Answer:
262.5 Joules
Explanation:
You find the kinetic energy of multiplying half of the mass by the velocity. In this word problem it tells you the mass so you divide it by 2. That answer is 2.625, you then multiply that by the velocity, in this instance it's 1.0 x 10^2 mi/h.
The unit in kinetic energy is Joules. This is actually a really important part in chemistry and physics.
The kinetic energy of a baseball (mass = 5.25 oz) with a velocity of 1.0×10² mi/h is 147.88 joules.
How do we calculate kinetic energy?Kinetic energy of any object will be calculated by using the below equation:
K.E. = 1/2(mv)², where
m = mass of object in kg = 5.25 oz = 0.148 kg
v = velocity in m/sec = 1.0×10² mi/h = 160934 m/h = 44.704 m/s
On putting values on the above equation, we get
K.E. =1/2(0.148)(44.704)²
K.E. = 147.88 joules
Hence required kinetic enrgy is 147.88 joules.
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A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 mmHg and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?
Answer:
As per Dalton's law of Partial pressure,
The total pressure of a mixture of gases is equal to sum of partial pressure of individual components of the mixture.
So,P=P_H+P_N+P_WP=P
H
+P
N
+P
W
\implies 864\ mm=220\ mm+410\ mm+P_W\implies⟹864 mm=220 mm+410 mm+P
W
⟹ P_W=864-630=234P
W
=864−630=234 mm of Hg.
Explanation:
"The partial pressure of water vapor is 234 mm Hg."
What is partial pressure?
The force that a gas exerts is known as partial pressure. The total pressure of a mixture of gases is equal to the sum of their partial pressures.
Partial pressure can be calculated by using the formula: [tex]P_{Total} =P_{N} +P_{H} +P_{H}[/tex]
Puts the value of given data in above equation.
[tex]Px_{W} =864-410-220\\\\= 234 mm Hg[/tex]
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CAN SOMEONE HELP ME TO MY HOMEWORK I GIVE BRAINLIEST PLEASE
direction: LABELS EACH LAYERS USING NUMBER TO SHOW AGE OF ROCKS 1 AS THE OLDEST AND 6 IS TUE YOUNGEST PUT THE NUMBER ON THE CIRCLE PROVIDED IN EACH LAYER
I believe this is correct! :D
Give example of 1 solid, 1 liquid and 1 gas solution.
Captionless Image
Read that From picture and tell me the answer please
Answer:
1g Hydrogen
Explanation:
Getting to the equation:Calcium in water reacts vigorously to give a cloudy white Precipitate (compound) called Calcium hydroxide alongwith the evolution of Hydrogen gas.
[tex] \boxed{ \mathsf{Ca + H_2O \rightarrow Ca(OH)_2 + H_2}}[/tex]
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Balancing the equation:This reaction is not in it's balanced form! The number of atoms of Hydrogen on the left is 2 while that on the right is 4,I.e.,they're not equal.
Adding a 2 in front of H2O solves the problem by making the number of atoms of each element on both the sides equal.
[tex] \mathsf{Ca +2 H_2O \rightarrow Ca(OH)_2 + H_2}[/tex]
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Observations:Looking into the equation more carefully, we see:
1 atom of Calcium reacts with 2 molecules of water to give 1 molecule of Calcium Hydroxide alongwith 1 molecule of Hydrogen gas.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gram atomic and molecular massesMass of one atom of Calcium = it's gram atomic mass
= 40 g
Mass of one "molecule" of Hydrogen
= it's Gram molecular mass
= gram mass of one atom × number of atoms in one molecule
= 1 × 2
= 2 g
So,
according to our observation:
One atoms of Calcium gives one molecule of Hydrogen (during the particular reaction)
=> 40g of Calcium gives = 2g of Hydrogen
•°• 1 g of Calcium gives = [tex] \frac{2}{40} [/tex]
= [tex] \frac{1}{20} [/tex] g Hydrogen
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Answer:We're provided with 20g of Calcium,
=> 20g of Calcium gives = 20 × [tex] \frac{1}{20} [/tex] g H2
= 1 g H2
_______________
Hope this helps!
