Answer:
Ver explicacion
Explanation:
Técnicamente, cuando el hielo se derrite, ocupa aproximadamente el mismo volumen de agua que es igual a la masa de agua desplazada antes de que el hielo se derrita. Esto es posible solo cuando se ignora el cambio en la densidad del agua.
Sin embargo, si tenemos en cuenta el ligero cambio en la densidad del agua, se puede demostrar que el volumen de hielo es mayor que el del agua líquida porque el agua se expande cuando se congela.
Esto significa que el volumen de agua disminuye cuando el hielo se derrite.
Are the following equations balanced or unbalanced?
1. SnO2 + 2H2 → Sn + 2 H2O
2. 4NH3 + 5O2 → 4NO + 6H2O
3. 2B2Br6 + 5HNO3 2 B(NO3)3 + HBr
4. 2KNO3 + 1H2CO3 → 1K2CO3 + 2HNO3
write a paragraph on: how Westfield how the rust in their water formed.
Answer:
Students have investigated what's going on in the fictional town of Westfield, they learned that the mysterious reddish-brown substance in the water is actually rust, which formed because of a chemical reaction between the iron pipes and the fertilizer substance in the water.
Explanation:
Iron (III) nitrate (Fe(NO3)3) solution reacts with sodium hydroxide (NaOH) solution to form a
brown precipitate of iron (III) hydroxide (Fe(OH)3). Sodium nitrate (NaNO3) remains in solution as
it is a soluble compound.
Write the word equation and the balanced formula equation for this reaction.
Answer:
Fe(NO3)3 + 3 NaOH ===》Fe(OH)3 + 3 NaNO3
Of the following elements ____ can form a rare +4 ion *
a) Aluminum
b) Lead
c) Krypton
d) Uranium
Answer:
d is the answer.........
how many atoms in 1kg of platinum
a 2.5x10^24
b 3.1x10^24
Answer:
3.1x10^24 it will be in 1 kg of platinum
A 25.0 mL sample of HCI reacted with 20.0 mL of 2.00 M NaOH. What is the molarity of the HCI?
HCl(aq) + NaOH(aq) —> NaCl(aq) + H2O(l)
really need help!
Answer:
Molarity of HCl = 1.6M
Explanation:
The chemical reaction equation is;
HCl(aq) + NaOH(aq) —> NaCl(aq) + H2O(l)
Now, molarity = number of moles/volume
Thus, for NaOH, we have;
Number of moles = molarity × volume = 2M × (20/1000) L
Number of moles = 0.04 moles
Using the coefficients in the chemical equation above, we can find the corresponding number of moles for HCl.
Number of moles of HCl = 0.04 moles NaOH × (1 mole of HCl/1 mole of HCl) = 0.04 moles of HCl
Thus;
Molarity of HCl = 0.04/(25/1000)
Molarity of HCl = 1.6M
what are the Common compounds of niobium in which it is found
(include common names and their chemical formulas)
plssss help
Explanation:
Common Compounds of Niobium Nb
[Nb+3, Nb+5]
Compound NameFormulaMolar Mass
Niobium(III) OxideNb2O3233.811
Niobium(III) SulfateNb2(SO4)3474.0006
Niobium(V) PhosphateNb3(PO4)5753.576
Niobium(V) BromideNbBr5492.4264
Niobium(V) PentoxideNb2O5265.8098
Niobium OxychlorideNbOCl3215.2648
Niobium(V) IodideNbI5727.4287
Niobium(V) PentachlorideNbCl5270.1714
Niobium(V) ThiocyanateNb(SCN)5383.3184
Niobium(III) ChlorideNbCl3199.2654
Niobium(V) Dihydrogen PhosphateNb(H2PO4)5577.84259
Niobium NitrideNbN106.9131
Niobium(III) DichromateNb2(Cr2O7)3833.77676
Niobium HydroxideNb(OH)3143.9284
Niobium(V) PerchlorateNb(ClO4)5590.15938
Niobium(V) HypochloriteNb(ClO)5350.16838
Niobium(III) HypochloriteNb(ClO)3247.26358
Niobium(V) CarbonateNb2(CO3)5485.85726
Niobium(III) TartrateNb2(C4H4O6)3630.02564
Niobium(III) ChromateNb2(CrO4)3533.79386
Niobium(V) HexafluorosilicateNb2(SiF6)5896.192356
pick one answer please do not put any links just type the answer
Use words from the box to complete the sentences.
fungi pathogen poison vaccine virus
(a) A bacteria that can cause a disease is an example of a..................................
