The pressure in mmHg forecasted today is 783 mmHg
Pressure is the force acting perpendicular to the area of a surface. Pressure is given by:
Pressure = Force/Area
The pressure of a gas is the force exerted on the walls of its container by the gas. Pressure can be measured in atm, mmHg, etc.
1 atm = 760 mmHg
1.03 atm = 760 mmHg per atm * 1.03 atm = 783 mmHg
Therefore the pressure in mmHg forecasted today is 783 mmHg
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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
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.
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 functional group and homologous series of ethyl butyrate?
Answer:
Functional group: ROR'
Homologous series: ester [C6H12O2]
Mark brainliest please
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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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
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?
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
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 is the mass/volume percent of a solution containing 32.6g of CaCl2 in 375mL of water?
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:
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:
U ever get an answer
Use the choose reaction drop down menu to see other equations, and balance them. Check your answers and then write the balanced equations. AI+ HCI-> AICI3+ H2
NaCI -> Na + CI2
Na2S + HCI -> NaCI + H2S
what i compound is
FeI2
Answer:
iodide
Explanation:
Answer:
Iron(II) iodide
Explanation:
The student burns 10 g of magnesium in air to produce magnesium oxide (MgO).
2Mg + 0 + 2MgO
Calculate the maximum mass of magnesium oxide that could be produced in the reaction.
Answer:
x=403/24,3 = 16.58 gm MgO
EXPLANATION
The student burns 10 g of magnesium in air to produce magnesium oxide (MgO)
2Mg + 0 + 2MgO
Calculate the maximum mass of magnesium oxide that could be produced in the reaction.
Oxygen exist in nature as O2, diatomic.
so
The student burns 10 g of magnesium in air to produce magnesium oxide (MgO).
2Mg + 02 + 2MgO
Calculate the maximum mass of magnesium oxide that could be produced in the reaction.
2 moles of Mg produce 2 moles of MgO
1 mole of Mg weighs 24.3 and produces 1 mole of MgO
Mg HAS AN ATOMIC MASS OF 24.3
Mg HAS A MOLAR MASS OF 24.3 +16 = 40.3gm/mole
so 24.3 gm of Mg produce 40.3 gm MgO
set up the ratio
10 gm Mg/x of MgO = 24.3/40.3
or
10/x = 24.3/40.3
cross multiply and isolate x (use Algebra I)
24.3x =403
x=403/24,3 = 16.58 gm MgO
Lattice energy is_______________ proportional to the distance between two ions in an ionic compound; therefore, the compound with the smaller lattice energy will have the _________________ distance between the ions.
Lattice energy is inversely proportional to the distance between two ions in an ionic compound; therefore, the compound with the smaller lattice energy will have the larger distance between the ions.
Discussion;
The lattice energy of an ionic compound is a measure of the strength of the bond in the compound.The lattice energy is Inversely proportional to the distance of the atoms apart.Read more:
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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
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jkhjkhjkh
Answer:
seriously ....,........
I don't like chemistry
How many molecules of aspartame are present in 1.00 mg of aspartame?
Answer:
0.2 x 10^19
Explanation:
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.
An exothermic reaction releases 86.5 kJ. How many kilocalories of
energy are released?
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:
what is a nucleus and what are the functions?
An initial solution of orange juice has a solute concentration of 0.50 M and a volume of 155.0 mL. What is the final solute concentration of the juice after its been diluted with 52.5mL of water?
Answer:
0.37 M
Explanation:
An initial solution of orange juice has a solute concentration of 0.50 M and a volume of 155.0 mL. What is the final solute concentration of the juice after its been diluted with 52.5mL of water?
the old molarity was 0.50 M, and a volume of 1555.0 ml
the new volume is a total of 155.0 ml + 52.5 ml =207.5 ml
so the new molarity is (155.0/207.5) X 0.50 M = 0.37 M
pls help i am in 8th grade k12
Answer:
zzxdczxc V
Explanation:
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
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
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