PLSSS HELP MEEE ASAPA!!
Which pair of elements has reactivity that is similar to Fluorine, F?
Answer:
halogens group 7A on the periodic
table
Which of the following describes a chemical property of oxygen?
Oxygen is a gas at room temperature.
An oxygen molecule has an atomic mass of 32 a m u.
The density of oxygen is 0.00133 grams per centimeter cubed .
Oxygen reacts with iron to form rust.
Answer:
Oxygen Reacts with Iron to Form Rust is the Correct Answer
Which statement is true about oxygen and rocks?
A) Both are mixtures.
B) Both are pure substances.
C)Oxygen is a mixture and a rock is a pure substance.
D)Oxygen is a pure substance and rocks are mixtures.
Answer: both are mixtures , Brainliest please
Explanation:
Answer:
C) is the correct answer
Some substances like chalk, duster, paper, wood, air are not found in the periodic table. why?
Answer:
They are not pure elements, instead they are compounds, hence why they are not found on the periodic table. (Periodic table only consists of pure elements)
NEED HELP ASAP. Write a statement explaining your claim about whether or not the equation is correctly balanced.
Then, provide evidence that supports your claim about whether or not the equation is correctly
balanced. Next, connect your evidence to your claim about the equation.
Answer:
Explanation:
Hi! can you add the choices.
Bases react with carbon dioxide and from............. and water
Answer:
I believe the answer is B. Carbonates
Explanation:
How long does it take Earth to make one rotation on its axis?
12 hours
48 hours
24 hours
Please answer ASAP
Answer:
24 hours
Explanation:
There are 24 hours in a day cause that is how long for the earth to spin on its axis
Answer:
24 hours
Explanation:
The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.
If you were able to magnify a penny down to the atomic level, what two
observations could you make about the atoms?
The two observations you would make about the atoms are
They are made up largely of empty spaceTheir mass is concentrated at the center called a nucleusThese observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.
Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.
So,
The two observations you would make about the atoms are
They are made up largely of empty spaceTheir mass is concentrated at the center called a nucleusLearn more about the atom here:
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what additional reaction product would result if naoh was used as a base in this reaction instead of k2co3?
Answer:
What reaction product would result if NaOH was used as a base in this reaction instead of K2CO3? If sodium hydroxide was used as the base of the reaction, then the reaction product formed would be an ethyl alcohol because it would undergo a hydrolysis reaction with addition of iodoethane
The entire carbonation reaction demonstrates how potassium carbonate (K2CO3) combines with water and carbon dioxide to create potassium bicarbonate (KHCO3) when exposed to combustion flue gases at low temperatures (40 to 80 °C) (Reaction 1)
What takes place when K2CO3 and water interact?In an extremely violent and exothermic reaction, potassium carbonate splits into potassium and carbonate ions when it interacts with water. When the ions interact, potassium oxide and carbonic acid are created.
K2CO3 come from : Potassium carbonate is a common ingredient in the manufacture of soap and glass. Additionally, it serves as a light drying agent. This substance is used as a buffering agent in numerous wine making procedures. Another usage for potassium carbonate is as a fire extinguisher.
K2CO3 created : Commercially, potassium carbonate is made by reacting potassium hydroxide with carbon dioxide:
2 KOH + CO2 = K2CO3 + H2.
K2CO332H2O sesquihydrate crystallizes from the solution ("potash hydrate").
The anhydrous salt is produced by heating this solid at 200 °C (392 °F).
It disintegrates into K2O+CO2 around 1200 C. (allreaction)
By converting carbonate into carbon dioxide and water, potassium carbonate can act as a base by forming potassium hydroxide.
