Consider a different situation. An ice cube is placed in a cup, and the cup is filled to the brim with mineral oil, which has a density of 0.8 g/cm3. The density of ice is about 9% less than the density of liquid water, which is about 1 g/cm3. After the ice melts, what will happen to the level of the water/oil mixture in the cup
How many grams of nitrogen dioxide are required to produce 260 grams of nitrogen monoxide? 3NO2 + H20 → 2HNO3 + NO
Answer:
1196 g
Explanation:
N= 14 O= 16
every 3 moles of NO2 gives one mole of NO
So, 3[14 + (2×16)] = 138 grams of NO2
gives : 14+16 = 30 grams of NO
NO2 NO
138 30
? 260
Therefore, 260 × 138 ÷ 30 = 1196 g of NO2 are required
As student used a pen to draw a line across a piece of chromatography paper. he then placed a sample of dye on the drawn line for analysis . is the student doing the right thing? why?
Answer is in the photo. I can only upload it to a file hosting service. link below!
tinyurl.com/wpazsebu
The frequency of a wave can be calculated by dividing the speed of a wave by its wavelength. Calculate the frequency of a radio wave having a speed of 300,000,000 m/s and a wavelength of 0.00056 m.
Answer:
snovd vosb r
Explanation:
_______ prohibits and punishes certain conduct for the benefit of society.
Answer:
animal
Explanation:
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At what temperature (in K) does NH₃ have a density of 0.812 g/L at 1.17 atm?
Answer:
The temperature is "298.51 K".
Explanation:
The given values are:
Density of ammonia,
d = 0.812 g/L
Pressure,
P = 1.17 atm
Mass:
M = [tex]NH_3[/tex]
= [tex]14+ 1\times 3[/tex]
= [tex]17[/tex]
As we know,
⇒ [tex]PV=nRT[/tex]
∴ [tex]T=\frac{PV}{nR}[/tex]
[tex]=\frac{PV}{\frac{W}{M}\times R }[/tex]
[tex]=\frac{PVM}{W\times R}[/tex]
By putting the value of "W", get
[tex]=\frac{PVM}{V\times d\times R}[/tex]
[tex]=\frac{P\times M}{d\times R}[/tex]
On substituting the values in the above equation, we get
[tex]=\frac{1.17\times 17}{0.812\times 0.08205}[/tex]
[tex]=\frac{19.89}{0.06699}[/tex]
[tex]=298.51 \ K[/tex]
Answer:
299
Explanation:
Or 298.51 to be exact!
The empirical formula for compound is P2O5. The molar mass of the compound is 283.89g. What is the molecular formula?
Answer:
P4O10
Explanation:
(P2O5)n=283.89
62+80=283.89
142n=283.89
n=2
P2O10
The empirical and molecular formula are related by the formula, molecular formula=2×empirical formula ,meaning double the atoms present in empirical formula,hence molecular formula is P₄O₁₀.
What is empirical formula?Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.It does not make any mention of the arrangement of atoms or the number of atoms. The empirical formula gives information about the ratio of number of atoms which are present in a compound.
Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.
For the compound P₂O₅ the subscripts of phosphorous and oxygen are multiplied by 2 and hence the molecular formula P₄O₁₀.
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Ca3(PO4)2 + 3H2SO4 3CaSO4 + 2H3PO4.
What mass of concentrated H2SO4 (98% by mass) must be used to react completely
with 100.00 g of calcium phosphate?
100g
H2SO4 = 3x98x100/310 = 94.84g
used mass of h2so4x100/all mass of H2so4 = 98%
yx100/98=94.84x100/98 = 96.81.
Check the attached photo for clear answer.
What is the use of calcium phosphate?It may be used to treat conditions caused by low calcium levels such as bone loss (osteoporosis), weak bones (osteomalacia/rickets), decreased activity of the parathyroid gland (hypoparathyroidism), and certain muscle diseases (latent tetany).
Is calcium phosphate good for health?About Calcium Phosphate Supplements
It aids in healthy bone development and is crucial from infancy to adulthood. But, calcium does more than build strong bones. It's also very important for healthy digestion. Calcium aids in bile acid metabolism, excretion of fatty acids, and healthy gut microbiota.
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1. Chlorofluorocarbons (CFCs) are of interest because of their ability to destroy ozone molecules. A carbon-chlorine bon din the CFC molecule can be broken by sunlight, leaving a highly reactive free radical which then goes on to destroy the surrounding ozone molecules. The energy of a C-Cl bond is 328 kJ/mole. Calculate the wavelength of light needed to break a bond in a single molecule. In which region of the spectrum (infrared, visible, UV) does this wavelength fall
Answer:
See explanation
Explanation:
Energy of the photon (E) = 328 * 10^3/6.02 * 10^23 = 5.45 * 10^-19 J
Recall that E = hc/λ
h = Plank's constant = 6.36 * 10^-34 Js
c = speed of light = 3 * 10^8 m/s
λ = ??
