Answer:
ALL of these are factors in conservation.
Explanation:
Salt is an ionic compound that is produced when a cation and an anion from an acid-base reaction combine, and solutions of salts can be neutral, acidic, or basic, depending on the acid-base properties of the constituent cations and anions.
a. True
b. False
Answer:
a. True
Explanation:
The statement given regarding salt is correct,
Salt is ionic in nature, as it is composed of a positive ion, i.e. , cation and a negative ion, i.e. , anion.
Salt can be made by the combination of respective acid and base.
There are three nature of salt, acid, base and neutral.
Hence, from the given statement of the question,
The correct option is a. True.
A cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell
A. The cell will contract
B. The cell will expand slightly
C. The cell will burst
D. The cell will remain the same size
By the way I had to ask again because I f forgot to put the answer choices
Answer:
B
Explanation:
If not B then its d
Answer:
D
Explanation:
This would be an isotonic solution. If a cell is placed in a solution of salt with the same concentration of salt in the cell, nothing will happen.
Barry makes a hypothesis that driving with his windows closed will increase
his gas mileage. If the gas mileage does not change, what should Barry do
next?
A. Conclude that the gas additive has gone bad
B. Assume that the hypothesis is not useful because it made a wrong
prediction
C. Change the results to show that the hypothesis is correct
D. Repeat the experiment to confirm the result
Answer: D. Repeat the experiment to confirm the results
HELP PLEASE!! (100 points)
Describe what happens to particles of matter as you cool the matter to absolute zero
(OK). In your description, be sure to explain the changes in kinetic energy and
particle motion
Answer:
As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together. ... As heat is added, the molecules gain more kinetic energy. This shown in their increase motion. When heat is withdrawn, the particles slows down hope this helped
If you were to heat up a 1-kilogram rock and 1 kilogram of water, you would see that the rock both gains heat and loses heat faster than the water. If you allow them to cool down, which one will come back to room temperature faster?
Answer: If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water
Explanation:
Answer:
If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water.
Explanation:
edmentum/plato
The simpler compounds/elements in a synthesis reaction will be in the___ side of the chemical equation
Answer:
Reactants
Explanation:
Synthesis is where two simpler compounds or elements combine. The left side with the simple elements are the reactants and the complicated synthesized compound is the product side.
3x + 4y - 3z) - (2x - 6y + 7z)
x + 10y - 10z
x + 10y - 10z
x -10y - 10z
Answer: x + 10y - 10z is the answer
Explanation:
why is weather forecasting important to the people
Answer:
Weather forecasting is important to the people since it helps determine future climate expectations .
The equilibrium constant, Kc, is calculated using molar concentrations. For gaseous reactions another form of the equilibrium constant, Kp, is calculated from partial pressures instead of concentrations. These two equilibrium constants are related by the equation Kp=Kc(RT)Δn where R=0.08206 L⋅atm/(K⋅mol), T is the absolute temperature, and Δn is the change in the number of moles of gas (sum moles products - sum moles reactants). For example, consider the reaction N2(g)+3H2(g)⇌2NH3(g) for which Δn=2−(1+3)=−2. Part A For the reaction 2A(g)+3B(g)⇌C(g) Kc = 63.2 at a temperature of 81 ∘C . Calculate the value of Kp. Express your answer numerically.
Answer:
Kp = 1.41 x 10⁻⁶
Explanation:
We have the chemical equation:
2 A(g) + 3 B(g)⇌ C(g)
In which A and B are the reactants and C is the product. We calculate first the change in the number of moles of gas (Δn or dn):
dn= (sum moles products - sum moles reactants)
= (moles C - (moles A + moles B))
= (1 - (2+3))
= 1 - 5
= -4
We have also the following data:
Kc = 63.2
T= 81∘C + 273 = 354 K
R = 0.082 L.atm/K.mol (it is a constant)
Thus, we introduce the data in the mathematical expression for the relation between Kp and Kc:
[tex]Kc = (RT)^{dn}[/tex]= (0.082 L.atm/K.mol x 354 K)⁻⁴ = 1.41 x 10⁻⁶
species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. which pf the following best explains this difference
A: Bacteria reproduce more rapidly, allowing species to evolve more quickly
B:Bacterial populations are more isolated, permitting increases in genetic variability
C:certain bacteria grow more steadily over time, giving an evolutionary advantage over mammals
D: Individual bacteria have the same genes, providing opportunities for increased biodiversity in one population.
