As the names suggest, a physical change affects a substance's physical properties, and a chemical change affects its chemical properties. Many physical changes are reversible (such as heating and cooling), whereas chemical changes are often irreversible or only reversible with an additional chemical change.
(hope this helps ^^)
The chlorophyll processes the ingredients to make
(plant food) and
The chlorophyll processes the ingredients to make
(plant food) and
Answer:
oxygen
Explanation:
What pressure, in atmospheres, is exerted by 0.325 mol of hydrogen gas in a 4.08 L container at 35*C?
Answer: 2.0 atm
Explanation:
PV = nRT
P- the pressure of the gas
V- the volume it occupies
n- the number of moles of gas
R- the universal gas content
T- the absolute temp. of the gas
The pressure, in atmospheres, is exerted by 0.325 mol of hydrogen gas in a 4.08 L container at 35°C is 7.03atm.
What is ideal gas equation?The ideal gas law relates the pressure, volume, temperature, and number of moles of a gas through the equation:
PV = nRT
where P is the pressure in atmospheres, V is the volume in liters (L), n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin (K).
T = 35°C + 273.15 = 308.15 K
Substituting the given values into the ideal gas law equation, we get:
P × 4.08 L = 0.325 mol × 0.08206 × 308.15 K
Simplifying and solving for P, we get:
P = (0.325 mol × 0.08206× 308.15 K) / 4.08 L
P = 7.03 atm
Thus, the pressure exerted by 0.325 mol of hydrogen gas in a 4.08 L container at 35°C is 7.03 atm.
To learn more about the ideal gas equation, follow the link:
https://brainly.com/question/28837405
#SPJ3
What is the relationship between the circulatory and respiratory systems?
A. They work together to store the waste that blood collects from the body.
B. The circulatory system provides oxygen that the respiratory system uses to fill the lungs
C. The respiratory system provides blood that the circulatory system uses to transport nutrients.
D. They work together to supply oxygen to tissues and rid the body of carbon dioxide
Answer:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart
Explanation:
This should help you out
write down the cell equation. please
Answer:
see explanation
Explanation:
symbiology is (oxidation rxn || reduction rxn)
=> Zn°|Zn⁺² || Cu⁺²|Cu° => Zn°(s) + Cu⁺²(aq) => Zn⁺²(aq) + Cu°(s)
Plz help!
What must change in order to change the amount of power?
Answer:
Mass
Explanation:
how dose the scientist know the substances goes through a change of state during the time period labeled B on the graph?
Answer:
The temperature remains constant
Explanation:
In a plot of temperature against time, it is easy to spot the points on the graph where a change of state is taking place.
During a change of state, the temperature does not not change with time. These are points that are plateaus on the temperature-time graph.
This is because, during phase change, the heat that is added is used in breaking intermolecular forces therefore a temperature change is not observed until the phase change is complete.
How many atoms of aluminum (Al) are in 3.94 mol of aluminum
Answer:
26.9
Explanation:
that is my answer I try to it
hi !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Hahaha hey! What’s up!
Which of the following elements can form a covalent (molecular) bond with nitrogen?
A. Oxygen
B. Magnesium
C. Sodium
D. Neon
Oxygen can form a covalent (molecular) bond with nitrogen. Hence, option A is correct.
What is a covalent bond?A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.
Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell.
Nitrogen atoms will form three covalent bonds (also called triple covalent) between two atoms of nitrogen because each nitrogen atom needs three electrons to fill its outermost shell.
Hence, option A is correct.
Learn more about the covalent bond here:
https://brainly.com/question/12661797
#SPJ2
Which of these equations is balanced?
1. 4Sb + 3O2 → Sb4O6
2. H3 AsO4 → As2O5 + H2O
3. SiO2 + HF → SiF4 + H2O
4. CO2 + NH3 → CO(NH2)2 + H2O
Answer:
the first is the answer
what information do the coefficients of a balanced equation give about the reactants
What voltage will produce 3 A through a circuit that has 15
ohms of resistance?
