Answer:
a
Explanation:
a) Balance the equation below.
Hg(ONC)2 -----------> Hg + N2 + CO
b.) After decomposition, if you are left with 50.2g of CO, how many grams of mercury fulminate did you start with? (Hint: This problem asks about how many grams of reactant we start with, you can do the problem the same way as if CO was the reactant and Hg(ONC)2 was the product.)
Answer:
254.7 g
Explanation:
Hg(ONC)2 -----------> Hg + N2 + 2CO
In every problem of stoichiometry, we must commence with writing the balanced reaction equation as a guide to our calculation. Once we have written the reaction equation, we can now proceed with the solution.
Amount of CO produced= mass of CO produced/ molar mass of CO
Molar mass of CO = 28 gmol-1
Mass of CO produced= 50.2g
Amount of CO produced= 50.2g/28gmol-1
Amount of CO produced= 1.79 moles of CO
From the reaction equation:
1 mole of Hg(ONC)2 produced 2 moles of CO
x moles of Hg(ONC)2 will produce 1.79 moles of CO
x= 1.79 × 1 / 2
x= 0.895 moles of Hg(ONC)2
Molar mass of Hg(ONC)2 = 284.624 g/mol
Mass of Hg(ONC)2 = number of moles × molar mass = 0.895 moles × 284.624 g/mol
Mass of Hg(ONC)2 = 254.7 g
calculate the density of a solid that has a volume of 2cm3 and a mass of 3g
Answer:
The density is 6
Explanation:
p = m × v
p = 3 × 2
p = 6
Hope this helped! :)
The density of the substance depends on the mass and the volume of the substance or object. It is given by the ratio of mass and volume. The density of 3 gm solid is 1.5 g/cm³.
What is density?In chemistry and physics, density is a quantitative measurement that tells about the tightness of the substance packed in an area. It relates to two parameters that include mass and volume.
The density can be said to have a proportion of mass to the volume of the substance. The mass can be in grams or kilograms, while volume can be in a liter, cubic meter, and cubic centimeter.
Given,
Mass of solid (M) = 3 gm
The volume of solid (V) = 2 cm³
Density (ρ) is calculated as:
ρ = M ÷ V
= 3 ÷ 2
= 1.5 gm/cm³
Therefore, 1.5 gm/cm³ is the density of 3 gm solid.
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How do I solve this? Please help.
How much heat is required to raise the temperature of 179g of acetic acid, CH3COOH, from 250C to 82.70C?
Answer: The heat required to raise the temperature of 179 g of acetic acid, is 21000 Joules
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
[tex]Q=m\times c\times \Delta T[/tex]
Q = Heat absorbed = ?
m = mass of acetic acid = 179 g
c = heat capacity of acetic acid = [tex]2.043J/g^0C[/tex]
Initial temperature = [tex]T_i[/tex] = [tex]25^0C[/tex]
Final temperature = [tex]T_f[/tex] = [tex]82.7^0C[/tex]
Change in temperature ,[tex]\Delta T=T_f-T_i=(82.7-25)^0C=57.7^0C[/tex]
Putting in the values, we get:
[tex]Q=179g\times 2.043J/g^0C\times 57.7^0C=21100J[/tex]
Thus heat required to raise the temperature of 179 g of acetic acid, is 21000 Joules
1. Why is hot air hot?
Answer:
Explanation:
Radiation from the sun heats the ground, then the ground heats the air by process of conduction. When that happens air temp. and density start to change causing air convection currents. Hope I help.
Which of the following did Antoine Lavoisier correctly characterize as an element? light silicone dioxide mercury
Answer: mercury
Explanation: I looked up the answer to your question.
Answer:
Mercury
Explanation:
I did this question and I got it right.
Why is 4,4dimethyl hexane name is wrong
Answer:
3,3-dimethyl hexane
Explanation:
CH3
I I I I I I
- C - C - C - C - C - C-
I I I I I I
CH3
what is the diffrence between displacement ans double displacement reactions write equations for these reactions
Answer:
Single Displacement reaction
In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
Change in colour takes place with no precipitate forms.
Metals react with the salt solution of another metal.
