Answer: C, 36,450.06 moles
Explanation:
Molar mass=478.41
17.19gx478.41moles=36,450.06
Which of the following is an example of a chemical change?
A. Boiling water
B. Burning paper
C. Dissolving sugar in water
D. Melting gold
Answer:
b.) burning paper
Explanation:
3 reasons why aluminium is used in making of cooking vessels
Answer is : It is a good thermal and electrical conductor. -The main point to be noted is that aluminium is a highly reactive element and still it is used for making cooking utensils. The reason is that aluminium has a very high affinity for oxygen. So, it reacts with oxygen and forms a layer of aluminium oxide on its surface.
Answer:
This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide . This oxide layer is very stable and prevents further reaction of aluminium with oxygen . Also , it is light in weight and a good conductor of heat Hence , it is used to make cooking utensils .
Explanation:
Believe it
What are the eleven elements that are gas freezing?
hydrogen, helium, oxygen, nitrogen, argon, neon, fluorine, chlorine, krypton, xenon and radon i believe >__< not in any order ahaha
Answer:
hydrogen, helium, oxygen, nitrogen, argon and neon, fluorine, chlorine, krypton, xenon and radon
Explanation:
Please help due soon fill in the blanks will give brainliest
Answer:
Proton has positive charge (+) and located in nucleus
Electron has negative charge (-) and located in electron cloud
Neutron has neutral charge (0) and located in nucleus
help me please just w number 2&3
Answer:
2.No. because in an open system, gas will blow up & so, if it's measured, it won't have the equal amount of the reactant. But, if you arrange this reaction in a closed system, then it will be the same.
3.2SiO2+4Cl2= 2SiCl4+O2
Explanation:
How can calcium oxide change directly to limewater?
Wants equation and observation
Answer:
Lime(Calcium Oxide) is a white solid with strongly basic properties.Lime reacts readily with water to produce slaked lime,which is the chemical compound calcium hydroxide.....
When carbon dioxide gas is passed through or over limewater,it turns milky due to the formation of calcium carbonate.
Balance the following chemical equation by providing the correct coefficients.
Na + H2O ———— NaOH+H2
Please help!!!!!!!!
Answer:
2, 2, 2, and 1
Explanation:
I put that in and it was correct.
3. The two main driving forces of the water cycle are the Sun and...
1 gravity
2 wind
3 volcanoes
4 rain
what is the chemical formula for Sulphate...
Answer:
SO4²
Explanation:
Formula and structure: The sulfate ion formula is SO42- and the molar mass is 96.06 g mol-1. This salt is formed by one sulfate center to which 4 atoms of oxygen are attached, 2 of these atoms are forming S=O.
Answer:
[tex]so _{4} ^{2 - } [/tex]
Explanation:
sulfate is consisting of sulfur element with 4 oxygen as the structure in the pic given and this group is 2- charged
How many atoms of Oxygen are in 2.35 grams of SO2?
Answer:
There are 2 atoms of Oxygen (O) present in SO2 therefore it's atomicity is 2
Which reaction will proceed most quickly or be the easiest?
A. Li and F
B. Li and CI
C. Nah and F
D. Na and CI
Answer:
C. Na and F
Explanation:
The reaction between Sodium and fluorine will proceed more quickly and easily of all the given reaction choices.
This is because fluorine is the most electronegative element and sodium is more electropositive when compared to Lithium.
This significantly large electronegativity difference between the atoms confers a high reactivity on both of them. In this reaction, an ionic bond forms by the virtue of sodium losing one electron to be gained by fluorine. This way both atoms becomes isoelectronic with Neon.A closed container is the best way to measure the volume of a
A. gas
B. liquid
C. solid
D. Both A and B are correct.
Answer:
A closed container is the best way to measure the volume of a liquid
Which element has the following complete electron configuration : 1s22s22p63s23p64s23d5?
Answer:
Manganese
Explanation:
The electronic configuration of the atom is:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
The powers in this configuration is the number of electrons in each orbital:
2 + 2 + 6 + 2 + 6 + 2 + 5 = 25
The compound has 25 electrons and it is Manganese
The electron configuration 1s22s22p63s23p64s23d5 corresponds to the element manganese (Mn).
In the electron configuration provided:
1s2 represents the filling of the 1s subshell with two electrons.
2s2 represents the filling of the 2s subshell with two electrons.
2p6 represents the filling of the 2p subshell with six electrons.
3s2 represents the filling of the 3s subshell with two electrons.
3p6 represents the filling of the 3p subshell with six electrons.
4s2 represents the filling of the 4s subshell with two electrons.
3d5 represents the filling of the 3d subshell with five electrons.
Based on this electron configuration, we can correctly identify the element as manganese (Mn), which has an atomic number of 25.
Know more about electron configuration:
https://brainly.com/question/29157546
#SPJ6
What is a lone pair?
A. Two pairs of electrons that form a double bond
B. Two atoms that have been pushed close to each other
C. A pair of electrons that is not used in bonding
D. A diatomic molecule attracted to no other molecule
Answer:
I BELIEVE IT is c.
Explanation:
Now you will focus on a second hypothesis. This hypothesis can be very similar to the first, but this time you want to focus only on the second variable in question, speed. What could be a hypothesis that would illustrate the relationship between speed and kinetic energy? Use the format of "if…then…because…” when writing your hypothesis.
Answer:
If the mass of an object increases, then its kinetic energy will increase proportionally because mass and kinetic energy have a linear relationship when graphed.
