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
NARA [144]
3 years ago
14

If 655j are added to ethanol (grain alcohol) and its temperature rises from 18.2 C to 32.8 C, what is the mass of the ethanol sa

mple?
Chemistry
1 answer:
WARRIOR [948]3 years ago
5 0
G= 6.96 kcal/g is the answer to the question


You might be interested in
PLEASE HELP!<br><br> Count the total number of atoms in H 2 O:<br><br> 2<br> 3<br> 4<br> 5<br> 6
Darya [45]
3
two hydrogen and 1 oxygen
8 0
2 years ago
Read 2 more answers
How do we balance Zn + HNO3 Zn(NO3)2 + NO + H20​
USPshnik [31]

3Zn + 8HNO₃⇒ 3Zn(NO₃)₂ + 2NO + 4H₂O

<h3>Further explanation </h3>

Equalization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:  

  • 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.  
  • 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product  
  • 3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:  

Balancing C atoms, H and the last O atoms

Reaction

Zn + HNO₃⇒ Zn(NO₃)₂ + NO + H₂O

  • 1. gives a coefficient

aZn + bHNO₃⇒ Zn(NO₃)₂ + cNO + dH₂O

  • 2. make an equation

Zn : left = a, right =1 ⇒a=1

H : left = b, right = 2d⇒ b=2d (eq 1)

N : left = b, right = 2+c⇒b=2+c (eq 2)

O : left = 3b, right = 6+c+d ⇒3b=6+c+d(eq 3)

  • From eq 1 and eq 3

3(2d)=6+c+d

6d=6+c+d

5d=6+c (eq 4)

  • From eq 2 and eq 3

3(2+c)=6+c+d

6+3c=6+c+d

2c=d (eq 5)

  • From eq 4 and eq 5

5(2c)=6+c

10c=6+c

9c=6

c = 2/3

  • input eq 5

d = 2 x 2/3

d = 4/3

  • input eq 1

b = 2 x 4/3

b = 8/3

The equation

aZn + bHNO₃⇒ Zn(NO₃)₂ + cNO + dH₂O to

Zn + 8/3HNO₃⇒ Zn(NO₃)₂ + 2/3NO + 4/3H₂O x 3

3Zn + 8HNO₃⇒ 3Zn(NO₃)₂ + 2NO + 4H₂O

8 0
3 years ago
The atom in a sample of an element must contain nuclei with the same number of?
slava [35]
Hey there! 

Answer: Protons 

The atom in a sample of an element must contain nuclei with the same number of protons. If the protons change in number, then the element will modify as well. 

Thank you!
7 0
3 years ago
List the official SI units
Juli2301 [7.4K]

Answer:

The seven SI base units, which are comprised of:

Length - meter (m)

Time - second (s)

Amount of substance - mole (mole)

Electric current - ampere (A)

Temperature - kelvin (K)

Luminous intensity - candela (cd)

Mass - kilogram (kg)

Explanation:

7 0
3 years ago
Read 2 more answers
Which of the following is required to change the state of matter?
nignag [31]
Since there are no given items, I will give a general answer. Energy....or the lack of it. Examples: Heat, electricity, force (when an item is moving and it impacts something, it heats up...friction is an example of this), etc
3 0
2 years ago
Read 2 more answers
Other questions:
  • Which substance can be broken down by chemical means?
    12·2 answers
  • What mass of nitrogen is required to react with 16 grams of oxygen?
    6·1 answer
  • In a chemical reaction, the elements magnesium and chlorine combined to form magnesium chloride (MgCl2). Which statement
    10·1 answer
  • In what orbital would to valence electrons of strontium be found? a.) 5s b.) 4s c.) none d.) 5p​
    12·1 answer
  • What is a heterogenous mixture?
    5·1 answer
  • What ions are released when water is mixed with a base?​
    6·1 answer
  • Elements are organized into groups / families according to their physical and chemical properties. Identify the elements that's
    15·1 answer
  • Examples of elements<br>​
    7·1 answer
  • In 1676, Robert Plot discovered a large bone in a quarry in Cornwall, England. He observed that the bone looked similar to a hum
    5·1 answer
  • 1. The attraction between the hydrogen atom in one water molecule and the oxygen molecule in another is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!