A 15.00 L sample of Helium gas has a mass of .002 kg. What is the
density of this sample? Your answer should be expressed in proper
scientific notation. Please show your work to receive credit.
Answer:
[tex]d=1.33x10^{-4}kg/L[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the required density by knowing it is calculated by dividing mass over volume:
[tex]d=m/V[/tex]
Therefore, we plug in the given kilograms and liters to obtain:
[tex]d=\frac{0.002kg}{15.00L}\\\\d=1.33x10^{-4}kg/L[/tex]
Which shows the proper scientific notation.
Regards!
Some glucose produced by gluconeogenesis is stored in the body as glycogen. Order the steps of glycogen synthesis.
a. Pyrophosphatase converts PPi and water into two Pi
b. Glycogen synthase adds a glucose unit from UDP-glucose to glycogen, producing a larger glycogen molecule and UDP
c. Glvcogen synthase removes a glucose unit from a glycogen molecule producing a smaller glycogen molecule and IJDP
d. ADP-glucose pyrophosphorylase catalyzes the reaction of glucose-I -phosphate and ATP to ADP-glucose and PPi
e. UDP-glucose pyrophosphorylase catalyzes the reaction of glucose-I-phosphate and UTP to UDP-glucose and PPi
Answer:
e. UDP-glucose pyrophosphorylase catalyzes the reaction of glucose-I-phosphate and UTP to UDP-glucose and PPi
a. Pyrophosphatase converts PPi and water into two Pi
b. Glycogen synthase adds a glucose unit from UDP-glucose to glycogen, producing a larger glycogen molecule and UDP
Explanation:
Glycogen synthesis or glycogenesis is the process of synthesis of glycogen molecules from glucose molecules in living organisms. Glycogen is a polysaccharide storage form of glucose and helps to store excess glucose in the body form use when required by the body.
The synthesis of glycogen involves sugar nucleotides. Sugar nucleotides are compounds in which a sugar molecule is attached to a nucleotide through phosphate ester bond, resulting in the activation of the sugar molecule. The sugar nucleotides then are used as substrates for the polymerization of the monosaccharide sugars into disaccharides, oligosaccharides and polysaccharides.
In the synthesis of glycogen, glucose-6-phosphate from phosphorylation of free glucose by hexokinase is first isomerized to glucose-1-phosphate by phosphoglucomutase.
Glucose-1-phosphate is then converted to UDP-glucose by its reaction with UTP catalyse by UDP-glucose pyrophosphorylase. The reaction is favoured by the rapid hydrolysis of PPi produced to two molecules of inorganic phosphate by the enzyme pyrophosphatase.
Glycogen synthase then adds a glucose unit from UDP-glucose to a growing chain of glycogen, producing a larger glycogen molecule and free UDP.
What characteristic of a light wave in a medium determines the index of refraction of that
medium?
Answer:
The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.
Explanation:
A student in CEM143 was doing a fractional distillation when she noticed that the temperature suddenly started to drop. What could have caused the decrease in the temperature
Explanation:
A process where two or more number of miscible liquids present in different fractions are separated by boiling at different temperatures is called fractional distillation.
The sudden decrease in temperature is because the compounds having lower boiling point have completed the distillation before vapor of the higher boiling point can actually fill the distillation head.
How many milliliters of 0.350 M H2SO4 are required to neutralize 60.0 mL of 0.300 M NaOH?
Answer:
25.7 mL of H₂SO₄
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O
From the balanced equation above,
The mole ratio of acid, H₂SO₄ (nₐ) = 1
The mole ratio of base, NaOH (n₆) = 2
Finally, we shall determine the volume of H₂SO₄ needed for the reaction. This can be obtained as shown below:
Molarity of acid, H₂SO₄ (Mₐ) = 0.350 M
Volume of base, NaOH (V₆) = 60 mL
Molarity of base, NaOH (M₆) = 0.300 M
Volume of acid, H₂SO₄ (Vₐ) = ?
MₐVₐ / M₆V₆ = nₐ/n₆
0.350 × Vₐ / 0.3 × 60 = 1/2
0.350 × Vₐ / 18 = 1/2
Cross multiply
0.350 × 2 × Vₐ = 18
0.7 × Vₐ = 18
Divide both side by 0.7
Vₐ = 18 / 0.7
Vₐ = 25.7 mL
Thus, 25.7 mL of H₂SO₄ is needed for the reaction.
Which of the following combination of elements would result in covalent compound? * W X Y Z Vand X Wand Z Y and Z Wand y
Answer:
C. Y & Z
Explanation:
V, W are imaginary metals here because their valence electrons are typically less than 4. X, Y, Z are non-metals and have higher valence electrons. Here, if V or W bind with X, Y, or Z we make ionic bond (because metal + non metal = ionic). But, if X binds with Y or Z or any combinations of any two of the three non-metals results in covalent bond (non metal + non metal = covalent).
