Answer:
Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond.
Explanation:
What generally is the current level of deforestation in the United States
How many grams of O2 gas are in a 3700 mL container at a pressure of 775 mmHg at 33oC?
Answer:
4.8 grams
Explanation:
Use PV=nRT
P: 775 mmHg (divide by 760 mmHg to get atm) -> 1.02 atm
V: 3700 mL (divide by 1000 to get L) -> 3.7L
n: ?
R: (a constant) 0.0821L * atm/k *mol
T: 33 C (add 273 to get K) -> 306K
Move equation so n is on the side: PV/RT = n. Plug the numbers into the equation.
[tex]\frac{1.02atm * 3.7L }{306K} * \frac{K * mol}{0.0821L *atm} = 0.15 mol[/tex]
Then, convert moles to grams using the molar mass of O2 which is 32g/mol.
[tex]0.15 mol * \frac{32g}{mol}[/tex]= 4.8g
4.8g is the mass of oxygen gas which are in a 3700 mL container at a pressure of 775 mmHg at 33oC.
What is mass?A body's mass is an inherent quality. Prior to the discoveries of the atom as well as particle physics, it was widely considered to be tied to the amount of matter of a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses.
There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to accelerate (change of velocity) in the presence of a net force can be measured experimentally as mass.
PV=nRT
P= 775 mmHg/760 = 1.02 atm
V=3700 mL/1000 = 3.7L
n=
R=0.0821L× atm/k ×mol
T=33 C + 273=306K
1.02×3.7/0.0821×306= n
n=0.15 moles
mass = 0.15×32=4.8g
Therefore, 4.8g is the mass of oxygen.
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What is the mass in grams of 10 moles of ammonia, NH3?
Answer:170 grams
explanation: :)
HELPPPPP
Which of these statements is NOT true?
Which of these statements is NOT true?
Sound waves and electromagnetic waves are both needed to talk on a cell phone.
Sound waves are faster than light waves when traveling through the air.
Sound waves need a medium, but electromagnetic waves can travel in a vacuum.
You can hear sound waves, but you cannot hear radio waves.
Answer:
Sound waves are faster than light waves when traveling through the air.
(This statement is NOT true)
or
Sound waves and electromagnetic waves are both needed to talk on a cell phone
Explanation:
Sound waves need a medium to travel through, but light does not.
Also, the statement "Sound waves and electromagnetic waves are both needed to talk on a cell phone" might also be NOT true, since, as far as I know, cellphone calls need radio and sound waves, not electromagnetic waves.
The half-life of Radon-222 is 3.8 days. If a 10 gram sample is present, how many days will it take to have less than one gram remaining?
(alt + F4) might be the answer you are looking
Explanation:
I'm not exactly sure how I came up with this answer but it is for sure the answer
do isomers have the same chemical and physical properties? State a reason for your answer
Answer:
your answer is
isomerism, the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties.
Hope it’s helps you Buddy
Explanation:
~Zayn
What process causes the banks of the Dead Sea to look the way they do?
What else is produced during the combustion of propane, C3H8?
C3 H8 + 502 → 3CO2 + 4_______
A) H20
B) C3H8
C) O2
D) C3H8O2
Answer:
H2O
option a is correct
4H2O is 8 H.
What’s the empirical formula of a molecule containing 65.5% carbon, 3.5% hydrogen, and 32.0% oxygen?
Answer:
attached
Explanation:
answer attached
hope this helps!
Humans belong to the Kingdom Animalia and Domain Eukarya. In terms of classification, which choice best represents the hierarchy of kingdoms and domains relative to each other?
A) Kingdoms are larger than domains and include more organisms.
B) Domains are larger than kingdoms and include more organisms.
C) Kingdoms are larger than domains and include fewer organisms.
D) Domains are smaller than kingdoms and include more organisms.
Domains are larger than kingdoms and include more organisms as far as the classification of living organisms is concerned.
Domains
When it comes to classifying living organisms, the highest level of classification is the domain. Under each domain is where we have the kingdoms.
For example, the domain eukarya contain four kingdoms; plant, animal, fungi, and protozoa.
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Answer:
The Answer is B
Explanation:
Domains are larger than kingdoms :) Your welcome
Anyone know any good chemistry jokes???
Answer:
What do you do with a sick chemist? If you can't helium, and you can't curium, then you might as well barium!
Explanation:
there
Answer:
why can you never trust a atom?
