What is the pressure in kPa of 2 moles of chlorine gas at a temperature of 5 degrees C
and a volume of 8 dm3?
Answer:
[tex]P=5.8x10^2kPa[/tex]
Explanation:
Hello.
In this case, since chlorine gas is assumed to behave ideally, we can use the ideal gas equation in order to compute the required pressure:
[tex]PV=nRT[/tex]
In such a way, since the temperature must be in kelvins and the volume in liters for the universal gas constant:
[tex]T=5+273.15=278.15K\\\\V=8dm^3*\frac{1L}{1dm^3}=8L[/tex]
Thus, we first compute the pressure in atm:
[tex]P=\frac{nRT}{V}= \frac{2mol*0.082\frac{atm*L}{mol*K}*278.15K}{8L}\\\\P=5.7atm[/tex]
Thus, the pressure in kPa turns out:
[tex]P=5.7atm*\frac{101.325kPa}{1atm}\\\\P=5.8x10^2kPa[/tex]
What is the density of a 30 g solid with a volume of 20 cm^3?
Answer:11.35 g/cm 3
Explanation:
Length
= 2.0 dm = 20 cm
Breadth
= 8.0 cm
Height
= 35 mm = 3.5 cm
Volume of block
V = ℓ ⋅ b ⋅ h = 20 cm × 8.0 cm × 3.5 cm = 560 cm
3
Density of lead is
Density
=
Mass
Volume
=
6356 g
560 cm
3
=
11.35 g/cm
3
Explanation:
A gas in a large syringe has a volume of 300ml at 45°C. The temperature is lowered to 30°C. What is the new volume of the gas in the syringe? (N and p are constant). Hint:Convert temperature to kelvin before calculating (°C+273=K)
Answer:
V1=300ml
V2= x ml
T1= 45 Celsius
T2= 30 celcius
Do the math....
you will get
318x=90900
divide by 318
x=285.8 ml (rounded)
Explanation:
you have to add 45 and 30 (separately because the temp. has to be in kelvin) to 273... so V2 equals 2858.8 ml
Hope is testing a substance using blue litmus paper. The paper turns red. The substance is _____.
a neutral
an acid
a base
Answer:
the substance is an acid
How could the continents have gotten so far apart and how long did it take for this to happen
Please help if you can !
Answer:
7630
Explanation:
eAnswer:
Explanation:
Math
Mintu wants to increase the heat transfer between a metal iron and another piece of metal he wants to shape. He decides to increase the time the two metals are in contact, use a larger metal iron, and use a new metal material with a higher specific heat.
Where is Mintu's error?
Answer:
Mintu should chosen a material with a lower specific heat
Explanation:
I got the answer right on the test trust me it is correct
What do organs combine to form? organ systems cells tissues organisms
Answer:
the answer is {organisms}
Answer:
organisms
Explanation: I took the test
Are you a fire alarm? Cause you're loud and annoying
Answer:
yaaaaa babdbabaaaa lolll
Explanation:
1. What does the rule of law mean?
2. How does the rule of law protect Citizen?
3. How does the rule of law impact lawmakers and courts?
Answer:
I answer this one before
Explanation:
right
Answer:
1. A principle under which all persons, institutions, and entities are accountable to laws that are: Publicly promulgated. Equally enforced. Independently adjudicated. And consistent with international human rights principles.
2. The laws are clear, publicized, and stable; are applied evenly; and protect fundamental rights, including the security of persons and contract, property, and human rights. The processes by which the laws are enacted, administered, and enforced are accessible, fair, and efficient.
3. It codifies the core values of the people. Courts have the responsibility to interpret the Constitution's meaning, as well as the meaning of any laws passed by Congress. Everything they do must be based on the law, and they are accountable for their decisions. That means officials are held responsible for the choices they make.
What do we mean when we say a substance is "pure"?
Answer:
A pure substance is a substance that is only made up of atoms of one element and so it has fixed melting and boiling points.
Aspirin is not as____
in water as sugar is.
Answer:Soluble
Explanation:Soluble:(of a substance) able to be dissolved, especially in water.
Each axis on a graph should be:
equal
O numbered
Olabeled
vertical
What is the atomic number of an atom?
Answer:
The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
Explanation:
The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
Explanation:
The atomic number is number on the right side
Molecules such as water that are electrically neutral overall but still have partially charged regions are referred to as?
A. Covalently charged
B. Ions
C. Electrolytes
D. Isotopes
E. Polar molecules
Answer:
B
Explanation:
I studied this and had a test
One of the physical properties of bases is that they ____.
Question 17 options:
taste sour
feel slippery
crumble
corrode metal
Answer:
feel slippery
Explanation:they physical properties are due to its slippery nature when touched
In the reaction Zn H 2SO 4→ ZNSO4 + H2, which, if any element is oxidized
Answer:
I hope this answer is correct
Explanation:
This is an oxidation-reduction (redox) reaction:
Zn0 - 2 e- → ZnII (oxidation)
2 HI + 2 e- → 2 H0 (reduction)
Zn is a reducing agent, H2SO4 is an oxidizing agent.
