Answer:
4.92L
Explanation:
Given parameters:
Initial pressure = 891mmHg
Initial temperature = 84°C = 84 + 273 = 357k
Initial volume = 5.61L
New temperature = 40°C = 273 + 40 = 313k
Unknown:
New volume = ?
Solution:
Since we are dealing with constant pressure condition, we apply charles's law.
It states that the volume of a fixed mass of gas varies directly as its absolute temperature if the pressure is constant.
Mathematically ;
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
V1 is the initial volume V2 is the new volume
T1 is the initial temperature T2 is the new temperature
[tex]\frac{5.61}{357}[/tex] = [tex]\frac{V2}{313}[/tex]
V2 = 4.92L
Which of the following is a polar molecule?
A. A linear Carbon dioxide molecule (C02)
B. A carbon monoxide molecule (CO)
C. A calcium oxide molecule (CaO)
D. An oxygen molecule (02)
Answer:
B. A carbon monoxide molecule(CO)
Explanation:
CO is polar because oxygen is more electronegative than carbon, so it gives oxygen a partial negative charge and carbon and partial positive charge. This causes a net dipole moment. CO2 is linear with no net dipole moment because each C-O bond is equal and opposite to each other, so they equal 0, which makes them non polar.
what two types of evidence are used to classify organisms. Which animal shares the most traits with humans and do both lemurs and humans have the trait listed at Point D explain?
Explanation:
6.The main pieces of evidence that scientists use to classify organisms are essentially form and evolutionary relationships.
9. chimpanzee
10. The answer is no, lemurs are not bipedal, i.e, they don't use two legs for walking like human do and they don't have language like ours.
CAN SOMEONE PLEASE TELL ME HOW DO I WRITE NITROGEN WITH THE "IDE" ENDING? PLEASE AND THANK YOU
Answer:
Nitride.
Explanation:
Have a good day, friend.
The chemical equation below shows the photosynthesis reaction.
6CO2 + 6H2O → C6H12O6 + 6O2
A reaction uses 528 g of CO2. How many grams of water are used in this reaction?
Answer:
12
Explanation:
jupiter is much more larger than earth , would gravity be weaker or stronger here?
Answer:
stronger
Explanation:
there is more gravity on Jupiter since it is bigger than earth
The percent composition of carbon in acrylonitrile is
a 5.690%
b 67.89%
С
47.90%
d 22.646%
Answer:
67.89
Explanation:it’s right
The percent composition of carbon in compound of acrylonitrile is 22.646%.
What is percent composition?Percent composition is defined as a convenient way to record concentration of solution.It is a expression which relates mass of element to mass of compound as,mass of element/mass of compound×100.
Percent composition helps in elemental analysis of compound which is useful in analysis of ores also. It helps in making solutions while performing the titrations. It helps in prediction of chemical formula which can be predicted by mass and molar mass of an element.
The compound acrylonitrile has a molar mass 53.06 g/mole and that of carbon is 12 g/mole thus, percent composition of carbon in compound of acrylonitrile is 12/53.06×100=22.646%.
Thus, the percent composition of carbon in compound of acrylonitrile is 22.646%.
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If the surroundings gain energy, then the system
energy. *
1 point
gained
produced
lost
destroyed
Answer:
Option C: Lost.
Explanation:
Lost is your answer.
Which element has the largest atom (longest atomic radius) and which element has the smallest atom (shortest atomic radius)?
Answer:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
3. The two main driving forces of the water cycle are the Sun and...
1 gravity
2 wind
3 volcanoes
4 rain
In an ionic compound, the negative and positive ions are held together by __________.
Answer:
the third one
Explanation:
A sample of pure radioactive isotope is left to decay. After 40.0 days, the 1 point
sample is placed in a mass spectrometer, and it is determined that only
25% of the original isotope remains. How long is the half-life?
Answer:
6 months and 1 day
Explanation:
Which of the following statements is true about the relationship between atoms and molecules? A. Most atoms are bonded together to make a molecule. B. An atom can be seen by scientists, but a molecule cannot. C. Atoms and molecules are the same and have no differences.
Answer:
I believe the answer is A. molecules are larger than atoms so they should be visible and atoms and molecules are indeed different
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the correct option is option A.
What is atom?
Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. Most atoms are bonded together to make a molecule. Molecules combine to form compounds.
Therefore, the correct option is option A.
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Balance the Chemical Equations
Rb + RbNO3---> Rb2O + N2
please help me
Answer:
10Rb° + 2RbNO₃ => 6Rb₂O + N₂
Explanation:
Given: Rb° + RbNO₃ => Rb₂O + N₂
=> 1st balance rubidium in RbNO₃ against Rb₂O by inserting a '2' coefficient before RbNO₃ and a '6' coefficient before Rb₂O
=> Rb° + 2RbNO₃ => 6Rb₂O + N₂ => Oxygen and Nitrogen are balanced. All that remains is balancing Rb by inserting a '10' coefficient.
=> 10Rb° + 2RbNO₃ => 6Rb₂O + N₂
Note: In balancing chemical equations, saving an element that is not part of a compound until last frequently gives balance by inspecting the number of elements of the specific kind and boosting its coefficient to balance the equation.
Balanced equation => 10Rb° + 2RbNO₃ => 6Rb₂O + N₂
The balanced chemical reaction can be of the equation given is [tex]2Rb + RbNO_3 - > Rb_2O + N_2[/tex].
We need to make sure that the amount of atoms of each element is the same on both sides of the equation in order to balance the chemical equation [tex]Rb + RbNO_3- > Rb_2O + N_2[/tex].
