Answer:
15.9 psi
Explanation:
conversion factor:
1 atm = 14 6959 psi
1.08 atm × (14 6959 psi/1 atm) = 15.9 psi
1. What fraction of a sample of N-16 remains undecayed after 42.78 seconds?
Answer:
1/64
Explanation:
From the question given above, the following data were obtained:
Time (t) = 42.78 s
Fraction of N–16 remaining (N/N₀) =?
NOTE:
N₀ => is the original amount.
N => is the amount remaining.
Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:
Time (t) = 42.78 s
Half-life (t½) of N–16 = 7.1 s
Number of half-lives (n) =?
n = t / t½
n = 42.78 / 7.1
n = 6
Thus, 6 half-lives has elapsed.
Finally, we shall determine the fraction of N–16 that remains undecayed. This can be obtained as follow:
Number of half-lives (n) = 6
Fraction of N–16 remaining (N/N₀) =?
N = 1/2ⁿ × N₀
N = 1/2⁶ × N₀
N = 1/64 × N₀
Divide both side by N₀
N/N₀ = 1/64
Therefore, 1/64 of the sample remains undecayed.
Please help me!!!! I will give you brainliest!!!
Answer:
A and C
Explanation:
I think it's A and C but I could be wrong
What is your hypothesis (or hypotheses) for this experiment? (this is for the thermal energy transfer)
Answer:
Hypothesis is a statement of expectation or prediction that will be tested by research
How do you balance these equations?
Answer:
1Al₄C₃ + 12H₂O → 3CH₄ + 4Al(OH)₃
Explanation:
SOLUTION :-
Balance it by using 'hit & trial' method , and you'll get the answer :-
1Al₄C₃ + 12H₂O → 3CH₄ + 4Al(OH)₃
VERIFICATION :-
In reactant side of equation :-
Number of atoms in Al = 1×4 = 4Number of atoms in C = 1×3 = 3Number of atoms in H = 12×2 = 24Number of atoms in O = 12×1 = 12In product side of equation :-
Number of atoms in C = 3×1 = 3Number of atoms in H = (3×4) + 4(1×3) = 24Number of atoms in Al = 4×1 = 4Number of atoms in O = 4(1×3) = 12Number of atoms of each element is equal in both reactant & product side of equation. Hence , the equation is balanced.
According to collision theory, which of the following statements explain why an increase in temperature increases the rate of a chemical reaction? (Select all that apply.)
Answer:
The reactant particles have a greater average kinetic energy.
A smaller fraction of the reactant particles have energy greater than the Ea.
If an object is on top of a hill or in a position raised above the ground, it must have __________.
Answer:
The force applied to the object is an external force, from outside the system. When it does positive work it increases the gravitational potential energy of the system. Because gravitational potential energy depends on relative position, we need a reference level at which to set the potential energy equal to 0.
If an object is on top of a hill or in a position raised above the ground, it must have gravitational potential energy.
What is Potential Energy ?
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors
If an object is lifted, work is done against the force of gravity.
When work is done energy is transferred to the object and it gains gravitational potential energy.
If the object falls from that height, the same amount of work would have to be done by the force of gravity to bring it back to the Earth’s surface.
Due to the Principle of Conservation of Energy we can say that:
Gravitational potential energy at the top = kinetic energy at the bottom
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Help me quickly plz
Answer:
Explanation:
The answer is B
PLZ HELP PLZ PLZ ILL MARK AS BRAINLIESTT!!!
The decomposition of water into hydrogen gas Hy and oxygen gas Oz can be modeled by the balanced chemical equation
A)
H2 + 02 - H20
B)
H20 - H2 + O2
C) 2H2 + 02 - 2H20
D)
2H20 - 2H2 + O2
Answer:
D. ) 2H2O - 2H2 + O2
Name the following alkyne:
A. propane
B. propene
C. propyne
D. methyne
The name of the alkyne which is given in the question with structure is propyne as in that 3 carbon atoms are present.