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a 200 g of sugar was dissolved in 100 ml of water describe the solution
A.diluted
B.concentrated
C. sweet
D. very sweet
................... answer.........pls........
Answer:
b
Explanation:
mark me as brainliest have a great day
Give two other examples each to acidic and basic oxides
Answer:
Acidic oxide, so², So³, Co², Cl²O7
Basic oxide: CaO, MgO, Na O
Explanation:
An oxide that combines with water to give an acid is termed as an acidic oxide. The oxide that gives a base in water is known as a basic oxide.
23. Mg tends to lose 2 electrons to have a full outer shell. What resulting ion will it have?
Answer: Mg2+
Explanation:
6) A 14.5 g sample of sodium chloride reacts with excess fluorine gas according to
the following chemical equation.
2 NaCl(s) + F2(g) → 2 NaF(s) + Cl2(g)
a. How many grams of sodium fluoride are produced?
b. How many grams of chlorine gas are produced?
The mass of chlorine gas produced by 14.5 grams of sodium chloride is 10.42 g.
The mass of chlorine gas produced by 14.5 grams of sodium chloride is 8.81 g.
The given parameters;
mass of the sodium chloride, = 14.5 g2NaCl(s) + F2(g) → 2NaF(s) + Cl2(g)In the reaction above, we can deduce the following;
molecular mass of 2Nacl = 2(58.44) = 116.88 g
molecular mass of 2NaF = 2(42) = 84 g
molecular mass of Cl2 = 71 g
The mass of sodium fluoride produced by 14.5 grams of sodium chloride is calculated as follows;
116.88 g of NaCl --------------- 84 g of NaF
14.5 g of NaCl ------------------- ?
[tex]= \frac{84 \times 14.5}{116.88} \\\\= 10.42 \ g[/tex]
The mass of chlorine gas produced by 14.5 grams of sodium chloride is calculated as follows;
116.88 g of NaCl --------------- 71 g of Cl2
14.5 g of NaCl ------------------- ?
[tex]= \frac{14.5 \times 71}{116.88} \\\\= 8.81 \ g[/tex]
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What Group is this Element in?
O Group 3
O Group 4
O Group 7
Group 1
Answer: group 7
Explanation:
Why does hydrogen contain more energy than gasoline?
Answer:
In fact, a fuel cell coupled with an electric motor is two to three is more efficient than an internal combustion engine running on gasoline.
Explanation:
Because hydrogen has a low volumetric energy density, it is stored onbaord a vehicle as a compressed gas to achieve the driving range of conventional vehicles.
(02.01 MC)
Observe the image. What observable property can be used to separate a mixture of sand and rice using this tool? (2 points)
Public Domain
Oa
Color
Ob
Magnetic attraction
oc
Particle size
Od
Texture
8.69 Mostly cl
Answer:
C. Particle size
Explanation:
The sand, which has smaller particles, will go through the sieve, while the rice (with a larger particle size) will not
Someone pls help me I will make you you brain
Answer:
A
Explanation:
it's Conventional Movement
What type of rock is in the reference image? How do you know?
Answer:
i think it's a sedimentary rock...
reason:- these are the only rocks containing fossils
Explanation:
brainliest plz
You measure the amount of Oxygen released when Hydrogen peroxide is reacts with Sodium Hydroxide. You are measuring a ____Change
Chemical or physical change? No links please
I will make you brainless answer this 1 question pleaaeeee!b
how many different products are formed from the dehydrohalogenation of 2-bromobutane?
Answer:
3 1-butene, Z-2-butene, and E-2-butene.
