Answer:
0.72 moles of hydrochloric acid are needed to completely react with 0.36 mol of lead.
Explanation:
The balanced reaction is:
Pb + 2 HCl → PbCl₂ + H₂
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reagent participate:
Pb: 1 moleHCl: 2 molesYou can apply the following rule of three: if by stoichiometry of the reaction 1 mole of Pb reacts with 2 moles of HCl, 0.36 moles of Pb will react with how many moles of HCl?
[tex]amount of moles of HCl=\frac{0.36 molesof PB*2 moles of HCl}{1 mole of Pb}[/tex]
amount of moles of HCl= 0.72 moles
0.72 moles of hydrochloric acid are needed to completely react with 0.36 mol of lead.
The moles of HCl needed to completely react with 0.36 mole of lead is 0.72 moles.
What is stoichiometry of reaction?
Stoichiometry of the reaction tells about the relative amount of the reactants and products present in that reaction in terms of coefficient.
Given chemical reaction is:
Pb + 2HCl → PbCl₂ + H₂
From the stoichiometry of the reaction, it is clear that:
1 mole of Pb = react with 2 moles of HCl
0.36 mole of Pb = react with 2×0.36 = 0.72 moles of HCl
Hence, the required moles of HCl is 0.72 moles.
To know more about stoichiometry, visit the below link:
https://brainly.com/question/21674545
. In a full paragraph, tell what would you do to remove the kudzu from your property forever and what steps you will take to ensure your land and the native species on it are not being harmed. pls answer now
Efforts to control kudzu infestations have included the following methods: cutting, grazing, digging, disking, prescribed burning and application of herbicides. Roots of mature plants grow too deeply to be affected by freezing. Burning will kill only the very young plants.
Ideally, simply pulling out the heavy vines would prevent the kudzu from returning. However, you still need to kill each of the rooted stems at their crowns. Mowing or cutting back the vegetation to the ground provides the first step in removal. Then it’s time to bring out the big guns in the form of chemical herbicides.
Drag the tiles to the correct boxes to complete the pairs.
Match the sequences with the mutations that occurred in them.
deletion translation inversion duplication
translocation
inversion
duplication
Answer:
Yall are coming after that person above me when theres no diagram!!!! HELLO????????????? crazy
Explanation:
The pictures below show samples of different substances.
The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?
A. No, because they have different masses.
B. No, because they have different volumes.
C. Yes, if each sample contains 6.02 x 10^23 atoms.
D. Yes, if each sample contains 2 amu.
Answer:
C. Yes, if each sample contains 6.02 x 10²³ atoms.
Explanation:
It is possible for each sample to contain 1 mole of each sample if and only if each of the sample if made up of 6.02 x 10²³ atoms.
6.02 x 10²³ atoms is the Avogadro's number. This number is equivalent to a mole of a substance.
If the amount of matter in the given substance is at least one mole, it is possible that they are made up of one mole each of each substance. If they contain lesser amount of atoms, then it is not up to one mole of substance. But if it is greater, then, we can have even more than one mole of substance.A mole is simply a unit of measurement and it is equivalent to 6.02 x 10²³ atoms.
Answer:
C
Explanation:
i just took the test
:)
A scientist dissolves 10 g of NaOH into 0.275 L of water. What is the
molarity of the solution?*
0.3636 M
0.9091 M
O 0.2750 M
0.8956 M
Please help I’m being timed
Explain the effect of pressure on the following chemical equation :
[tex]CaCO_3 = CaO + CO_2[/tex]
2. Explain the effect of concentration in the following equation :
[tex]3Fe \: +4H_2O= Fe_3 \: O_4 + 4H_2[/tex]
Answer:
Explanation:
One
Pressure will favor the side with the least number of mols if it the larger number of moles counts only the gases. (Le Chetalier's Principle). In this case both CaCO3 and CaO are not soluble in water. The only gas is CO2. Since it represents the most number of mols the reactant is favored.
More or Less are very troublesome words in beginning science. Make sure you understand their meaning for this question. The more pressure applied, the more the reactants will be favored and the equation shifts left.
Two
Fe and Fe3O4 are both solids. It depends on the form that water takes. Looking it up, it is shown to be in a gas form. That means if you increase the pressure, nothing will happen. That is not your question, but you should note it.
The answer to your question is you increase the concentration of Fe or H2O, the equilibrium will shift right.
If you add more Fe3O4 or hydrogen it will shift left.