Answer:A
Explanation:
Species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. Bacteria reproduce more rapidly, allowing species to evolve more quickly best explains this difference. Therefore, option A is correct.
What allows bacteria to evolve so quickly ?Bacterial species evolve quickly because of their large populations, which provide numerous opportunities for mutations, and because they readily exchange genetic information, even between species. Some of this genetic diversity influences drug sensitivity or resistance, providing material for Darwinian selection.
Bacteria are among the world's fastest reproducing organisms, doubling every 4 to 20 minutes. Some pathogenic strains of E. coli grow quickly.
Bacterial populations evolve antibiotic resistance so quickly due to their fast generation times, large population sizes, and unique gene acquisition methods. These are some of the reasons bacteria have been so successful in evolution.
Thus, option A is correct.
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PLEASE HELP ME ASAP AND DONT GUESSSS!!!!!!!
Answer:
Digestive
Explanation:
It is necessary for the body to function so it is technically an organ
Answer:
[tex]Question ...4 : D[/tex]
[tex]Question...5: B[/tex]
Explanation:
Hope this helps
Have a nice day
Diffusion is the movement of water between the cell membrane.
O True
O False
it is true good friend chip chip cherrio
Which of these items is made up of one or more molecules?
Gold
Hydrogen
Salt
Neon
The item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
What is a Molecule?A molecule may be defined as a group of one or more atoms that are held together by numerous chemical bonds. It is the smallest particle of a substance that has all sorts of physical and chemical properties of that substance.
Among the given options, gold and neon are the elements, while salt is a compound. Hydrogen is a gas of diatomic molecules bearing the formula H2. It is colorless, tasteless, odorless, non-toxic, and highly combustible. Hydrogen in its molecular form is more common.
A hydrogen molecule is one of the simplest possible molecules which significantly consists of two protons and two electrons. These protons and electrons are remarkably held together by electrostatic forces.
Therefore, the item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
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Bobota
Level 1
Q2
What is the ability of a substance to
burn or ignite, causing fire or combustion?
DANGER
A. Chemical stability
B Reactivity
C Flammability
D. Conductivity
Answer:
chemical stability
Explanation:
g goodnight
How does the reactivity of nonmetals change as you move from left to right across the periodic table?
Answer:
Metallic character refers to the level of reactivity of a metal. Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.
Explanation:
I hope this helps :)
Answer:
Explanation:
Non metals increases in reactivity!
A barometer is used to measure air pressure.
Please select the best answer from the choices provided
Т
F
Why do materials interact to light differently?
Answer:
Refracted (refraction) – the bending of transmitted light as it travels across the boundary of one material into another material in which it's speed is different. Unlike diffraction, this change in direction of light occurs because light is changing its speed in the different substances in it traveling in.
Explanation:
Hope it helps
A two metal alloy is 85% iron by mass. How many grams of manganese are found in a 36 gram sample of the alloy?
Answer:
5.4g
Explanation:
Metal Alloy = Iron + Manganese
Composition of Iron = 85%
Mass of Alloy = 36 g
Mass of Iron = 85/100 * 36 = 30.6g
Mass of Manganese = Mass of Metal Alloy - Mass of Iron
Mass of Manganese = 36g - 30.6 g = 5.4g
Which gas will have the least collisions between its particles?
A. Helium at 20 C
B. Oxygen at -45 C
C. Carbon dioxide at 80 C
D. Argon at 265 K
The gas that has the least collisions between its particle is helium at 20° C. The correct option is A.
What is collision?Collision is a term used when two particles or object collides or clash and there is an exchange or transformation of energy between them. When a collision happens, the force is exerted on each other.
Helium is the second most abundant element present in the atmosphere. It is the lightest gas and its particle collides when there is an increase in the temperature.
Thus, the correct option is A. Helium at 20° C., regarding the collision of particles between its particles.
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If the percent yield for the following reaction is 65.0%, and 30.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq), are produced?
