The number of moles of carbon in a sample of C4H10 that also contains 200 g of hydrogen is 80 moles.
How to calculate number of moles?The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.
According to this question, a sample of C4H10 was given meaning that the ratio of carbon to hydrogen is 4:10.
If 200 g of hydrogen is contained in the sample, then 200 × 4/10 = 80g of carbon is present.
no of moles of C = 80
Therefore, the number of moles of carbon in a sample of C4H10 that also contains 200 g of hydrogen is 80 moles.
Learn more about number of moles at: https://brainly.com/question/14919968
#SPJ1
what are chemistry products
Answer:
Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.
Explanation:
hope this helps if not let me know have a great day
Indicate whether solutions of the following salts would be acidic, basic, or pH-neutral.
a. NaNO3
b. Ba(C2H3O2)2
C. CH3NH3Cl
4. C6H5NH3CHO2
e. CoBr3
Answer is NH4NO3
YOU HAVE WRITTEN WRONG IN OPTION NO. A
EXPLANATION
Milk in a bottle has a mass of 442grams and a volume of 425cubic centimeters. Calculate its density. Write your answer to the hundredths place. gramspercubic centimeter
Answer:1.04 grams per cubic centimeter
Explanation:
emitted helium nucleus
what force of attraction holds ionic compounds together
Answer:
electrostatic force
Explanation:
(d) Explain the trend in the boiling points in the table above.
Answer:
The BP increases in temperature as you move down the halogen group ( group 7)
Answer:
The trend of boiling points in the the table vary according to the size of the elements atom, if an element has a larger size it will need greater intermolecular forces and heat to break the strong bonds. Therefore Bromine has a larger size followed by chlorine and later fluorine, and this has shown in their boiling points
How many covalent bonds must each carbon atom have around it in an organic or biochemical molecule? 1 2 3 4
Answer:
4 covalent bonds
Explanation:
Each carbon atom can form as many as four covalent bonds with other carbon atoms as well as with other elements. Be able to explain why this is so. Be able to list the four main groups of organic molecules and their functions in living things.
50 POINTS PLEASE ANSWER QUICK (bad answers will be reported)
Donna is studying phase changes. She claims that since the three phases have different amounts of energy, molecules in substances gain or lose energy only during phase transitions. What is incorrect about this claim?
Molecules gain or lose energy during any temperature change, not just phase changes.
Molecules do not have any energy changes, because they have a set amount of energy all the time.
Molecules are constantly losing energy, no matter what phase change is happening.
Energy levels are not related to phase changes.
Answer: Molecules gain or lose energy during any temperature change, not just phase changes.
Explanation:
If you think of a heating or cooling curve, even when there isn't a phase change, the kinetic energy of the particles is still changing.
104 Equilibrium Constant 2
The toxic gas phosgene decomposes to a limited extent to carbon monoxide and chlorine at a certain temperature T K
according to the following equation:
COCI₂(g) CO(g) + Cl₂(g)
The equilibrium constant, Kc, is 0.00045 at this temperature.
What is the equilibrium constant for the reverse reaction?
Give your answer with 2 significant figures in the exponential form, for example, 1.5e3 for 1500.
From the calculations, the equilibrium constant of the reverse reaction is 2.22 * 10^3.
What is equilibrium constant?The term equilibrium constant refers to a number that shows the extent to which reactants are converted into products.
We can see that the equation is COCI₂(g) CO(g) + Cl₂(g) having Kc = 0.00045. The equilibrium constant of the reverse reaction is; 1/0.00045 = 2.22 * 10^3.
Learn more about equilibrium constant:https://brainly.com/question/10038290
#SPJ1
Explain how friction is involved in energy transformation.
Answer:
Friction also prevents an object from starting to move, such as a shoe placed on a ramp. When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.
Friction is involved in energy transformation considering the fact that When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.
Friction also prevents an object from starting to move, such as a shoe placed on a ramp.
In other words, opposing force is known as friction. The type of friction that acts on an object that is not moving is static friction.
