Answer:
How can we make use of acids or bases to remove heavy metals from soils? We can remove heavy metals from soil by adding acid and catching the solution that drains through. Acids can react with metals turning metalic compounds which can be dissolved by water and washed away. Improve crop yields?
Explanation:
Red blood cells are constantly being produced in your body. Another body system cooperates with the cardiovascular system in the production of these cells. What is this system and how does it cooperate?
How many grams of Fe3+ are present in 2.56 grams of iron(III) iodide?
Answer:
436.55841 grams.
Explanation:
The molecular formula for Iron(III) Iodide is FeI3. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iron(III) Iodide, or 436.55841 grams.
You use the 1 / 436.55841 conversion rate. This is different for each element, according to the stoichiometry tables. Iron(II) oxide would be 2/3 of the 1/436.55841 conversion rate, that is, multiplying the fraction to denominator.
How many molecules are equal to 89.23g of calcium oxide
Answer:
1.593 moles
Explanation:
Therefore, 1.593 moles are equal to 89.23 g of calcium oxide.
Answer:
9.64 × 10²³ molecules
Explanation:
Given data:
Mass of calcium oxide = 89.23 g
Number of molecules = ?
Solution:
First of all we will calculate the number of moles of calcium oxide.
Number of moles = mass/molar mass
Number of moles = 89.23 g/ 56.1 g/mol
Number of moles = 1.6 mol
Number of molecules;
1 mole contain 6.022 × 10²³ molecules
1.6 mol × 6.022 × 10²³ molecules / 1mol
9.64 × 10²³ molecules
The number 6.022 × 10²³ is called Avogadro number.
PLZ HELP IT BEING TIMED!!!!!! PLZ ANSWER!!!!!
Answer:
YIKES. a bit late. Answers include 1, 2, 3
Explanation:
7.
Use the reaction below for the reaction of dicyanoacetylene with
ozone to produce carbon monoxide and nitrogen.
3C4N2(8) + 403(g) → 1200(8) + 3N2(g).
What volume of CO is produced when 1.20 L of C4N2 reacts?
a 0.300 L CO
b 3.60 L CO
C 14.4 L CO
d 4.80 L CO
Answer:
D
Explanation:
The volume of carbon monoxide is produced when 1.20 L of dicyanoacetylene reacts is
What is stoichiometry?Stoichiometry of any reaction tells about rhe relative amount of substance present before and after the completion of any chemical reaction.
Given balanced chemical reaction between dicyanoacetylene and ozone to produce carbon monoxide and nitrogen is:
3C₄N₂ + 4O₃ → 12CO + 3N₂
From the stoichiometry of the reaction it is clear that:
3 liters of C₄N₂ = produces 12 liters of CO
1.20 liters of C₄N₂ = produces 12/3×1.20=4.8 liters of CO
Hence option (d) is correct i.e. 4.8 liters.
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Sns
Station 5
Find the formula for the following
compounds:
Chromium (II) Oxide
Chromium (III) Oxide
Lead (II) Phosphide
Mercury (0) Sulfide
Manganese (11) Nitride
Sulfur dioxide, SO2, is used in wine as an antioxidant, slowing the oxidation of ethanol
to ethanoic acid. To determine the SO2 content of a wine sample, sodium hydroxide
and sulfuric acid were added to ensure that all sulfur was present as SO2. A 20.00 mL
aliquot was then titrated against standardised iodine solution, using starch indicator.
Reaction occurred according to the equation:
SO2(aq) + 2H2O(l) + 12(aq) → 4H+ (aq) + 21- (aq) + SO42- (aq)
The end point was reached with 15.62 mL of 0.00501 M iodine solution. The
concentration (in M) of SO2 in the wine was ...
