Answer:
125 gm
Explanation:
15.9 / 5.3 = 3 half lives
1000 (1/2)^3 =
In the equation below
1. If a sample containing 12.5 moles of NH3 is reacted with excess CuO, how many moles of each product can be made?
N2=
Cu=
H20=
thanks!
Answer:
6.25 moles of N₂ is produced, and 18.8 moles of Cu and H₂O is produced.
Explanation:
We are given the chemical equation:
[tex]\displaystyle 2\text{NH$_3$}_\text{(g)} + 3\text{CuO}_\text{(s)} \longrightarrow \text{N$_2$}_\text{(g)} + 3\text{Cu}_\text{(s)}+3\text{H$_2$O}_\text{(g)}[/tex]
And we want to determine the amount of products produced when 12.5 moles of NH₃ is reacted with excess CuO.
Compute using stoichiometry. From the equation, we can see the following stoichiometric ratios:
The ratio between NH₃ and N₂ is 2:1. (i.e. One mole of N₂ is produced from every two moles of NH₃.)The ratio between NH₃ and Cu is 2:3. The ratio between NH₃ and H₂O is 2:3. (i.e. Three moles of H₂O or Cu is produced frome every two moles of NH₃.)Dimensional Analysis:
The amount of N₂ produced:[tex]\displaystyle 12.5\text{ mol NH$_3$} \cdot \frac{1\text{ mol N$_2$}}{2\text{ mol NH$_3$}} = 6.25\text{ mol N$_2$}[/tex]
The amount of Cu produced:[tex]\displaystyle 12.5\text{ mol NH$_3$} \cdot \frac{3\text{ mol Cu}}{2\text{ mol NH$_3$}} = 18.8\text{ mol Cu}[/tex]
And the amount of H₂O produced:[tex]\displaystyle 12.5\text{ mol NH$_3$} \cdot \frac{3\text{ mol H$_2$O}}{2\text{ mol NH$_3$}} = 18.8\text{ mol H$_2$O}[/tex]
In conclusion, 6.25 moles of N₂ is produced, and 18.8 moles of Cu and H₂O is produced.
What are the hazards of sodium chloride
Answer:
Eye: May cause eye irritation. Exposure to solid may cause pain and redness.
Skin: May cause skin irritation. May be harmful if absorbed through the skin.
Ingestion: May cause irritation of the digestive tract. May be harmful if swallowed. Ingestion of large amounts may cause nausea and vomiting, rigidity, or convulsions. Continued exposure can produce coma, dehydration, and internal organ
Inhalation: May cause respiratory tract irritation. May be harmful if inhaled. Chronic: No information found.
why neon is special from other chemical elements
20 POINTS!!!!!!!! NEED ANSWER ASAP
A container of an ideal gas at 300 Kelvin (K) has a volume of 2.5 liters (L). What is the calculated volume, in L, of the gas if the temperature is changed to 100 K?
0.83
1.2
7.5
120
Answer: 0.83
Explanation:
10. How much energy is needed to melt 30 g of H20 at 0°C ?
Why do plants found in the understory have large, wide leaves?
to absorb as much sunlight as possible
to absorb as much water as possible
to absorb as many soil nutrients as possible
to prevent consumers from eating them
Answer:
A. to absorb as much sunlight as possible.
Explanation:
Because they are in the understory, it's a constant competition for sunlight to perform photosynthesis, so they need wider leaves to capture what is filtered by canopy trees.
Answer:to absorb as much sunlight as possible
Explanation:
How many grams are equal to 413kg ?
Answer:
413000 grams
Explanation:
from model
What is the function of carbohydrates in living organisms? (Please use complete sentences)
Answer:
Introduction. Alongside fat and protein, carbohydrates are one of the three macronutrients in our diet with their main function being to provide energy to the body. They occur in many different forms, like sugars and dietary fibre, and in many different foods, such as whole grains, fruit and vegetables.