Thus, Y and Z make covalent.
What is the concentration of a solution with a volume of 3.3 mL that contains 12 g of ammonium sulfite? (molar mass = 100.154 g/mol)
Answer:
36.30 M
Explanation:
Given that:
Molar mass of ammonium sulfite (NH₄)₂ SO₃ = 100.154 g/mol
Volume = 3.3 mL
to liters, we have: (3.3/1000)L
= 0.0033 L
mass = 12 grams
The concentration of the solution = [tex]\dfrac{12 \ g}{ 100 .154 \ g/mol}\times \dfrac{1}{0.0033 \ L}[/tex]
= 36.30 M
Which statements correctly describe the relationship between the event and its effect on energy inputs and outputs?
A. The eruption of a volcano increases the concentration of particles in the atmosphere, which decreases the amount of energy that can reach Earth from the Sun in the short term.
B. Burning fossil fuels decreases the concentration of greenhouse gases in the atmosphere, which decreases the amount of heat that reflects back to Earth's surface.
C. Changes in Earth's orbit periodically increase the amount of solar energy reaching Earth from the Sun, which raises temperatures.
Answer:
They Are All Very Good Statements But I Will Go With "A"
Explanation:
I go with "A" Because In The statement it has a cause an effect, it has a positive term and a negative term, in other uses it is "A" between energy inputs and outputs, and events.
The statement that correctly describes the relationship between the event and its effect on energy inputs and outputs is Option A .
What is Energy ?Energy is defined as the capacity to do work .
There are various types of Energy , Light Energy , Sound Energy , Solar Energy , Wind Energy etc .
Volcanic eruptions emit huge amounts of volcanic dust, sulfur compounds and water vapor into the atmosphere .
This reduces the atmospheric transparency and that results into causing hindrance to the solar radiation penetration in the earth's surface ,
This results in short term cooling effect over large areas of earth.
Among all the statements , Option A , The eruption of a volcano increases the concentration of particles in the atmosphere, which decreases the amount of energy that can reach Earth from the Sun in the short term , correctly describe the relationship between the event and its effect on energy inputs and outputs.
To know more about Energy
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What is the molar mass of H2SO4?
(Molar mass of H = 1.0079 g/mol; S = 32.065 g/mol; O = 15.999 g/mol)
Answer: 98.08 g/mol
Explanation:
i just took this test and got it right
Answer:
A
Explanation:
What volume of water must be added to 10.5 mL of a pH 2.0 solution of HNO3 in order to change the pH to 4.0 g
Answer:
[tex]V'=1040ml[/tex]
Explanation:
From the question we are told that:
Initial Volume [tex]V_1=10.5mL[/tex]
Initial Aciditity of [tex]HN0_3 pH_1=2.0g[/tex]
Finial Aciditity of [tex]HN0_3 pH_2=4.0g[/tex]
Generally the equation for Acidity &Volume Relationship is mathematically given by
[tex]N_1V_1=N_2V_2[/tex]
Therefore
[tex]V_2=\frac{N_1V_2}{N_2}[/tex]
[tex]V_2=\frac{10^{-2}*10.5}{10^{-4}}V_2=1050ml[/tex]
Therefore
Change in Water volume is
[tex]V'=V_2-V_1[/tex]
[tex]V'=1050ml-10ml[/tex]
[tex]V'=1040ml[/tex]
PLS HELP ME PLZ AND THANKS
Answer:
q6= third option
q7= third option
Explanation:
kinetic molecular theory deals with temperature
pressure inversely proportional to volume so when volume doubled, pressure halved given that mass and temperature constant
12. The reaction 2NO, (g) = N20,(g) reaches equilibrium.
How does increasing the pressure on this system affect the amount o
The amount of N20 remains the same.
The amount of N20 increases.
The amount of N20 decreases.
Answer:
The amount of N2O4 increases.
Explanation:
Based on LeCh's principle, a change in the state of an equilibrium produce an effect in the system that try to restore the initial equilibrium.
For example, in the problem, the change is the increasing in the pressure. The system will try to decrease the pressure of the system. To decrease the pressure the system needs to decrease the moles of gas. As 2 moles of NO2 produce 1 mole of N2O4, the system will:
Shift to the right increasing the amount of N2O4 and decreasing the amount of NO2. Right option is:
The amount of N2O4 increases.Which compounds, on heating with an excess of concentrated sulfuric acid, produce only one product with molecular formula C7H10? [choices on the picture]
Answer:
1 and 2
Explanation:
When Concentrated H2SO4 reacted with the alcohols, they produce cycloalkenes. This is a mechanism known as dehydration of alcohols with an acid catalyst. This is because concentrated H2SO4 acts as a great oxidizing agent. In the process, the alcohols are heated to a high temperature with an excess of pure sulfuric acid. By passing the gases through a sodium hydroxide solution, the carbon dioxide and sulfur dioxide produced by reactive species are eliminated. The reaction mechanism shown in the image below indicates that only compounds 1 and 2 produce only one product.
