When the equation Na(s)+ H2O(l) ---> NaOH(aq) + H2(g) is correctly
balanced using smallest whole numbers, the coefficient of the water is
A.1
B.2
C.3
D.4
Answers
the answer is C.3
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Related Questions
Which statement is true about the square pyramid below?
32 in
| 29 in
The base has an area of 464 square inches.
The base has an area of 928 square inches.
Each of the lateral faces has an area of 464 square inches.
Each of the lateral faces has an area of 928 square inches.
Answers
Answer:
C) Each of the lateral faces has an area of 464 square inches.
Explanation:
Have an actual answer
Answer:
CCCCCCCCCCCCCCCCCCC
Explanation:
Each of the lateral faces has an area of 464 square inches.
What color does blue brown and red make
Answers
Answer:
dark brown with a hint of purple
have a good day :)
Explanation:
Ok so lets say that you are in love with this girl u r talking to and she just got out of a bad relationship and u want to get with her but she wants to wait. Do you wait on her or just keep her in mind and go on and find someone new?
Answers
if you really liked this person then it would be no discussion if you really do like this person then you want to wait
Answer:
Wait on her
Explanation:
Talk to her and try to be friends with her. Let her talk about the relationship she came out of and see if she wants to meet someone new. If she seems interested in you, take that chance. If she seems to be interested in someone else, find someone new.
how many moles are 2.54 x 10^29 molecues of H2O
Answers
Answer:
[tex]\boxed {\boxed {\sf 421,786.7818 \ mol \ H_2O}}[/tex]
Explanation:
We are asked to convert from molecules of water to moles.
1. Avogadro's Number1 mole of any substance contains the same number of particles (atoms, molecules, formula units, etc). This is Avogadro's Number: 6.022*10²³. In this problem, the particles are molecules of water.
2. Convert Molecules to MolesUse Avogadro's Number to make a ratio.
[tex]\frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Multiply by the number of molecules given: 2.54 *10²⁹
[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Flip the ratio so the units of molecules of water cancel.
[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} \ molecules \ H_2O}[/tex]
[tex]2.54 *10^{29} \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} }[/tex]
Condense the problem into 1 fraction.
[tex]\frac {2.54 *10^{29} }{6.022 *10^{23} }\ mol \ H_2O[/tex]
[tex]421786.7818 \ mol \ H_2O[/tex]
2.54 *10²⁹ molecules of water are 421, 786.7818 moles of water.
The musculoskeletal system is a combination of two essential organ systems: the
skeletal system that stores calcium and phosphorus, two minerals essential to living
organisms, and the muscular system that facilitates the movement of food through
the digestive system and blood and oxygen through the circulatory system. Which of
the following is NOT a function of the musculoskeletal system?
A)Allow body movement.
B)Stabilizes the body,
C)Produces blood cells.
D)Protects internal organs.
Answers
Answer:
B)Stabilizes the body
...........................
What is anything has mass and volume called?
Answers
Answer:
Matter
Explanation:
It has mass and it takes up space
which statement best describes the difference between weather and climate
a) climate is about the hydrospace, weather is about autosphere
b) climate describes average temperature, weather describes many more factores
c) Climate is long periods of time, weather is short periods of time ( present day)
d) Climate describes conditions at sea level, weather describes conditions at different elevations
WILL MARK BRIANLIEST
Answers
Answer:
C
Explanation:
Brainliest
I tried my best
The power of the crane was 68600 W
Caculate the time taken for the crane to do 3430000 J of work
Give the unit
Answers
Answer:
t = 50 s
Explanation:
P = W/t
Solving for t,
t = W/P = (3430000 J)/(68600 Watts)
= 50 s
Note: 1 Watt = 1 J/s
According to the question, the time that is taken by the crane which has the power of 68600 W to 3430000 J of work is 50 seconds.
What is Power?Power may be defined as the amount of energy that is significantly transmitted or converted per unit of time. In a more simple sense, it is also characterized as the measure of the rate of doing work.
According to the question,
The power of the crane = 68600 W.
The amount of work that the crane has to do = 3430000 J.
Time may be calculated with the help of the following formula:
Power = Work/time.Time = Work/power = 3430000 J/68600 W = 50 seconds. (where 1 W = 1 J/sec).Therefore, according to the question, the time that is taken by the crane which has the power of 68600 W to 3430000 J of work is 50 seconds.
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Riley let his friend borrow $12,750. He wants to be paid back in 57 months and is going to charge his friend a 5.5% interest rate. How much interest will his friend have to pay?
Answers
What is meant by the term acid?