Chemists say that if you alter the equilibrium the equation will shift in the opposite direction to compensate for the action you have taken.
what is the theoretical yield (in mols) of magnesium when 1.1 x 102 mols of lithium reacts with excess magnesium chloride.
Explanation:
Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound by the molar mass of the compound expressed in grams.
A student views four models showing magnified views of the phases of matter.
What question will best help the student determine which model is plasma?
A
Which model is composed of rapidly moving particles?
B.
Which model is composed of particles vibrating in place?
C
Which model is composed of electrically charged particles?
Which model is composed of particles sliding past each other?
Answer:
C Which model is composed of electrically charged particles?
Explanation:
The best question to resolve and determine the model which is plasma is to find one that is composed of electrically charged particles.
Plasma is one of the states of matter which is characterized by ions and other charged particles.
Matter is anything that has weight and occupies space.
There are four known states of matter which are:
Solid Liquid GasPlasmaPlasma is the only state of matter made up of charged particles.
The team of scientists measured the salinity and density of seawater at points throughout the North Atlantic Ocean. Their data is shown on the graph below. What conclusion can you draw about the correlation between salinity and density of seawater?
Answer:
As the salinity of seawater increases, the density of the water also increases.
Explanation:
Edmentum answer
Answer:
The salinity of seawater increases, the density of the water also increases.
Explanation:
A balloon with a volume of 4.00 L is known to contain 0.200 moles of gas. How many moles of gas remain if some of the gas is released and the new volume is 3.25 L. Assume temperature and pressure remain constant.
Please show work, thank you :D.
Explanation:
By Avagadro's Law,
V¹n¹ = V²n², where P and T are constant.
Therefore (4.00L)(0.200mol) = (3.25L)n²,
n² = 0.246mol. (3s.f.)
P.S. n² does not mean the square of n in this case, it is just a subscript.
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Combined Boyle's and Charles' gas law is used here. Therefore, 0.246mol of gas remain if some of the gas is released and the new volume is 3.25 L.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of ideal gas
V= volume of ideal gas
n =number of moles of ideal gas
T =temperature of ideal gas
R = Gas constant = 0.0821 L.atm/K.mol
By Avagadro's Law,
V₁n₁= V₂n₂, where P and T are constant.
V₁×n₁= V₂×n₂,
(4.00L)(0.200mol) = (3.25L)n²
n₂ = 0.246mol.
Therefore, 0.246mol of gas remain if some of the gas is released and the new volume is 3.25 L.
To learn more about ideal gas equation, here:
https://brainly.com/question/14826347
#SPJ2
To have a system you need more than one magnet .
true or false
Answer:
True
Explanation:
Answer: true
Explanation:
What tuberculosis means "
Answer:
it is a infectiousr bacterial disease characterized by the growth of nodules(tubercles) in tissues especially the lungs
6) Determine la concentración de una solución que ha sido preparada añadiendo 80cc de agua a 320cc de solución alcohólica al 20% v/v. Valor: 3 puntos
Answer:
16% v/v es la nueva concentración de alcohol en la solución
Explanation:
El porcentaje volumen/volumen (% v/v) es definido como 100 veces la relación entre el volumen de soluto (Alcohol en este caso) y el volumen total de la solución (Agua + Alcohol). Para resolver esta pregunta necesitamos hallar el volumen de alcohol y el de agua:
Volumen alcohol:
320cc * (20cc etanol / 100cc) = 64cc etanol
Volumen agua:
80cc + (320cc-64cc) = 336cc agua
% v/v:
64cc / (336cc + 64cc) * 100
= 16% v/v es la nueva concentración de alcohol en la solución
ASAP HELP WILL MARK BRAINLIEST FOR BEST ANSWER. MUST ANSWER WITHIN 6 MIN!!!
Answer:
3 molecules
Explanation: i got it right on the test, also because the 2 other ones are compounds because they have hyrdogen and oxygen attached and molecules just have particles of one element attached
Answer:
3 molecules
Explanation:
Magnetic fields all have the same or equal strength .
true or false ?
Identify the properties of a covalent substance (multiple answers )
A) high melting point
B) low melting point
C) soluble in water
D) soluble in alcohol
E) conducts electricity in water
does not conduct electricity in water
A) high melting point
C) soluble in water
D) soluble in alcohol
E) does not conduct electricity in water
these options are a bit vague as some covalent substances dissolve in water / alcohol while some don't
length = 10cm
width = 5cm
mass = 300g
height = 2cm
volume =?
density =? Pls help
Answer:
volume=100
density=100
Explanation:
to get volume you multiply length and width to get area then multiply height=100
to get density you divide mass by volume
Which spot (30° or 90°) on the paper received the greatest amount of energy?