Explanation:
pleaseee consider as brainlest if i helped you
Only smart people can answer 50points
Answer:
can you give brainliest please
Molar mass of Mg(NO_3)_2
24+2(14+48)24+2(62)24+124148g/molMoles of solute:-
35/1280.27molNow
Volume of solution=0.1LMolarity:-
moles/volume0.27/0.12.7MWhere does reduction occur in an electrochemical cell?
O A. Cathode
O B. Porous barrier
O c. Anode
O D. Conducting wire
Pure water freezes at 0° C (32* F) and boils at 100° C (212' F), a large range for a
liquid, and has an extremely high heat capacity. Why are these properties of water
important?
High specific heat capacity and long liquid range of water make it a good coolant especially in the nuclear plants
High specific heat capacity and long liquid rangeHigh specific heat capacity implies that it takes a very large amount of heat for the temperature of water to change by 1K. This means that water does not heat up easily and does not loose heat easily. Ideally, this informs the long liquid range of water.
These properties together make water a good coolant especially in the nuclear plants where temperatures could get very high.
Learn more about specific heat capacity: https://brainly.com/question/1747943
7Mg(OH)2 how many elements are they?
Answer:
3
Explanation:
magnesium
oxygen
hydrogen
Consider the following equation.
H2O(l) + heat ⇌ H2O(g)
Which will occur if the temperature of the system is increased?
With the increase in temperature, the state of matter of water will changed.
What happen if the temperature of the system is increased?If the temperature of water is increased then the state of matter will change from liquid state to gaseous state because the temperature break down the bonds that is present between two water molecules.
So we can conclude that with the increase in temperature, the state of matter of water will changed.
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Q4. Explain why the process is called reduction.
Answer:
The process is called reduction because any loss of electrons by one substance must be accompanied by a gain in electrons by something else, oxidation and reduction always occur together.
What volume of 1. 50m nacl contains 3. 40 moles of nacl?.
Let the volume be V
Molarity=Moles of solute/Volume of solution in LPut values
1.50M=3.4/VV=3.4/1.5V=2.267LWhat is the definition of thermal chemistry?
The study of change that involves cool objects
The study of change that involves temperature
The study of change that involves heat
Answer:
the second one
Explanation:
thermal has to do with temperature
What element goes in the middle of the Lewis structure?
Answer:
The atom that requires the largest number of electrons to complete its octet
Explanation:
hope this helps
What would the volume of a gas be at –150°C, if it had a volume of 693 mL at 45°C?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Volume of gas at 40° C is 1.79 L
Refer to the attachment for solution ~
Can y’all answer this Plss!! 100 points
Refer to the attachment
V1=0.271L=271mLApply Boyles law
[tex]\boxed{\sf {P\propto \dfrac{1}{V}\atop \implies \dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}}}[/tex]
So
0.92/0.55=473.218/V1V1=472.218(0.55)/0.92V1=0.271LThe following balanced equation shows the formation of ammonia. n2 3h2 right arrow. 2nh3 how many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen? 1.02 mol 2.11 mol 12.68 mol 19.02 mol
The required moles of nitrogen which are needed to completely convert 6.34 moles of hydrogen is 2.11 moles.
What is the stoichiometry?Stoichiometry of any reaction gives idea about the relative amount of reactants and products are present in any chemical reaction in terms of moles.
Given chemical reaction is:
N₂ + 3H₂ → 2NH₃
From the stoichiometry of the reaction:
3 moles of H₂ = reacts with 1 mole of N₂
6.34 moles of H₂ = reacts with 1/3×6.34=2.11 moles of N₂
Hence required moles of nitrogen are 2.11.
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Give a simple meaning of the word viscosity in your own words.
Answer:
Viscosity is the measure of how much something can flow.
Explanation:
For example Honey is high in viscosity because it does not flow well. But water on the other hand is low in viscosity because it flows well
Which scenario would be classified as potential energy?