Complete and balance equation KI(aq)+BaS(aq)→
The balanced reaction equation is; 2KI(aq)+BaS(aq)→ K2S(aq) + BaI2(aq)
What is equation?A chemical equation shows the conversion of reactants into products. Recall that in a chemical reactions, reactans interact with each other to yield products.
For the reaction we have in the question,the complete reaction equation is; 2KI(aq)+BaS(aq)→ K2S(aq) + BaI2(aq)
Learn more about reaction equation; https://brainly.com/question/16921139
For the given reaction, what volume of CO2 can be produced from 3.6 L of O2 , assuming an excess of CO ? Assume the temperature and pressure remain constant. 2CO(g)+O2(g)⟶2CO2(g)
2NO(g) + O2(g) ==> 2NO2(g) ... balanced equation
From this balanced equation we see that 2 moles NO reacts with 1 mole O2. At constant pressure and temperature, we can also say that 2 liters of NO reacts with 1 liter of O2. Then we can determine volume of O2 needed to react with 4.8 L of NO as follows:
4.8 L NO x 1 L O2 / 2 L NO = 2.4 L of O2 required
If you test an unknown organic compound and find it to be soluble in 5% aqueous NaHCO3, what functional group does it probably contain?
Answer:
carboxylic acid
Explanation:
Phenols will not be water-soluble unless a strong base is used (10% NaOH), and amines are only water-soluble if acid is used.
This kind of bond is formed when an atom with low electronegativity donates electrons to an
atom with high electronegativity.
Answer:
Ionic Bond
Explanation:
The atom with the higher electronegativity wants to fill its valence electron shell (meaning it wants 8 electrons in this shell). The atom with lower electronegativity will want to empty or donate an electron so that it can have an empty valence shell.
For the unbalanced reaction below, calculate how many grams of oxygen form when 2.72 g of potassium chlorate completely reacts.
KClO3(s) --> KCl(s) + O2(g)
Answer:
1.06g O2
Explanation:
Let's first balance the equation.
2KClO3 > 2KCl + 3O2
We're going to go from:
Grams of KClO3: 2.72gto moles, using molar mass of KClO3: 122.5g/molWe'll convert to O2 using a mole ratio, where we have 2 mols of KClO3 to 3 mols of O2.To grams of O2 using molar mass: 32g/mol[tex]2.72g x (\frac{1 mol}{122.5g} * \frac{3 mol O2}{2 mol KClO3} * \frac{32g}{1 mol} )= 1.06 g[/tex]
CH4 (g) + O2 (g) -> CO2 (g) + H20 (g)
Answer:
CH4(g) + 2O2(g) -> CO2 + 2H2O
Explanation:
Im not sure what the question is but this is the balanced equation.
In the beggingin, there were:
1 C on each side
4 H on the reactants and 2 H on the products
2 O on the reactants and 3 O on the products.
Multiplying the H on the products side by 2 evened out the Hs but the Os became 4 on the products side and 2 on the reactants side so Multiply the O on the products side by 2 evens out the reactans and the products resulting in:
1 C on each side
4 H on each side
4 O on each side
Cuanto equivale 1000 yardas a 1 pie, 1 metro y 1 centímetro
Respuesta:
3000 ft
914.4 m
9.144 × 10⁴ cm
Explicación:
Paso 1: Información provista
Longitud: 1000 yd
Paso 2: Convertir 1000 yd a pies (ft)
Usaremos el factor de conversion 1 yd = 3 ft.
1000 yd × 3 ft/1 yd = 3000 ft
Paso 3: Convertir 1000 yd a metros (m)
Usaremos el factor de conversion 1 yd = 0.9144 m.
1000 yd × 0.9144 m/1 yd = 914.4 m
Paso 4: Convertir 914.4 m a centimetros (cm)
Usaremos el factor de conversion 1 m = 100 cm.
914.4 m × 100 cm/ 1 m = 9.144 × 10⁴ cm
Carbon can be found in...
Answer:
as the gas carbon dioxide in the atmosphere
Explanation:
A solution containing more solute than the equilibrium amount is called A solution containing more solute than the equilibrium amount is called an unsaturated solution. a dilute solution. a supersaturated solution. a concentrated solution. a saturated solution.
Answer:
a supersaturated solution.
