Mixture of a 25.00 mL aliquot of the sample solution with 5.00 mL of a 0.250 ppm warfarin standard yielded a solution with an intensity of 670. Calculate the percentage of warfarin in the sample.
Answer:
750
Explanation:
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Answer:
seriously ....,........
I don't like chemistry
i’m sooo confused please help
Answer:
I don't know if this will really help you but I'll try to explain it
Explanation:
it wants you tell some things you see on the graph. Some examples you can say is what kind of bond it is and things like that. You can use a periodic table
Which two characteristics determine the strength of the gravitational force
between two objects?
A. The distance between the objects' centers
B. The distance between the objects' surfaces
C. The amount of matter in the objects
D. The total volume of the objects
Answer:
A and C
Explanation:
I took the test
The distance between the objects' centers and The amount of matter in the objects are two characteristics determine the strength of the gravitational force between two objects.
What is Gravitational force?All objects with mass or energy are attracted to one another by gravity, which is a fundamental interaction.
The electromagnetic force, the weak interaction, and the strong interaction are all significantly stronger than gravity, which is by far the weakest of the four fundamental interactions.
As a result, it has no appreciable impact on subatomic particle level phenomena. However, at the macroscopic level, gravity is the most important interaction between objects and governs the motion of planets, stars, galaxies, and even light.
Therefore, The distance between the objects' centers and The amount of matter in the objects are two characteristics determine the strength of the gravitational force between two objects.
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The molarity of an aqueous solution of CaCl is defined as the
Answer:
Molarity of aqueous solution of CaCl2 can be defined as moles of CaCl2 per litre of solution
What is the mole ratio between FeCl3 and Fe(C5H7O3)3 ?
Answer: 162.2 g FeCl3. mL of soln = 0.07028 mol FeCl3x ... mol FeCl3 = mol Fe(OH)3 = 0.01291 mol ... (a) MaVa = MbVb since HCl and KOH react in a 1:1 molar ratio.
Explanation:
In order to complete a reaction, a chemist needs to react 4 moles of aluminum atoms with 3 moles of oxygen molecules. How many grams of aluminum would be required to make this happen?
Answer:
4 Al + 3 O2 → 2 Al2O3
To react with 4 moles of Al, (3×32) g oxygen is required.
So, to react with 2.4 moles of Al, {(3×32)/4} × 2.4 = 57.6 g oxygen is required.
Hope this helps.
Fission is the of a heavy nucleus into two smaller nuclei. This process is used in __________ .
Nuclear Fission
Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of a large amount of energy. In nuclear fission the nucleus of an atom breaks up into two lighter nuclei.
Nuclear fission is a process where the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.
giving brainly for correct answer! :)
Answer:
Mass is the amount of matter in an object
Answer:
Mass
Explanation:
matter is weighed by the mass of an object
which best describes how heat energy moves within the system?
Answer: B
Heat always travels from warmer areas to cooler areas in the form of radiation or convection currents due to the temperature difference. You could kind of think of this movement like diffusion: travelling from a higher concentration to a lower one (if you take biology). This is how a gas heats up a pan on the stove or a radiator warms a room
What is the mass/volume percent of a solution containing 32.6g of CaCl2 in 375mL of water?
How many peaks will you observe in the 13C spectrum of cyclohexane ?
1 1 - incorrect
3
6
3 peaks
Explanation:
You can do this perfectly well without referring to chemical shift tables at all. In the spectrum there are a total of three peaks - that means that there are only three different environments for the carbons, despite there being four carbon atoms.
A \pu{1.60 g}1.60 g1, point, 60, space, g calcium supplement contains 37.8\%37.8%37, point, 8, percent \ce{Ca}CaC, a by mass. The calcium is present in the supplement as \ce{CaCO3}(s)CaCOX 3 (s) (molar mass \pu{100.09 g/mol}100.09 g/mol100, point, 09, space, g, slash, m, o, l). How many grams of \ce{CaCO3}(s)CaCOX 3 (s) are in the calcium supplement?
A 1.60 g calcium supplement that contains 37.8% Ca by mass, contains 1.51 g of CaCO₃.
We want to calculate the mass of CaCO₃ in a 1.60 g supplement. We need to consider the following relationships.
The mass percent of Ca is 37.8%, that is, there are 37.8 g of Ca every 100 g of supplement.The molar mass of Ca is 40.08 g/mol.The molar ratio of Ca to CaCO₃ is 1:1.The molar mass of CaCO₃ is 100.09 g/mol.[tex]1.60gSup \times \frac{37.8gCa}{100gSup} \times \frac{1molCa}{40.08gCa} \times \frac{1molCaCO_3}{1molCa} \times \frac{100.09gCaCO_3}{1molCaCO_3} = 1.51gCaCO_3[/tex]
A 1.60 g calcium supplement that contains 37.8% Ca by mass, contains 1.51 g of CaCO₃.
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A 1.60 g calcium supplement contains 37.8% Ca by mass. The calcium is present in the supplement as CaCO₃(s) (molar mass 100.09 g/mol). How many grams of CaCO₃(s) are in the calcium supplement?