λ = hc/E
λ = 6.36 * 10^-34 * 3 * 10^8/5.45 * 10^-19
λ = 3.5 * 10^-7 m
This falls into the UV region of the spectrum
What do scientist use to classify organisms?
Answer:
a Binomial Naming System
Explanation:
Your friend the archaeologist, who studies the ancient human past, has asked you to find a numerical date for some hominid artifacts found buried by ash from a volcanic eruption. To do this, you can use carbon-14 dating, which has a half-life of 5,730 years, or uranium-238, which has a half-life of 4.5 billion years. Based on their half-lives, which isotopic dating system will give your friend the most accurate numerical age
Answer:
I think it the carbon 14 which is a half life of 5730 because in 4.5billion years ago I don't think any human being existed on earth I'm not sure I hope that I helped you and good luck .
Carbon-14 dating will be used to find a numerical date for some hominid artifacts found buried by ash from a volcanic eruption.
What is carbon dating?
Radiocarbon dating also known as carbon dating or carbon-14 dating.
It is a method for establishing the age of an organic thing using the properties of radiocarbon, a radioactive carbon isotope.
Willard Libby created the approach in the late 1940s.
Thus, Carbon -14 dating will give your friend the most accurate numerical age.
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What’a the answer!!?
Answer:
2,1,2
1,2,1,1
the answer
Why it is true to say that calcium carbonate has both ionic and covalent bonds?
Answer:
Calcium carbonate is an ionically bonded compound.
Covalent Bond: This bond is formed because atoms share a pair of electrons through an orbital.
Unit 4.2 quiz chemistry
Balance C3H8 + O2 + CO2 + H2O
Assuming the second plus sign is a typo and was meant to be a reaction arrow, this would be the balanced equation:
C3H8 + 5O2 —> 3CO2 + 4H2O
Explain clearly in 2 ways each in which a soap and a detergent are similar and different.
Explanation:
the soap is the product made from a detergent
1) This rock is made out of cooled magma.
A) Igneous
B) Sedimentary
C) Metamorphic
D) Sandstone
2) This type of rock is made through the processes of heat and pressure.
A) Igneous
B) Sedimentary
C) Metamorphic
D) Sand
3) Sandstone is a sedimentary rock. How does sandstone form?
A) It melted and cooled.
B) It broke into sediment and then compacted.
C) It was heated and put under pressure.
D) Rocks don’t form; they stay as they are.
4) What type of rock can be broken down into sediment through weathering?
A) Igneous
B) Sedimentary
C) Metamorphic
D) All types of rocks
5) How does rock from a mountain turn into small pieces of rock?
A) Wind and rain break the rock into small pieces.
B) Earthquakes and natural disasters break the rock.
C) The sun's rays break the rock.
D) Everything breaks into pieces if you leave it out.
6) Can igneous rock underneath Earth’s outer layer change into sedimentary rock?
A) Yes, but it must be subducted first.
B) Yes, but it must be weathered first.
C) Yes, but it must be uplifted first.
D) No, igneous rock can never become sedimentary.
7) This energy source creates magma, which is melted rock that will turn into igneous rock.
A) Sun
B) Air
C) Earth's Interior
D) Water
8) This energy source helps create weather, which creates sediment to form sedimentary rocks.
A) Air
B) Sun
C) Water
D) Earth's Interior
9) What is the difference between magma and lava?
A) Magma is very hot, lava is cool.
B) Magma is molten rock within the earth; lava is molten rock on the earth's surface.
C) Magma is molten rock on the earth's surface; lava is molten rock within the earth.
D) Magma is cool, lava is very hot.
1. a) Igneous.
2. c) Metamorphic.
3. b) It broke into sediment and then compacted.
4. d) All types of rocks.
5. a) Wind and rain break down the rock into small pieces.
6. a) Yes, but it should be subtuced first.
7. c) Earth's interior.
8. c) Water.
9. b) Magma is molten rock within the Earth; lava is molten rock on the Earth's surface.
When one gram of liquid water at its boiling point is changed into water vapor
1.
334 J/g is gained from the surrounding environment
2.
334 J/g is released into the surrounding environment
3
2260 J/g is gained from the surrounding environment
4
2260 J/g is released into the surrounding environment
Answer: 2260 J/g is gained from the surrounding environment
When one gram of liquid water at its boiling point is changed into water vapor, 2260 J/g of energy is gained from the surrounding environment.
