Answer:
10.5 dm3 O2
0.94 moles de MgO
Explanation:
La pregunta dice explícitamente que el magnesio es puro en un 90%.
Por lo tanto, masa de magnesio puro = 90/100 * 25G = 22,5 g
Número de moles de Mg = 22,5g / 24g/mol = 0,94 moles de Mg
La ecuación de reacción es;
2Mg (s) + O2 (g) ------> 2MgO (s)
Si 2 moles de Mg reaccionan con 1 moles de O2
0.94 moles de Mg reacciona con 0.94 * 1/2 = 0.47 moles de O2
Si 1 mol de O2 ocupa 22,4 dm3
0.47 moles de O2 ocupan 0.47 * 22.4 / 1 = 10.5 dm3
También;
2 moles de Mg producen 2 moles de MgO
Entonces, 0.94 moles de Mg producen 0.94 moles de MgO
¿Cuántos moles de bióxido de Nitrógeno (NO 2) se forman cuando reaccionan 5 moles de Nitrógeno (N 2)?
Answer:
10 moles de NO2
Explanation:
Tenemos la ecuación de la reacción como sigue;
N2 (g) + 2 O2 (g) → 2 NO2 (g)
Asi que;
Si 1 mol de nitrógeno produce 2 moles de NO2
5 moles de nitrógeno producirán 5 * 2/1 = 10
Por tanto, se producen 10 moles de NO2 moles
The least polar bond is found in a molecule of hi hf hcl hbr
Answer:
HI is least polar
Explanation:
Calculate the molarity for a solution containing 0.34 moles of NaNO3 dissolved in 0.5 liter of
water.
Answer:
0.68 mol/L
Explanation:
M=m/l
m is moles and l is liters
Since they gave us the values in the correct units, all we have to do it plug it in
M=0.34 mol/0.5 liters
M=0.68
Oddly shaped bones like your vertebrae and pelvis? a.irregular bones c. short bones b. flat bones d. long bones
Which best represents a physical change?
A. formation of a new substance
B. formation of a precipitate
C. condensation
D. bubbling
Answer:
The answer I would go with is A formation of a new substance.
Explanation:
This is because physical change includes changes of state. Some could be changing from a liquid to gas or solid to gas. B is not even an answer that should be considered because it doesn't fit into the category. C and D represents some of the examples of the process of physical change. Like boiling, bubbling, melting, or freezing. So the best would be A.
What special label do you have to use when naming ionic compounds with transition metals?
A) Roman Numerals
B) Greek Numerals
Naming Ionic compounds with transition metals requires the use of a roman numeral. The charge of the metal ion must be written in the name of the compound with a roman numeral. This is because transition metals can have more than one valence (or charge).
A gas at 127 celsius and 10.0 L expands to 20.0 L. What is the new
temperature in kelvin? (You must convert to Kelvin before calculating
this problem
Answer:
T₂ = 800 K
Explanation:
Given that,
Initial temperature of the gas, T₁ = 127°C = 400 K
Initial volume, V₁ = 10 L
Final volume, V₂ = 20 L
We need to find the new temperature.
The volume of a gas is directly proportional to its Kelvin temperature.
Let T₂ is the new temperature. So,
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{20\times 400}{10}\\\\T_2=800\ K[/tex]
So, the new temperature of the gas is 800 K.
what is the first tropical cyclone of the year 2020 ?
Answer:
belajar jangan malas malasWhy have rainforest plants adapted to be a different shape and size than desert plants?
A
because rainforest plants are only raised in zoos
B
because in a rainforest environment, adaptation can happen overnight
с
because rainforest plants and desert plants need to store the same amount of
water
because the rainforest environment is different than the desert environment
Answer:
option D is correct answer of this question
option D is correct answer of this questionbecause the rainforest environment is different than the desert environment
option D is correct answer of this questionbecause the rainforest environment is different than the desert environment hope it will help
The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.
Adaption of the rainforest plants to the different shapes and size?
It can be like:
Drip tips - where plants contains leaves with pointy tips.Buttress roots - These contain large roots that have ridges that develop a large surface area. Epiphytes - It lives on the branches of trees high up in the canopy.hence, The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.
learn more about rainforest plants here: https://brainly.com/question/2170925?referrer=searchResults
How moles are in 45.7g of CH3?
first find the atomic weight of CH3 which would be
atomic weight: 12.011 (3×1.008) = 36.32 g/mol
then find the moles in the given mass
36.32 ÷ 45.7 = 0.794
I HOPE I'M NOT WRONG I HAVENT DONE CHEM IN SO LONG
Explain what a catalyst is and give an example of a transition as one.
Answer:
Catalyst, in chemistry, any substance that increases the rate of a reaction without itself being consumed.
...
Catalyst.
process catalyst
ammonia synthesis iron
sulfuric acid manufacture nitrogen(II) oxide, platinum
cracking of petroleum zeolites
A gas at a pressure of 360 torrs and a volume of 750 ml. If the pressure becomes 1.5 atm what is the new volume?
Answer:
V₂ = 236.84 mL
Explanation:
The relation between pressure and volume is inverse.
We can write it as follows :
[tex]P_1V_1=P_2V_2[/tex]
We have,
P₁ = 360 torrs, V₁ = 750 mL, P₂ = 1.5 atm = 1140 torr.