A)6.2 x 10-3
B)7.8 x 10-3
C)3.9 x 10-3
D)5.0 x 10-3
The concentration (in M) of SO₂ in the wine : c. 3.9 x 10⁻³
Further explanationGiven
Reaction
SO2(aq) + 2H2O(l) + I2(aq) → 4H+ (aq) + 21- (aq) + SO42- (aq)
Required
The concentration (in M) of SO2
Solution
Titration ⇒ mol SO₂ = mol iodine(I)
mol iodine :
=15.62 ml x 0.00501 M
=0.078256 mlmol
From equation, mol ratio of of SO₂ : I₂ = 1 : 1, so mol SO₂=0.078256
The concentration of SO₂(in 20 ml sample) :
M = n/V
M = 0.078256 mlmol/20 ml
M = 0.0039128
M = 3.9 x 10⁻³
Copper metal reacts with silver nitrate to produce silver metal and copper (II) nitrate.
the correct equation for this reaction is:
A: Cu + SiN—> Si + Cu2N
B: 2Cu + AgNO3–> Ag +
Cu(NO3)2
C: Cu + 2 AgNO3–> Ag + Cu(NO3)2
D:Cu + AgNO3–> Ag + CuNO3
Answer:
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
Explanation:
The reactants are:
Copper metal = Cu
Silver nitrate = AgNO₃
The products are:
Silver metal = Ag
Copper (II) nitrate = Cu(NO₃)₂
So, the reaction equation is given as;
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
This is a single displacement reaction
what type of reaction is AsCl+H2S --> As2S3+HCl
Answer:
Double replacement:
Explanation:
Chemical equation:
2AsCl + 3H₂S → As₂S₃ + 6HCl
The given reaction is double displacement reaction. In this reaction arsenic trichloride and hydrogen sulfide react and produced arsenic sulfide and hydrogen chloride. In double displacement reaction both anion an cation of reactants are exchanged with each other.
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
General equation:
AB + CD → AD +CB
An increase in aurora activity on Earth could be related to what activity on the Sun?
O A decrease in prominence
B decrease in solar Fares
Oc decrease in speed of solar wind
D increase in speed of solar wind
E increase in sun spots
Answer:
D.
Explanation:
INCREASE OF SOLAR WINDS When the sun is more active
6. What is the equilibrium constant for the following reaction?
C+02 = CO2
Given
Reaction
C+02 = CO2
Required
The equilibrium constant
Solution
The equilibrium constant is the ratio of concentration or pressure between the product and the reactant with each reaction coefficient raised
The equilibrium constant is based on the concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]
So for the reaction :
C+O₂ ⇔ CO₂
[tex]\tt Kc=\dfrac{[CO_2]}{[C][O_2]}[/tex]
HELPP! What is ammonium nitrates freezing point ?
Answer:
Freezing points for water with freezing mixtures based on salt and ice: Ammonium Nitrate - Chrushed Ice or Snow in Water 1 part Ammonium Nitrate - 0.94 parts Ice/water : temperature -4 o C 1 part Ammonium Nitrate - 1.20 parts Ice/water : temperature -14 o C
Explanation:
the gravitational force between two objects depends on the distance between the objects and each object?
Answer:
Gravitational force between two objects depends on: a. The weight of the objects c. The mass of each object b. The distance between the objects d. Both b and c Please select the best answer from the choices provided A B C D
✓d
How is thermal energy transferred during conduction? Check all that apply.
Thermal energy is transferred between particles that are not touching each other.
Thermal energy is transferred between particles that are in direct contact with each other.
Thermal energy is transferred between objects of different temperatures.
Themal energy is transferred between objects of the same temperature.
Themel energy is transferred from slow-moving particles to fast-moving particles.
Themal energy is transferred from fast-moving particles to slow-moving particles, .
Answer:
Option 2, 3, and also 6 btw
Explanation:
The other guy was wrong
What is the measure of the amount of dissolved salts in ocean water?