(b) An obligate parasite that must inhabit a host cell to reproduce is a ...................................
Answer:
a) pathogen
b) virus
Explanation:
pathogens are harmful bacteria
viruses depend on the host to survive
The mass of 0.10 mole of methane
Answer:
A methane molecule is made from one carbon atom and four hydrogen atoms. Carbon has a mass of 12.011 u and hydrogen has a mass of 1.008 u. This means that the mass of one methane molecule is 12.011 u + (4 × 1.008u), or 16.043 u. This means that one mole of methane has a mass of 16.043 grams.
メタン分子は、1つの炭素原子と4つの水素原子から作られています。炭素の質量は12.011uで、水素の質量は1.008uです。これは、1つのメタン分子の質量が12.011 u +（4×1.008u）、つまり16.043uであることを意味します。これは、1モルのメタンの質量が16.043グラムであることを意味します。^>^
The mass of 0.10 mole of methane (CH4) is 1.6grams.
HOW TO CALCULATE MASS?The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass. That is;
mass = moles × molar mass
According to this question, there are 0.10 mole in methane (CH4). The molar mass of CH4 is 16g/mol.
Mass of CH4 = 0.10 × 16
Mass of methane = 1.6grams.
Therefore, the mass of 0.10 mole of methane (CH4) is 1.6grams.
Learn more about mass at: https://brainly.com/question/19694949
ANSWER ASAP Please! How do groups and periods differ? What trend specifically occurs in either?
A 1.26 g sample of He gas has a pressure of 0.123 arm and a volume of 32.6 L. What is the temperature of the sample, in degrees Celsius
A 1.26 g sample of He gas has a pressure of 0.123 arm and a volume of 32.6 L, then the temperature of the gas is -117.7 degree C.
How do we calculate the temperature of gas?Temperature of any gas will be calculated by using the ideal gas equation as:
PV = nRT, where
P = pressure of gas = 0.123 atm
V = volume of gas = 32.6 L
R = universal gas constant = 0.082 L.atm / K.mol
T = temperature of gas = ?
n is moles of He gas and will be calculated as:
n = W/M, where
W = given mass = 1.26g
M = molar mass = 4 g/mol
n = 1.26 / 4 = 0.315 moles
On putting values we get,
T = (0.123)(32.6) / (0.315)(0.082)
T = 155.41 K = 155.41 - 273.15 = -117.7 degree C
Hence required temperature of the helium sample is -117.7 degree C.
To know more about ideal gas equation, visit the below link:
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9. In a laboratory experiment, two groups of rats are fed two different fatty acids as their sole source of carbon for a month. The first group gets heptanoic acid (7:0), and the second gets octanoic acid (8:0). After the experiment, a striking difference is seen between the two groups. Those in the first group are healthy and have gained weight, whereas those in the second group are weak and have lost weight as a result of losing muscle mass. What is the biochemical basis for this difference
Answer:
Beta oxidation of the odd chain heptanoic acid will produce propionyl CoA, which can be converted in several steps to oxaloacetate. Oxaloacetate is the starting material for the process of gluconeogenesis (producing glucose from noncarbohydrate precursors). This gives extra glucose to the first group, so they will be healthier and gain weight. Beta oxidation of the even chain will entirely be oxidized to acetyl Co-A (one of the precursors of the TCA cycle). This will lead to a large excess of ketone bodies instead of glucose for energy, which will lead to the second group being weak and losing weight.
Explanation:
The difference is seen in having an odd chain and an even chain of fatty acids and how they are broken down and used in the body.
The boiling temperature of water is directly related to the atmospheric pressure. At sea level, the atmospheric pressure is 760 torr whereas the boiling temperature is 100equationC. If the atmospheric pressure is lower than 760 torr, then the boiling temperature will be less than 100equationC. If the atmospheric pressure is higher than 760 torr, then you would expect the boiling temperature to be higher than 100equationC. At higher elevations, the atmospheric pressure is lower resulting in a lower boiling temperature. For example: Denver, CO experiences a boiling temperature at ~ 94equationC. If you were conducting an experiment that involved boiling water, what would you expect the boiling temperature to be if the atmospheric pressure was 790 torr
Answer:
If the atmospheric pressure is lower than 760 torr, then the boiling temperature will be less than 100equationC.
B. 97.7°C
Explanation:
The question mentions the fact that temperature and pressure are directly proportional. This means that if one quantity is increasing the other increases simultaneously and vice versa.
Hence, if the atmospheric pressure is lower than 760 torr, then the boiling temperature will be less than 100equationC.
