Answer:
One gram of carbon dioxide contains 13.6 x 10²¹ number of molecules.
Explanation:
Answer:
1.50 moles
Explanation:
use dinemential analysis
find the molar mass
what is galvanization
What mass of water is in a calorimeter where 225.0 J of heat are
transferred to the water from a heated piece of metal and the
temperature of the water is increased by 4.00°C?
Answer:
22.25 °C
Explanation:
Determine the final temperature when a 25.0 g piece of iron at 85.0 °C is placed into 75.0 grams of water at 20.0 °C.
Brainliest
Which choice is an example of the use of sound energy in everyday life?
batteries powering toys
fireplaces keeping people warm
lights helping people see
car horns preventing accidents
Answer:
car hornsss
Explanation:
they loud asl
20 L of nitrogen gas are collected at a temperature of 50°C and 2 atm. How many grams of nitrogen gas were collected? A.21.1 g B.29.6 C.42.3 g D.59.2
Taking into account the Ideal Gas Law, the mass of nitrogen gas collected is 21.1 grams.
Ideal Gas LawIdeal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of gases:
P×V = n×R×T
Mass of nitrogenIn this case, you know:
P= 2 atmV= 20 Ln= ?R= 0.082 [tex]\frac{atm L}{molK}[/tex]T= 50 °C= 323 K (being 0°C= 273 K)Replacing in the ideal gas law:
2 atm ×20 L = n×0.082 [tex]\frac{atm L}{molK}[/tex] ×323 K
Solving:
n= (2 atm ×20 L) ÷(0.082 [tex]\frac{atm L}{molK}[/tex] ×323 K)
n= 1.51 moles
Being the molar mass of nitrogen 14 g/mole, that is the amount of mass that a substance contains in one mole, the mass of nitrogen gas collected is calculated as:
[tex]mass of nitrogen gas=1.51 molesx\frac{14 grams}{1 mole}[/tex]
mass of nitrogen gas= 21.1 grams
Finally, the correct answer is option A.: the mass of nitrogen gas collected is 21.1 grams.
Learn more about ideal gas law:
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.
...............................
Answer:
F is correct
Explanation:
When an atom or group of atoms" has more protons than electrons",it is positively charged. An atom or group of atoms that has the same number of protons and electrons is neutrally charged.
Answer: If an object that has an excess of positive electrons it is a positively charged object.
This figure shows the dimensions of a right triangular prism.
Right prism with triangular base. Height of triangle labeled 2 m and base labeled 3 m. Height of prism labeled 8 m.
What is the volume of the right triangular prism in cubic meters?
144 m3
16 m3
24 m3
48 m3
Answer:
ik that its not 48 because i answerd 48 and i got it wrong and im pretty sure its also not 144
Explanation:
From the calculations and the data given, the volume of the triangular prism is 24 m3.
What is a traingular prism?The trangular prism is a prismatic figure that has a trianguar base. We know that the formula for the volume of a triangular prism is;
V = 1/2 a c h
Now;
a = 2 m
b = 3 m
h = 8 m
V = 1/2 * 2 m * 3 m * 8 m
= 24 m3
Learn more about volume:https://brainly.com/question/13805601?
How much energy (in J) is required to raise the temperature of 19.2 g of water by 5.00 oC? (Specific heat capacity of liquid water: 4.184 J/g⋅°C)
A rubber ball is held 4.0 m above a concave spherical mirror with a radius of curvature of 1.5 m. At time equals zero, the ball is dropped from rest and falls along the principal axis of the mirror. How much time elapses before the ball and its image are at the same location?
The time elapsed when the ball placed above the concave mirror and the image formed would be at the same location is 0.55 s.
Image distanceThe position of the image formed is determined using the followimg mirror formula;
[tex]\frac{1}{f} = \frac{1}{v} + \frac{1}{u}[/tex]
where;
f is the focal length of the mirrorv is the image distanceu is the object distancef = R/2
f = 1.5/2
f = 0.75 m
When the ball and its image is in the same position, u = v
The position of the ball is calculated as;
[tex]\frac{1}{f} = \frac{1}{u} + \frac{1}{u} \\\\\frac{1}{f} = \frac{2}{u} \\\\u = 2f\\\\u = 2(0.75)\\\\u = 1.5 \ m[/tex]
Time of motion of the ballThe time taken for the ball to travel the caluclated distance is determined as;
h = ut + ¹/₂gt²
1.5 = 0 + ¹/₂(9.8)t²
1.5 = 4.9t²
t² = 1.5/4.9
t² = 0.306
t = 0.55 s
Thus, the time elapsed when the ball and its image are at the same location is 0.55 s.