If 0.600mol of chloride gas reacted with 0.500mol of aluminium metal to produce aluminium chloride,which reactant is in excess?how many moles of aluminium chloride can be produced during the reaction.
Answer:
The balanced chemical equation: 2 Al + 3Cl2→ 2 AlCl3
Mole-mole relationship: 2 moles Al + 3 moles Cl2→ 2 moles AlCl3
Given: 0.600 moleCl2; 0.500 mole Al
Required: Excess reactant___; Number of moles of AlCl3 produced__
Solution: Use dimensional analysis using the mole-mole rel
0.600 mole Cl2 * 2 moles Al/3 moles Cl2 = 0.4 mole Al
0.5 mole Al* 3 moles Cl2/2 moles Al = 0.75 mole Cl2
Based on the given:
0.6mole Cl2 + 0.4 mole Al ( this is possible based on the given)
0.5mole Al + 0.75 mole Cl2 (this is not possible because the given is only 0.600 mole of Cl 2)
Answer: Excess reactant is Al; Limiting reactant is Cl2
The amount of AlCl3 produced = 0.6 mole Cl2 + 0.4 mole Al = 1.0 mole AlCl3
Hi! ❤️ , im looking for some help here. ill give brainliest if able to.
A student builds a model of a race car. The scale is 1:15. In the scale model, the car is 8 cm tall. How tall is the actual car?
Answers:A. 120 cm#CarryOnLearning
pls help i am in 8th grade k12
Answer:
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Explanation:
When performing an experiment, the following footwear is best
Answer:
sneakers
Explanation:
Answer:
closed toe shoe
Explanation:
becusae if a cemcal spills it cant hurt your feet
An exothermic reaction releases 86.5 kJ. How many kilocalories of
energy are released?
convert 3.49g/cm³ to kg/m³
1 g/cm3 to kg/m3 = 1000 kg/m3
3.49 g/cm³= 3.49 x 1000
= 3490 kg/m³
Ans: 3490 kg/m³
what is a nucleus and what are the functions?
How do I calculate the pH of the solution given the following [H3O+] or [OH−] values?[OH−] = 4.0×10^−11 M?
pH= _______
what is the functional group and homologous series of ethyl butyrate?
Answer:
Functional group: ROR'
Homologous series: ester [C6H12O2]
Mark brainliest please
element Q,X, and Z are in the same group on the periodic table and are listed in order of increasing atomic number.The melting point of element Q is -219 Celsius and the melting point of element Z is -7 celsius. Which temperature is closest to the melting point of element X
Answer:
Very low ionization energy: metal bonds easily: group 1, or maybe 2 low melting.
Explanation:
Identify the reactant that gets oxidized in the following reaction.
2 AgNO₃(aq) + CaI₂(aq) → 2 AgI(s) + Ca(NO₃)₂(aq)
A) Ag in AgNO₃
B) I in CaI₂
C) N in AgNO₃
D) Ca in CaI₂
E) This is not an oxidation/reduction type of reaction
Answer:
E) This is not an Oxidation/ Reduction type of reaction
Explanation:
Oxidation involves the loss of electrons while reduction involves the addition of electrons. None of the elements change their oxidation number in the reaction, so this is not an oxidation/reduction type of reaction.
The addition of oxygen and the removal is electrons is called oxidation. In a reaction that has both the process is called the redox reactions.
The correct answer to the question is option E
In this reaction, not any elements have the loose and gain the electrons in order to tell the oxidation and reduction.
This reaction is a neutralization reaction.
Hence, the correct answer is E that is not an oxidation/reduction type of reaction.
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what i compound is
FeI2
Answer:
iodide
Explanation:
Answer:
Iron(II) iodide
Explanation:
Given: 800 mL of 2.5 M NaCl. Find grams of NaCl needed
Answer:
Answer: molar mass of NaCl is 58.5 gm/mol. This refers to the fact that 1 mole of NaCl weighs 58.5 gram.
Explanation:
Convert 21 grams of radon into atoms of radon.
Answer:
The atomic mass of radon is 222.
Explanation:
. That means that one mole of radon weighs 222 grams (222 grams/moles). We can therefore make the following equation:
Grams × (1/222) = Moles of Radon
Sắp xếp 4 axit sau theo thứ tự tính axit tăng dần:
CH3-CH2-CH2-COOH (1), CH3-CH2-CHCl-COOH (2)
CH3-CHCl-CH2-COOH (3), CH2Cl-CH2-CH2-COOH (4
How many molecules of aspartame are present in 1.00 mg of aspartame?
Answer:
0.2 x 10^19
Explanation:
Select all the correct answers.
To formulate hypotheses and construct theories, astronomers analyze data. This analysis helps them find trends that may exist. Which two statements does the data in this table support? If you’re not sure, take a guess.
A. The farther a planet is from the Sun, the longer its orbital period is.
B. Planets with a greater diameter have longer days.
C. The closer a planet is to the Sun, the greater its axial tilt is.
D. Planets with greater mass tend to have more moons.
Answer: A. The farther a planet is from the Sun, the longer its orbital period is, and D. Planets with greater mass tend to have more moons.
Explanation: trust