By counting the atoms in each element, we may begin to balance the equation. We have one Rb, one Rb, one N, and three O atoms on the left side. We have two Rb, one N, and two O atoms on the right side.
We can add a coefficient of 2 in front of [tex]RbNO_3[/tex] to balance the Rb atoms, which gives us:
[tex]2Rb + RbNO_3 - > Rb_2O + N_2[/tex]
Thus, now, the equation is balanced with two Rb atoms on both sides.
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1. Convert 76.19g of Rb3Rn to moles
a. 0.16 moles
b. 6.28 moles
c. 36,450.06 moles
Answer: C, 36,450.06 moles
Explanation:
Molar mass=478.41
17.19gx478.41moles=36,450.06
Question 1
Organisms sharing a common ancestor
Evolutionary history
A. Fossil record
B.Anatomy
C.Common ancestry
D.Evolution
Answer:
Fossil record
Explanation:
but first think about it befor you do so it could be wrong im not a computer
How many grams are in 0.133 moles of NH4CIO3?
Answer:
53.49146
Explanation:
Tamara pours hot tea into a cold mug. A few moments later, she picks up the mug, and it is now warm.
Answer:The Hot tea makes the mug a hot mug
Explanation:
Answer: The thermal (heat) energy in the tea, is being transferred to the mug
Can you help plzzz thank you
Answer:
It would be Container 3
Explanation:
Each of the containers has the same amount of salt. Salinity refers to salt level. Since the question is asking for the container with the greatest salinity, you are looking for the container with the least water (because it will be the saltiest out of all of them). Container 3 has the least water.
Hope this helps :)
3 has less water so its saltier
sound travel through water at a speed of 1500 m/s. if the frequency of a sound is 1000 Hz, what is the wavelength?
Answer:
λ = 1.5 m
Explanation:
Given data:
Speed of wave = 1500 m/s
Frequency of sound = 1000 Hz
Wavelength of sound = ?
Solution:
Speed of wave = frequency × wavelength
by putting values,
1500 m/s = 1000 Hz × λ
λ = 1500 m/s / 1000 s⁻¹ (Hz = s⁻¹ )
λ = 1.5 m
Answer: 1.5
Explanation:
Well first you do
1500/ 1000= 1.5 which mean
The wavelength is 1.5
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?
A The force of the air resistance on the moving hammer
B The force of the person using the hammer
C The force of gravity pulling down on the hammer
D The force of the nail pushing in the opposite direction
Answer:
A
Explanation:
In simple terms: Hammer goes one way, air goes the other way.
Answer:
d
Explanation:
i took the test
How many formula units are in 2.58 moles of Caci.?
Answer:
1.55 x 10²⁴ formula units
Explanation:
Given parameters:
Number of moles of CaCl₂ = 2.58moles
Unknown:
Formula units in the compound = ?
Solution:
To solve this problem, we must understand that;
1 mole of a substance contains 6.02 x 10²³ formula units
2.58 moles will contain 2.58 x 6.02 x 10²³ formula units
= 1.55 x 10²⁴ formula units
What would be the molar mass of sodium?
Answer:
Explanation: 29.99g/mol
Answer:
23.0 g/mol
Explanation:
To find the molar mass of sodium or Na, look at the periodic table.
Then try to find where sodium is.
After that, then try to check the atomic mass of sodium.
The atomic mass of sodium is 23.0
So the molar mass is 23.0 g/mol
That's it. Molar mass means the same thing as atomic mass.
Hope it helped!
1.Which group of numbers can divide 54 with no remainder?
A. 1, 2, 5, 7, 12,54
B. 1, 2, 6,9, 27,54
C. 2, 4, 6, 8, 26, 54
D. 1, 2, 7, 8, 29,54
Answer:
The answer is B. 1,2,6,9,27,54
Explanation:
An atom of cadmium that has 66 neutrons has a mass number of
Answer:
113
Explanation:
We are given that the atom of cadmium has 66 neutrons:
Number of neutrons in Cd = 66
Now;
Mass number = ?
The mass number of an element is the sum of the number of protons and number of neutrons
Mass number = number of protons + number of neutrons
By the position of cadmium, it has an atomic number of 47 and this is the number of protons
Mass number = 47 + 66 = 113
How do ocean currents affect the air temperature of Buenos Aires and Cape Town? this is for science
If 11 grams of a gas occupies 5.6 liters at STP, what is its gram molecular mass?
A) 11 g/mol B) 22 g/mol
C) 44 g/mol D) 88 g/mol
Answer:
(1) 25.0cal/g (2) 540cal/g (3) 327 cal/g (4) 8,180 cal/g 82 If 11 grams of a gas occupies 5.6 liters at STP, what is its gram molecular mass? (1) 11 g/mol (2) 22 g/mol
at stp what is the volume of 5.35 moles of methane ch4
Answer:
22.4 L
Explanation:
In which situation is the speed of the car constant while its velocity is changing?
A)
The car travels down a straight track at 30 m
s
m
B)
The car travels around a circular track at 30
S
The car begins from rest and accelerates to 20
S
D)
m
The car begins traveling at 30
m
and slows to 15
S
En
8 moles Cl to grams 3
Answer: I don’t understand what your asking elaborate more
Explanation:
(Help if you know) What is one way land helps reduce the force of a hurricane as it moves inland?
A) land stabilizes the sediment forced on shore
B) Land filters the water forced up from the sea by the wind
C) Land acts as a bumpy surface that absorbs wind power
D) land absorbs the rainwater