Explanation:
Dissolution can be defined as the process of dissolving or dissociating a solute in solid, liquid or gaseous phase into fragmented particles by a solvent in order to form a solution.
In Chemistry, a solute can be defined as a substance that is typically dissolved in a liquid solvent such as water, coffee, tea, etc., to produce a solution.
For dissolution to occur in solids, the crystalline structure of the substance must be broken up so as to release ions, atoms or molecules to produce a solution.
For liquid and gases, the substance to be dissolved must form a non-covalent bond with the solvent to produce a solution.
During the process of dissolution, a solute maybe completely ionized, partially ionized, or it may remain intact.
Generally, when a solution contains more solute than the equilibrium amount it's called a supersaturated solution.
However, when a solution contains lesser solute than the equilibrium amount it's called an unsaturated solution.
Also, when a solution is in dynamic equilibrium with the dissolved solute, it's called a saturated solution.
STRONGEST METALL ON EARTH
Answer:
tungstun
Explanation:
Answer:
tungsten
Explanation:
strongest out of any natural metal (142,000 psi).
8.87. Natural Weathering of Ores Iron is oxidized in a number of
chemical weathering processes. How many moles of O2 are
consumed when one mole of magnetite (Fe3O4) is converted
into hematite (Fe2O3)?
Answer:
0.25 mole of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
4Fe₃O₄ + O₂ —> 6Fe₂O₃
From the balanced equation above,
4 moles of Fe₃O₄ reacted with 1 mole of O₂.
Finally, we shall determine the number of mole of O₂ required to react with 1 mole of Fe₃O₄. This can be obtained as follow:
From the balanced equation above,
4 moles of Fe₃O₄ reacted with 1 mole of O₂.
Therefore, 1 mole of Fe₃O₄ will react with = (1/4) = 0.25 mole of O₂.
Thus, 0.25 mole of O₂ is required for the reaction.
When does a redox reaction produce electricity?
A. Only when an electrical device is attached
B. Whenever electrons are transferred between atoms
C. When electrons are transfered, and a pathway for electrons is provided
D. Whenever a pathway for electrons is provided
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 12.8 g of hydrochloric acid is mixed with 7.0 g of sodium hydroxide. Calculate the minimum mass of hydrochloric acid that could be left over by the chemical reaction. Round your answer to significant digits.
Answer:
Mass of HCl leftover = 6.4 g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
NaOH + HCl —> NaCl + H₂O
Next, we shall determine the masses of NaOH and HCl that reacted from the balanced equation. This can be obtained as follow:
Mass of NaOH = 23 + 16 + 1
= 40 g/mol
Mass of NaOH from the balanced equation = 1 × 40 = 40 g
Molar mass of HCl = 1 + 35.5 = 36.5 g/mol
Mass of HCl from the balanced equation = 1 × 36.5 = 36.5 g
SUMMARY:
From the balanced equation above,
40 g of NaOH reacted with 36.5 g of HCl.
Next, we shall determine the mass of HCl required to react with 7 g of NaOH. This can be obtained as follow:
From the balanced equation above,
40 g of NaOH reacted with 36.5 g of HCl.
Therefore, 7 g of NaOH will react with = (7 × 36.5)/40 = 6.4 g of HCl.
Thus, 6.4 g of HCl is required for the reaction.
Finally, we shall determine the leftover mass of HCl. This can be obtained as follow:
Mass of HCl given = 12.8 g
Mass of HCl that reacted = 6.4 g
Mass of HCl leftover =?
Mass of HCl leftover = (Mass of HCl given) – (Mass of HCl that reacted)
Mass of HCl leftover = 12.8 – 6.4
Mass of HCl leftover = 6.4 g
Based on a specific example of titration method. How do titration methods play a role in agriculture industry?
Answer:
Titration is an analytical technique that is widely used in the food industry. It allows food manufacturers to determine the quantity of a reactant in a sample. For example, it can be used to discover the amount of salt or sugar in a product or the concentration of vitamin C or E, which has an effect on product colour.
Answer:
How is titration used in the industry?
Titration is an analytical technique that is widely used in the food industry. It allows food manufacturers to determine the quantity of a reactant in a sample. For example, it can be used to discover the amount of salt or sugar in a product or the concentration of vitamin C or E, which has an effect on product colour.
help i’ll give u points
Answer:
60ug
Explanation:
If it has experienced two half lives, that means it has been halved twice. in that case, to undo it, just multiply it by two twice. 0.15ug * 2 = 0.30ug. 0.30ug * 2 = 0.60ug. Hope this helps.
What conclusion best supports Lamar work?
Answer:
The Answer is - (B)
Explanation:
I Just took the test on edg
12. Which of the following metals is NOT obtained by commercial
electrolytic process?
B) AI
C) Cu
A) Ag
D) Na
