Answer:
See below
Explanation:
PV = n RT R = .082057 L - Atm / (K-Mole)
.97 V = .118 (.082057)(305)
V = 3.04 liters
Will not change for argon.....will be the same for all ideal gases
16.
Which chemical reaction will always be spontaneous? (1 point)
an endothermic reaction in which
entropy increases
an exothermic reaction in which
entropy increases
an endothermic reaction in which
entropy decreases
an exothermic reaction in which
entropy decreases
Answer: an exothermic reaction in which entropy increases
Explanation:
Spontaneous reactions normally cause an increase in entropy and are also exothermic.
A 0.600-L sample of a 3.75M solution of potassium iodide (KI) contains what mass of KI?
the molarity of a solution made by dissolving 5.67 g of potassium chloride in enough water to make 100.0 mL of solution.
When FeCl2 reacts with K2S, potassium chloride and two compounds are produced. What is the name of the one of the compounds?
Because this is a double replacement reaction, the iron and potassium will swap places, giving [tex]\text{K}_{2}\text{Cl}_{2}[/tex] and [tex]\text{FeS}[/tex].
The names of these compounds are potassium chloride and Iron(II) sulfide
If you made 10.8 moles of AlCl₃, how many moles of Aluminum would you need?
Answer: 10.8 mol
Explanation:
The balanced equation in the image represents the reaction where aluminum chloride is formed from its elements.
From this equation, we know that for every 2 moles of aluminum consumed, 2 moles of aluminum chloride are produced (we can reduce this to conclude that moles of aluminum consumed = moles of aluminum chloride produced)
This means the answer is 10.8 mol.
How many particles are in 2.5 mol of water, H2O?
Answer: 1.5×1024 molecules
Which statement correctly defines digestion
1.digestion is mixing food with Silva, which is when Mechanical digestion starts.
2.digestion is chewing food, which is a means of chemical digestion.
3.digestion is a reversible process due to mechanical digestion.
4.digestion is the process of breaking down food into smaller molecules
Answer: 4
Explanation: digestion is the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body.
Answer:
4.digestion is the process of breaking down food into smaller molecules
Explanation:
Which of the following has the most thermal energy? 500 mL water at 25°C 1.5 L water at 25°C 15 L water at 25°C
Answer:
15 L water at 25℃
Explanation:
Answer:
15 L water at 25°C
Question: As the temperature of a substance increases, the average kinetic energy of the particles in the substance
Answer: increases
Explanation:
Part A Only trace amounts of the synthetic element darmstadtium, atomic number 110, have been obtained. The element is so highly unstable that no observations of its properties have been possible. Based on its position in the periodic table, propose three different reasonable valence electron configurations for this element
Darmstadtium based on its position in the periodic table, proposes three different reasonable valence electron configurations for this element is 2.
What is darmstadtium?Darmstadtium was first synthesized by research scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany in 1994. The element was made by bombarding lead-208 atoms with nickel-62 atoms in a heavy-ion accelerator. Four atoms of darmstadtium were produced in the first experiment.
Darmstadtium is a chemical element with the symbol Ds and atomic number 110.
It is an extremely radioactive synthetic element.
Darmstadtium based on its position in the periodic table, proposes three different reasonable valence electron configurations for this element is 2.
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How many grams are in 3.45 moles CO2
To Find:-
Grams Present in 3.45 Moles of Carbon.
We Know:-
Molecular Mass of Carbon Dioxide= 44.01 grams/mol or 44 grams/mol
[tex] \text{Moles} = \frac{\text{Mass}}{\text{Molecular mass}}[/tex]
[tex] \implies 3.45 \text{moles} = \frac{ \text{Mass}}{44 \text{g/mol}} \\ \\ \implies \text{Mass} = {44 \text{g/mol}} \times 3.45 \text{moles} \\ \\ \implies \text{Mass} = {44 \text{g/} \cancel\text{ mol}} \times 3.45 \cancel\text{moles} \\ \\ \implies \text{Mass} = 44 \text{g} \times 3.45 \\ \\ \implies \text{Mass} = \red{151.8 \text{g}}[/tex]
[tex]\therefore \text{Mass of 3.45 Moles of Carbon Dioxide is = \red{151.8g}}[/tex]
Hope This Helps!!About how long does it take for the moon to cycle through all its different observable shapes? (2 points)
Group of answer choices
A day
A month
A year
An hour
Answer:
A month
Explanation:
How many moles of MgBr2 are 75.24g of MgBr2
Answer:
0.409 mol
Explanation:
The formula to find he number of moles is:
No. of moles = [tex]\frac{mass}{Mr}[/tex]
Mr of MgBr₂ = 24.3 + (79.9 × 2) = 184.1
Mass = 75.25g
So, no. of moles = [tex]\frac{75.24}{184.1}[/tex]
No. of moles = 0.409 mol [to 3 significant figures]
Calculate the number of moles in 5.2g CaCO3
Answer: 0.052moles
Explanation:
number of moles = given mass (g) / molar mass(g/mol)
n=m/M
n= 5.2g/ (40 + 12 + 48)g/mole
n=5.2g/100g/mol
n=0.052 moles
how many elements are in a Sulfur dioxide
PLEASE HURRY!!!!!!