Learn more about concave mirror here: https://brainly.com/question/7512320
what is the empirical formula of a cpd containing 60.0%of sulfur 40.0% oxygen by mass
Answer:
n S = 60 32 = 1.875 , n_S=\tfrac{60}{32}=1.875, nS=3260=1.875, n O = 40 16 = 2.5.
Explanation:
A gas made up of homonuclear diatomic molecules escapes through a pinhole 0.378 times as fast as He gas. Write the chemical formula of the gas.
For a gas made up of homonuclear diatomic molecules escapes through a pinhole 0.378 times as fast as He gas, the chemical formula of the gas is mathematically given as
N2(nitrogen gas)
What is the chemical formula of the gas.?Generally, the equation for the rate to molar relationship is mathematically given as
\frac{r1}{r2}=\frac{mm2}{mm1}
Thereofore
\frac{r}{r2}=0.378
Hence
0.378=\sqrt{\frac{4.00268}{Mx2}}
Mx2=28.013g/mol
In conclusion,The name of gas with a molar mass of 28.013g/mol is N2
Therefore, the chemical formula of the gas. is N2
Read more about mass
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(ii) Explain why magnalium is harder than aluminium.
Answer:
Magnalium is stronger than aluminium alone but still has a low density.
Explanation:
Which of the following states is NOT true with regards to the expansion of slavery into the western territories?
1The Wilmot Proviso aimed at prohibiting slavery in any territory that would be won from Mexico. It was not passed by Congress, but it wc
territories for the next fifteen years.
2The idea of letting white settlers decide if the territories they moved to would be free or slave was known as popular sovereignty.
3The whig candidate for president in 1848, war hero Zachary Taylor, had no party affiliation and had never himself voted in a presidential ele
4 The Free Soil party, which
nominated former president Martin Van Burn in 1848, wanted to abolish slavery in the USA, to make the countr
Answer:
what I don't understand anymore JJ is the best thing I think it's help with that I hope it's a pako I will be there in about a
What are renewable resources?
Answer:
Renewable sources are something that can be renewed like
Plants
Trees
etc
uh
Explanation:
Non-renewable for example is you cant renew them at all
there built by the earth themselfs
Like
cole
gemstone
Steel
Metal
etc
How to pay taxes I MEAN
Calculate the volume of 2.30 moles of gas exerting a pressure of 2.80 atm at 155°C.
Answer:
28.83dm³
Explanation:
Using ideal gas equation
PV=nRT
P=2.80atm
n=2.30
R=0.082
T=155°C (155+273=428Kelvin)
V=nRT/P
V=2.30×0.082×428/2.80
V=28.83dm³
what mass of water must be added to 0.50 mol of glucose to make a solution of 25 percent by mass? the molar mass of glucose is 180 g/mol. SHOW WORK PLSS.
Answer:
270 g of water
Explanation:
A gas occupies a volume of 1.0 L at 25°C. What volume will the gas occupy at 100°C?
A)
4.0 L
B)
0.80 L
C)
1.3 L
D)
1.0 L
Answer:
A
Explanation:
1.0 L * 4 = 4L volume that the gas can occupy at 100 degree Celsius
What is the electro negativity difference for CO ?
The electronegativity of carbon is about 2.5 , and that of oxygen is about 3.5 , and naturally, (3.5−2.5=1.0)>0 . So, the electronegativity difference is greater for a C−O single bond than a F−F single bond.
Answer:
1.0
I hope my answer helps you.
Na
Η Ο
Is this an element or a compound?
Answer:
compound
Explanation:
because h is hydrogen, then O is oxygen
A student with a cold experiences a fever. The fever results directly from the activity of which body system?
A: Respiratory
B: Immune
C: Circulatory
D: Skeletal
Answer:
its prob B since thats the system that protects the body from harmful substances
Explanation:
Answer:
B since that's the system that protects the body from harmful substances.
hope you like it
If two metals had the same specific heat, how can we distinguish them in two ways?
Answer:
Specific heat is an intensive property (like density, color, etc.) that does not depend on the amount of a substance present. This allows substances to be identified using their specific heat. Imagine an unknown metal of known mass is heated to a known temperature.
Explanation:
use the equation:
2C6H6 + 1502 →12CO2 + 6H20
Calculate the number of moles of oxygen required to react with 5.00 moles of C6H6.