3 NO2(aq) + H2O(l) --> 2 HNO3 (aq) + NO (g)
Answer:
17.8 grams HNO₃
Explanation:
Given: 3NO₂(g) + 2H₂O(l) => 2HNO₃ + NO
30.0g/46g/mol 2/3(0.652mol)
= 0.652mol = 0.435mol (theoretical)
actual yield (65.0%) = 0.65(0.435mol) = 0.283mol(63g/mol) = 17.8 grams HNO₃
You have a container which has the capacity to hold 3 L water. If it already has 2.25 L water in it, how much more water in mL can you still add to fill it completely?
What is the first step in this
experiment?
Answer: Cut the card borad
Explanation:
Four stereoisomers exist for 4-hexen-3-ol. Draw the structure of the isomer that has the Z configuration around the double bond and the R configuration at the chiral center.
Answer:
Following are the solution to the given question:
Explanation:
Please find the complete question and its graph file in the attachment file.
The isomer having Z specification from around dual connector as well as the chiral center S structure is:
[tex](3S,4Z)-4-Hexen-3-ol[/tex]
An 'H' atom has been at the level of 3rd carbon, and we need to change its configuration, through 'R' to 'S' by CIP notation (under contrast to -OH group).
Answer:
The double bond can have either the E or the Z configuration.
Each of these stereoisomers can exist in either the R or the S configuration at the chiral center for a total of four possible stereoisomers.
Which describes the proper way to use an eye wash station?
Keep your contact lenses in place.
Press on your eyelids firmly.
Rinse your eyes for fifteen minutes.
Call the paramedics for instructions.
Answer:
C
Explanation:
Rinsing your eyes thoroughly is the proper way to was your eyes out.
1. Take your contacts out as they can get stuck in your eye.
2. Don’t press on your eyes as you will just rub in the chemical substance more.
3. Can’t call the paramedics as you should rinse your eyes immediately.
What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?
The physical property that is characteristic of all of the elements in the group located in the rightmost column of the periodic table is the gaseous state at room temperature.
What are Physical properties?Physical properties may be defined as those properties of matter that do not involves any chemical manifestation or appearance within the element. These properties are measurable and state the alteration between momentary states. Some examples of physical properties are as follows:
Physical appearance or color.Hardness of elementDensity.Melting and boiling points.Electrical conductivity.The groups located in the rightmost column of the periodic table are known as the halogens and the noble gases. These elements are typically gaseous in phase at room temperature. Apart from this, halogens also have high electronegativities because these elements have seven electrons in their valence electrons.
Therefore, the gaseous state at room temperature is the physical property that is characteristic of all of the elements in the group located in the rightmost column of the periodic table.
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When a solid turns into a liquid what is happening to the relationship between the forces?
Pleaseeeee guysssss
Explain Which enthalpy diagram shows that the reaction above is an exothermic reaction that produces -550 kJ of heat? Why? The
Answer:
no answer of this question
Please help me thanks:)
Answer:
where it goes
Explanation:
Answer:
I didn't do the observation that the question said so I can't help sorry
name this structure
Answer:
The fourth one- bromo trifluoro methane
Explanation:
Answer:
D
Explanation:
I believe the answer is the 4th option, bromo-trifluoro-methane
A 0.00215-g sample of polystyrene, a polymer composed of carbon and hydrogen, produced 0.00726 g of CO2 and 0.00148 g of H2O in a combustion analysis. What is the empirical formula for polystyrene?
Answer:
CH
Explanation:
Polystyrene is composed only by C and H.
We can calculate the number of C moles contained in the original sample mass (0.00215 g), using the produced mass of CO₂:
0.00726 g CO₂ ÷ 44 g/mol = 1.65x10⁻⁴ mol CO₂As 1.65x10⁻⁴ moles of CO₂ were produced, in the polystyrene sample there were 1.65x10⁻⁴ moles of C.
Now we calculate how many moles of H₂O were produced:
0.00148 g H₂O ÷ 18 g/mol = 8.22x10⁻⁵ mol H₂OThe number of H moles produced is double the amount of H₂O moles, so in the polystyrene sample there were 1.64x10⁻⁴ moles of H.
The number of C and H moles are the same, this means the empirical formula is CH.