Explanation:
is correct answer
Answer:
Sample Response: If the speed of an object increases, then its kinetic energy will increase proportionally because speed and kinetic energy have a linear relationship when graphed.
Explanation:
6/14and3/7 answer 6/11and9/16answer 5:6=10:12answer
your question was incomplete.............. you haven't mentioned any required information
Which equation is balanced in an acidic solution?
Answer:
I think C but it could be D
Explanation:
I would say go for C
If a sample of gas of valume 605 mL and temperature of 39 OC, has 0,00803 moles. What is it’s pressure?
Answer: The pressure of the gas is 0.34 atm
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = ?
V = Volume of gas = 605 ml = 0.605 L (1L=1000ml)
n = number of moles = 0.00803
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]39^0C=(39+273)K=312K[/tex]
[tex]P=\frac{nRT}{V}[/tex]
[tex]P=\frac{0.00803\times 0.0821 L atm/K mol\times 312K}{0.605L}=0.34atm[/tex]
The pressure of the gas is 0.34 atm
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
What does the salinity of seawater represent?
The concentration of salt dissolve in the ocean
The concentration of all dissolved chemicals in the ocean
The volume of salt in the ocean
the mass of salt in the ocean
Answer:
Salinity is a measure of the 'saltiness' of seawater, or more precisely the amount of dissolved matter within seawater.
How would you find the average speed of a marathon runner throughout an entire race? A Divide the total distance the runner travelled by the total time they took to travel that distance B Divide the total time the runner it took the runner to travel that distance by the the total distance they travelled C Multiply the total distance the runner travelled by the total time they took to travel that distance D Multiply the total time the runner it took the runner to travel that distance by the the total distnace they travelled
Answer:
distance divided by time so A
Explanation:
Which substance has a melting point greater than room temperature
O A. argon
O B. oxygen
O
C. mercury
O D. aluminum
Aluminum is solid at room temperature and will, therefore, have a melting point that is above room temperature.
Melting pointThe room temperature is about 25 degrees Celsius.
Argon and oxygen are gases at room temperature.
Mercury is a liquid at room temperature.
Aluminum, on the other hand, is solid at room temperature. Hence, its melting point is definitely somewhere above room temperature.
More on melting points can be found here: https://brainly.com/question/25777663
In general, what happens to atoms when they are exposed to extreme temperatures?
Answer:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.\
so hope that helps and sooooo
Answer:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.
How many atoms of beryllium are equal to 0.39 moles of beryllium?
Answer:
2.35 x 10²³atoms
Explanation:
Given parameters:
Number of moles of Be = 0.39moles
Unknown:
Number of atoms = ?
Solution:
To solve this problem:
1 mole of a substance contains 6.02 x 10²³ atoms
0.39 mole of Be will contain 0.39 x 6.02 x 10²³ = 2.35 x 10²³atoms
What patterns do you notice between the three maps? Using the concepts
you've learned in this lesson, construct an explanation for these patterns in your
Science Notebook or in the space below.
Answer:
A spatial pattern is a perceptual structure, placement, or arrangement of objects on Earth. It also includes the space in between those objects. Patterns may be recognized because of their arrangement; maybe in a line or by a clustering of points.
Explanation:
Cu(NO3)2 is what compound?
Answer:
the compound's name is copper nitrate
A student claims that a large percentage of water on Earth is immediately available to drink. Is he correct? Why or why not?
Answer:
No, the student is not correct. The earth may have a lot of water... but not every part of water is drinkable. Most water is filled with bacteria and or viruses making it not suitable to drink! :)
Explanation:
HOPE THIS HELPS! BRAINLIEST? :)
Making Sense
1. School bus drivers are extra careful when they cross railroad tracks. They stop before they cross railroad tracks to be sure that there is no
train coming. Yet, trains typically move more slowly through towns than cars do. If trains usually move more slowly than cars, why can
they do more damage if they hit something in their path?
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2
11
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1
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III
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III
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Saved January 15, 2021 07:35:00 PM
Answer: I think that trains move faster then cars! Buttt, The trains are much stronger and bigger, then cars or trucks. Even if they move slowly they can still crush something smaller then them.
Explanation: ( didnt really understand the question, but i tried)
Consider the picture of a gas pump. Which type of gasoline has the highest percentage of octane (the main component of gasoline)?
unleaded: 87 octane rating
mid-grade: 89 octane rating
premium: 91 octane rating
Answer:
premium: 91 octane rating
Explanation:
Octane number refers to the percentage or volume fraction of isooctane in a fuel.
The octane number gives a picture of how safe a fuel is for an engine. The higher the octane rating the lesser the tendency of the fuel to cause knocking of the engine.
The type of gasoline with the highest percentage of octane among the options is premium.
1. Calculate the RFM of Fe(NO3)2
Answer:
The Relative Formula Mass of Fe(NO₃)₂ is 179.8524 grams
Explanation:
The Relative Formula Mass is the mass of one mole of a compound expressed in grams, obtained by adding together the Relative Atomic Masses, RAM, of the elements which makes the compound
The Relative Formula Mass of a compound is the same as its Relative Molecular Mass
The relative formula mass of Fe(NO₃)₂ is given as follows;
The relative atomic mass of Fe = 55.845 amu
The relative atomic mass of nitrogen, N = 14.0067 amu
The relative atomic mass of oxygen, O = 15.999 amu
Therefore, we have;
The formula mass of Fe(NO₃)₂ = (55.845 + 2×(14.0067 + 3×15.999)) amu = 179.8524 amu
The Relative Formula Mass of Fe(NO₃)₂ = 179.8524 grams.