Reactants:
Zn
Names: Zinc source: wikidata, accessed: 2019-09-07, Zinc powder (pyrophoric) source: ICSC, accessed: 2019-09-04, Zn source: wikidata, accessed: 2019-09-07
Appearance: Grey-to-blue powder source: ICSC, accessed: 2019-09-04
H2SO4 – Sulfuric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02
Other names: Oil of vitriol source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Sulfuric acid, concentrated (> 51% and < 100%) source: ICSC, accessed: 2019-09-04, H2SO4 source: wikidata, accessed: 2019-09-07
Appearance: Clear, colorless liquid source: wikipedia, accessed: 2019-09-27; Odourless colourless oily hygroscopic liquid source: ICSC, accessed: 2019-09-04; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02
Products:
ZnSO4 – Zinc sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
Other names: White vitriol source: wikipedia, accessed: 2019-09-27, Goslarite source: wikipedia, accessed: 2019-09-27, Zinc sulfate (1:1) source: wikidata, accessed: 2019-09-02
Appearance: White powder source: wikipedia, accessed: 2019-09-27; Colourless hygroscopic crystals source: ICSC, accessed: 2019-09-04
H2
Names: Dihydrogen source: wikidata, accessed: 2019-09-07, Hydrogen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, H2 source: wikidata, accessed: 2019-09-07
How long does primary succession take? ty sm ily
Juan fills two separate beakers with boiling water. The first beaker holds 500 mL. The second beaker only holds 75 mL. Juan then measures the temperature of both beakers and calculates how long it takes the water in each beaker to reach room temperature. Which of the following is true?
Answer:
The water in the 75 mL beaker will cool down more rapidly then the water in the 500 mL beaker.
Explanation:
The scale of an object influences the object's properties. For example, the water in a small beaker loses heat more rapidly than the water in a large beaker. This is because heat loss decreases as volume increases. As the scale of a beaker increases, its volume increases. Therefore, the larger the beaker, the slower the water inside the beaker will cool.
Calculate the number of moles in 144 g of P.
If a chemical reaction leaves you with a new
substance, what do you
think a physical
change/reaction will be?
Answer:
Explanation:
During a physical temperature change, one substance, such as water will be heated. Because one compound is mixed in with another. Therefore, these reactants produce a product. When the reactants are mixed, the temperature change caused by the reaction is an indicator of a chemical change.
Ionic crystals have high boiling points because:
A. They do not have high boiling points.
B. breaking ionic bonds requires a large amount of energy.
C. the structure has a large surface area to absorb heat quickly.
D. the positive and negative charges prevent them from absorbing heat quickly.
The answer would be B.
her Children to
She
School
o didn't took
o taked
o took
PLEASE HELP!!!!!
What happens to the transfer of thermal energy when thermal equilibrium is reached?
Answer:
During the process of reaching thermal equilibrium heat is transferred between the object. heat is always transferred from the object at the higher temperature to the object with lower temperature. For a gas, the heat transfer is related to a change in temperature.
The size or strength of something, like a force.
Velocity
Acceleration
Magnitude
Direction
The size or strength of something like a force is acceleration. Thus, option b is correct.
What is force?
In general language we can say that push or pull is called force.
According,to newton second law of motion force is rate change of momentum it means
F= d/dt×(mxv)
Where m is mass and v is velocity
But in general case mass is constant.
So ,Force
F= mxd/dt×(v)
Since we know that rate change of velocity is acceleration.
Then we can say that
F= mass x acceleration
S.I unit of force is Newton
1 Newton = 1kg×m/sec^2.
Force and acceleration is a physical quantity which have both i.e magnitude and direct it means both are vector quantity. According,to newton second law of motion force is rate change of momentum it means
F= d/dt×(mxv)
Therefore, the size or strength of something like a force is acceleration. Thus, option b is correct.
Learn more about acceleration here:
https://brainly.com/question/12550364
#SPJ6
Kinds of matter with label and example
Answer:
Liquid: water
Solid: Rocks
Gas: Air
Explanation:
A hot pot with a closed lid is placed on a table. Something is placed in between the pot and the table to protect the table from heat. Why does the table need protection from heat?
26. A hot pot with a closed lid is placed on a table. Something is placed in between the pot and the table to protect the table from heat.
Question options:
The pot is an isolated system, heat and energy cannot escape
The pot is an open system, heat and matter can enter and leave the pot
The pot is an open system, heat can escape but matter cannot
The pot is a closed system, heat can escape but matter cannot
Answer:
The pot is a closed system heat can escape, but matter cannot
Explanation:
5. The sphere shown below is placed in a full overflow cup and sinks to the bottom. How much water is displaced by the sphere?
4.6 cm
O A. 51.0 ml
OB. 66.5 ml
O C. 88.6 mL
O D.407.7 ml
Answer : The correct option is (A) 51.0 mL
Explanation :
As we know that water displaced is equal to the volume of sphere.
Now we have to determine the volume of sphere.
Formula used:
Volume of sphere = [tex]\frac{4}{3}\pi r^3[/tex]
where,
r = radius of sphere
Given:
Diameter of sphere = 4.6 cm
Radius of sphere = [tex]\frac{Diameter}{2}=\frac{4.6cm}{2}=2.3cm[/tex]
So,
Volume of sphere = [tex]\frac{4}{3}\times 3.14\times (2.3cm)^3[/tex]
Volume of sphere = [tex]50.94cm^3\approx 51.0 cm^3[/tex]
Water displaced = Volume of sphere = [tex]51.0 cm^3[/tex]
We know that:
[tex]1cm^3=1mL[/tex]
So,
Water displaced = 51.0 mL
Therefore, the correct option is (A) 51.0 mL
Answer:
A. 51.0 mL
Explanation:
i did this question in my quiz :)
What are the basic building blocks of proteins?
OA
starches
OB. electrolytes
Ос.
amino acids
OD
polyunsaturated fats
Answer:
Amino Acids
Explanation:
What Are Proteins Made Of? The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain.
Answer:
Amino Acids
Explanation:
Which sample of matter can be separated into different substances by physical means
Answer:
a heterogeneous mixture
Explanation:
an example would be sand and water because it can be filtered which is a physical mean of separation.
Answer:
Heterogeneous mixtures
Explanation:
It is composed of two or more types of matter that can be present in varying amounts and can be separated by physical means. Heterogeneous mixtures vary in composition from point to point; homogeneous mixtures have the same composition from point to point.
