1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alborosie
3 years ago
13

PLEASE HELP ASAP!!!

Chemistry
2 answers:
Softa [21]3 years ago
6 0

1 CH4 (g) + 2 O2 (g) -----> CO2 (g) + 2H2O(l) ΔH= - 890 kJ

1 mol           2 mol

1)  If ΔH has minus, it means "release". We need only "release" choices.

2) From reaction

1 mol CH4 (g)  "releases"  ΔH= - 890 kJ  - We do not have this choice.


2 mol  O2 (g)   "release" ΔH= - 890 kJ, so

1 mol  O2 (g)   "release" ΔH= - 445 kJ

Correct answer is B.



1

kogti [31]3 years ago
3 0
1 CH4 (g) + 2 O2 (g) -----> CO2 (g) + 2H2O(l) ΔH= - 890 kJ
1 mol           2 mol
1)  If ΔH has minus, it means "release". We need only "release" choices.<span>
2) From reaction
1 mol </span>CH4 (g)  "releases"  ΔH= - 890 kJ  - We do not have this choice.

2 mol  O2 (g)   "release" ΔH= - 890 kJ, so
1 mol  O2 (g)   "release" ΔH= - 445 kJ
Correct answer is B.
You might be interested in
3.80 moles of oxygen are used up in the reaction. How many moles of water are produced?5.How many grams of oxygen does it take t
r-ruslan [8.4K]

Answer:

2 KClO3 (s) = 2 KCl (s) + 3 O2 (g)

2.5 g x g

Explanation:

x g O2 = 2.5 g KClO3 x (1 mol KClO3) x (3 mol O2) x (32 g O2) = 0.98 g O2

(122.5 g KClO3) (2 mol KClO3) (1 mol O2)

2 KClO3 (s) 2 KCl (s) + 3 O2 (g)

2.5 g x g

x g KCl = 2.5 g KClO3 x (1 mol KClO3) x (2 mol KClO3) x (74.5 g KCl) = 1.52 g KCl

(122.5 g KClO3) (2 mol KClO3) (1 mol KCl)

2 KClO3 (s) 2 KCl (s) + 3 O2 (g)

x mol 10 mol

x mol KClO3 = 10 mol O2 x (2 mol KClO3) = 6.7 mol KClO3

(3 mol O2)

7 0
3 years ago
How many atoms of both elements are there in this molecule: 3N205; O 3 Nitrogen and 15 Oxygen 6 Nitrogen and 5 Oxygen KD 2 Nitro
abruzzese [7]

Answer:

Explanation:

oxygen is a 15 and nitrogen science chemistry i'm guessing

6 0
3 years ago
Finish the lyrics.
pav-90 [236]
Kg it it ig itchy it ig ig igxgixigxigc
8 0
3 years ago
0.5832 miles =____ft and ___ inches​
arlik [135]

Answer:

0.5832 miles =3079ft and 3.552 inches​  

Explanation:

This is if you are wanting the foot amount and the extra in inches, if you are wanting it in just feet and just inches it would be 3079.296 feet and 36951.552 inches

3 0
3 years ago
Which is capable of housing while they conduct research
jeka94

Answer:

A space station

Explanation:

A space station provides an avenue for scientist to orbit the space and carryout scientific findings. Most space stations are usually controlled under agreement between different countries. The international space station is one such example.

A rover is usually a robotic device that has been pre-programmed and equipped with state of the art devices to carryout explorations on their own.

Most space observations are usually powerful telescopes on the earth surface that monitors events in space.

A satellite is a body that orbits another.

4 0
3 years ago
Read 2 more answers
Other questions:
  • A vessel of volume 22.4 dm3 contains 2.0 mol h2 and 1.0 mol n2 at 273.15 k initially. all the h2 reacted with sufficient n2 to f
    13·1 answer
  • Which quantity is used to generate the error bars on a graph?
    11·1 answer
  • The mass of an object is described in
    5·1 answer
  • What is the concentration of H+ ([H+]) of a solution with a pH of 2.5 ?
    11·1 answer
  • How does symmetry extend to our senses
    8·1 answer
  • What is the formula of nitric acid in science
    7·1 answer
  • What 4 characteristics do all animals have?
    15·2 answers
  • What is the conversion of 12.044x10^23 to a gram
    13·1 answer
  • Amestec 140 g solutie 9% cu 260 g solutie 12%, cu 60 g apa si x g solutie 4%. Ce c procentuala are noua solutie %?
    5·1 answer
  • How did modern scientists experiment with Van Gogh's paints to determine their chemical reactions?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!