Because they literally make up everything
(i am so sorry for this lol)
When HCl and NaOH react in an aqueoussolution, the H+ and OH− combine to form
They combine to form water
Neutralisation reactionA neutralisation reaction is a type of chemical reaction whereby an acid and base reacts in an aqueous solution
to form salt and water only.
For example, the acid HCl reacts with the base NaOH to give salt (NaCl) and water (H2O).
Positive sodium ions from NaOH and negative chloride ions from HCL combine to form the salt sodium chloride (NaCl).
While the H+ from the acid and OH− from base combine to form water.
Therefore, when HCl and NaOH react in an aqueous solution the H+ and OH− combine to form water.
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When solving a mass to mass problem, what is the first thing you do after balancing the equation?
A) divide by the molar mass of the unknown
B) divide by the molar mass of the known
C) multiply by the molar mass of the unknown
D) multiply by the molar mass of the known
This is typically done by dividing by the molar mass of the known, so the correct answer is B) divide by the molar mass of the known.
What is Molar Mass?
Molar mass is the mass of one mole of a substance. It is usually expressed in grams per mole (g/mol). The molar mass of a compound is determined by summing the atomic masses of all the atoms in the compound's chemical formula. The molar mass of an element is simply the atomic mass of that element. Molar mass is an important concept in chemistry because it allows us to easily convert between the mass of a substance and the number of moles of that substance, and thus to perform calculations involving chemical reactions and stoichiometry.
When solving a mass to mass problem, the first step after balancing the equation is to determine the given quantity and convert it to moles. This is typically done by dividing the given mass by the molar mass of the substance.
Once the given quantity is converted to moles, the mole ratio between the given substance and the unknown substance is determined by examining the coefficients in the balanced chemical equation. This ratio is used to convert the moles of the given substance to moles of the unknown substance.
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Is it ture the sun moves across the sky
Answer:
Yes, this statement is true. The sun moves across our sky from east to west.
Explanation:
(fun fact: on Mars the sun moves across the sky from west to east!)
Which statement correctly describes how energy transforms?
When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.
When a fire is burning, visible energy is turned into thermal energy in the form of light and chemical energy in the form of heat.
When a fire is burning, thermal energy is turned into visible energy in the form of light and chemical energy in the form of heat.
When a fire is burning, visible energy is turned into chemical energy in the form of light and thermal energy in the form of heat.
Answer: When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.
Explanation:
In this food chain, which describes all of the
possible energy sources for the bacteria?
Answer:
Energy flows from primary producers to consumers, in one direction only
Explanation:
Where within the cell does the process of respiration take place?
Answer:
cytoplasm
Explanation:
Answer:
mitochondria
Explanation:
While most aerobic respiration (with oxygen) takes place in the cell's mitochondria, and anaerobic respiration (without oxygen) takes place within the cell's cytoplasm
what is mommentum machnics
Answer:
momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion.
A chemical reaction can theoretically produce 137. 5 grams of product, but in actuality 112. 9 grams are produced. Which is the percent yield for this reaction?.
The formula for percent yield is:
(experimental ÷ theoretical) × 100%
Simply input the numbers into this formula and you will get your answer.
percent yield = (112.9 ÷ 137.5) × 100%
percent yield = 82.10909091 (round as you wish)
percent yield = 82.11%
When each formula unit of potassium carbonate, k 2 c o 3 , dissociates into ions in solution, there is choose. Of the choose. Cation and choose. Of the choose. Anion.
From the formula unit of potassium carbonate, there are two potassium ions and one carbonate ion.
What is formula unit?The term formula unit refers to the smallest unit in an ionic compound. It shows the ratio of the ions in the compound. For potassium carbonate, the formula unit is K2CO3.
From this formula unit, we can see that there are two potassium ions and one carbonate ion.
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The equation for the pH of a substance is pH = –log[H ], where H is the concentration of hydrogen ions. What is the approximate pH of a solution if the concentration of hydrogen ions is 5. 0 × 10–4 moles per liter? 2. 7 3. 0 3. 3 3. 6.
The formula is pH = -log[[tex]H^{+}[/tex]]. You are given the concentration of hydrogen ions so all you need to do is input that into the formula.
[tex]pH=-log[H^{+}]\\\\pH=-log[5.0x10^{-4}]\\\\pH=3.30[/tex]
Three moles of nitrogen at 30°c, contained in a rigid vessel, is heated to 250°c. How much heat is required if the vessel has a negligible heat capacity?.
