The pressure of the confined gas will be 769-17 = 752 mmHg
What is Manometer ?Manometer is a U shaped instrument which is used to measure the pressure acting on a column of fluid , a difference in the pressure in the two arms of the manometer causes the liquid to reach different heights.
The difference in the heights of the Hg columns in Diagram B is17 mm-Hg.
the atmospheric pressure is 769 mm-Hg,
the pressure of the confined gas in mm-Hg = ?
The pressure of the confined gas will be 769-17 = 752 mmHg
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Which is the SI base unit for mass?
meter
pound
gram
foot
Answer:
[tex]gram[/tex]
Explanation:
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a person who eats three servings of the cereal without milk will consume__ calories__ grams of carbohydrates
A person who eats three servings of the cereal without milk will consume about 117 percent of calories.
What is Calorie?This is defined as a unit of energy and is commonly used in the body system.
One serving of cereal without milk will contain 39 percent of calories while three servings will be 117 percent.
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Which of the following would be appropriate
reason(s) for scientists to reject atomic theory
According to the atomic theory, atom is the smallest unit that composes matter.
What is the atomic theory?The atomic theory refers to the theory that insists that the atom is the smallest unit that composes matter.
Scientists may reject the atomic theory if;
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In which stage do vertebrate embryos or offspring show the most similarities?
Answer:
All developing vertebrates appear very similar shortly after gastrulation. It is only later in development that the special features of class, order, and finally species emerge. All vertebrate embryos have gill arches, notochords, spinal cords, and primitive kidneys
Explanation:
I hope this helps you! :)
explain what might happen to an organism if it could not adapt to an external change.
Answer:
it would slowly die off and the kinda of animal will not be there because it cant live there because they cant adapt to stay alive
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In a calorimeter, a 1.0 g sample of magnesium is burned to form mgo. in doing so, 25.5 kj of energy are released. what is the molar enthalpy of combustion in kj/mol of magnesium?
question 2 options:
0.6324
1.54 x 1025
0.0392
620
25.5
The molar enthalpy of combustion in kj/mol of magnesium is 620 kj/mol, Option D is the correct answer.
What is enthalpy of Combustion ?The energy released when a fuel is oxidized by an oxidizing agent is called enthalpy of Combustion.
It is given that
a 1.0 g sample of magnesium is burned to form MgO. in doing so, 25.5 kj of energy are released.
Molecular weight of Magnesium = 24.35g
24.35 g makes 1 mole of Mg
1g = 1/24.35
For 0.04 moles 25.5 kJ is released
for 1 mole 25.5 *1/.04
= 620 kj/mol
Therefore the molar enthalpy of combustion in kj/mol of magnesium is 620 kj/mol.
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Scientists observe that iron compounds are able to bind to nutrients in waterways experiencing eutrophication. Which change will most likely occur if iron compounds are added to a lake with an overabundance of nutrients? (1 point)
1. Fewer microorganisms will grow on the surface of the lake
2. More areas of hypoxia will occur in the lake.
3. More contaminated water will reach the lake.
4. Less sunlight will reach aquatic plants in the lake.
Which phrase best describes fracking?(1 point)
1. removing the top layer of an ore-bearing mountain to access oil and gas resources
2. using water and chemicals at high pressure to open up fissures to access oil and gas resources
3. using water and chemicals at high pressure to open up fissures to access mineral resources
4. removing the top layer of an ore-bearing mountain to access mineral resources
SOMEONE PLEASE HELP QUICK!!!
(1) Fewer microorganisms will grow on the surface of the lake if iron compounds are added to a lake with an overabundance of nutrients. Hence, option 1 is correct.
(2) Fracking means using water and chemicals at high pressure to open up fissures to access oil and gas resources. Hence, option 2 is correct.
What are microorganisms?An organism that can be seen only through a microscope.
Iron is a natural capping agent which can enhance sediment P binding capacity, thus reducing P availability and shifting a lake from an algal to a macrophyte dominated state. Iron could, however, also impose toxic effects on the biota.
Fracking is the injection of a fluid at high pressure into an underground rock formation to open fissures and allow trapped gas or crude oil to flow through a pipe to a wellhead at the surface.
This technique is used in natural gas and petroleum production.
1) Fewer microorganisms will grow on the surface of the lake if iron compounds are added to a lake with an overabundance of nutrients. Hence, option 1 is correct.
(2) Fracking means using water and chemicals at high pressure to open up fissures to access oil and gas resources. Hence, option 2 is correct
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ladybug beetles chase, capture, and eat smaller insects called aphids. which best describes this relationship?
The relationship is predation. The ladybugs are the predators and the aphids are the prey.
What is predation?Predation is an interaction in which one organism, the predator, eats all or part of the body of another organism, the prey.
As per the information in the question, Ladybug beetles chase, capture, and eat smaller insects called aphids.This means that aphids act as food sources for Ladybug beetles.
Predation can be described as a biological interaction between two organisms belonging to two different species where one organism ( called predator) captures and consumes/eats another organism ( that is called prey).
Here, Ladybug beetles ( that capture and eat small insects) are predators and the insects are prey.
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Which refers to the amount of a solute that will dissolve in a given volume of solvent at a given temperature and pressure?
solubility
supersaturated
dissolution rate
concentrated
Answer:
A. Solubility
Explanation:
got it right on edge 2022
Objects with potential energy got that energy:
A. Entirely from their height above the earth.
B. After work was performed on them.
C. When kinetic energy was released from fossil fuels.
D. Through electromagnetic discharges.
Answer:
D. Through electromagnetic discharges.
Explanation:
What activates a convenient current starting to flow of a fluid?
hlo guys you are so bads i
the conductance of the electric current through the electrolytic solution increases with
a)decrease in dilution
b)increase in dilution
c)increase in concentration
d)low degree of ionization
The conductance of the electric current through the electrolytic solution increases with increase in concentration.
What is electrolysis?The term electrolysis has to do with a situation in which liquids conduct electricity by the movement of ions.
The conductivity of the solution depends on the ions present in the solution. Thus, the conductance of the electric current through the electrolytic solution increases with increase in concentration.
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IB Chemistry - Stoichiometry
In which mixture is NaOH the limiting reagent?
A. 0.20 mol NaOH + 0.10 mol H2SO4
B. 0.10 mol NaOH + 0.10 mol H2SO4
C. 0.20 mol NaOH + 0.10 mol HNO3
D. 0.10 mol NaOH + 0.10 mol HNO3
In which mixture of 0.10 mol NaOH + 0.10 mol [tex]H_2SO_4[/tex], NaOH is the limiting reactant. Hence option B is correct.
What is a limiting reagent?The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops.
Reaction
[tex]2NaOH + H_2SO_4[/tex] → [tex]Na_2SO_4 + 2H_2O[/tex]
For one mole of [tex]H_2SO_4[/tex] we need two moles of NaOH.
Option A: equivalent quantities
Option B: NaOH is limiting rectant.
[tex]NaOH + HNO_3[/tex] → [tex]NaNO_3+ H_2O[/tex]
For one mole of [tex]HNO_3[/tex] we need one mole of NaOH.
Option C: NaOH in excess
Option D: equivalent quantities
In which mixture of 0.10 mol NaOH + 0.10 mol [tex]H_2SO_4[/tex], NaOH is the limiting reactant. Hence option B is correct.
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What causes this nuclear reaction to occur
Answer:
bombarding it with an energetic particle
Explanation: nuclear reaction, a change in the identity or characteristics of an atomic nucleus, induced by bombarding it with an energetic particle. The bombarding particle may be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy-ion.
how many grams of water would require 22000 joules of heat to raise its temperature from 34 C to 100 C. THe specific heat of water is 4.2 j/g C
The mass of water required to raise 22000 joules of heat from a temperature of 34°C to 100°C is 79.37g.
How to calculate mass?The mass of a substance can be calculated by using the following formula:
Q = m × c × ∆T
Where;
Q = quantity of heat absorbed or releasedm = mass of substancec = specific heat capacity∆T = change in temperature22000 = m × 4.2 × (100 - 34)
22000 = 277.2m
m = 22000/277.2
m = 79.37g
Therefore, the mass of water required to raise 22000 joules of heat from a temperature of 34°C to 100°C is 79.37g.
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Please help/show work!
how many grams of n2 has gave a volume of 11.2 liters at stp? ideal gas law
Answer:
7.00335g
Explanation:
[tex]n=\frac{V}{V_m} \\n = \frac{11.2}{22.4} \\n= 0.5 mol[/tex]
[tex]n=\frac{m}{M} \\m=nM\\m=(0.5)(14.0067)\\m=7.00335g[/tex]
Project: modeling nuclear changes on edge
assignment summary:
in this project, you will create models of various atomic nuclei and how they change during radioactive
decay, fission, or fusion. first, you will complete a table that summarizes how the structure of the nuclei
changes during each of these processes. this will help you plan your models.
In designing models of nuclear changes, the models of nuclei in nuclear fission becomes smaller while that in nuclear fusion becomes larger after the reaction.
What are nuclear fission and fusion reactions?Nuclear fission is a type of nuclear reaction in which The nucleus of larger atoms splits into two or more smaller nuclei of atoms of elements.
Nuclear fusion is a type of nuclear reaction in which The nucleus of two smaller atoms fuse to produce nuclei of a larger atom.
Therefore, in the models of nuclear reactions, the models in nuclear fission becomes smaller while that in nuclear fusion becomes larger.
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Answer:
hope this works for u!!!!!!
