Answers
Answer:
C is the correct answer 35% and 9%
Related Questions
cell are the blank unit of all living organisms
Answers
What does the word photosynthesis mean?
PIC IS BELOW!
Answers
1) El CO2 que los astronautas exhalan se extrae de la atmósfera de la nave espacial por reacción con KOH según la reacción: CO2 (g) + 2 KOH (l) → K2CO3 (s) + H2O (l) a) Cúantos gramos de CO2 se pueden extraer con 500 g de KOH ? b) Cuántos gramos de agua se producen? 2) Cuando se hacen reaccionar hidrógeno y nitrógeno se produce amoniaco, un fertilizante benéfico para las plantas. ¿Cuántos moles de hidrógeno se requieren para que reaccionen con 12.75 moles de nitrógeno? La reacción es la siguiente: N2 + 3 H2 → 2NH3 3) El propano (C3H8) es usado como combustible en los hogares, reacciona con el oxigeno para producir dióxido de carbono (CO2) y agua (H2O) mediante la siguiente reacción: C3H8 + 5 O2 → 3 CO2 + 4 H2O a) Si se queman 2 Litros de propano (C3H8) calcula los litros de CO2 que se emiten a la atmósfera.
Answers
Answer:
a. 4.46 moles de CO₂
b. 80.2 g de H₂O
38.25 moles de H₂
5.55 L de dióxido de carbono
Explanation:
Comenzamos con la reacción: CO₂ (g) + 2 KOH (l) → K₂CO₃ ↓ (s) + H₂O (l)
a. Podemos ver que la relación estequiométrica es 2 a 1.
Pasamos la masa de KOH a moles → 500 g . 1mol/ 56.1g = 8.91 moles
2 moles de KOH necesitan 1 mol de dióxido
Entonces, 8.91 moles necesitarán (8.91 . 1)/2 = 4.46 moles
Convertimos los moles en masa → 4.46 mol . 44g /1mol = 196 g de CO₂
b. Como no tenemos información de los reactivos, trabajamos con el KOH (recorda que siempre hacemos los cálculos con el reactivo limitante).
La relacion estequiometrica también es 2 a 1.
Con 2 moles de KOH producimos 1 mol de agua
Entonces 8.91 moles producirán la mitad, 4.46 moles
Pasamos a gramos → 4.46 mol . 18g /1mol = 80.2 g de H₂O
N₂ + 3H₂ → 2NH₃
En esta relacion, la relación de moles es 1 a 3.
1 mol de N₂ necesita 3 moles de H₂ para llevar a cabo la reacción
12.75 moles de nitrogeno reaccionarán con (12.75 . 3)/ 1 = 38.25 moles de H₂
La siguiente es una reacción de combustión:
C₃H₈ + 5O₂ → 3 CO₂ + 4 H₂O
Como en este caso tenemos volumen, necesitamos averiguar la densidad del propano para sacar la masa y de ahi los moles:
Densidad del propano es 1.83 g/L
Si tenemos 2 Litros de gas, entonces tendremos el doble de masa
2L . 1.83 g/L = 3.66 g
Convertimos a moles → 3.66 g . 1 mol/44g = 0.083 moles
1 mol de propano produce 3 moles de dióxido.
0.083 moles producirán (0.083 .3) /1 = 0.249 moles
Convertimos a gramos → 0.249 moles . 44g/ 1mol = 10.98 g
La densidad del CO₂ es 1.976 g/L
d = m/V → V = m/d → 10.98 g / 1.976 L = 5.55 L
what are the resulting elements and compounds of a chemical reaction called?
i need the answer in 2 minutes.
Answers
Answer:these starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products
Explanation:I hope this helps
A prescription is written for 500 mL of a 7% NaCl solution. The technician has a 50% NaCl solution. What volume of
50% NaCl is required for the 7% solution?
mL
Answers
Answer:
70 mL
Explanation:
To solve this problem we can use the C₁V₁=C₂V₂ equation, where the subscript 1 refers to the concentrated solution while subscript 2 refers to the diluted one, as follows:
C₁ = 50V₁ = ?C₂ = 7V₂ = 500 mLWe input the data:
50 * x = 7 * 500 mLAnd solve for x:
x = 70 mLThus the answer is 70 mL.
what happens if i give all my points on my next question?
Answers
Answer:
you wont be able to ask any more questions until you answer some bc you get points from answering questions but you loose points when you ask them
Explanation:
Answer:
Good thing:)
The Bermuda Triangle, also known as the Devil's Triangle, is a loosely defined region in the western part of the North Atlantic Ocean where a number of aircraft and ships are said to have disappeared under mysterious circumstances. Most reputable sources dismiss the idea that there is any mystery.Bermuda TriangleDevil's TriangleEnergy in a chemical reaction can be identified as which of the following?
A.) Heat
B.) Light
C.) ∆H
D.) 2,000Kj
E.) All of the above
Answers
Two rabbit species, X and Y, live in an Arctic environment that is also populated by wolves. Species x turns white in the winter and
brown in the spring. Species y stays brown all year. The population of species X has slowly been increasing over the population of
species Y. What is most likely causing this population change?