Examples:
2KI + Cl2 → 2KCl + I2
CuSO4 + Zn → ZnSO4 + Cu
Double displacement reaction
In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.
Precipitate is formed.
Salt solutions of two different metals react with each other.
Examples:
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
2KBr + BaCl2 → 2KCl + BaBr2
Hope this helps...Please Mark as Brainliest!!
A neutralization reaction has what two reactants?
A — acid and base
B —- hydrocarbon and water
C— acid and salt
D—hydrocarbon and base
Answer:
it's a, acid and base
Explanation:
a neutralization reaction occurs between strong acids and strong bases and result in the formation of a salt and water
When will the simping end
Answer:
Nvr XD
Explanation:
Answer:
the world may never know
Explanation:
Describe the benefits of using nanoparticles instead of other, larger technology.
Answer:
it has a huge surface-to-volume ratio, very high porosity and completely different physiochemical properties.
Explanation:
idk if the answer is good !
sorry
The pressure of a gas in a cylinder when it is heated to a temperature of 250k is 1.5 atm. What was the initial temperature of the gas if it’s initial pressure was 1 atm?
Answer:
[tex]T1=166.66K[/tex]
Explanation:
According to Gay-Lussac’s law simply states that the ratio of the initial pressure and temperature is equal to the ratio of the final pressure and temperature for a gas of a fixed provided that the mass is kept at a constant volume.
Given:
Initial pressure, P1 = 1 atm
Final pressure, P2 = 1.5 atm
Final temperature, T2 = 250 K
The law can be applied using the below formula
P1T2 = P2T1
Then,
T1 = (P1T2)/P1 = (1*250)/(1.5) = 166.66 Kelvin.
[tex]T1=166.66K[/tex]
:
Answer:
[tex]T_1=166.7K[/tex]
Explanation:
Hello,
In this case, by applying the Gay-Lussac's law which help us to understand the pressure-temperature gas behavior via a directly proportional relationship:
[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2}[/tex]
In such a way, as we are asked to compute the initial temperature knowing the initial pressure and final both temperature and pressure, so we solve for it:
[tex]T_1=\frac{T_2P_1}{P_2}=\frac{250K*1atm}{1.5atm} \\\\T_1=166.7K[/tex]
Best regards.
A 0.80 L sample of gas has a temperature of 27°C and a pressure of 0.925 atm. How many moles of gas are present?
Answer:
n= 0.03 moles
Explanation:
Using the ideal gas law:
PV=nRT
nRT=PV
n= PV/RT
n: moles
P: pressure in atm
V= volume in L
R= Avogadro's constant = 0.0821
T= Temperature in K => ºC+273.15
n= (0.925 atm)(0.80 L) / (0.0821)(300.15 K)
n= 0.03 moles
* I’ll give you brainlist* The skeletal system has many functions. Which of the following body functions does the skeletal system NOT do?
Answer:
A) remove germs from the blood
Explanation:
cause the rest are the skeletal system function
Answer:
The skeletal system does not remove germs from the blood
Explanation:
I learned that from my teacher
if 203 mL of water is added to 5.00 mL of 4.16 M KCl solution, what is the concentration of the dilute solution
Answer:0.100
Explanation:
What is similar about igneous rock and metamorphic rock formation?
Answer:
I think they both need heat.
Explanation:
In the water cycle diagram above, which letter represents
groundwater?
Select One:
Q
S
T
R
Answer:t
Explanation:bc
AgCl is..
A)an element
B)a compound
C.)a mixture
Answer:
(B)
Explanation:
Silver chloride is a simple ionic compound consisting of the silver cation (Ag+) and chloride anion (Cl-).
Many grasses and few trees characterize ____________ (tundras/temperate grasslands).
What mass in grams of hydrogen is produced by the reaction of 2.0 g of magnesium? (Make sure to balance the reaction first)
Mg(s) + H2O(1) --> Mg(OH)2(s) + H2 (8)
Answer:
0.164541341 g H2
Explanation:
1) Convert grams to moles by dividing by RMM of Magnesium (24.31g).
2g Mg * (1 mol Mg / 24.31 g Mg) = 0.082270671 mol of Mg
2) Use the balanced equation's ratio of 1 mol Mg: 1 mol H2.