Explanation:
Since 2-butene exists as two stereoisomers, three products are possible from the reaction of potassium ethoxide with 2-bromobutane. The products are, of course, 1-butene, Z-2-butene, and E-2-butene.
nguyên tử của nguyên tố y được cấu tạo bởi 36 hạt . trong hạt nhân hạt mang điện bằng số hạt không mang điện. số đơn vị diện tích hạt nhân z là bao nhiêu
Answer:
số đơn vị diện tích hạt nhân z là : 12 và 24
what type of mixture is formed when black iron filings and yellow sulfur powder black iron filing is formed
Homogeneous
Heterogeneous
Compound
Answer:
when you heat the blend, you form iron sulfide, a compound
Depending on the ratio, you could form Fe4S3 or fool's gold
Explanation:When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has properties entirely different from Fe and S. Therefore, heating of mixture of iron and sulphur powder is a chemical change forming a compoundf
PLEASE HELP NEED ANSWER FAST
RATES OF WEATHERING LAB
Purpose:
The purpose of this lab report is to _______.
Question:
(What is the overall question you are trying to answer?)
Procedures:
(Here you will copy the lab directions over)
Data Tables:
Analysis and Conclusion:
In conclusion relative and absolute dating (or whatever your lab was about)…
Answer:
communicate the important work you have done in lab
Explanation:
which alkyl halide reacts fastest with trimethylamine in sn2 reaction?
Structure V reacts fastest with trimethylamine in SN2 reaction. Owing to less steric crowding in the transition state and ease of cleavage of the R - I bond
The question is incomplete, the complete question is shown in the image attache to this answer.
SN2 reaction is a type of nucleophilic reaction in which the nucleophile attacks the substrate from the reverse side. This is a synchronous reaction because the leaving group departs as the entering group attacks simultaneously in a hypervalent transition state.
SN2 reaction is favored by structure V owing to less steric crowding in the transition state and the easy of cleavage of the R - I bond. Hence, structure V reacts fastest with trimethylamine in SN2 reaction.
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In which range of electronegativity differences would polar covalent bonds occur?(1 point)
−1.0 to 0
0 to 1.0
0 to 0.5
0.5 to 1
This image shows electronegativities of elements on the periodic table. Based on this information, which element is most likely to form a strong ionic bond and take on electrons? (1 point)
fluorine (F)
cesium (Cs)
hydrogen (H)
helium (He)
Which option contains an example of a polyatomic ion?(1 point)
NH4
KNO3
CaCl2
MgCl
Which statement best explains the difference between polar and nonpolar covalent bonds?(1 point)
Polar covalent bonds give/take electrons, while nonpolar covalent bonds share electrons.
Polar covalent bonds share electrons, while nonpolar covalent bonds give/take electrons.
Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.
Polar covalent bonds share electrons equally, while nonpolar covalent bonds share electrons unequally
Which statement describes the bonds in iron sulfate, FeSO4? (1 point)
Fe and S have an ionic bond, and S and O have ionic bonds, too.
Fe and S have a covalent bond, while S and O have ionic bonds.
Fe and S have an ionic bond, while S and O have covalent bonds..
Fe and S have a covalent bond, and S and O have covalent bonds, too.
Answer: 1. (0.5 to 1)
2. (Fluorine)
3. (KNO3
4. (Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.)
5. (Fe and S have a covalent bond, and S and O have covalent bonds, too.)
Explanation:
Ye, have great day.
The periodic table is an arrangement of elements according to their periodic properties.
Polar covalent bonds are those compounds in which unsymmetrical electron distribution in bonds leads to polarity in the molecule. Examples of such compounds include; HCl, CHCl3, etc. A polar covalent bond occurs when the electronegativity differences between atoms lies within the range of 0.5 to 1.
Since electronegativity increases across the period and we also know that highly electropositive metals(having very low electronegativity) and highly electronegative nonmetals(having high electronegativity) form a strong ionic bond, it follows that fluorine (F) and cesium (Cs) will form a strong ionic bond.
A poly atomic ion is an ion that contains more than one atom. Given the options listed NH4^+ is an example of a polyatomic ion.
The difference between polar and nonpolar covalent bonds is that polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.
In FeSO4, Fe and S have an ionic bond, while S and O have covalent bonds.
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