1. Good health is dependent upon…
Proper food
Exercise
Rest
All of the above
2. Which of the following has the highest tetanus potential?
A cut by barbed wire at a dairy farm
The puncture of a kitchen knife
An infesting by ticks
The bite of a wild animal
3. (Select all that apply) The three general requirements for resisting disease are:
Exercising
Eating food high in calories
Getting plenty of rest
Eating food that will give you proper nutrition
Taking lots of vitamins
4. Which areas have the fastest population growth?
Agriculture
Suburban
Rural
Cities
5. Every nation has something to develop for the world’s benefit.
True
False
6. Hypothermia can be prevented by proper planning.
True
False
7. Not all land on Earth is currently habitable; ________________.
Therefore, there is not enough land left to inhabit.
Therefore, there is not enough land left to support the growing population
Therefore; there is not enough land left to farm
But, there still remains a vast amount of land to e inhabited all over the Earth
8. Tetanus is sometimes referred to as “lockjaw”.
True
False
9. (Select all that apply) The whooping cough and measles can be prevented by:
Washing hands
Mosquito netting
Sharing eating utensils
Checking for ticks
Vaccination
10. Rabies, typhus and malaria are…
Transmitted by animal bites
Disease which have been eradicated
All untreatable
Caused by viruses
11. Which of the following diseases is caused by a virus?
Malaria
Athlete's foot
Smallpox
Cholera
12. The two internal mechanisms that fight disease include white blood cells and _______.
Antibodies
Vaccines
THANK YOU FOR THE ANSWERS AND PLEASE HURRY! AMEN AND BLESS YOUR SOUL AND HEART!!!!
Answer:
1) d. all of the above
2) a. cut from a barbed wire at a dairy farm
3) check 3, 4, 5
4) b. suburban areas
5) true
6) is true
7) d. "but..."
8) true
9) check 1, 2, 5
10) a. animal bites
11) c. smallpox
12. antibodies
What does the word inquire with respect to the process scientific inquiry
Answer:
Science is all about learning and understanding something new. Inquiry means to ask for information or investigate something to find out more. So, scientific inquiry is using evidence from observations and investigations to create logical explanations and answer questions.
Which type of solid is usually the hardest?
• Ionic
• Molecular
• Network
• Metallic
Answer:
metallic is the correct one
Explanation:
Any metal such as iron are usually hard
Metallic type of solid is usually the hardest. Option D is correct.
What is metal?A metal is a solid which is hard in nature shiny and smooth and produce sound when collide with each use to make ornaments, utensils or big machines etc. as there are different metals and hard too.
Some examples are gold, silver, copper, platinum, steel etc. they all are good conductor of electricity mostly copper is used to make wires and steel for making buildings etc. because of strong molecular force they are hard.
Therefore, Metallic type of solid is usually the hardest. Option D is correct.
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2H2O2(aq) → 2H2(l) +O2(g) +196.4 kJ. What is the ∆H for a reaction in which 125 mL of 0.90 M H2O2 is completely decomposed?
Answer: When completely decomposed it will be -11 kJ
Balance the following reaction:
K3PO4 (aq) +
_Ca(OH)2 (aq) →
_Ca3(PO4)2 (s) +
KOH (aq)
Answer:
3 Ca(OH)2 + 2 K3PO4 ---> Ca3(PO4)2 + 6 KOH
Explanation:
Just balance each atom on both sides.
Does a precipitate form when you add 32.5 g of NaCl to 131.0 mL of 0.29 M Pb(NO3)2? (Ksp for possible ppt is 1.7 x 10-5)
Precipitate forms when you add 32.5 g of NaCl to 131.0 mL of 0.29 M [tex]Pb(NO_3)_2[/tex]
What is Ksp?
The solubility product constant, Ksp, is the equilibrium constant for a solid substance dissolving in an aqueous solution.
Writing the equation:
NaCl → [tex]Na^+[/tex] + [tex]Cl^-[/tex]
[tex]Pb(NO_3)_2[/tex] → [tex]Pb^2^+[/tex] + [tex]2NO^3^-[/tex]
[tex]Pb^2^+[/tex] + 2[tex]Cl^-[/tex] ↔ [tex]PbCl_2[/tex]
I.P = [ [tex]Pb^2^+[/tex]] * [ [tex]Cl^-[/tex] ]
Ksp [tex]PbCl_2[/tex] =[ [tex]Cl^-[/tex] ] * [[tex]Pb^2^+[/tex] ]
1.7 x [tex]10^-^5[/tex]= [ [tex]Cl^-[/tex] ] * [ [tex]Pb^2^+[/tex] ]
Molarity of NaCl = 4.24 M
Molarity of [tex]Pb(NO_3)_2[/tex] = 0.29 M
Ksp [tex]PbCl_2[/tex] =[ Cl- ] * [[tex]Pb^2^+[/tex] ]
Ksp << IP ⇒ precipitate formation will not take place.