The amount of heat required is 19219.2 J
Determination of the mass of nitrogen Mole = 3 moles Molar mass of nitrogen = 2 × 14 = 28 g/mol Mass of nitrogen =?Mass = mole × molar mass
Mass of nitrogen = 3 × 28
Mass of nitrogen = 84 g
How to determine the heat required Mass of nitrogen (M) = 84 gInitial temperature (T₁) = 30 °C Final temperature (T₂) = 250 °Change in temperature (ΔT) = 250 – 30 = 220 °C Specific heat capacity (C) = 1.040 J/gºC Heat (Q) =?Q = MCΔT
Q = 84 × 1.040 × 220
Q = 19219.2 J
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Give one example of erosion.
SCIENCE
Answer: a rock being in one place over a long time and eventually wearing away
Explanation:
:)
State the effect of
a. CO2
b. CO
c. So
d. NO2
Answer:
your answer is
Exposure to CO2 can produce a variety of health effects.CO can cause dizziness, confusion, unconsciousness and death.--development of asthma and potentially increase susceptibility to respiratory infections
hope it helps you Buddy
Explanation:
~Zayn
1. What objects in this picture are in motion?
2.What is the unbalanced force in this picture?
3. What happened to the sledder in this picture?
Sled is the object in this picture which is in motion. Sled hitting rock is the unbalanced force in this picture. He took off when they were startled by the abrupt stop.
What is force?A force is an external cause that, when applied, alters or has the potential to alter a body's condition. The body comes to rest while it is moving, and it moves when it is at rest. The body's orientation, form, size, etc. may also alter as a result. An illustration would be to push or forcefully shove a door. Force has both a magnitude and a direction since it is a vector quantity.
Sled is the object in this picture which is in motion
Sled hitting rock is is the unbalanced force in this picture
He took off when they were startled by the abrupt stop
Therefore, Sled is the object in this picture which is in motion. Sled hitting rock is is the unbalanced force in this picture. He took off when they were startled by the abrupt stop.
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How many molecules are in 34.61 grams of sulfur dioxide?
Give your answer in scientific notation using the form M*10^N
Type your answer...
This problem is providing us with the mass of sulfur dioxide and the molecules contained are required. At the end, the result turns out to be 3.252x10²³ molecules, according to:
Avogadro's number:In chemistry, we use the Avogadro's number in order to successfully perform mole-mass-particles calculations. Defined as 6.022x10²³, it provides the number of atoms, molecules and ions in one mole of the substance.
In this case, in order to obtain the result, one first calculates the moles in 34.61 grams of sulfur dioxide and then utilize the Avogadro's number to obtain the number of molecules as shown below:
[tex]34.61gSO_2*\frac{1molSO_2}{64.1gSO_2}*\frac{6.022x10^{23}molecules}{1molSO_2} \\\\3.252x10^{23}molecules[/tex]
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In the solvent pair experiment that is being carried out with the solid that is being recrystallized, why do you not have to worry about sudden vigorous boiling of crystal solution when you add the second solvent to the solution?.
You do not have to worry because it will not affect the yield of the pure crystals.
What is re-crystallization?Re-crystallization is the process of obtaining pure crystals from a super saturated solution.
This is done by heating a solution of the impure substance to a high temperature and then allowing the hot solution to cool down and the crystals begin to appear.
You do not have to worry about sudden vigorous boiling of crystal solution when you add the second solvent to the solution because it will not affect the yield of the pure crystals.
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the volume of a cylindrical tin can with a top and a bottom is to be 16Ï cubic inches. if a minimum amount of tin is to be used to construct the can, what must be the height, in inches, of the can
Answer:
The required height of the tin can is given by the height at the minimum value of the surface area function of the tin can
The height of the tin can must be 4 inches
Reason:
The given information on the tin can are;
Volume of the tin can = 16·π in.³
The amount of tin to be used = Minimum amount
The height of the can in inches required
Solution;
Let h, represent the height of the can, we have;
The surface area of the can, S.A. = 2·π·r² + 2·π·r·h
The volume of the can, V = π·r²·h
Where;
r = The radius of the tin can
h = The height of the tin can
Which gives;
16·π = π·r²·h
16 = r²·h
Which gives;
When the minimum amount of tin is used, we have;
Therefore;
4·π·(r³ - 8) = r² × 0
r³ = 8
r = 2
The radius of the tin can, r = 2 inches
The
The height of the tin can, h = 4 inches
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Explanation:
If a car travels 150 km in 3.0 hours, the speed is ?
Answer:
50km per hour.
Part of the speed, distance, time triangle.
To get speed, just divide distance by time. 150/3=50
Mole ratio practice worksheet part 1