What are alkynes?Alkynes are those hydrocarbons in which triple bond is present between two adjacent carbon atoms.
In the given structure one triple bond is present between first two carbon atoms and then with this a single bonded carbon atom is also attached. As in the structure total three carbon atoms are present so prefix shoul be 'prop' and as this is an alkyne then name should be propyne.
Propane is wrong because it is used with single bonded hydrocarbons.Propene is also wrong as it is used with double bonded hydrocarbons.Methyne is also wrong as it is not a word that make any sesne.Hence name of compound is propyne.
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Propyne is the chemical name for the given alkyne. Therefore, the correct option is option C.
A triple bond exists between the carbon atoms in alkynes, a group of hydrocarbon molecules. They are given names based on the IUPAC (International Union of Pure and Applied Chemistry) guidelines for systematic nomenclature. Alkyne nomenclature's primary objective is to provide each compound a precise and distinctive name that accurately captures its structure. Based on the quantity of carbon atoms, the placement of triple bonds, and the presence of functional groups, alkyne compounds are named systematically.
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how to calculate the mass percent of hydrogen
Answer:
divide the mass of element in 1 mole of the compound by the compound's molar mass and multiply the answer by 100.
Explanation:
take the molar mass of hydrogen in the water molecule, divide by the total molar mass of water, and multiply by 100.
does it help?
is sodium oxide an acidic oxide or a basic oxide
Answer:It a Basic oxide
Plz trust Me
Explanation:
Answer:
Sodium oxide is a simple strongly basic oxide. It is basic because it contains the oxide ion, O2-, which is a very strong base with a high tendency to combine with hydrogen ions. Reaction with water: Sodium oxide reacts exothermically with cold water to produce sodium hydroxide solution.
Explanation:
What is the molar mass of Fe(NO3)2?
Answer:
Explanation:
179.8548 g/mol
The total mass of all the atoms that make up a mole of a specific molecule, measured in grams, is known as the molar mass or molecular weight. Here the molar mass of Fe(NO₃)₂ is 179.87 g/mol.
One mole of any substance has a mass known as a molar mass. An amount that has a mass equal to its atomic or molecular mass in grams is referred to as a mole of any species (atoms, molecules, ions, or particles). The letter "M" stands for molar mass.
In other terms, the molar mass is the sum of the masses of all the atoms that make up a mole of a specific molecule, expressed in grams.
Here the molar mass of Fe(NO₃)₂ is :
Fe(NO₃)₂ = (1 x 55.85 g) + (2 x 14.01 g) +(6 x 16.00 g)= 179.87 g/mol
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please help me! I put the max brainly points!
Answer:
579 mL, .96 kPa, 34.21 c
Explanation:
Explanation:
1.Answer:579 ml
2.Answer:0.96
3.Answer:34.21 C
This is the right Answer :3
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1. It has been suggested that pain results from a change in the pH of solutions that surround nerves in the body.
Many irritating insect bites, for example, are acidic. The fluid inside your cells is also slightly acidic. When a cut
or a burn releases this fluid, the pain is signalled through your nerve endings. What would you expect to find if
you tested the pH of creams and lotions that are used to treat insect bites? Explain our answer. (2 marks)
2. Explain why a compound named methene cannot exist. (2 mark)
Answer:
See Explanation
Explanation:
According to the question, it is established that the pain caused by a lot of insect bites owes to the acidity of the insect bites.
If this is true, then there is an urgent need to neutralize the acidic insect bite using a basic substance.
Hence the pH of the creams used to treat insect bites should be basic(having a high pH).
2. The compound methene can not exist because it is supposed to be derived from the alkane called methane which contains only one carbon atom.
In order to form an alkene, there must be a double bond between two carbon atoms. This is not possible because there is only one carbon atom in the hypothetical methene. Hence, a compound named methene cannot exist.
A gas occupies 4.31 liters at a pressure of 150 mm Hg. Determine the volume if the pressure is increased to 725 mm Hg.