Hence, the precipitate formation will not take place.
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2Na + 2H20 - 2NaOH + H2
→
For the reaction shown here, predict the number of moles of both products, sodium hydroxide, and hydrogen gas, when ten moles of
sodium and ten moles of water fully react
A
B)
Ten moles of sodium hydroxide and ten moles of hydrogen gas will be
produced
Ten moles of sodium hydroxide and five moles of hydrogen gas will be
produced
Five moles of sodium hydroxide and ten moles of hydrogen gas will be
produced
moride and five moles of hydrogen gas will be
Answer: B) Ten moles of sodium hydroxide and five moles of hydrogen gas will be produced
Explanation: Got it right on USATestPrep
How much energy is required to 100.0 g of ice at -2oc to water at 84.0oc
Answer:
A copper cup with a mass of 100.0 g contains 96.0 g of water. Both. the cup and the water are at 13.0OC. If 70.0 g of a substance at 84.0OC is added to the cup, the temperature increases to 20.0OC. If the specific heat capacities of copper and water are exactly 390 and 4180 respectively, find the specific heat capacity of the substance.
Explanation:
hope this helps
Convert 34.0 mm to inches. Please use dimensional analysis, I know the answer is 1.34in I just don’t know how to get there.
[tex]34.0mm\ x\ \frac{cm}{10mm}\ x\ \frac{in}{2.54cm}[/tex]
put your equation so that your units cancel. The 'mm' will cancel with each other which will get you 'cm' and then the 'cm' will cancel with each other which will get you 'in'.
34.0 millimeters converted to inches would be 1.3385 inches.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
Any additional quantity of that type can be stated as a multiple of the measurement unit.
Length is one of the most commonly used measurement parameters.
As given in the problem statement we have to convert Convert 34.0 mm to inches by using the dimensional analysis,
As we know that millimeters and inches, both are units of length,
1 millimeter = 0.0393701 inches
34.0 millimeter = 34.0× 0.0393701 inches
= 1.3385 inches
34.0 millimeters converted to inches would be 1.3385 inches.
Thus, 34.0 millimeters converted to inches would be 1.3385 inches.
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URGENT PLEASEEEE, WILL GIVE 100 POINTS
Laughing gas, N2O can be turned into smog NO2 by heating the laughing gas in the presence of oxygen. _____N2O + _____O2 -->_____NO2
If 9.00 grams of laughing gas react. How many moles of oxygen react?
If 7.50 grams of oxygen react, how many grams of smog are produced?
Let's balance
2N_2O+3O_2---->4NO_2Moles of laughing gas
9/440.2mol2 moles need 3 mol O_2
1 mol needs= 1.5mol O_2
moles of O_2.
1.5(0.2)0.3mol#2
3 molO_2 produces 4 mol smog 1 mol produces 4/3=1.3mol smogMoles Of O_2
7.5/320.2molMoles of smog
1.3(0.2)=0.26molMass
0.26(46)11.96g2N₂O + 3O₂ ⇒ 4NO₂
mol N₂O = 9 g : 44 g/mol = 0.205
mol O₂ = 3/2 x 0.205 = 0.3075
mass O₂ = 0.3075 x 32 g/mol = 9.84 g
=================================
mol O₂ = 7.5 g : 32 g/mol = 0.234
mol NO₂ (smog) = 4/3 x 0.234 = 0.312
mass NO₂ = 0.312 x 46 g/mol = 14.352 g
Your vocal cords act like a guitar string. True or false and why
Answer:
True
Explanation:
Vocal folds vibrate when excited by aerodynamic phenomena; they are not plucked like a guitar string. Air pressure from the lungs controls the open phase. The passing air column creates a trailing “Bernoulli effect,” which controls the close phase.
Answer:
yes
Explanation:
well for some people because some times u can control your voice and sometimes u just get voice cracks
Oxidation state of Nitrogen in N2O5
Explanation:
Oxidation state of Nitrogen in N2O5 is +5
Can someone help me with this
What is this chemistry form
Answer:
Think it's C16H31FN2O2, but I couldn't find anything else about it.
Explanation:
It's an organic chemistry skeletal structure and it's very difficult to explain how to read. Hopefully this gave you a push in the right direction, I know it wasn't the most complete answer.
Please help me im begging
if the temperature in the gas cylinder shown increases to 30.0°C and the pressure increases to 1.20, will the cylinder's piston move up or down
Answer:
Up
Explanation:
how many quartz does 456 ml contain
Answer:
431536.9mL
Explanation:
Part A
Measure and record the masses of all the metal strips you set out in front of the test tubes.
B IU x X2 10pt
iii
Imi
hili
ole
Test tube
Metal
Mass (g)
1
magnesium
2.
zinc
3
copper
magnesium
4
5
zinc
6
copper
This is a good answer:
