Answer:
How many grams of H2 can be produced from the reaction of 11.5 grams of sodium with an excess of water? Hint: 2Na + 2H2O ---> 2NaOH + H2. Ans: 0.505g .
Explanation:
What type of energy transformation happens when you boil water
Answer:
thermal energy.
Explanation:
Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.
Which solution between molecular compounds denoted alkane and alkene, can be analyzed using a UV/Vis spectrophotometer? Explain.
Answer:
UV/Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of different analytes, such as transition metal ions, highly conjugated organic compounds, and certain biological macromolecules. Measurement is usually carried out in solution.
Explanation:
What would be the energy in problem 1?
[tex]\\ \rm\Rrightarrow E=h\nu[/tex]
[tex]\\ \rm\Rrightarrow E=6.626\times 10^{-34}\times 9.68\times 10^{19}[/tex]
[tex]\\ \rm\Rrightarrow E=64.1\times 10^{-15}J[/tex]
[tex]\\ \rm\Rrightarrow E=641\times 10^{-16}J[/tex]
[tex]\\ \rm\Rrightarrow E=641eV[/tex]
The movement of solid particles can be described as ________.
Answer:
liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.
Explanation:
In pea plants, the gene for the color of the seed has two alleles. In the following Punnett square shown below, the dominant allele (Y) represents yellow and the recessive allele (y) represents green.
Punnett Square showing a grid that is blank with 4 empty boxes, two columns and two rows. The female parent plant across the horizontal side, top, of the grid indicates a yellow phenotype and a genotype of Yy. The male parent plant along the vertical side of the grid indicates a yellow phenotype and a genotype of YY.
Based on the Punnett square, what percentage of offspring would be expected to have yellow seeds?
0%
25%
50%
100%
Nvm dont answer
Answer:
100%
Explanation:
since both genotypes are dominant, and one of them is YY, all of the offspring will be yellow.
Name the substances
50 pointssss! Please help me
Answer:
may I know the directions?
Explanation:
pls put a deroction
a. 2-methyl-2-propanol
b. 2-butene 1-ol
c. 3-methyl 2-butanol
d. 3-methyl 2-pentanol
The solution in a titration experiment whose concentration is
known is called the
a standard solution
b acid
c indicator
d base
Answer: It is indeed A.Standard Solution.
Hope this helps you!
PLEASE HELPPP ASAPPPPP!!!!!
What mass of nitrogen trifluoride can be produced when 32.0 G of fluorine is reaction according to the table below
N2+3F2= 2NF3
When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.
What is stoichiometry?Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change.
Let's consider the following balanced equation.
N₂ + 3 F₂ ⇒ 2 NF₃
To calculate the mass of NF₃ formed from 32.0 g of F₂, we need to consider the following relationships.
The molar mass of F₂ is 38.00 g/mol.The molar ratio of F₂ to NF₃ is 3:2.The molar mass of NF₃ is 71.00 g/mol.[tex]32.00gF_2 \frac{1molF_2}{38.00gF_2} \frac{2molNF_3}{3molF_2} \frac{71.00gNF_3}{1molNF_3} = 39.86gNF_3[/tex]
When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.
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State what could be used to keep the temperature of the conical flask and its
contents at a temperature of 45 °C throughout the reaction.
A water bath can be used to keep the temperature of the conical flask and its contents at a temperature .
What is a Water bath?This is a laboratory equipment which contains a heated source and is used to incubate samples in water at a constant temperature over a period of time.
This is why water bath will be best used to keep the temperature of the conical flask and its contents at a temperature of 45 °C throughout the reaction.
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what do scientist study to reconstruct past climate conditions?
HELP NOW!
S + O₂ → SO₃
a. What type of reaction is the above reaction? *
b. When balanced, what is the ratio of coefficients for the above reaction? *
Combination Reaction.
Explanation:
You mix a 110.0 −mL sample of a solution that is 0.0133 M in NiCl2 with a 200.0 −mL sample of a solution that is 0.250 M in NH3. After the solution reaches equilibrium, what concentration of Ni2+(aq) remains?
The value of Kf for Ni(NH3)62+ is 2.0×[tex]10^{8}[/tex] .
Based on the data provided, at equilibrium, the concentration of Ni2+ that remains is 4.268 ×10^-6 M
What is molar concentration of a solution?The molar concentration of a solution is the amount in moles of solute dissolved in a given volume of solution in litres.