Static friction serves as a kind of friction that do occur between two object that are not moving which means the object are static in nature.
Thats why during rainy season while walking on slippery roads people wear shoes with spikes which prevents a person from slipping into mud by the action of friction.
To know more about friction here
https://brainly.com/question/28356847
#SPJ2
How many grams of Copper are in 500grams of Cu2CO3?
Answer:
≈170.22 [gr].
Explanation:
1) M(Cu₂CO₃)=2*64+12+3*16=188 [gr/mol];
2) the part of copper in Cu₂CO₃ is:
[tex]\frac{64}{188} =\frac{16}{47};[/tex]
3) 16/47% of 500 [gr] is:
[tex]500*\frac{16}{47}=170.22[gr].[/tex]
What is the repeating unit in this polymer? −CH2−CCl2−CH2−CCl2−CH2−CCl2−
The repeating unit in this polymer is −CH2−CCl2 (i.e., Methylene-Dichlorocarbene).
What is a polymer?In chemistry, a polymer is a molecule and/or structure composed of two or more repeating units.
These repeating units can be very reactive in a single composition or form a polymer when bound.
In conclusion, the repeating unit in this polymer is −CH2−CCl2 (i.e., Methylene-Dichlorocarbene).
Learn more about polymers here:
https://brainly.com/question/766968
#SPJ1
How old is a piece of cotton cloth if the half-life of carbon-14 is 5,730 years, and the carbon-14 composition of the cloth is 22 percent that of living plants?
Question 1 options:
A)
1,813 years
B)
1.21 × 10-4 years
C)
12,517 years
D)
1.21 × 10-4 years-1
The half-life is the time used by the concentration to get half of its initial value. The cotton cloth is 5097 years old.
What is radioactive decay?Radioactive decay is the reduction of the initial concentration to the half value. The exponential decay can be given as:
[tex]\rm N(t) = N_{0}e ^{-\lamda t}[/tex]
The decay constant is calculated as:
[tex]\begin{aligned} \lamda &= \rm \dfrac {ln (2)}{t\frac{1}{2}}\\\\&= \dfrac{\rm ln(2)} {5730}\\\\&= 0.0001209\end{aligned}[/tex]
Solving further:
[tex]\begin{aligned}0.22 &= \rm e^{-0.0001209 \times t}\\\\\rm ln 0.22 &= -0.0001209 \times t\\\\\rm t &= \rm \dfrac{log 0.22}{-0.0001209}\\\\&= 5097 \;\rm years\end{aligned}[/tex]
Therefore, the cotton cloth is 5097 years.
Learn more about decay here:
https://brainly.com/question/16254926
#SPJ1
The results of the gold foil experiment led to the conclusion that an atom is
[tex]\sf\large \blue{\underbrace{\red{Answer⋆}}}:[/tex]
The nucleus of an atom of the element is positively charged and atom has a hollow space inside it.
Explanation:
This experiment was conducted by Rutherford in this experiment. He placed a gold foil and surround it with a screen.
And He exposed gold foil in alpha particles rays in which he noticed that most rays passed through atom which conclude that atom has a large space, some rays get deflected and some reverse their path this show that the positive charge of nucleus of an atom.
How much heat is released when 60.0 G of steam at 235°C is converted to water at 100°C?
Answer:12668 J.
Explanation:
First of all, steam is there so in order to convert it into water it must have to release latent heat of vaporization which is equal to approximately 2450 kJ/kg or 2450 J/g.
So, the calculation is given below.
Heat released during conversion of steam at 100°C to water at 100°C= m*L
= 5*2450= 12250 J.
Heat released during conversion of water at 100°C to water at 80°C= m*Cp*(∆T)
= 5*4.18*20= 418 J.
So total heat released= 12668 J.
hope this helps:)!!!
The heat energy released or absorbed by a system can be calculated using calorimetric equation. The heat is released when 60.0 g of steam at 235°C is converted to water at 100°C is 33858 J or 338 KJ.