Explanation:
Substance x is known to exist at 1 atm in the solid, liquid , or vapor phase, depending on the temperature. additionally, the values of these other properties of xhave been determined
Substance x is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature, is mathematically given as
Q=800J.mol^{-1}
What is a graph of the other properties of x?Generally, the equation for heat absorbed is mathematically given as
Q= Heat capacity of solid *T
In conclusion,
Q= (40)(293.15-273.15)
Q=800J.mol^{-1}
In conclusion, Because the enthalpy of fusion is 9 KJmol-1 and we are only providing 6 KJmol-1 of heat, the melting process will not be complete. the graph is attached.
CQ
Substance x is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. additionally, the values of these other properties of x have been determined. show graph
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Emma rubs suntan lotion into her hands. At first her hands stay cool. After the cream is absorbed, her skin begins to get warm. Why do her hands stay cool while there is suntan lotion between them
Explanation:Suntan lotion basically evaporates. Sun tan lotion contains a chemical called acetone. So when the sun tan lotion is appilied, her hands feel cool, and as when it evporates in air it becomes warm again.
Additional information: Acetone is also found in Nailpolish remover, medicinal balms, sanitzers etc.
Why isn’t K+ H2O —> KOH + H2 not balanced?
Answer:
The obtained result indicates that the hydrogen atom is not equal on both sides. Thus the reaction is not balanced.
Explanation:
What phrase Best defines energy 
Answer:
the ability to do work.
Explanation:
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Which of the following best describes radioactivity?
Select one:
a. The amount of reactants converted to products in a certain amount of time.
b. The nuclear force that holds the protons and neutrons in the nucleus.
c. The spontaneous release of nuclear particles and energy.
d. The penetrating ability of nuclear particles.
When a racemic mixture is reacted with a single enantiomer of another compound, then a pair of _________ is formed.
When a racemic mixture reacts with a single enantiomer of another compound, then a pair of diastereomers are formed.
What is a racemic mixture?A racemic mixture is an equimolar composition of enantiomers are optically inert. On the right side and the left side of the enantiomer in a chiral molecule, they contain an equal amount.
Now, in an organic reaction:
When a racemic mixture reacts with a single enantiomer of another compound, two compounds are formed and their formation possesses the different configurations on each side. Hence, a pair of diastereomers are formed.
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What is the fundamental difference between covalent and ionic bonding?.
Answer:
An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms.
Is Los Angeles affected by ocean acidification?
Answer:
No son los angeles pero en realidad....
Explanation:
¿Qué provoca la acidificación de los océanos?
Cuando el CO2 es absorbido por el océano, se producen reacciones químicas. En particular, se forma ácido carbónico y se liberan iones de hidrógeno; como resultado, el pH de las aguas superficiales del océano disminuye, haciéndolas más ácidas.
he hybridization of one s and one p orbital will result in the formation of _____ sp hybrid orbitals. This will leave _____ unhybridized p orbital(s), which is/are at right angles to the hybrid orbitals. The formation of a group of sp2 hybrid orbitals leaves _____ unhybridized p orbital(s). Multiple choice question. two; two; no two; two; one three; two; one one; two; one
The complete statement is "The hybridization of one s and one p orbital will result in the formation of two sp hybrid orbitals. This will leave two unhybridized p orbital(s), which is/are at right angles to the hybrid orbitals. The formation of a group of sp2 hybrid orbitals leaves one unhybridized p orbital(s). " Option B. This is further explained below.
What is hybridization?Generally, hybridization is simply defined as hybridization describes the offspring produced when one species of plant or animal mates with another.
In conclusion, After a cluster of sp2 hybrid orbitals forms, there is still one p orbital that is not hybridized (s).
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a natrual distsater caused a population of 4,695 organisms to migrate to a new habitat. a few generations after the disaster it was observed that the new habitat did not sopport the survival of the species. the table shows the population of the species in two habitats
Answer:
49.54%
Explanation:
Given parameters:
Number of organisms in original habitat = 4695
Number of organism in new habitat = 2326
Solution:
To find the percentage of the organisms in the new habitat that has migrated to the new habitat, we use the expression below:
% of the population in the new habitat = x 100
% of the population in the new habitat = x 100 = 49.54%
This is the overall reaction of a mercury oxide dry cell:
Zn+ HgO —> ZnO + Hg
In this reaction, which example gets reduced?
O
HgO
Zn
Hg
Answer:
Hg gets reduced
(Look at the equation; notice how Hg loses O while Zn gains it)
How many moles of NH3 are produced in the reaction of 3.3 moles of N2?
N2 + 3H2 = 2NH3
Answer:
6.6 moles of NH3
Explanation:
3.3 mol N2 * (2 mol NH3/ 1 mol N2) = 6.6 mol NH3
What is the percentage by volume of 30.0 mL ethanol (C2H6O) dissolved in 150.0 mL water (H2O)?
16.7 %
20 %
83.3 %
15 %
Answer: 16.7 %
Explanation:
[tex]\frac{30.0}{150.0+30.0}=\boxed{16.7\%}[/tex]