0.082270671 mol of Mg = 0.082270671 mol of H2
3) Convert the mol of H2 back into grams by multiplying by H2's RMM (2 g).
0.082270671 mol of H2 * 2 g H2 = 0.164541341 g H2
* Answer can be rounded to your liking *
Analysis: The limiting reactant(s) appeared to be
because
there is nothing with which it can react
Explanation:
The limiting reactant(s) prevents a reaction from continuing because there is none left.
Why do limiting reactants occur?Identification of the limiting reactant makes it possible to calculate the theoretical yield of a reaction. The reason there is a limiting reactant is that elements and compounds react according to the mole ratio between them in a balanced chemical equation.
How do you get the limiting reactant?The reactant that is consumed first and limits the amount of product(s) that can be obtained is the limiting reactant. To identify the limiting reactant, calculate the number of moles of each reactant present and compare this ratio to the mole ratio of the reactants in the balanced chemical equation.
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help me name the molecule
Answer:
ether
Explanation:
ether is -OR
- Hope that helps! Please let me know if you need further explanation.
what is whether? what is climate? Does todays weather impact climate?
Answer:
Weather is the state in which a certain part inside the atmosphere is hot or cold.Climate is the usual weather in a certain place in the world or atmosphere.One way weather can affect climate is global warming,which is when the world gets hotter and the ice in the world melts and water rises.
Explanation:
climate can be defined as the long-term weather.
Help please! I don’t know what subject to pick this is science tho!!!!!!!!!!!!!!!
Answer:
C.
Explanation:
Because it decreases from October trough december
HELP CHEM ASAP PLZZZ!!!! Brainlist
Answer:
True.
Explanation:
The higher the 'Mol Concentration', the stronger the acid or base the substance is. For example...
1 Mol of HCl is less concentrated than 6 Mol HCl.
This is the same with bases:
1 Mol of NaOH is less concentrated than 6 Mol NaOH.
Why does the addition of a solute lower the freezing point of a solution?
A The solute is colder than the solvent.
B The solute disrupts crystal formation by the solvent.
C The solute tends to sink to the bottom of the solution.
D The solute has bigger molecules than the solvent.
Answer:
B
Explanation:
.
A pure gas that is 14.3% hydrogen and 85,7% carbon by mass has a density of 2.5 g L-' at 0°C and 1 atm
pressure. What is the molecular formula of the gas
Answer:
C
Explanation:
4× CH2 = C4H8
Which of the following contains polyatomic ion?
Oa
BeHCO
Ob
PCI
Ag!
Mgs
In the following reaction 6.13g of water (H,O) is produced the theoretical
yield of water (H,O) is 8.17g, what is the percent yield of water?*
C3H8+ 5 O2 → 3 CO2 + 4 H2O
85.0%
72.0%
75.0%
0 67.0%
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns? Select one: A new substance is produced. Coal is made up of more than one element The shape of the coal changes. Oxygen is present.
Answer:
a new substance is produced
Explanation:
i just took my test and got this question right
The best evidence that a chemical reaction occurs when coal burns is a new substance is produced. The correct option is A.
What is coal?Coal is a carbon containing fossil fuel, which is formed when the organic matter is decomposed inside the earth with heat and pressure by the earth crust. It is the most used fossil fuel.
Carbon dioxide is a gas produce when these fossils fuel burned. It is a green house gas and increase the warmth of the earth when produced. It is taken by plants to make their food.
When coal burns, it produces carbon dioxide which is a gas and coal is a solid, so here the chemical reaction is happening which is producing a new substance.
Thus, the correct option is A. A new substance is produced.
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Is it illegal for fracking companies to let water that has been used for fracking deep back into the ground ?
Answer:
It is illegal
Explanation:
Fracking involves drilling deep into the earth crust in which a water mixture with high pressure is directed at the rock with the purpose of releasing the gas inside. This process is common in the exploration of natural gas and other hydrocarbons.
It is however illegal because the water are mostly contaminated due to the hydrocarbons present and harmful to life. It is advisable and the best to remove the water and recycle them in treatment plants
