Answer:
latent heat of fusion of ice is the amount of heat required to change the state of a body from solid to liquid at a constant temperature .
How many moles do I have of Lithium if I have 116.3g
Answer:
16.85mol
Explanation:
The number of moles of a substance can be calculated by dividing the mass of that substance by its molecular mass. That is;
number of moles (n) = mass (m) /molar mass (MM)
Molar mass of lithium = 6.9g/mol
Hence,
number of moles = 116.3 ÷ 6.9
Moles = 16.85mol
Therefore, 16.85moles is present in 116.3g of Li.
A sample of gas is kept at a temperature of 300 k, a volume of 1.45L, and a pressure of 3.00 kPa. How many moles of has are in the sample
Answer:
the number of moles of the gas is 0.00174 mol.
Explanation:
Given;
temperature of the, T = 300 K
volume of the gas, V = 1.45 L
Pressure of the gas, P = 3.0 kPa
The number of moles of the gas is calculated using Ideal gas equation, as follows;
PV = nRT
Where;
n is number of moles of the gas
R is the ideal gas constant, = 8.315 L.kPa/mol.K
n = PV / RT
n = (3 x 1.45) / (8.315 x 300)
n = 0.00174 mol.
Therefore, the number of moles of the gas is 0.00174 mol.
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 does temperature differ from heat?
Answer:
Heat is a specific spectrum of the temperature scale while temperature is a lot broader
Explanation:
Which of the following is deforestation most likely to cause?
A.
an increase in the amount of soil on Earth
В.
an increase in the amount of minerals on Earth
C.
an increase in the amount of carbon dioxide in Earth's atmosphere
D
an increase in the amount of ozone in Earth's atmosphere
Answer:
C
Explanation:
trees (as well as other plants) produce carbon dioxide. deforestation is the removal of trees. this will not cause an increase in any pollutants such as ozone. ozone is made from VOCs and other harmful pollutants, and not caused by trees. tearing down trees will also not create more soil. So the answer has to be C
A 4.5L container of gas has a pressure of 3.0 atm at a temperature of 100 C. The container is expanded to 6L, and the temperature is increased to 200 C.
A) 2.85 atm
B) 5.3 atm
C) 1.05 atm
D) 100 K
I need help with my science project someone help me answer it!
Answer:
food
Explanation:
how do you balance _KCIO3 + __P4 → _P4010 + ___KCI
Indicate whether each statement is true or false. Drag the appropriate statements to their respective bins. the octet rule is based on the fact that filling in all s and p valence electrons in a shell gives eight electrons. compounds in which nitrogen is the central atom are frequent exceptions to the octet rule because they have too many electrons surrounding the nitrogen. boron compounds are frequent exceptions to the octet rule because they have too few electrons surrounding the boron. the si in sih4 does not follow the octet rule because hydrogen is in an unusual oxidation state.
Answer:
the octet rule is based on the fact that filling in all s and p valence electrons in a shell gives eight electrons--- True
boron compounds are frequent exceptions to the octet rule because they have too few electrons surrounding the boron......True
compounds in which nitrogen is the central atom are frequent exceptions to the octet rule because they have too many electrons surrounding the nitrogen...... false
the si in sih4 does not follow the octet rule because hydrogen is in an unusual oxidation state......false
Explanation:
The octet rule simply means that atoms tend to be stable when they have eight electrons in their outermost shell. This rule mostly applies to the s and p orbitals and not to the d and f orbitals. The sum of the total electrons in the outermost s and p orbitals is often equal to eight for an atom to be considered stable, for example, the noble gases.
Boron often forms compounds which has less than eight electrons around the boron central atom because the compounds of boron often have a sextet of electrons owing to the fact that boron is trivalent and forms mostly covalent compounds.
Nitrogen compounds mostly obey the octet rule and do not have excess electrons. The oxidation state of hydrogen in SiH4 is not unusual.
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:
https://brainly.com/question/25290815
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
Definition:This is a type of lab equipment in which students use probes, interfaces, and software for real-
time data acquisition, display, and analysis with a computer or calculator
What is the term?
why does his apple tastes less sour after 15 days
Answer:
Maybe because that he ate the apple when it wasn't ready or fully grown yet just like bannans if bannanas are green that means that they are still growing so maybe that why it tasted sour or prob because he ate an green apple because thos apples are sour.
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
How many moles of gas is contained in 2.21 L at STP?
Answer:
its an helium gas are contained in a 4.0L at STP? 0.17
Explanation:
because the elements in column 2.21 is what quantity of gas in holes
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
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:
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
DUE IN AN HOUR PLS HELP WILL SEND MONEY THRU CASHAPP
A fire that is burning wood will release water vapor and carbon dioxide
true or false?
Answer:
true.
Explanation:
Read the temp what is it?
17.3 or 17.25??
Answer:
I would say 17.25.
Explanation:
The behavior of an organism is influenced A. only by the organism's life experiences. B. only by the organism's evolutionary history. C. by both the organism's evolutionary history and its life experiences. D. by neither the organism's evolutionary history nor its life experiences.
PLEASE HELP ME ASAP!!!!!!!!!!!!!
CSI blood drop I need help please I don’t find any answers in the episode
How do i calculate speed and find the direction of a moving object
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
How many moles of NaCl are found in 5.2L of a 0.75 M solution?
Answer 4.45 moles
Explanation:
How much did the total amount of discarded clothing and other fabrics increase from 1960
to 2018?
Answer:
Around 17,000,000 or a little more than that
Can you help me please
Answer:
11.5 or 11.52, depending on however many decimal places you round it to
Explanation:
the equation for mass ( using the specific heat capacity equation) is energy transferred divided by temperature change x the specific heat capacity.
so, we do 725 ÷ 32° (the temp change) x 2.03 = 11.52 or 11.5, depending on how many decimal places you round to
i would round to 2 decimal places, so the answer would be 11.52kg.
mass is measured in kg :) hope this helped.
please help me asap. NO LINKS I WILL REPORT YOU!!!!
the galvanometer is not measuring any electricity despite all wires being hooked up. Why could this be?
Answer: you can find out information about Wheatstone bridge.
Explanation: maybe resistors are adjusted such a way that current through
Galvanometer is zero. There is no picture.
Answer:
mmh maybe the connections arent right
Explanation:
coz when u mess up even a bit current wont flow