Molar concentration = moles/volume in LitresTotal volume of solution after mixing = 110 + 200 = 310 mL
Concentration of Ni2+ = 0.0133M/( 310ml/110ml) = 0.00472M
Concentration of NH3 = 0.250M/(310ml/200ml) = 0.1613 M
Assuming complete formation of Ni(NH3)6, the equation of formation is given as:
Ni2+(aq) + 6NH3(aq) -------> Ni(NH3)62+ (aq)From equation of the reaction, 1 mole of Ni2+ reacts with 6 moles of NH3 to produce 1 mole of Ni[(NH3)6]2+
Then,
0.00472 M of Ni2+ react with 0.02832 M of NH3 to give 0.00472 M of Ni2+
Concentration of remaining NH3 = 0.1613 M - 0.02832M = 0.13298 M
The equation of dissociation at equilibrium of Ni(NH3)62+ is given as:
Ni[(NH3)6]2+(aq) <-------> Ni2+(aq) + 6NH3(aq)Kd = [Ni2+][NH3]6/[Ni(NH3)6]
Kd = 1/Kf = 1/ 2.0 × 10^8
Kd = 5.0 ×10^-9
Using an ICE chart;
Initial concentration:
[Ni(NH3)62+] = 0.00472
[Ni2+] = 0
[NH3] = 0.
Change in concentration:
[Ni(NH3)62+] = - x
[Ni2+] = + x
[NH3] = + 6x
Equilibrium concentration:
[ Ni(NH3)62+] = 0.00472 - x
[Ni2+] = x
[NH3] = 0.13298 + 6x
From the dissociation constant equation;
x(0.1330 + 6x)^6 / 0.00472 - x) = 5.0 ×10^-9
Assuming x is very small;
0.13298 + 6x = 0.132980.00472 - x = 0.00472x( 0.13298)^6/ 0.00472 = 5.0 ×10^-9
x × 0.00117= 5.0 ×10^-9
x = 4.268 ×10^-6 M
Therefore, at equilibrium, the concentration of Ni2+ that remains is 4.268 ×10^-6 M
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zinc sulfide + magnesium arsenate → zinc arsenate +
magnesium sulfide
Convert to formula equation
The formula equation for the reaction between zinc sulfide and magnesium arsenate is
3ZnS + Mg₃(AsO₄)₂ → Zn₃(AsO₄)₂ + 3MgS
What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to write the formula equationZinc sulfide => ZnS
Magnesium arsenate => Mg₃(AsO₄)₂
Zinc arsenate => Zn₃(AsO₄)₂
Magnesium sulfide => MgS
Zinc sulfide + Magnesium arsenate → Zinc arsenate + Magnesium sulfide
3ZnS + Mg₃(AsO₄)₂ → Zn₃(AsO₄)₂ + 3MgS
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Find the "natural" equilibrium concentration of NO in air in units of molecules/cm3 .
Answer:
6400 molecules / cm^3
Explanation:
10.6*10^-16 mol/L * 6.022*10^23 molecules/mol * 1 L / 1000 cm^3 * 1 / 100 L = 6400 molecules / cm^3
The "natural" equilibrium concentration of Nitric oxide in air in units of molecules/cm .0.062molecules/cm3
chemical equilibrium or equilibrium concentration is a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction. At the same time, there is no change in the products and reactants, and it seems that the reaction has stopped.
How do you find the equilibrium concentration?The equation for Beer's law is a straight line with the general form of y = mx +b. where the slope, m, is equal to εl. In this case, use the absorbance found for your unknown, along with the slope of your best fit line, to determine c, the concentration of the unknown solution.
Does equilibrium mean same concentration?Reversible reactions occur until equilibrium is established, meaning that they achieve a sort of balance between amounts of reactant and product. If the reactants and products are equal in energy, at equilibrium, they will have the same concentration.
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KF + 02
Balance the equation
Explanation:
this equation is balanced
if you look at it carefully
k=1
f=1
o=2
we do not have any opposing element
Answer:
this equation is balanced
if you look at it carefully
k=1
f=1
o=2
we do not have any opposing element
can guys help me to answer it
One of the following solutions turns litmus papers to red:
A)POH=3
B)[OH−] = 1×10−7 M
C)[OH-] = 1×10−5 M
D)POH=12
Answer : D. pOH = 12
solutions turns litmus papers to red : acidic (pH<7)
pH + pOH = 14
A. pOH = 3, pH = 11, alkaline
B. [OH⁻] = 1 x 10⁻⁷ ⇒ pOH = - log [OH⁻]= 7, pOH = pH = neutral
C. [OH⁻] = 1 x 10⁻⁵ ⇒ pOH = - log [OH⁻]= 5, pH = 9, alkaline
D. pOH = 12, pH = 2, acidic
Answer:
d
Explanation:
ph is acid
acid litmus paper converts to red in acidic media
What type of galaxy is the Milky Way?