Answer:
Salinity
HOPE THIS HELPS! :)
Explanation:
100POINTS! ANSWER ALL 3 PARTS (look at the picture)
Answer:
Part 1-B
Part 2-D
Part 3-A
Answer:
1.B
2.D
3.A
Explanation:
.......................
Measure that affects the thermal energy of matter but not it's temperature.
Answer: mass
Explanation:
A certain solid element is better electrical conductor than sulfur, but a poorer electrical conductor than copper. Which of the following elements is most consistent with this information.
a) germanium b) oxygen c) potassium d) mercury e) neon
Kp/Kc for reaction for the equilibrium, A(g) ⇌ C(g)+B(g), is _______.
(Kc is the equilibrium constant in terms of concentrations, Kp is the equilibrium constant in terms of pressures, R is the gas constant, T is the temperature)
Select one:
(RT)2
(RT)-1
(RT)-2
(RT)-1.5
RT
Kp/Kc = RT
Further explanationGiven
Reaction
A(g) ⇌ C(g)+B(g)
Required
Kp/Kc
Solution
For reaction :
pA + qB ⇒ mC + nD
[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]
While the equilibrium constant Kp is based on the partial pressure
[tex]\large {\boxed {\bold {Kp ~ = ~ \frac {[pC] ^ m [pD] ^ n} {[pA] ^ p [pB] ^ q}}}}[/tex]
The value of Kp and Kc can be linked to the formula '
[tex]\large {\boxed {\bold {Kp ~ = ~ Kc. (R.T) ^ {\Delta n}}}}[/tex]
R = gas constant = 0.0821 L.atm / mol.K
Δn=moles products - moles reactants or
number of product coefficients-number of reactant coefficients
For reaction :
A(g) ⇌ C(g)+B(g)
number of product coefficients = 1+1=2
number of reactant coefficients = 1
Δn= 2 - 1 =1
So Kp/Kc = RT
Need help asap
1. All nonmetals (except hydrogen) have 8 valence electrons?
True or False
2. The N^-3 ion is classified as a(n) ____ and has ____.
A. anion, 8 valence electrons
B. cation, 8 valence electrons
C. anion, 15 valence electrons
D. anion, 3 valence electrons
3. If two nonmetals react to form a compound and have very different _____ they form ____ bonds. If there is a small difference, then they form ____ bonds.
A. ionization energy; covalent; nonpolar ionic
B. electronegativity; nonpolar covalent; polar covalent.
C. ionization energy, ionic, nonpolar covalent
D. electronegativity, polar covalent, nonpolar covalent.
Answer:
1: false
2: B
Explanation:
I do not know the 3rd one
A gas has a boiling point of 175 celsius. At what kelvin temperature would this gas boil
Answer:
448
Explanation:
K =273+°c
K=273+175
K=448
Mr. Smith wanted to see if the color of light shined on a plant had an effect on the number of leaves it had. He gathered a 2
groups of the same species of plants, gave them the same amount of water, and did the test for the same amount of time.
On one group of plants he used white light. On the second group he changed the light color to red. Identify:
Independent variable:
Dependent variable:
Constants:
Control group (What would Mr. Smith use as a control group?):
Experimental group (what would Mr. Smith use as a experimental group?)
If phosphofructokinase experienced a mutation that interfered with substrate binding, then what other enzyme is going to be most immediately impacted in terms of accessing substrate?
A. aldolase
B. fumarase
C. glucolactonase
D. hexokinase
Answer: A. aldolase
Explanation:
Phosphofructokinase, is an enzyme which is vital in the regulation of fermentation. It is involved in the glycolysis process.
When it experiences a mutation that was being interfered with the substrate binding, we should note that the enzyme that is going to be most immediately impacted in terms of accessing substrate is aldolase.
Diana has just completed a reaction that had a chemical change. Which two changes could be evidence of this change?
color and odor
color and shape
odor and density
shape and density
Answer:
I think its A im sorry if im wrong
Explanation:
Answer:
color and odor
Explanation:
If you have moles and want to convert to liters, which conversion factor would you use
Answer:
When converting from liters to moles or moles to liters, you will use the equality 1 mole=22.4 L for a gas at STP.