From;
PαT
P=kT
Hence
P/T = k
P1/T1 = P2/T2
P1T2 = P2T1
P1 = 760 torr
T1 = 94°C
T2 = ?
P2 = 790 torr
T2 = P2T1/P1
T2 = 790 * 94/760
T2 = 97.7°C
can someone pleaze help me
Answer:
I think its the last one
Explanation:
Super sorry if its incorrect.
A very small electronegativity difference leads to a:
a Polar covalent bond
b Non-polar covalent bond
c lonic bond
d None of the above
How many moles of CO2 are in 54.3 g of CO2 ?
Answer:
There is actually 1 mole in 54.3 g of CO2
DUE IN AN HOUR PLS HELP WILL SEND MONEY THRU CASHAPP
What will happen to the Sun in approximately 5.5 billion years?
Answer:
This lifespan began roughly 4.6 billion years ago, and will continue for about another 4.5 – 5.5 billion years, when it will deplete its supply of hydrogen, helium, and collapse into a white dwarf.
Explanation:
Got this from the internet lol
If we have 0.072 g of FeCl3 then how many moles are there?
Answer:
~0.0004
Explanation:
[tex]n=\frac{m}{M}[/tex]
n=0.072/(56+(35.5*3))=0.072/162.5~~0.004
Student Force
40 N
Student Force
80N
What is the net force in newtons (N)?
What is the direction of the motion? no motion
2
Answer:
net force is 80n ‐40n=40newton
the direction of motion is right
How do i calculate speed and find the direction of a moving object
How does temperature differ from heat?
Answer:
Heat is a specific spectrum of the temperature scale while temperature is a lot broader
Explanation:
Why would you rather have hot cocoa than lemonade on a cold day? (The lesson is called heat transfer)
Answer:
you would more than likely have hot coca.
Explanation:
Because when its cold out you don't want something cold, its common sense lol.
Write the complete balanced equation for Manganese & sulfuric acid --> Manganese (II) sulfate & water & sulfur dioxide
no spaces
no subscripts
no 1's for coefficients
WILL GIVE BRAINLIEST!
Answer:
I kinda forgot. I'm sorry if I didn't answer your question.
Explanation:
How many grams is 2.393 x 10^24 atoms of O?
70.45 g O
140.9 g O
63.58 mole O
63.58 g O
Answer:
63.58 g O
Explanation:
To calculate the mass of O atoms, the number of moles of O atoms are needed and can be calculated as follows:
n (no. of moles) = nA ÷ 6.02 × 10^23
n = 2.393 x 10^24 ÷ 6.02 × 10^23
n = 0.398 × 10^ (24-23)
n = 0.398 × 10^1
n = 3.98moles.
To calculate the mass of Oxygen, we use the following formula:
moles = mass/molar mass
Molar mass of O = 16.
3.98 = m/16
m = 3.98 × 16
m = 63.68grams of Oxygen.
Answer:
Solution given:
[tex]1 mole \:of O=6.023×10^{23} atoms[/tex]
1 mole of O =16g
we have
[tex] 6.023×10^{23} atoms\: of O=16g[/tex]
now
[tex] 2.393 × 10^{24} atoms\: of \:O\\=16/6.023×10^{23}*2.393 x 10^{24}g\\=63.57g[/tex]
63.57g is a required mass of O.
What is the volume of a balloon that contains 3.7 moles of helium at 75°C
and 5.1 atm?
Answer: your question is easy 21 L
By using ideal gas law the amount of volume will be 21 L.
What is ideal gas law?
The general gas equation, commonly known as the ideal gas law, is the state equation of a hypothetical ideal gas.
Calculation of volume by using ideal gas law.
Given data:
P = 5.1 atm
n = 3.7 moles
T = 75°C (273 + 75) = 348 K
V = ?
Put the given data in ideal gas law.
PV = nRT
V = nRT / P
V = 3.7 × 8.31 × 348 / 5.1
V = 2098
V = 21 L
Therefore, By using ideal gas law the amount of volume will be 21 L.
To know more about ideal gas law.
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Which pieces of equipment are
needed to calculate the velocity of a
falling object?
A stopwatch and balance
B speedometer and magnet
C compass and tape measure
D tape measure and stopwatch
Question is in picture
Answer:
30
Explanation:
I believe it's 30 because half of 24 is 12 and that is its half life. And as you know it took 30 minutes to get there.
what is the formula for water
Answer:
H2O
Explanation:
EASIEST FORMULA ON EARTH