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
Leni [432]
3 years ago
15

PLEASEEEEE HELP PLEASEEEEEEE

Chemistry
2 answers:
seropon [69]3 years ago
8 0
I don’t really know to be honest
Volgvan3 years ago
8 0
I can’t really see the designs clearly .

but other than that have a good day !
You might be interested in
A fruit and oatmeal bar contains 142 nutritional calories. Convert this energy to calories
Alekssandra [29.7K]
Answer is: a<span> fruit and oatmeal bar contains 142000 calories.
</span>A nutritional calorie<span>, or kilocalorie, is equal to 1000 calories.
</span>E = 142 kcal · 1000 cal/kcal.
E = 142 000 cal.
Calorie (cal)<span>, or small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius.
</span><span>One small calorie is approximately 4.2 joules.
</span>A calorie is a unit of energy.
8 0
3 years ago
The enthalpy of a pure liquid at 75oC is 100 J/mol. The enthalpy of the pure vapor of that substance at 75oC is 1000 J/mol. What
pentagon [3]

Answer:

900 J/mol

Explanation:

Data provided:

Enthalpy of the pure liquid at 75° C = 100 J/mol

Enthalpy of the pure vapor at 75° C = 1000 J/mol

Now,

the heat of vaporization is the the change in enthalpy from the liquid state to the vapor stage.

Thus, mathematically,

The heat of vaporization at 75° C

=  Enthalpy of the pure vapor at 75° C - Enthalpy of the pure liquid at 75° C

on substituting the values, we get

The heat of vaporization at 75° C = 1000 J/mol - 100 J/mol

or

The heat of vaporization at 75° C = 900 J/mol

8 0
4 years ago
What is hair made out of and how does it grow ? lol yah ik its kind of a stupid question
Rasek [7]
Hair is dead skin cells that pile on top of each other to "grow".

3 0
4 years ago
Describe polar covalent bonds using water as an example
Dahasolnce [82]
<span>A covalent bond is a bond formed by atom sharing.
In water molecule, there are twice the number of hydrogen atoms than the oxygen atoms. Its structure is H-O-H. The electronegative difference between the H and O allows them to be polar because on side there is positive charge and on another side there is negative charge.</span>
3 0
3 years ago
I need help whats 1.09 g/mL to lbs/gal
storchak [24]
9.096491 lbs/gal hope it helps
3 0
3 years ago
Other questions:
  • Find the mass in 2.6 mol of lithium bromide. (Hint:  You need to write the formula)
    8·1 answer
  • I NEED HELP PLEASE, THANKS! :)
    9·1 answer
  • An oxide of nitrogen is 25.9% N by mass, has a molar mass of 108 g/mol, and contains no nitrogen-nitrogen or oxygen-oxygen bonds
    8·1 answer
  • An object resting on a table weighs 100 N. With what force is the object pushing on the table? With what force is the table push
    12·1 answer
  • True or False Bay is an estuary that contains diverse organisms​
    15·1 answer
  • Force F with arrow = (9.0 N)i hat − (9.0 N)k acts on a pebble with position vector r with arrow = (0.90 m)j − (1.2 m)k relative
    5·1 answer
  • We can also use the equation for enthalpy change for physical phase changes. Consider the phase change H2O(l) → H2O(g). Calculat
    15·2 answers
  • Anyone really good with Organic chemistry
    10·1 answer
  • The pKa of a weak acid was determined by measuring the pH of a solution containing the weak acid at 0.40 M and its conjugate bas
    7·1 answer
  • A 3.00 L flexible container holds a sample of hydrogen gas at 153 kPa.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!