O elliptical galaxy
O barred-spiral galaxy
O irregular galaxy
O large-clustered galaxy
Answer:
B is the answer
We are in a spiral galaxy but as of late scientists believe we are in a barred-spiral galaxy.
Explanation:
Hope this helped.
A brainliest is always appreciated.
Milky way is a type of barred-spiral galaxy.
What is a galaxy?
A galaxy is defined as a system of stars, stellar remainings, interstellar gas, dust, dark matter, which are bound together by means of gravity.The word is derived from the Greek word which literally means 'milky',as a reference to the Milky Way galaxy which contains the Solar System.
Most of the mass which is present in a galaxy is present in the form of dark matter, out of which only a few percent of the mass
is visible. Supermassive black holes are a common characteristic which are present at the centres of galaxies.
Galaxies are categorized as per their morphology in the shape of elliptical, spiral, or irregular. Many are believed to have supermassive black holes which are present at their centers. The Milky Way's central black hole which is present , also known as Sagittarius A*, has a mass which is four million times greater than the Sun.
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Identify this molecule:
a) alcohol
b) hydrocarbon
c) carbohydrate
d) lipid
e) amino acid
Answer:
C)
Explanation:
List the steps that occur in a generator that transform the mechanical energy of the turbine
into electricity. Be sure to include the role that magnetic and electric fields play in the process.
Electric charges flow through connection wires to constitutes electric current which supplie the generator.
What is generatorAn electric generator are used to generate electricity, they converts mechanical energy to form electricity.
Electric charges are available in the wire will winds through an external electric circuit to generate electricity.
Electric charges flow through this wires to constitutes electric current which supplies the generator.
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A sample of propane, C3H8 , contains 13.8 moles of carbon atoms. How many total moles of atoms does the sample contain
2. Give an example of a chemical or physical process that illustrates the law of
conservation of mass.
Answer:
when wood burns
(PLS MARK BRAINLIEST) (hope it helps!)
Explanation: when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant
write the molecular formula for each listed compound:
dinitrogen trioxide & nitrogen monoxide hydrochloric acid & chloric
acid sulfuric acid & sulfurous acid
Answer:
dinitrogen trioxide = N2O3
nitrogen monoxide = NO
hydrochloric acid = HCl
chloric acid = HClO3
sulfuric acid = H2SO4
sulfurous acid = H2SO3
which among the following can be attracted by a magnet, why?
an iron-
a piece of paper
9.69 × 10^7 in decimal form
How many liters of H2O gas are produced when
7.25 liters of C3H8 are
burned at STP?
C3H8 + 5O2 → 3CO2 + 4H2O
(pls show work)
What is the number of protons neutrons and electrons in a family Osito that is used in medical diagnosis atomic number 43 mass number 99 charge of 7+
Answer:
43 protons
36 electrons
56 neutron
Explanation:
neutron is mass number minus proton number.
in a non neutral atom the electron is determined after minusing the charges or electron lost.
the number of proton obviously is 43
What would be the osmotic pressure at 65 °C of an aqueous solution containing 2.50 g of sucrose (C12H22011) per 205 ml of solution?
The osmotic pressure at 65 °C of an aqueous solution containing 2.50 g of sucrose is 0.988 atm
How to determine the mole of sucrose Mass of sucrose = 2.5 gMolar mass of sucrose = 342 g/mol Mole of sucrose =?
Mole = mass /molar mass
Mole of sucrose = 2.5 / 342
Mole of sucrose = 0.0073 mole
How to determine the molarity of sucrose Mole of sucrose = 0.0073 mole Volume = 205 mL = 205 / 1000 = 0.205 L
Molarity =?
Molarity = mole / Volume
Molarity of sucrose = 0.0073 / 0.205
Molarity of sucrose = 0.0356 M
How to determine the osmotic pressure Molarity (M) = 0.0356 MTemperature (T) = 65 °C = 65 + 273 = 338 KGas constant (R) = 0.0821 atm.L/Kmol Van't Hoff factor (i) = 1 (sucrose is non-electrolyte) Osmotic pressure (π) =?
π = iMRT
π = 1 × 0.0356 × 0.0821 × 338
π = 0.988 atm
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FeCl3 + NaOH → Fe(OH)3 + NaCl
[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]
Here's the solution ~
The required balanced equation is :[tex]\qquad \sf FeCl_3 + 3 \: NaOH \dashrightarrow Fe(OH)_3 + 3 \: NaCl[/tex]
Reactant Side : Iron (Fe) = 1Sodium (Na) = 3Oxygen (O) = 3 Hydrogen (H) = 3Chlorine (Cl) = 3Product side : Iron (Fe) = 1Sodium (Na) = 3Oxygen (O) = 3 Hydrogen (H) = 3Chlorine (Cl) = 3