Answer:
5 ohms of resistance
Explanation:
15/3=5
What is the density of Iodine gas at 2.36 atm and 65.0 °C?
A) 0.026 g/L
B) 0.046 g/L
C) 21.6 g/L
D) 38.3 g/L
Answer:
C
Explanation:
The gas equation can be written as PV = nRT, where
T is in kelvin, so 65 + 273 = 338K
P = 2.36 atm
Mass of Iodine gas = 254 g
R = 0.0821 (gas constant)
So,
P = (2.36*254)/(0.0821*338) = 21.63 g/L
"The density of iodine gas at 2.36 atm and 65.0 °C is 21.63 g/L."
What is density?
A substance's density will be its mass per unit volume. The most common symbol for density is D.
The formula of density can be written as:
D= P×MW/RT
where, P is pressure, MW is molecular weight( MW of iodine is 254) and R is gas constant( 0.082).
Now, put the value of given data in above equation.
D= 2.36×254/0.082×338= 21.63 g/L.
To know more about density click here.
https://brainly.com/question/3074403.
#SPJ2
Why are prefixes not needed in naming ionic compounds?
Answer:
its A
Explanation:
Answer:
C. Ions combine in only one ratio
Explanation:
Just took the quiz
URGENT !! PLEASE ANSWER !!
Is C-O a nonpolar or polar covalent bond? why?
explain what happens during the chemical reaction
CaCO3 -> CaO + CO2
check out this article i found it very helpful,
I couldn't find the answer to your question.
which description shows copper at rtp?
Answer:
It is malleable, ductile, and an extremely good conductor of both heat and electricity. It is softer than zinc and can be polished to a bright finish. It is found in group Ib of the periodic table, together with silver and gold. Copper has low chemical reactivity.
35.46 g silver nitrate reacts with 52.61 g sodium chloride to produce silver chloride and sodium nitrate.
How much silver chloride solid will be produced?
Here are the steps hope it helps
Which of the following groups of elements has two valence electrons and is highly reactive?
Select one:
a. Alkali metals
b. Alkaline-earth metals
c. Halogens
d. Noble gases
true or false? no atoms are gained or lost in a chemical reaction
Answer: this is true
The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. Therefore, the given statement is true.
What is law of conservation of mass?
According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier. Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved.
According to this law, the number and types of atoms on reactant and product side is same. The statement " no atoms are gained or lost in a chemical reaction" is very much correct.
Therefore, the given statement is true.
To know more about law of conservation of mass, here:
https://brainly.com/question/28711001
#SPJ2
Iron is more reactive than copper. Write an activity to show this. Write word equation of the reaction involved.
Answer:
This can be proved by the following activity: Take some Iron fillings and dip them in the Copper sulphate solution. After some time you will notice that there is a colour change in the solution which is caused due to the displacement of Copper from it solution.
Explanation:
As the radius of a star increases, how do you think its luminosity might change?
Answer:
As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off.
Look at position 2 on the roller coaster
Is there more potential or kinetic energy , why ?
Which element’s atoms have the greatest average number of neutrons?
Answer:
53
Explanation:
the atomic number is 53, then Number of neutrons=127-53=74 Since, the number of neutrons are large in Tellurium, therefore Tellurium have the greatest average number of neutrons.
explain why the weight of an object changes if taken to the moon but not its mass
Answer:
Because the gravitational force alters
Explanation:
Define symbol ..........
Answer:
Hey mate here's your answer ⤵️
a mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.
Hope it was helpfulllnoun: letter, character, sign of written communication
Something used for or regarded as representing something else; a material object representing something,
or a character of some kind
Example:
Often something immaterial; emblem, token, or sign: "$"<< the dollar sign is a symbol used to show / means money
Hope this kinda helped
Giving brainliest !!!
Answer:
a and i thinkc
Explanation:
what are the materials needed during photosynthesis?
When are kids ready to assume adult responsibilities?
Answer:
18 years old or when they become mature.
Explanation:
Long form EC for Aluminum