So,
[tex]V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{360\times 750}{1140}\\\\V_2=236.84\ mL[/tex]
So, the new volume of the gas is 236.84 mL.
Why are poisons used less today than they were in the past? What factors influenced this change.
Answer:
Poisons are used less today than they were in the past because forensic scientists can easily detect many substances and toxins during an autopsy.
The main factor that influenced this change is advancements in forensic toxicology knowledge and technology.
good luck, i hope this helps :)
Explanation:
Today poisons are used less because forensic scientists now have much more equipment and have an easier time at identifying poisons like arsenic, which were not so easy to find in the past. The main factor influencing this change is the new technology and knowledge that was unavailable in the past.
How many atoms of oxygen are in a molecule
of
glucose (C6H1206)?
Be sure to use the correct place value.
Answer:
Um... 6
Explanation:
C6H12O6
The O is oxygen and the 6 is the exact number of atoms
1.When two systems that have the same temperature are put in contact with each other, is there heat transfer going on?
2.When two systems that have different temperatures are put in contact with each other, is there going to be heat transfer? Explain.
Answer:
Sorry I don't know the answer of your question I am sorry.
what is the smallest unit of NaCl?
Answer:
A molecule of Nacl
Maybe
Where does condensation occur?
lithosphere (rocky, crust of earth)
atmosphere (clouds)
hydrosphere (lakes and oceans)
biosphere (where the living things are)
I need help pls I don’t know this kne
Answer:
C. A one (1) is assumed when there is no coefficient
Explanation:
The following chemical equation is given in the attachment:
2H2 + O2 → 2H2O
In this reaction, Hydrogen (H2) and oxygen (O2) gases are the reactants and they combine to form H2O, which is the product. It is necessary that, in accordance to the law of conservation of matter, the same number of atoms of each elements on the reactant side equates that on the product side. When this happens, the equation is said to be BALANCED.
However, to balance an equation, COEFFICIENTS are used. In this equation above, coefficients 2 is used in front of both H2 and H2O but no coefficient is used in front of O2. This is because 1 mole of oxygen is on the reactant and product side respectively. However, one is assumed when no coefficient is written i.e. O2 means 1 mole of oxygen molecule.
Will mark brainiest!!!! Also I posted other questions
Answer:
Crash sensors measure how quickly a vehicle slows down in a frontal crash or accelerates to the side in a crash Some vehicles are equipped with a sensing system designed to detect the onset of a rollover crash Rollover crash sensors may be located in the ecu or at the center of the vehicle
The the Crash trip sensors in cars that send an electric signal to an ignitor The heat generated causes sodium azide to decompose into sodium and nitrogen gas which inflates the airbags
Explanation:
have a nice day
If you are traveling at 40 miles per hour, how long will it take you to travel
80 miles?
Answer:
2hours
Explanation:
40miles=1hr
80miles=80÷40=2
2hours
how many days does it take one moon phase go to the next?
Answer:
1 month i believe sorry if im wrong
Explanation:
Help! Will give will give brainllest
1. An airplane flies 1431 miles in 2 hours 15 minutes. What is its average speed in miles per hour?
2. A train travels 76 miles in 1 7/12 hours. What is its average speed in miles per hour?
3. An airplane flies 1914 miles in 2 3/4 hours. What is its average speed in miles per hour?
4. A train travels 102 miles in 2 5/6 hours. What is its average speed in miles per hour?
5. Tracy runs 26.2 miles in 3 hours and 45 minutes. What is her average pace in minutes and seconds?
Answer:
1. 636miles/hour
2. 53.65milesper hour
3.696miles per hour
4.37.09mikes per hour
5. 6.99miles/hour
Explanation:
you first convert all the time into improper fractions
then work out speed which is got by dividing distance with time
A neutral atom has 12 protons. In chemical bonding, which is the most likely charge of the ion?
A. 2+
B. 1+
C. 2-
D. 6-
Students are completing an investigation on types of heat transfer. For one part of the investigation, they place their hand on a cool window and feel the difference in thermal energy. When they are touching the glass, what type of heat transfer are they experiencing?
a .Conduction
b. Convection
c. Radiation
6.
A crystal of the purple compound potassium manganate (VII) is placed at the bottom
of a beaker of water and the beaker left until there
is no further change. What will be
observed?
A a uniformly purple solution.
B
a purple layer below a colourless layer.
С a colourless layer below a purple layer.
D a deep purple layer below a pale purple layer.
Sec 3/KPT and SMS/2021
Page 2 of 3
Answer:
I don't know
Explanation:
sorry i just need point to ask so i have comment
0.3747x + 11.598 pls help meeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
that isn't a full equation but I will assume this is = to 0
that makes x 30.95
Explanation:
Help please I have 10 min.
____ NaF + ____ Br2 à ____ NaBr + ____ F2
A. ---, 2, 2, ---
B. 2, ---, ---, 2
C. 2, ---, 2, ---
Answer:
2 NaF + Br2 --> 2NaBr + F2
Explanation:
Well first I notice that there are two flourines on the products side so we need to put a 2 of NaF. Now there are 2 sodiums on the products side so we have to put another two in front of NaBr.
2 NaF + Br2 --> 2NaBr + F2
PLEASE HELP ME!! ILL GIVE BRAINLIEST PLEASE HELP IMMEDIATELY
what can you infer about a wave with a short wave leagth
Answer:
It has a high frequency
Explanation: