Oxygen (2) element name
Answer:
Oxygen has two allotropic forms, diatomic (O₂) and triatomic (O₃, Ozone).
-TheUnknownScientist
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.
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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how does Arizona's climate relate to the air and ocean currents?
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!
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
Answer:
C
Explanation:
Brainliest
I tried my best
is NaHCO3 a binary compound
Answer:
No
Explanation:
Binary compounds contain only 2 distinct elements.
For example magnesium oxide MgO is a binary compound.
NaHCO3 contains 4 distinct elements.
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)?
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
A scientific is a statement that explains what always happens under very specific conditions.
O hypothesis
conclusion
a
theory
O
law
Answer:
law
Explanation:
que es la nanotecnologia ?
porfis lo nesecito urgente para antes de las 10
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
What type of chemical reaction does this equation represent?
Ag2S + KCN --> AgCN + K2S
The power of the crane was 68600 W
Caculate the time taken for the crane to do 3430000 J of work
Give the unit
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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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) :))
Answer:
deflection,Coriolis effect
hope this helps
two ways the rate of a reaction be monitored
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.
What is the elevation of point x on rock mountain ( Ik it's blury but please help for 30 points ) ty
Explanation:
A contour map shows two locations, X and Y, 5 kilometers apart. The elevation at location X is 800 meters and the elevation at location Y is 600 meters.
A neutral atom has a ground state electron configuration of 1s22s22p63s2.The neutral atom becomes an ion during a chemical reaction.Which is the most likely charge of the ion
Answer:
+2
Explanation:
the atom will acquire the noble gas configuration if it loses 2 electrons, becoming a divalent cation
can someone help me sort this :(
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:
Which of the following statements are true?
a.
Visible light is composed of different wavelengths.
b.
The shorter the wavelength, the more refraction occurs.
c.
Different wavelengths refract at different angles.
d.
All of the above.
Which of the following relationships is true?
A. pH − pOH = 14
B. Ka × Kb = 1 × 10-14
C. pKa × pKb = 14
D. pKa × pKb = 1 × 10-14
Answer:
D. pKa × pKb = 1 × 10-14
Explanation:
hope this helps, if not, give me time to edit
Answer:
B. Ka × Kb = 1 × 10-14
Explanation:
yw
What is the molality of an acetic acid solution that contains 0.500 mol of HC2H3O2 (molar mass: 60g/mol) in 0.800 kg of water?
Answer: The molality of given acetic acid solution is 0.625 m.
Explanation:
Given: Moles of solute = 0.5 mol
Mass of solvent = 0.8 kg
Molality is the number of moles of solute present in a kg of solvent.
Therefore, molality of the given solution is calculated as follows.
[tex]Molality = \frac{moles}{mass of solvent}[/tex]
Substitute the values into above formula as follows.
[tex]Molality = \frac{moles}{mass of solvent}\\= \frac{0.5 mol}{0.8 kg}\\= 0.625 m[/tex]
Thus, we can conclude that the molality of given acetic acid solution is 0.625 m.
what type of heat is it when a handle of a saucepan get hot when it is on the stove
Answer:
A conduct heat
Explanation:
because in cooking burners on stove will conduct heat energy to the bottom of the pan sitting on top of it. From there, the pan conducts heats to it content.
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:))
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
Explanation:
A) fission: Iodine-140 (atomic number = 53)
B) fusion: 1 neutron
C) fission: Uranium-233 (atomic number = 92)
Mg + 2HCl → MgCl2 + H2
How many grams of Mg is needed to produce 100 g of H2?
H2
n=m÷Mr
n=100×2
n=200 moles
Mole ratio
Mg : H2
1 : 1
x : 200
cross multiply= x=200
Mg
make m the subject
m=n×Mr
m=200×24.305
m=4861 g
What is anything has mass and volume called?
Answer:
Matter
Explanation:
It has mass and it takes up space
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.
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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how many moles are 2.54 x 10^29 molecues of H2O
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.
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.
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
Answer:
dark brown with a hint of purple
have a good day :)
Explanation:
solute separates as a solid when a saturated solution is cooled why
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.
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.
Answer:
B)Stabilizes the body
...........................
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
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