Answers
Answer:
70
Explanation:
20 x 5 vials = 100mg
therefore 5 vials required each day.
Two weeks = 14 days
14 days x 5 vials = 70 vials
Related Questions
A radioactive sample is placed in a closed container. Two days later only one-quarter of the sample is still radioactive. What is the half-life of this sample?
Answers
Answer:
2
Explanation:
The sample has halved twice.
1/2 of 1/2 is 1/4, and 1/2 of 1 is 1/2.
what are the two sources of energy for earths geological systems?
Answers
Answer:
radioactive decay or solar radiation
Explanation:
KCl + CaNO3 net ionic equation
Answers
KCl → k+ + Cl. The ensuing aggregate of ions is identical in each pre-and publish-blend unit of compounds. both comprise Na+, Cl-, okay+, and Br- ions, and no insoluble compounds can result from any mixture of those ions.
The three rules for writing net ionic equations are simply pretty trustworthy. only do not forget to break apart the (aq) substances. best split strong electrolytes.
Delete any ions that seem on both sides of the equation. when an aqueous solution of potassium chloride KCl, while combined with silver nitrate AgNO3 answers insoluble AgCl forms as a white substance. this is an example of a double displacement reaction. due to the fact potassium ion and silver ions displace collectively in the product formation.
The net ionic equation is a chemical equation for a response that lists best those species collaborating inside the reaction. The internet ionic equation is generally utilized in acid-base neutralization reactions, double displacement reactions, and redox reactions.
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What is kintec energy?
Answers
over
In order for an object to be buoyant, there must be a difference in
the area of the object.
A. force of gravity
B. density
C. fluid pressure
D. mass
Answers
Answer:
fluid pressure
Explanation:
a p e x
which of these mixtures are heterogeneous? salt and water granite (a type of rock with multicolor spots) brass (an alloy of copper and zinc) oil and water
Answers
The one which is the heterogeneous mixture is the correct option is oil and water.
The heterogeneous mixture are the mixture that can be defined as the combination of the two more substance that are not completely soluble and are easily be separated from each other by the physical means. The homogeneous mixture are the type of the mixture in which the two more substance combine and are completely soluble.
The mixture of oil and water are the heterogeneous mixture, because these two liquids are immiscible as they can be separated on the basis of the density. Therefore , oil and water are heterogenous mixture.
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yup thas ittkew efjejkejg ghioen
Answers
Which of the following examples from everyday life are made possible or explained possible or explained by modern chemistry
Answers
Answer: Where is the folowing?
Explanation:
Which factors in an ecosystem provide food (plants, fish, and livestock) or inhibit agriculture (insects)?
O abiotic
O antibiotic
Obiotic
O biometric
Answers
Answer:
biotic
Explanation:
Describes the chemical reaction (s) that produce AMD. Equations
are balanced and formatted to show subscripts.
Pls help I’m so confused
Answers
FeS2 + 7O2 + H2O → Fe2+ + 2SO4^2- + 2H+
This reaction is an oxidation reaction, where the sulfide mineral is oxidized to sulfate ions and ferrous ions are released. The ferrous ions can then react with water and oxygen to form ferric hydroxide (Fe(OH)3), which is a yellow-orange solid that contributes to the characteristic color of AMD.
The overall reaction can be written as:
4FeS2 + 15O2 + 14H2O → 4Fe(OH)3 + 8SO4^2- + 16H+
This reaction shows that four molecules of pyrite react with 15 molecules of oxygen and 14 molecules of water to produce four molecules of ferric hydroxide, eight molecules of sulfate ions, and 16 molecules of hydrogen ions. The reaction is balanced to ensure that the number of atoms of each element is the same on both sides of the equation.