Answers
Answer:
yy
Explanation:
advantages of solar energy
Answers
reduces electric bills
low maintenance costs
reduced needs for fossil fuels and foreign oils
PLS HELP ASAP Solar energy causes most of the water ___________________ on Earth’s surface?
Answers
The specific heat of liquid H2O is 4.184 J/g°C. If 32.7 grams of water are heated from
12 °C to 77 °C, how much energy is required?
Look at picture
ASAP please will mark as brainlist don’t got much time
Answers
Answer:
8893.092J
Explanation:
energy= mass × specific heat capacity of water × change in temperature
=32.7×4.184×(77-12)
=8893.092J
Can somebody sort these from non-metals to metals?
Sonorous, low melting point, high density, brittle, dull, malleable, basic oxide
Answers
Low melting point- nonmetal
High density- metal
Brittle-metal
Dull-nonmetal
Malleable-metal
Basic oxide-metal
Correct me is I’m wrong :)
Which of the following is
NOT a part of the digestive
system?
A
Mouth
B Esophagus
C Intestines
D
Kidneys
1137 AM
o search
B
Answers
Answer:
Kidneys
Explanation:
I learned about it :)
Answer:
DkidneysExplanation:
I hope it helps
Calculate AH for the following reaction.
C2H4(g) + H2(g) → C2H6(g)
(ΔHf° for C2H4(g) = 52.5 kJ/mol; ΔHf° for C2H6(g) = -84.7 kJ/mol)
a. -137.2 kJ
b. -32.2 kJ
c. 32.2 kJ
d. 137.2 kJ
Answers
Answer:
a.-137.2 kJ
Explanation:
If the first example symbol used is addition you can copy the plus and follow it how to solve the next!And also if the negative or positive sign.
please help im failing
Answers
Answer:
the second one
Explanation:
because there are 3 of Na and one N
Convert from: 689 m =____mm*
(Metric Conversion chart)
A. 68,900 mm
B. 689,000 mm
C. 0.689 mm
D. 0.000689 mm
Answers
Answer:
b) 689,000mm
as 1m= 1000mm
Answer:
A
Explanation:
mark me brainlisted please
80 foot-pounds of work is needed to move the sofa in Tyler's apartment. Which of the following statements is true?
Answers
Select the correct answer.
Which substance is most likely to form in a precipitation reaction?
A.
calcium nitrate
B.
copper(I) nitrate
C.
iron(I) chloride
D.
iron(II) sulfide
E.
potassium sulfate
Answers
Answer:
C.
Explanation:
Iron is most likely to form a precipitation reaction.
PLEASE HURRY IM TIMED Atoms are made up of electrons, neutrons, and____?
protons
compounds
mixtures
water
Answers
Answer: protons
Explanation:
A. Protons I learned this in class
Chemical bonds release energy when they break apart, and take in energy when they form. How does this observation help explain the energy released by burning wood?
Answers
Something that helps us to understand things that are too large or too small are called A. atoms B. molecules C. models D . compounds
Answers
the spectral classes of four stars are shown in comparison with a Hertzsprung-Russell diagram. Based on the information which star is most like the sun?
Answers
Answer: star 3
Explanation: i did the test
Answer: star 3
Explanation:I did the test
Is the following statement true or false:
Cellular respiration only occurs in animal cells.
Question 1 options:
True
False
Answers
Answer:
False
Explanation:
Humans and plans do it as well
Answer:
False
Explanation:
Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.
Conductivity is the
1.ability of a solute to dissolvein a solven
2. ability of substances to allow electrons to flow
3. ability of particles to disperse evenly into another substance
4.inability of particles to disperse evenly into another substance
Answers
Answer:
I'm pretty sure its 2
Explanation:
because that's the only on that makes sense
How many atoms are in 100g H2O ?
Answers
Answer:11
explain
: cause i think it is
help please asap. chem sucks
Answers
I'm assuming that C is carbon.
[tex]4.590 \: mol \: c \times \frac{12.01 \:g \: c}{1 \: mol \: c} [/tex]
55.1259 g of C
Where does the light we see from the moon come from?
Answers
CuCl2 + NaNO3 -------> Cu(NO3)2 + NaCl
Answers
Answer:
what
Explanation:
Under what conditions would pressure affect the reaction rate?
O A. If the reaction requires the use of a catalyst
B. If the reaction takes place between a solid and a liquid
C. If the reaction is between two liquids
O D. If the reaction occurs in the gas phase
Answers
what? what do you want
The apparatus which cools the gas is called a ______. This changes a gas into a liquid.
Answers
Answer:
Condenser
Explanation:
A condenser is laboratory apparatus used to condense vapors — that is, turn them into liquids — by cooling them down. Condensers are routinely used in laboratory operations such as distillation, reflux, and extraction(Wikipedia).
Condensers of of practical importance especially in synthetic organic chemistry and in separation science where vapours are often condensed and collected the substance is collected in pure form by distillation.