What is calorimetry?Calorimetry is an analytical tool used to determine the heat energy q absorbed or released in a reaction system. The calorimetric equation connecting mass of the reactant m, specific heat capacity c and temperature difference ΔT is related by the expression:
q = mcΔT.
The mass of steam is given 60 g and temperature difference is from 235 to 100 °C thus 135 °C and the specific heat capacity of water or steam is 4.18 J/°C. The heat energy released is calculated as follows:
q = 60 g × 4.18 J/°C × 135 °C
= 33858 J
Hence, heat is released when 60.0 g of steam at 235°C is converted to water at 100°C is 33585 J.
To refer more on calorimetry, refer the link:
https://brainly.com/question/11477213
#SPJ2
What type of reaction is the following?
H₂O ---> H₂ + O
[tex] \boxed{ \frak{Answer }}[/tex]
It's decomposition reaction.
[tex] \sf{Explanation}[/tex]
In decomposition reaction, a compound breaks into simpler form on heating.As, we can see in the above reaction, [tex] H_{2} O[/tex] is broken down into [tex] H_{2} [/tex] and [tex] O_{2} [/tex].
Hence it is a decomposition reaction.[tex] \boxed{ \frak{Be \: Brainly}}[/tex]
[tex] \boxed{ \frak{Keep \: Learning}}[/tex]
Nitroglycerine (C3H5(NO3)) is a powerful explosive. The products of this reaction are
elemental oxygen, elemental nitrogen, water, and carbon dioxide. The Gibbs free energy for this
reaction is negative at 273 K. Determine whether the reaction is spontaneous.
The Gibbs free energy describes the spontaneity of the chemical reaction. The reaction involving nitroglycerine is spontaneous.
What is spontaneity?Spontaneity is the condition of the reaction that continuously makes the product without adding input energy again and again. It is determined by the Gibbs free energy of the system.
When the Gibbs free energy of the thermodynamic system is negative then the reaction is said to be exothermic and is a spontaneous reaction. The negative Gibbs free energy of nitroglycerine at 273 K shows spontaneity.
Therefore, the reaction is spontaneous.
Learn more about spontaneity here:
https://brainly.com/question/27619084
#SPJ1
Why do a human and monkey look different? the location of the DNA in a cell the type of cells the organization of cell structures the DNA sequence
Answer:
DNA sequence
Explanation:
When we say our DNA is different , we mean the sequence, or coding, of DNA is different
What changes in color occur when bromine reacts with an alkene?
This is an impossible formula. If it were real, determine the molar mass of:
Cr4(PO4)3
Answer:
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
Explanation:
First, collect the individual molar masses of each element. These values are found on the periodic table under each respective element.
Chromium (Cr): 51.996 g/mol
Phosphorus (P): 30.974 g/mol
Oxygen (O): 15.999 g/mol
The quantity of each element is determined by the subscript next to it. If their is a subscript directly to the right of a set of parentheses, multiply each element within the parentheses by the subscript.
Chromium (Cr): 4
Phosphorus (P): 1 x 3 = 3
Oxygen (O): 4 x 3 = 12
Finally, the total molar mass of the compound is the collective molar masses of each element times the quantity of each element.
Molar Mass (Cr₄(PO₄)₃): 4(51.996 g/mol) + 3(30.974 g/mol) + 12(15.999 g/mol)
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
Thermal energy is another name for–
A. sound energy
B. light energy
C. heat energy
D. mechanical energy.
Explanation:
heat energy is another name for thermal energy
Calculate the mass (in grams) of 3.85 x 1024 carbon atoms.
Round your answer to two decimal places.
Answer:
You can get to the answer in two steps:
calculate: 3.40⋅1022 atoms = x mol ?
using Avogadro's constant.
calculate: x mol = ? grams,
using the atomic mass of Helium.
Step 1
Avogadro's constant says that 1 mole of any atom contains 6.022⋅1023 atoms. In this case you have 3.40⋅1022 atoms:
3.40⋅1022atoms6.022⋅1023atomsmol = 5.65⋅10−2mol
Step 2
The atomic mass of helium (He) will give you the weight of one mole of this molecule: 1 mol = 4.00 gram:
4.00gmol⋅5.65⋅10−2mol = 0.226g
So the 3.40⋅1022 helium atoms weigh 0.226 gram.