A car driving up a hill
A car sitting on top of a hill
The plane flying the skydiver to the jump mark
Answer:
a car sitting on top of a hill
Explanation:
if it's sitting it has no kinetic energy
Based on the kinetic theory, which statement is true? (5 points) Matter consists of only large molecules. Matter is made up of only charged particles. The particles of matter have zero kinetic energy and potential energy. The particles of matter are arranged in different ways for the different states.
Answer:
The particles of matter are arranged in different ways for the different states.Explanation:
Matter can be made up of small/large molecules or even atomsMatter is also made up of non-charged particles (neutrons)Particles of matter possess kinetic and potential energyMatter is arranged in different ways for different states (solid, liquid, gas, plasma, etc.)Predict what happens to air movement when atmospheric pressure is 760 mm Hg, intrapulmonary pressure is 758 mm Hg, and intrapleural pressure is 754 mm Hg.
Because the atmosphere has a pressure difference of 2 mmHg from the lungs, air will migrate into the lungs to maintain equilibrium.
What happens to air movement when atmospheric pressure is 760 mm Hg, intrapulmonary pressure is 758 mm Hg, and intrapleural pressure is 754 mm Hg.?Generally, pressure is simply defined as the force exerted on an item.
In conclusion,if the above parameters where to occur, we would see air flows from a higher-pressure location to a lower-pressure area.
Read more about Pressure
https://brainly.com/question/25688500
( 20 points plus brainliest! )
Which best describes DDT as a pesticide? Select all that apply.
A) DDT is able to target destructive insects.
B) DDT decomposes very slowly.
C) DDT can be controlled so it does not spread to other areas.
D) DDT results in antibiotic formation in livestock.
E) DDT is readily absorbed by animal tissue.
F) DDT contaminated ground water and runoff into streams, rivers, and oceans.
An unknown substance is found to have a hydrogen concentration of 1.2 * 10 ^ - 2 , what is the pOH? Is it acidic or basic?
Answer:
12.1; acidic
Explanation:
I'm assuming the hydrogen concentration is H+.
So, first we must find pH.
pH = -log[H+]
I simply just plugged in the concentration.
I get 1.9 as the pH. This means that the substance is very acidic since it has a low pH.
Now to find poH.
poH + pH = 14
I simply plugged in once again!
I get 12.1 as the poH. This also determines that the substance is very acidic since it has a high poH.
What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.
The changes occur in reaction are the bond in H₂ is broken, and new bonds are formed between hydrogen and oxygen atoms.
What is hydrogen bond?Hydrogen bond is a type of chemical bond which is formed between the hydrogen atom and more electronegative atom due to high dipole interaction.
Given chemical reaction is:
2H₂ + O₂ → 2H₂O
In the above reaction hydrogen nucleus not loses proton inspite of that it was broken and new bond formation takes place in water.
Despite the fact that oxygen atoms attract electrons from hydrogen atoms, oxygen atoms do not gain electrons.
In the water molecule each electron of both hydrogens is shared with an oxygen atom.
As a result, in the preceding equation, the hydrogen molecule's bond is broken, a new bond is formed, and each hydrogen atom's electron is shared with an oxygen atom.
To know more about hydrogen bonding, visit the below link:
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Answer:
c and d on edge 2022
Explanation:
Which factor is NOT important when choosing a conversion factor? *
•Unit placement of the numerator and denominator (top and bottom)
•Changing the value
•The value must equal 1
•Equivalent things in the numerator and denominator (top and bottom)
The factor that is not important when choosing a conversion factor is that the value must equal 1.
What is a conversion factor?The conversion factor is used to convert values form one unit to another. This operation is common in science when calculations are made that involves units.
Now, the factor that is not important when choosing a conversion factor is that the value must equal 1.
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What does the reaction of an acid and a base produce.
Answer:
I believe that'd create neutral, or pure.
Explanation:
If the temperature of a 50ml sample of gas is changed from 200k to 400K under constant pressure what is a new volume of the gas?
Answer: 100 mL
Explanation: