Login
Remember
Register
Science Q&A Sarvan.Net
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Categories
Users
Ask a Question
About Us
XML Sitemap
Terms of Service
User KaiRazo33412
Wall
Recent activity
All questions
All answers
Ask a Question
Answers by KaiRazo33412
0
votes
55
views
Here is a problem related to Hess's Law for the student to solve:Suppose you are given the following three equations, each with their respective enthalpy change: (1) 2H2(g) + O2(g) --> 2H2O(l) ΔH₁ = -572 kJ/mol (2) 2H2O(l) --> 2H2(g) + O2(g) ΔH₂ = 472 kJ/mol (3) C(s) + O2(g) --> CO2(g) ΔH₃ = -394 kJ/molUse Hess's law to calculate the enthalpy change (in kJ/mol) for the following reaction: C(s) + 2H2(g) --> CH4(g)
answered
Feb 4
in
Chemical reactions
0
votes
77
views
What are the main challenges faced by chemistry students in understanding the periodic table and how can these challenges be overcome?
answered
Jan 30
in
Chemical education
0
votes
79
views
Identify the unknown compound using mass spectrometry for a sample that has a molecular ion peak of m/z 167 and fragmentation peaks of m/z 150, 135, 77 and 49.
answered
Jan 30
in
Analytical Chemistry
0
votes
50
views
Calculate the heat of adsorption of hydrogen gas on a platinum surface given the initial temperature of the system is 298 K and the final temperature is 330 K. The mass of the platinum surface used is 5 grams, and the amount of hydrogen adsorbed is 0.01 moles. Assume the heat capacity of the system is constant at 25 J/K.
answered
Jan 23
in
ThermoChemistry
0
votes
56
views
A chemical engineer needs to separate a mixture of ethanol and water using a distillation column. The feed to the column has 30 mol% ethanol and 70 mol% water, and the desired distillate composition is 95 mol% ethanol. The feed rate is 100 kmol/hour and the reflux ratio is 2. Calculate the number of theoretical trays required in the column to achieve the desired distillate composition.
answered
Jan 22
in
Chemical engineering
0
votes
36
views
Why is it important to evaluate the validity and reliability of psychological assessment tools?
answered
Jan 16
in
Psychology
0
votes
18
views
What is the difference between demand characteristics and experimenter bias?
answered
Jan 15
in
Psychology
0
votes
64
views
What is the role of relationships in existential psychology?
answered
Jan 15
in
Psychology
0
votes
28
views
What is disorganised attachment?
answered
Jan 14
in
Psychology
0
votes
17
views
What is the difference between a dependent variable and an independent variable?
answered
Jan 13
in
Psychology
0
votes
71
views
What is community psychology?
answered
Jan 13
in
Psychology
0
votes
29
views
Where does the process of digestion start?
answered
Jan 8
in
Science
0
votes
31
views
Which type of diseases do antibiotics treat?
answered
Jan 8
in
Science
0
votes
47
views
What is the term for atherosclerosis of arteries that supply the heart muscle?
answered
Jan 7
in
Science
0
votes
18
views
Pure substances have a constant composition and can only be changed through what?
answered
Dec 31, 2024
in
Science
0
votes
69
views
Locus refers to the position of what on a chromosome, which controls the characteristics of an organism?
answered
Dec 31, 2024
in
Science
0
votes
30
views
Cardiac veins parallel the small cardiac arteries and generally drain into what sinus?
answered
Dec 30, 2024
in
Science
0
votes
39
views
An unbalanced force on an object in motion causes what?
answered
Dec 30, 2024
in
Science
0
votes
73
views
An atom that gains or loses electrons is called what?
answered
Dec 30, 2024
in
Science
0
votes
14
views
What is the process of oxidized iron that has been exposed to air and water?
answered
Dec 28, 2024
in
Science
Page:
« prev
1
2
35.9k
questions
35.7k
answers
2
comments
7.0k
users
Categories
All categories
Science
(12.0k)
Psychology
(10.5k)
Chemistry
(13.4k)
Welcome to Sarvan Science Q&A, where you can ask questions and receive answers from other members of the community.
...