If you have moles and want to convert to (Volume) liters, 1 mole = 22.4 L is the conversion factor that can be used.
The area that any three-dimensional solid occupies is known as its volume. These solids can take the form of a cube, cuboid, cone, cylinder, or sphere. Various forms have various volumes. We have studied the several solids and forms that are specified in three dimensions, such as cubes, cuboids, cylinders, cones, etc., in 3D geometry. We will discover how we can determine the volume for each of these shapes. One mole of any gas have 22.4 L at STP.
1 mole = 22.4 L
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what is the mole fraction of cation in 1M of aluminium sulphate
The mole fraction of cation (Al)=0.4
Further explanationGiven
1 M of Aluminium sulphate
Required
The mole fraction of cation
Solution
Ionization of the Aluminum sulfate solution( assume 1 L solution ) :
mol Al₂(SO₄)₃ = M x V = 1 M x 1 L = 1 mol
Al₂(SO₄)₃⇒2Al³⁺ + 3SO₄²⁻
1 mol 2 mol 3 mol
From this equation, total mol in solution = 2+3 = 5 moles
Mol fraction Al(as a cation) :
= 2/5=0.4
in a double replacement reaction cesium chloride reacts with silver nitrate to produce silver chloride and
a cacl
b cs(no3)2
c agcs
d csno3
Answer:
CsNO₃
Explanation:
The reactants are:
Cesium chloride = CsCl
Silver nitrate = AgNO₃
Products:
Silver chloride = AgCl
The other product:
Now;
CsCl + AgNO₃ → AgCl + ?
The other product is CsNO₃
So;
CsCl + AgNO₃ → AgCl + CsNO₃
The metal rhenium becomes superconducting at temperatures below 1.4 K. Calculate the temperature at which rhenium becomes superconducting in degrees Celsius.
Answer:
The temperature at which rhenium becomes superconducting is -271.6 ºC.
Explanation:
We can convert the temperature given in Kelvin, which is an absolute scale, into degrees Celsius. which is a relative scale, by a simple algebraic translation, that is:
[tex]T_{C} = T_{K} - 273[/tex] (1)
Where:
[tex]T_{C}[/tex] - Temperature, measured in degrees Celsius.
[tex]T_{K}[/tex] - Temperature, measured in Kelvins.
If we know that [tex]T_{K} = 1.4\,K[/tex], then the temperature given in degrees Celsius is:
[tex]T_{C} = 1.4\,K-273[/tex]
[tex]T_{C} = -271.6\,^{\circ}C[/tex]
The temperature at which rhenium becomes superconducting is -271.6 ºC.
How often does the tip of and hour hand on a clock have the same velocity?
Answer:
Estoy triste, tuve que regalar a mi perro
How much drug should be used in preparing 50mL of solution such that 5 mL diluted 500mL will yield 1:1000 solution?
Stock solutions contain a standardized concentration of the solute in a solution. To prepare 50 mL of solution with a ratio of 1:1000 solution, 5 gms of the drug will be required.
What is dilution?Dilution is the property of the solution with a less amount of solute concentration than the stock solution. A dilute solution is prepared by the addition of more solvent.
The addition of the solvent in a solution decreases the molar concentration which leads to dilution.
The ratio of 1:1000 means that 1 gm of the drug is present in 1000 mL (1L) of solution.
1000 mL = 1 gm × 500 mL × X gm
Here, the X represents the 0.5 gm of drug dissolved in 500 mL.
The amount of drug used is calculated as,
5 mL ÷ 50 ml = 0.5 g ÷ X g
X = 0.5 × 50 ÷ 5
= 5 gm
Therefore, 5 gm of the drug is required to prepare 50 mL of solution.
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