow mechanism shown, you will discover that the hydroxide ion from KOH abstracts a proton from the acid to yield potassium formate and water
A mixture of helium, nitrogen, and oxygen has a total pressure of 756 mmHg. The partial pressures of helium and nitrogen are 229 mmHg and 205 mmHg, respectively. What is the partial pressure of oxygen in the mixture?
Answer:
322 mmHg
Explanation:
Step 1: Given data
Total pressure of the gaseous mixture (P): 756 mmHgPartial pressure of helium (pHe): 229 mmHgPartial pressure of nitrogen (pN₂): 205 mmHgStep 2: Calculate the partial pressure of oxygen (pO₂)
The total pressure of the gaseous mixture is equal to the sum of the partial pressures of the individual gases.
P = pHe + pN₂ + pO₂
pO₂ = P - pHe - pN₂
pO₂ = 756 mmHg - 229 mmHg - 205 mmHg
pO₂ = 322 mmHg
What is the complete balanced equation for the reaction
between magnesium hydroxide and hydrogen chloride to
produce magnesium chloride and water is
O MgOH + HCI → MgCl + H2O.
O Mg(OH)2 + 2HCl → MgCl2 + 2H20.
O Mg(OH)2 + HCl → Mg + 2CO2 +3H20.
O Mg(OH)2 + 2HCl → MgCl2 + H2 + O2.
Answer:
[tex]mg(oh) {}^{2} + 2hcl) \\ gives \\ \: mgcl2 + 2h {}^{2}o[/tex]
[tex]option. b \: is \: the \: correct \\ \: balanced \: equation[/tex]
name and describe three measures of central tendency used to summarize data
Answer: Mean, main, and mode
How does shielding impact the strength of attraction between the nucleus and the valence electrons?
Answer:
The shielding effect explains why valence shell electrons are more easily removed from the atom. The nucleus can pull the valence shell in tighter when the attraction is strong and less tight when the attraction is weakened. The more shielding that occurs, the further the valence shell can spread out.
Explanation:
The partial pressure of carbon dioxide in the atmosphere is 0.0318 kpa . Calculate the partial pressure in .Round answer to significant digits
Answer:
Partial pressure of carbon dioxide in the atmosphere = 0.0003184 atm (Approx)
Explanation:
Given:
Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa
Computation:
1 Kilo-pascal (kPa) = 0.00986923 atm
Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa
Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa x 0.00986923 atm
Partial pressure of carbon dioxide in the atmosphere = 0.0003184 atm (Approx)
Calculate the density of a material that has a mass of 60g and a volume of 15 ml.
Need help ASAP
Answer:
4 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{60}{15} \\ [/tex]
We have the final answer as
4 g/mLHope this helps you
NH3(aq) + HNO3(aq) → NH4NO3(aq) Calculate the volume of an acid (1.5 M HNO3) needed to neutralize the 1.5 M HNO3.
Answer:
NH3(aq) + HNO3(aq) → NH4NO3(aq) Calculate the volume of an acid (1.5 M HNO3) needed to neutralize the 1.5 M HNO3.
Explanation:
A 1.0 x 102- gram sample is found to be pure alanine, an amino acid found in proteins. How many moles of alanine are in the sample
Answer:
1.123x10⁻⁴ moles of alanine
Explanation:
In order to convert grams of alanine into moles, we need to know its molecular weight:
The formula for alanine is C₃H₇NO₂, meaning its molecular weight would be:
12*3 + 7*1 + 14 + 16*2 = 89 g/molThen we divide the sample mass by the molecular weight, to do the conversion:
1.0x10⁻² g ÷ 89 g/mol = 1.123x10⁻⁴ moles