Answer:
0.89 L
Explanation:
Applying,
Boyle's Law,
PV = P'V'..................... Equation 1
P represent initial pressure, V represent initial volume, P' represent final pressure, V' represent final volume
Make V' the subject of the equation
V' = PV/P'.............. Equation 2
From the question,
Given: P = 150 mm Hg, V = 4.31 liters, P' = 725 mm Hg
Substitute these values into equation 2
V' = (150×4.31)/725
V' = 0.89 L
gu khayo bhana m hunxa hola
Answer:
[tex] \huge\pink{\boxed{\mathfrak{Hola}}}[/tex]
I didn't understand the rest of your question, it's not in English or Spanish.
[tex]\huge\fbox{HôLLa}[/tex]
What is a volume. in your own words but be more detailed about what you say.
Answer:
volume is the amount of space in a certain object
What biological molecule that is used for energy is represented by the structure below?
Answer:
Glucose. C6H12O6
Explanation:
In aerobic respiration glucose generate ATP. Which are the source of energy.
How many moles are in 15.3 grams of KNO3?
Answer:
0.151 mol
Explanation:
molar mass of KNO3 = (39.1 + 14 + 3×16) g/mol = 101.1 g/mol
number of moles = mass/molar mass
n = m/M = 15.3 g/(101.1 g/mol) = 0.151 mol
What is 190 K in degrees Celsius? Show your work for full credit.
Answer:
-83.15
Explanation:
190K − 273.15 = -83.15°C
Calculate the amount of heat energy is needed to raise the temperature of 5.00 grams of lead from 25.0 to 35.0 degrees Celsius, if the specific heat capacity of lead is 0.129 J/g/C.
Answer: 6.45 Joules
Explanation: I just did it
The specific heat of water is 4.184 J/g·K. How much energy must be added to 100.0 g of water to raise the temperature of water from 22.0 ºC to 90.0 ºC?
Answer:
10.9C digrey celsios and im sorry
Give an example of Carbon atoms getting into the biosphere:
Answer:
Carbon in the biosphere
Explanation:
Carbon is found in the biosphere stored in plants and trees. Plants use carbon dioxide from the atmosphere to make the building blocks of food during photosynthesis. Carbon is found in the hydrosphere dissolved in ocean water and lakes. Carbon is used by many organisms to produce shells.
1. How do scientific investigations begin?
conclusion
inquiry
testing
hypothesis
Answer:
Hypothesis is the answer
What mass in grams of PCl5 will be produced from 0.25 moles of PCl3 and excess chlorine gas?
Answer:
d
Explanation:
What is the volume of 0.9 g of O2 at STP?
A sample of an unknown metal has a mass of 120.4 g. As the sample cools from 90.5°C to 25.7°C, it releases 7020 J of energy. Usinf the chart below, what is the identity of the metal in the sample? Hint Calculate specific heat first Substance Specific Heat Water (liquid) 4.184 J/g °C 0.899 J/g °C 0.803 J/g °C 0.449 J/g °C a) Aluminum ) b) Granite Oc) Water d) Iron
Answer:
Explanation:
sheesh i wouldn’t know
Given the reaction at equilibrium : H 2 (g)+I 2 (g)+53.0kj <-> 2Hl(g) The equilibrium will shift to the right if there's an increase in
We can see that heat is added on the left side of the reaction, which means that the reaction required heat to take place and is endothermic
because the reaction is endothermic, (absorbs heat to proceed), more heat will shift it towards the product side
because there is an equal number of gaseous moles on both the sides, a change in pressure or volume won't affect the equilibrium
Zn + 2HCl → ZnCl2 + H2
How many moles of hydrogen are produced from the reaction of
6.0 moles of zinc?
Answer:
6
Explanation:
6.0mol ( 1 mol H2/ 1 mol Zn ) = 6.0 mol of H2
H2 is hydrogen gas (hydrogen in the air).