7.25 g of a mixture of KCl and KClO3 is heated with MnO2 catalyst and the mass of the mixture is found to be 5.50 g after heating. What is the mass percentage of KClO3 in the initial mixture? (K: 39.0 g/mol, Cl: 35.5 g/mol, O: 16.0 g/mol)
Answers
The mass percentage of KClO₃ in the initial mixture, given that the initial mixture has a mass of 7.25 g, is 62.2%
How do i determine the mass percentage of KClO₃?First, we shall determine the molar mass of KClO₃ and KCl. Details below:
For KClO₃
Molar mass of K = 39 g/molMolar mass of Cl = 35.5 g/molMolar mass of O = 16 g/molMolar mass of KClO₃ = ?Molar mass of KClO₃ = 39 + 35.5 + (3 × 16)
Molar mass of KClO₃ = 39 + 35.5 + 48
Molar mass of KClO₃ = 122.5 g/mol
For KCl
Molar mass of K = 39 g/molMolar mass of Cl = 35.5 g/molMolar mass of KCl =?Molar mass of KCl = 39 + 35.5
Molar mass of KCl = 74.5 g/mol
Next, we shall determine the mass of KClO₃ in the initial mixture. Details below:
Molar mass of KClO₃ = 122.5 g/molMolar mass of KCl = 74.5 g/molMass of mixture = 7.25 gMass of KClO₃ =?Mass of KClO₃ = [molar mass of KClO₃ / molar mass of (KClO₃ + KCl)] × mass of mixture
Mass of KClO₃ = [122.5 / (122.5 + 74.5)] × 7.25
Mass of KClO₃ = 4.51 g
Finally, we shall determine the mass percentage of KClO₃. Details below:
Mass of KClO₃ = 4.51 gMass of mixture = 7.25 gMass percentage of KClO₃ =?Mass percentage of KClO₃ = (mass of of KClO₃ / mass of mixture) × 100
Mass percentage of KClO₃ = (4.51 / 7.25) × 100
Mass percentage of KClO₃ = 62.2%
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write the atomicity of oxygen
Answers
Hydrogen peroxide, H2O2, decomposes according to the equation above. This reaction is thermodynamically favorable at room temperature.
(a) A particulate representation of the reactants is shown below in the box on the left. In the box below on the right, draw the particulate representation of all the molecules that would be produced from these four reactant molecules.
Answers
Hydrogen peroxide, H2O2, decomposes as 4H₂O₂ → 4H₂O + 2O₂ when four reactant molecules are used.
The following diagram illustrates how hydrogen peroxide decomposition chemically: 2H₂O₂ → 2H₂O + O₂
As a result, one oxygen molecule and two water molecules result from the breakdown of two hydrogen peroxide molecules. Numerous chemical substances spontaneously react with molecular oxygen to produce peroxides in the form of free radicals. Given that there are four hydrogen peroxide molecules breaking down in the diagram, we have;
4H₂O₂ → 4H₂O + 2O₂
The breakdown of hydrogen peroxide, H2O2, into water and oxygen gas is the first stage of this reaction. At room temperature, this reaction is thermodynamically advantageous.
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Select the correct terms to complete this statement about charged particles.
Like charges attract | repel, and opposite charges attract repel. According to Coulomb's law, as the distance between two charged particles decreases, the force between the particles decreases I increases. As the magnitude of the charges decreases, the force decreases | increases.
Answers
Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.
On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.
In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.
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2 Li3N +3 MgO → Mg3N₂ + 3 Li₂O
If 5.7 moles of Li3N are used, how many grams of Li₂O are produced?
Answers
HELP FAST PLZ!!!!!!!!!!!!!_____ energy from the outlet transfers energy to the light bulband
the bulb lights up,
heat
electrical
kinetic
potential
Answers
Answer:
electrical
Explanation:
It wouldnt be kinetic or potential since both of those have to do with motion, and it would not be heat because heat does not power a light bulb. Therefore, the answer is electrical.
What laboratory equipment do you need to prepare 250 mL of a 0.010 M solution of NaCl from a stock solution?
Answers
The equipment we used to prepare 250 ml of a 0.010 M solution of NaCl from a stock solution is Volumetric flask (piece of lab).
It is calibrated to comprise a precise volume (v) at a given temperature.
It is used for accurate results in dilutions and to prepare a solutions that is needed according to the experiment.
Volumetric flask short form is vol flask.
A stock solution is defined as the standard solution made using nearly accurate experiment.
Example of stock solution - Two M sol of tris-HCL, 5M sol of NaCl.
Stock Solution formula = C1*V1 = C2*V2
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PLEASE ANSWER QUICKLY!!!!
2KI (aq) + Cl₂(g) → 2KCl(aq) + 1₂(g)
What volume of 12 gas forms when
21 L Cl2 react at STP?
[?] L 12
Answers
The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.
To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.
The ideal gas law equation is given by:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles
R = ideal gas constant
T = temperature
At STP, the pressure is 1 atm, and the temperature is 273.15 K.
From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.
Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.
Therefore, the volume of I2 gas formed is 21 L.
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Draw the Lewis structure of sulfanilamide. Include all lone pairs
Answers
Sulfanilamide (NH2-SO2-NH-C6H4-NH2) can be represented by the following Lewis structure.
What is the Lewis structure?
The Lewis structure for a molecule is a type of structural formula that shows how the atoms are bonded together in a molecule. It uses symbols to represent the elements and to show the number of valence electrons. It also shows the number of covalent bonds between the atoms and any lone pairs of electrons.
