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
QveST [7]
2 years ago
8

Which statement is an opinion?

Chemistry
2 answers:
Zepler [3.9K]2 years ago
8 0
C. or A. Is your best bet

inna [77]2 years ago
7 0
C is definitely the answer
You might be interested in
Select the correct answer.
timofeeve [1]

Answer:

D

Explanation:

4 0
3 years ago
Read 2 more answers
M. element<br>cenabrecht<br>0.5 mele of an​
drek231 [11]

Answer:

Number of moles (n)=

molecular weight

weight

Weight=n×Molecular weight

=0.5×14

Mass=7g

5 0
3 years ago
Which statement is true for all minerals
nekit [7.7K]

What are the answer choices


8 0
2 years ago
Good morning, I have a question..
matrenka [14]

Answer:

<h3>The answer is 5.24 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question

mass = 152 g

density = 29 g/cm³

We have

volume =  \frac{152}{29}  \\  = 5.24137931...

We have the final answer as

<h3>5.24 mL</h3>

Hope this helps you

7 0
3 years ago
Given the following heats of combustion. CH3OH(l) + 3/2 O2(g) CO2(g) + 2 H2O(l) ΔH°rxn = -726.4 kJ C(graphite) + O2(g) CO2(g) ΔH
sergeinik [125]

Answer:

The standard enthalpy of formation of methanol is, -238.7 kJ/mole

Explanation:

The formation reaction of CH_3OH will be,

C(s)+2H_2(g)+\frac{1}{2}O_2\rightarrow CH_3OH(g),\Delta H_{formation}=?

The intermediate balanced chemical reaction will be,

C(graphite)+O_2(g)\rightarrow CO_2(g), \Delta H_1=-393.5kJ/mole..[1]

H_2(g)+\frac{1}{2}O_2(g)\rightarrow H_2O(l), \Delta H_2=-285.8kJ/mole..[2]

CH_3OH(g)+\frac{3}{2}O_2(g)\rightarrow CO_2(g)+2H_2O(l) , \Delta H_3=-726.4kJ/mole..[3]

Now we will reverse the reaction 3, multiply reaction 2 by 2  then adding all the equations, Using Hess's law:

We get :

C(graphite)+O_2(g)\rightarrow CO_2(g) , \Delta H_1=-393.5kJ/mole..[1]

2H_2(g)+2O_2(g)\rightarrow 2H_2O(l) ,\Delta H_2=2\times (-285.8kJ/mole)=-571.6kJ/mol..[2]

CO_2(g)+2H_2O(l)\rightarrow CH_3OH(g)+\frac{3}{2}O_2(g) ,\Delta H_3=726.4kJ/mole [3]

The expression for enthalpy of formation of C_2H_4 will be,

\Delta H_{formation}=\Delta H_1+2\times \Delta H_2+\Delta H_3

\Delta H=(-393.5kJ/mole)+(-571.6kJ/mole)+(726.4kJ/mole)

\Delta H=-238.7kJ/mole

The standard enthalpy of formation of methanol is, -238.7 kJ/mole

4 0
2 years ago
Other questions:
  • Twenty-seven milliliters of an acid with an unknown concentration are titrated with a base that has a concentration of 0.55 M. T
    10·2 answers
  • Weather is an important environmental factor that affects life on earth. Which of the following human activities impacts the wea
    8·2 answers
  • Which is a possible result of rising ocean temperatures caused by global warming?
    5·1 answer
  • For the following isotopes that have missing information, fill in the missing information to complete the notation: 34 14X
    15·1 answer
  • What causes a pendulum to move in an extended amount of time?
    9·1 answer
  • What is the measurement?
    8·1 answer
  • What kind of structure do the cations and anions in table salt form
    7·1 answer
  • Describe three findings of the Human Genome Project<br> Write it in your own words
    12·1 answer
  • Which of these best describe a flight that is approaching the speed of sound
    15·1 answer
  • Zeolite A, [(AlO₂)₁₂(SiO₂)₁₂] .27 H₂O, is used to soften water by replacing Ca²⁺ and Mg²⁺ with Na⁺. Hard water from a certain so
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!