Answers
Answer:
containing acid or having the properties of an acid; having a pH of less than 7.
how does Arizona's climate relate to the air and ocean currents?
Answers
Answer: In Arizona, climate change is already making deadly heat waves, droughts and wildfires across the state worse. These impacts have real costs on Arizonans' health and economy, including heat-related deaths, higher electricity bills, crop losses and more.
Explanation:
https://www.edf.org/climate/costofinaction- this is where I gathered this info. Not mine. But I hope it helps!
Oxygen (2) element name
Answers
Answer:
Oxygen has two allotropic forms, diatomic (O₂) and triatomic (O₃, Ozone).
-TheUnknownScientist
Helpp!! Please it’s balancing equations and I really need help in it it’s so hard theirs two other parts if you can help with those too:))
Answers
2.)
1st one - 2,6,2,3
2nd one - 2,2,1
3rd one - 1,2,2,1
4th one - 1,2,1,2
The earth’s _____ creates a cross-current motion that captures the north and south moving air creating a ___ _____?
ANSWER AND YOU WILL BE MARKED BRAINLIEST (NO FILES) :))
Answers
Answer:
deflection,Coriolis effect
hope this helps
Calculate the moles of of Fe that would be needed to form 336 grams of Cl2 (round your answer to 2 decimals)
2Fe + 3Cl2 → 2FeCl3
Answers
Answer:
6.32 moles of Fe
Explanation:
The given chemical equation is presented as follows;
2Fe + 3Cl₂ → 2FeCl₃
The mass of Cl₂ in the reaction = 336 grams
The molar mass of chlorine gas Cl₂ = 35.435 g/mol
The number of moles, n = Mass/(Molar mass)
The number of moles of Cl₂ in the reaction, n = 336 g/(35.435 g/mol) ≈ 9.842 moles
From the given reaction, 3 moles of Cl₂ react with 2 moles of Fe to produce 2 moles of FeCl₃
By the law of definite proportions, we have that 9.482 moles of Cl₂ will react with approximately 9.482 × 2/3 = 6.32 moles of Fe to produce approximately 6.32 moles of FeCl₃
Therefore, approximately 6.32 moles of Fe will be required to react with 336 grams of Cl₂.
can someone help me sort this :(
Answers
Answer: A. is prey B. is predator C. is habitat D. is comunity E. is plants are producers and plant eating animals consumors F. is food chain G. is food web H. parasite I decomposers and scavengers J. is compete K an adsption
Explanation:
why is acetic acid a liquid at room temperature? give reason.
Answers
Answer:
Acetic acid is a liquid at room temperature if room temperature is 20 C or above. ... Pure acetic acid is often called glacial because at a low temperature it solidifies and looks like ice. The melting point is 16.6C so not much below room temp.
Explanation:
If 3.4 mole of aluminum carbonate is exposed, how many moles of aluminum oxide will form?
Answers
I got right
100%
two ways the rate of a reaction be monitored
Answers
Answer: If a reaction produces a gas such as oxygen or carbon dioxide, there are two ways to measure the reaction rate: using a gas syringe to measure the gas produced, or calculating the reduction in the mass of the reaction solution.
Explanation:
https://courses.lumenlearning.com/introchem/chapter/measuring-reaction-rates/#:~:text=If%20a%20reaction%20produces%20a,mass%20of%20the%20reaction%20solution.
This is the site I got it from. I hope this helps.
Which characteristic most likely identifies an object with a small volume and a large mass?
A.
high temperature
B.
low pressure
C.
low viscosity
D.
high density
Answers
Answer:
high density is the ans because density is the mass per unit volume.if mass increases density also increases.
Answer:
High temperature is an object with a small volume and a large mass.
Answer is no A
que es la nanotecnologia ?
porfis lo nesecito urgente para antes de las 10
Answers
Answer:
Se aclama la nanotecnología por tener el potencial de aumentar la eficiencia del consumo de energía, ayudar a limpiar el medio ambiente y resolver los principales problemas de salud. Se dice que puede aumentar masivamente la producción de fabricación a costos significativamente reducidos.
espero que esto ayude
Choose all the right answers. The four major type of animal tissue are: A.cytoplasmic B.support C.connective D.epithelial E.muscular F.nervous LINKS WILL BE REPORTED
Answers
Answer: 1. Connective Tissue 2.)Epithelial Tissue 3.)Muscle Tissue 4.)Nervous Tissue
Explanation:
Which of the following statements about energy is true?
A. Energy can be created in a chemical reaction.
B. Energy can be destroyed in a chemical reaction.
C. Energy cannot be created or destroyed in a chemical reaction.
D. Energy can be created but cannot be destroyed in a chemical reaction.
Answers
which kind of climate do the most stable ecosystems tend to have?
A. Wet winters, dry summers
B. Cold winters, warm summers
C. cold and dry year-round
D. Warm and moist year round
Answers
solute separates as a solid when a saturated solution is cooled why
Answers
Answer:
When a saturated solution at a high temperature is cooled, why is the solution separated as a solid? When a saturated solution at a high temperature is cooled, inter molecular space between the molecules of the solution decreases. As a result, no more solute can remain in a solution separating out as a solid crystal.
3.00 L of a gas is collected at 150 K and then allowed to expand to
15.0 L. What must the new temperature be in degrees C in order to
maintain the same pressure (as required by Charles' Law)?
Answers
Answer:
477 ºC
Explanation:
on an isobaric process, an increase on the volume implies an increase on the temperature:
V1/T1 = V2/T2
T2 = V2T1/V1 = 15.0 L×150 K/3.00 L = 750 K
t/ºC = T/K - 273 = 750 K/K - 273
t = 477 ºC
V1: initial volume
T1: initial temperature
V2: final volume
T2: final temperature
PLEASE HELP ME ASAP!!! 10 POINTS!!
The three equations below represent nuclear fission and nuclear fusion reactions. For each equation, tell whether fission or fusion has occurred and write the missing term in the equation.
A) ²³⁵₉₂ U+n→⁹⁵₃₈Sr+____+2n
B) ³₁H+²₁H→⁴₂H+____
C) ____+n→⁹²₃₉Y+¹⁴⁰₅₃I+2n
Answers
Explanation:
A) fission: Iodine-140 (atomic number = 53)
B) fusion: 1 neutron
C) fission: Uranium-233 (atomic number = 92)
Si tuvieras que definir los atomos segun los postulados de Dalton, dirias que los atomos son particulas:
Answers
Answer:
Según el científico inglés John Dalton, los átomos son esferas elásticas e indivisibles. Así, según él, el átomo es el bloque de construcción más pequeño de la materia. Es homogéneo e indivisible, y todos los átomos de un elemento químico dado son idénticos (es decir, tienen el mismo conjunto de propiedades).
Aunque se descubrió a finales del siglo XIX que los átomos están hechos de partículas aún más pequeñas y pueden sufrir transformaciones, y que los átomos de un elemento dado pueden diferir ligeramente entre sí (isótopos), la teoría de Dalton fue la base para el desarrollo de la tecnología química moderna.
Which is NOT true of the Sc3+ ion?
Multiple choice question.
A)
It is a scandium ion with three positive charges.
B)
It was formed by the loss of 4s and 3d electrons.
C)
It has the same electron configuration as Ar.
D)
It is considered to be a different element than a neutral Sc atom.
Answers
Answer:
D. It is considered to be a different element than a neutral Sc atom.
The statement i.e. not true of the Sc3+ ion is that it is considered to be a different element than a neutral Sc atom.
The statements that should be considered as true regarding the Sc3 + ion is as follows:
It represents the scandium ion having 3 positive charges.It is created via the loss of 4s & 3d electrons. And, it contains the similar configuration as treated as Ar.Therefore we can conclude that the statement i.e. not true of the Sc3+ ion is that it is considered to be a different element than a neutral Sc atom.
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PLEASE HELP ME (JOULES)
Type the correct answer in the box. Round your answer to the nearest whole number.
Dina has a mass of 50 kilograms and is waiting at the top of a ski slope that’s 5 meters high.
The maximum kinetic energy she can reach when she skis to the bottom of the slope is
joules.
Use PE = m × g × h and g = 9.8 m/s2. Ignore air resistance and friction.
Answers
Answer:
2450 joules
Explanation:
The formula for potential energy is PE = m x g x h
m is the mass, in kg (50)
g is the acceleration due to gravity, in meters per second squared (9.8)
h is the height, in meters (5)
The problem gives m = 50, g = 9.8, and h = 5. Plug that into the formula and get the answer.
[tex]PE = mgh\\PE = (50) (9.8) (5)\\PE = 2450[/tex]
According to law of conservation of energy and substitution of values in formula gives,2540 joules as maximum kinetic energy.
What is law of conservation of energy?According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.Substitution in formula gives , PE=50×9.8×5=2540 J.
Thus, the maximum kinetic energy she can reach when she skis to the bottom of the slope is 2540 J.
Learn more about law of conservation of energy,here:
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