A sample of air is held in a 722 ml. container at 23.3°C. This sample is transferred into a 481 mL container
with a measured pressure of 2.055 atm and a stable temperature of 80.1. What was the initial pressure
in the first container (in atm)?
01.38
0.978
01.24
O 1.15
Apply combine gas law
T1=296.3KT2=353KSo
[tex]\\ \rm\Rrightarrow \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{P1(0.722)}{296.3}=\dfrac{0.481(2.055)}{353}[/tex]
[tex]\\ \rm\Rrightarrow 0.0024P1=0.0028[/tex]
[tex]\\ \rm\Rrightarrow P_1=1.167atm[/tex]
D
On a warm, pleasant day, you notice some clouds in the sky. The clouds are very high up in the sky and look quite thin.
tell me Which type of clouds are in the sky?
cirrus
cumulus
stratus
fog
Answer:
their citrus clouds
Explanation:
I looked it up on the internet
What is the IUPAC name of the compound N2O?
Answer:
Nitrous Oxide
Explanation:
How do hydrogen ions exist in a solution?
What is the engine piston displacement in liters of an engine who’s displacement is listed as 430 in.²
For an engine whose displacement is listed as 430 in.², the engine piston displacement in liters is mathematically given as
PD= 7.37 L
What is the engine piston displacement in liters of an engine whose displacement is listed as 430 in.²?
Generally, the equation for the dimensional analysis method,\, we convert in to L is mathematically given as
l*(v/l)*l/v
Therefore, piston displacement
PD=(450 in3) . (1 dm3 / 61.024 in3) . (1 L / 1 dm3)
PD= 7.37 L
In conclusion, piston displacement
PD= 7.37 L
Read more about volume
https://brainly.com/question/1578538
#SPJ1
Calculating the Equilibrium Solubility Constant
A specific metal ion, M²+, forms a relatively insoluble sulfide compound, MS, which dissolves to a very limited extent.
MS(s) = M²+ (aq) + S²-(aq)
The concentration of ions in a saturated solution was found:
[M²+ (aq)] = [S2-(aq)] = 0.000143 mol L-¹.
Calculate Ksp for the compound MS.
Give three significant figures.
Enter your answer in exponential form, for example, enter 0.000000672 as 6.72e-7 with no gaps and the -ve e if power
is -ve.
The solubility product of the substance MS in water is 2.0 * 10^-8.
What is solubility product?The solubility product is an equilibrium constant that shows the extent to which a solid is dissolved in water.
In this case, the equilibrium is; MS(s) = M²+ (aq) + S²-(aq) but M²+ (aq)] = S^2-(aq)] = 0.000143 mol L-¹.
Thus
Ksp = [0.000143 ]^2 = 2.0 * 10^-8
Learn more about Ksp:https://brainly.com/question/27132799?
#SPJ1
What is the concentration expressed in parts per million of a solution containing 20.0 grams of C6H12O6 in 80.0 grams of H2O?
A) 2.50 × 10^5 ppm
B) 2.00 × 10^5 ppm
C) 4.00 × 10^6 ppm
D) 5.00 × 10^6 ppm
Answer:
B is the answer. 2.00 x 10^5 ppm
Explanation:
Right on edmentum
The pressure of a sample of 226 cm3 of methane is doubled. What is the new volume of the gas? Assume that the temperature stays constant
The new volume of the methane gas would be 113 atm
What is Boyle's law?At constant temperature, the pressure of a gas is inversely proportional to its volume.
Mathematically; P1V1 = P2V2 where P1 = initial pressure, P2 = final pressure, V1 = initial temperature, and V2 - final temperature.
In this case, V1 = 226 [tex]cm^3[/tex], P2 = 2P1
Thus: V2 = P1V1/2P1 = V1/2 = 226/2 = 113 atm
More on Boyle's law can be found here: https://brainly.com/question/1437490
#SPJ1