N-H | S=O | N-C=C-C=C-C=C-N
H | | H
H | | H
H | | H
The Lewis structure of sulfanilamide (NH2-SO2-NH-C6H4-NH2) consists of two nitrogen atoms, two oxygen atoms, and six hydrogen atoms. The two nitrogen atoms are bonded to each other by a double bond, and each nitrogen is also bonded to two hydrogen atoms. The two oxygen atoms are both single bonded to the two nitrogen atoms, and each oxygen is also bonded to one hydrogen atom. The six hydrogen atoms are all single bonded to the other atoms in the structure.
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What method is used to removed the unreacted copper (II) carbonate?
Answers
Answer:
Filtration
Explanation:
Metal carbonate is insoluble, it is possible to filter off the unreacted substances leaving the desired salt solution
what does dry ashing mean
Answers
A student makes a model of a mineral crystal. The scale is 1:24. The crystal in the model is 5 cm long. How long Is the real-life crystal. A. 120cm B. 0.96cm C. 4.8cm D. 29cm
Answers
The length of the real-life crystal is 120 cm which is 24 times longer than the length of the crystal in the model.
How long Is the real-life mineral crystal?Given that, a student makes a model of a mineral crystal.
The scale is 1:24. The crystal in the model is 5 cm long.
We are given a scale of 1:24, which means that every unit in the model represents 24 units in real life.
To find the length of the real-life crystal, we need to use the scale factor of 24.
We can set up a proportion to solve for the real-life length of the crystal:
1 unit in the model : 24 units in real life
5 cm in the model : x cm in real life
Using cross-multiplication, we get:
1 × x = 24 × 5
x = 24 × 5
x = 120cm
Therefore, the real-life crystal measures 120cm.
Option A) 120cm is the correct answer.
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Which statement is FALSE?
1) atoms in the same period have the same number of outer electrons
2) atoms in the same group behave in a similar manner during a chemical
reaction
3) the outer electrons are the electrons in the outer energy level of an atom
4) the number of outer electrons may be used to predict how an element would
react in a chemical reaction
Answers
Answer: I think the answer is 2.
Explanation:
Plz help me I am timed!!
Answers
Answer:
What do you need help with
Explanation:
Explanation:
okay I'll help but whats the question
please help me with these
Answers
1) Diesel has a higher viscosity than petrol.
2) Petrol is more flammable than diesel.
3) The formula will be C₁₀H₂₂.
4) The equation is; 2C8H18+25O2→16CO2+18H2O.
What is the hydrocarbon?Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.
Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.
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Someone please help me with this
Answers
Answer:
I think A should be the answer because oxygen is the chemical change of carbon.
A beam of x-ray of wavelength 0.071 nm is diffracted by (110) plane of rock salt with lattice constant (a) 0.28nm. find the glancing angle for the second order diffraction
Answers
The glancing angle for the second order diffraction of X-rays with a wavelength of 0.071 nm diffracted by the (110) plane of rock salt with a lattice constant of 0.28 nm can be calculated using Bragg's law:
2d sinθ = nλ
where d is the interplanar spacing of the (110) plane, n is the order of the diffraction, λ is the wavelength of the X-rays, and θ is the glancing angle.
For the second order diffraction (n = 2), we have:
2d sinθ = 2λ
The interplanar spacing of the (110) plane can be calculated using the formula:
d = a/√(h^2 + k^2 + l^2)
where a is the lattice constant, and h, k, and l are the Miller indices of the (110) plane. For rock salt, h = 1, k = 1, and l = 0 for the (110) plane.
Substituting the values given in the problem, we get:
d = 0.28 nm / √(1^2 + 1^2 + 0^2) = 0.14 nm
Substituting the values for d, n, and λ, we get:
2(0.14 nm) sinθ = 2(0.071 nm)
Simplifying, we get:
sinθ = 0.51
Taking the inverse sine, we get:
θ = 30.2 degrees
Therefore, the glancing angle for the second order diffraction is approximately 30.2 degrees.
A balloon with a volume of 2.0 L is filled with gas at 3 atm. If the pressure is reduced to 1.5 atm without a change in temperature, what would be the new volume of the balloon?
Answers
According to this video, how do scientists use data to study/monitor earthquakes and tsunamis?
Answers
Answer:
ewan ko po
Explanation:
sana makatulong
Consider the structure of capsaicin, the active ingredient in pepper spray. How many polar bonds are present in the molecular structure
Answers
The structure of capsaicin is shown in the image attached. There are four polar bonds in capsaicin.
What is capsaicin?Capsaicin is an organic molecule found in pepper spray. It is the major active ingredient used in the making of pepper spray. The structure of the molecule have been shown in the image attached to tis answer.
We can see that there are four polar bonds in the molecule. Note that polar bonds are bonds between two atoms that have a wide difference in electronegativity values.
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