Answer/Explanation: At high angles like 90 degrees, the light doesn't spread out as much and has a more circular shape. As the ... Solar angle influences how much energy is received in an area.
-Bababooeyboy
The process by which water, ice, wind and gravity remove and transport sediment from one place to another
A. Chemical weathering
B. Deposition
C. Physical weathering
D. Erosion
Answer:
either deposition or physical weathering
Answer:
D. Erosion
Explanation:
I will give you a lot of points help me ASAP please I am begging you
Answer:
hope this helps
Explanation:
Can you pls help me
Answer:
the elk population will increase
Explanation:
because the gray wolves eat the Elks so introducing them back into the food chain will mean that more Elks are eaten!
hope that helps
how can I identify a salt compound is acidic,basic,neutral
Salts that are from strong bases and strong acids do not hydrolyze. Salts that are from strong bases and weak acids do hydrolyze, which gives it a pH greater than 7. Salts of weak bases and strong acids do hydrolyze, which gives it a pH less than 7.
If the theoretical yield of a reaction was calculated to be 42.6 grams and when the
experiment was conducted the amount produced was 20.7 grams, the what is the percent
yield of the experiment?
Answer:
48.59%
Explanation:
theoretical yield = 42.6g
actual yield = 20.7g
% yield = 20.7/42.6 x 100 = 48.59% (2 d.p.)
PET is an acronym for what condensation polymer
help asap it needed
Answer:
polyethylene terephthalate
PET (also abbreviated PETE) is short for polyethylene terephthalate, the chemical name for polyester. PET is a clear, strong, and lightweight plastic that is widely used for packaging foods and beverages, especially convenience-sized soft drinks, juices, and water.
Explanation:
hope this helps have a good rest of your afternoon :) ❤
Hi! It would be awesome if you could answer this soon. 20 points!
Answer:
2HgO → 2Hg + O₂
The reaction is a decomposition reaction because from one reactant two products were obtained
Explanation:
The problem here involves balancing the chemical reaction given and also classifying the reaction.
The unbalanced expression is given as:
HgO → Hg + O₂
Assign the alphabets a,b and c as coefficients that will balance the equation
aHgO → bHg + cO₂
Conserving Hg: a = b
O: a = 2c
So, let c = 1, a = 2 b = 2
Therefore;
2HgO → 2Hg + O₂
The reaction is a decomposition reaction because from one reactant two products were obtained
Why do chemical changes happen
Answer:
Reactions occur when two or more molecules interact and the molecules change. ... Bonds between atoms are broken and created to form new molecules. That's it.
Explanation:
Helpppppppppppppppppppppppp
Answer:
I think its A or D
Explanation:
please help me i really am struggling
Answer:
It is visible light
Explanation:
If the mass of an object is 15kg and the volume of an object is 15ml, what is its density?
0 225kg/ml
Okg/ml
1kg/ml
30kg/ml
Answer:
1kg/ml
Explanation:
In a salt synthesis experiment, 13.1 g of sodium reacts with 94 g of chlorine gas, yielding 22.5 g of sodium chloride. 2Na(s) + Cl2(g) →2NaCl(s) What is the percent yield for this experiment?
Answer:
67.58%
Explanation:
First we convert the masses of the reactants into moles, using their respective molar masses:
Na ⇒ 13.1 g ÷ 23 g/mol = 0.570 molCl₂ ⇒ 94 g ÷ 70.9 g/mol = 1.32 molBy looking at the reaction equation, we know that 1.32 moles of Cl₂ would react completely with (2 * 1.32) 2.64 moles of Na. There are not as many Na moles, so Na is the limiting reactant.
Now we calculate how many NaCl moles would have been produced if all the limiting reactant was consumed:
0.570 mol Na * [tex]\frac{2molNaCl}{2molNa}[/tex]= 0.570 mol NaClWe convert those moles to grams:
0.570 mol * 58.44 g/mol = 33.31 g NaClFinally we calculate the percent yield:
22.5 g / 33.3 g * 100% = 67.58%Please help me out with this assignment
Answer:
1. 7 meters
2. gullet
4. Not sure about this
6. strong
7. digestive
8. starch
12. Not sure about this either
14. Water
15. Jejunum
19. teeth
Hope this helps!