Show steps
Answer:
37.5 moles of O2 needed
Explanation:
2 moles of C6H6 need 15 moles of O2
5/2 * 15 = 37.5 of O2 needed
What is the theoretical yield of sodium chloride for the reaction of 55.0 g of Na
D
with 67.2 g Cl2?
g
a. 1.40 x 102 g NaCl
b. 111 g NaCl
c. 55.4 g NaCl
222 g NaCl
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the concept of Physical chemistry, and Stochiometry.
So we balance the equation as,
2Na + Cl2 ===> 2NaCl
The required reaction is as:
2Na+ Cl2 = 2NaCl
2 moles Na = 2×23 g = 46g,1 mole Cl2 = 2×35.5g=71g
Now,71g Cl2 reacts with 46g Na,
Therefore, 67.2g Cl2 reacts with 46×67.2/71= 43.54g Name
The rest Na = (55–43.54)g=11.46g
That means Cl2 is a limiting reactant.
Again,2 moles NaCl=2(23+35.5)g=117g
Then,71g Cl2 produce 117g NaCl
Therefore,67.2g Cl2 produce 117×67.2/71 = 110.74g NaCl
hence the correct option is, b.) 111 g NaCl
How many grams of air are required to complete the combustion of 186 g of phosphorus (M= 31 g/mol) to diphosphorus pentoxide, assuming the air to be 23% oxygen by mass?
4P(s) + 5O2(g) — 2P2Os(s)
Answer:
1043.5 g of air to the nearest tenth.
Explanation:
4P + 5O2 ---> 2P2O5
4*31 g P reacts with 5*32 g oxygen
124 g .. .. . .... . 160g oxygen
186 g .. .. .. .. .. (160*186)/124 g oxygen
- so the mass of air required = [(160*186)/124] / 0.23
= 240 / 0.23
= 1043.5 g of air.
If an atom such as hydrogen is able to form a covalent bond describe what happens when the electron shells of two atoms overlap
Answer:
they share electrons to complete eachothers outer shell
Explanation:
Giving Brainliest
Which choice is an example of the use of sound energy in everyday life?
batteries powering toys
fireplaces keeping people warm
lights helping people see
car horns preventing accidents
Answer:
car horn preventing accidents
Answer:
d) car horns preventing accidents
Explanation:
the use of car horns represents sound energy in everyday life. batteries use chemical energy that is turned into electrical energy, fireplaces use thermal energy, and lights use electrical energy!
The atomic weight of nitrogen is what ?
Explanation:
[tex]\longmapsto\: \green{ hello \: mate \: }[/tex]
Atomic weight of nitrogen is 23
possible cause of water hammering?
Answer:
At home, a water hammer may occur when a dishwasher, washing machine or toilet shuts off water flow. The result may be heard as a loud bang or repetitive banging since the shock wave travels back and forth in the plumbing system.
The Molar mass of silicon is 28.09 grams/mole
Calculate the number of atoms in a 92.8 mg sample of silicon
Write your answer in scientific notation using three significant figures
Giving Brainliest!
Wetlands filter and clean water flowing through them. In the system shown in the diagram, the wetland cleans water entering the ocean by which means?
A: Run-off
B: Precipitation
C: Evaporation
D: Condensation
Answer:
im guessing its A run off
Explanation:
Answer: Run off
Explanation:
Wetlands have plants that clean water through. As water flows into a wetland it encounters the the plants growing there. This slows the water down making it less likely to cause erosion. The nutrient pollutants nitrogen and phosphorus are absorbed by the roots of the plants.
When 8.45 g of propane burns at STP, what volume of carbon dioxide is produced?
C3H8+ 5O2 > 4H2O+ 3CO2
The answer is 12.9L (I NEED THE STEPS)
The volume of carbon dioxide produced if 8.45 g of propane is burned would be 12.9 L
Stoichiometric calculationFrom the equation of the burning:
[tex]C_3H_8+ 5O_2 -- > 4H_2O+ 3CO_2[/tex]
The mole ratio of propane burned to carbon dioxide produced is 1:3.
Mole of 8.45 g propane = 8.45/44.1 = 0.19 moles
Equivalent mole of carbon dioxide produced = 0.19 x 3 = 0.57 moles
1 mole of any gas at STP = 22.4 L
0.57 moles of carbon dioxide at STP = 22.4 x 0.57 = 12.9 L
More on molar volume of gases at STP can be found here: https://brainly.com/question/1542685