What is heat of vaporization?Heat of vaporization is the amount of heat that is required by any body during their transition process from liquid state to vapor state, at a particular temperature i.e. no change in temperature during whole process.
During the transition of one gram of liquid water into water vapor at its boiling point of 100°C, 2260 J/g energy is absorbed by the water for the formation of vapor.
Hence, option (3) is correct.
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Express
as
ordinary numbers.
3 x 10^0=
What are the two products of an acid base neutralization reaction?
Answer:
Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water.
Explanation:
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Answer: Water and NaCl is always formed
Explanation:
I hope this helped!
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What is the name of the variable that changes by itself in an experiment?
Answer:
the independent variable (sometimes known as the manipulated variable )
Explanation:
is the variable whose change isn't affected by any other variable in the experiment
Calculate the pH and percent ionization of a HC2H3O2 solution with a concentration of 0.500 M. (Ka = 1.8 x10-5)
Answer:
I can not see the file
Explanation:
Volume and moles are __________ related. This relationship can be calculated by using ___________ Law.
indirectly; Boyle’s
directly; Boyle’s
indirectly; Charles’
directly; Charles’
indirectly; Avogadro’s
directly; Avogadro’s
Answer:
The correct answer is - directly; Avogadro’s.
Explanation:
At the same temperature and pressure, gases of the same or equal volume have the same number of molecules. The relation between the moles of the gases and the volume of the gases are indirectly proportional to one another at the same temperature and pressure. This law is called Avogadro's law. In the case of an ideal gas of a particular mass has the volume and moles are directly proportional.
Thus, the correct answer is - directly; Avogadro’s.
Solid iron is mixed with a solution of copper (I) nitrate to form iron (III) nitrate solution and metal copper. (what is the equation)
Answer:
Fe + 3CuNO₃ → Fe(NO₃)₃ + 3Cu
Explanation:
Solid Iron = FeCopper (I) nitrate = CuNO₃ (Nitrate, NO₃⁻, always has a charge of -1).Iron (III) nitrate = Fe(NO₃)₃ (That way the compound has an overall neutral charge)Metal Copper = CuWriting the equation using symbols leaves us with:
Fe + CuNO₃ → Fe(NO₃)₃ + CuIt is not balanced yet. Now we balance the NO₃ species on the left side:
Fe + 3CuNO₃ → Fe(NO₃)₃ + CuFinally we balance the Cu species on the right side:
Fe + 3CuNO₃ → Fe(NO₃)₃ + 3CuPlease if you just want point TELL ME I can’t fail this.
Match the environmental stresses to what would happen in the chemical reaction. Think through the path from the carbon cycle - how CO2
CO2is removed from the atmosphere and stored in sinks and then how CO2
CO2is released from sinks and/or produced. Loss of carbon sinks, like trees
Decrease in shellfish due to overfishing
Decrease the number of farms
Increase in Earth's temperature
Decrease in number of cars burning gas
Answer:
here you go. I took the test :)
Explanation:
Wht is fluorine more chemically reactive than nitrogen
for many reasons fluorine is mor reactive than nitrogen
1: F is more electronegative atom than N
2: F just needs an electron and N needs 3 electrons to reach noble gases electron configuration
4: F2 bond is weaker than N2 bond
A gas has an initial pressure of 2065 mmHg and temperature of 416 K. What is
the new pressure in atm if the temperature is cooled to 382 K?
Answer:
1896 mmHg
Explanation:
P1/T1 = P2/T2
P1 = 2065 mmHg
T1 = 416 K
P2 = ?
T2 = 382 K
Solve for P2 --> P2 = P1T2/T1
P2 = (2065 mmHg)(382 K) / (416 K) = 1896 mmHg
Please help I have no idea where to start
Answer:
Download Ptable, it will show all of the elements, and you can click on them, and it will show all the information you need about them!
Explanation:
I hope this helps!!!!!
If only one sperm cell is needed to fertilize an egg, why are males capable of producing so many sperm cells?
Question 18 of 20
Which statement explains why a chemical equation must be balanced?
A. It must show how each chemical formula is written to accurately
represent each substance.
B. It must show that coefficients and subscripts can be used in
chemical formulas.
O C. It must show that the mass of each element involved is conserved
by a chemical reaction.
O D. It must show the reactants and products on the correct sides of
the reaction arrow.
SUBMIT
Answer:
d.It must show the reactants and products on the correct sides of
the reaction arrow
Explanation:
hope it helps