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
victus00 [196]
2 years ago
11

A person walks north for 5 miles, then south for 8 miles, and then north for 6 more miles. The entire trip takes 8 hours.

Chemistry
1 answer:
Zinaida [17]2 years ago
5 0

Answer:

I am not sure

Explanation:

You might be interested in
The net ionic equation for the reaction between aqueous sulfuric acid and aqueous sodium hydroxide is ________.
Kaylis [27]
Molecular equation:
H_{2}SO_{4}(aq) + 2NaOH(aq)--\ \textgreater \  Na_{2}SO_{4}(aq) + 2H_{2}O(l)

Complete ionic equation:

2H^{+}+SO_{4}^{2-} + 2Na^{+} +2OH^{-}--\ \textgreater \  2Na^{+}+SO_{4}^{2-} + 2H_{2}O(l)


Near 2H^{+},SO_{4}^{2-} ,  2Na^{+} , OH^{-} 

should be written (aq).

Remove ions that do not change from both sides

2H^{+} + 2OH^{-}=2H_{2}O

Net ionic equation:

H^{+}(aq) + OH^{-}(aq)=H_{2}O(l)

Answer is D.




8 0
3 years ago
When the number of protons and electrons are the same the atom is
belka [17]

A.)Neutral. Since amount of protons and electron are equal and amount of protons cannot be changed so it is stable or neutral.

5 0
3 years ago
Read 2 more answers
Solid substance A has a melting point of 100°C. Liquid substance B has a freezing point of 110°C. For each substance, identify i
9966 [12]

Answer:

both will be at liquid state. the particles will move rapidly in all directions and will collide with other particles in random motion

4 0
3 years ago
5. What concentration of acid must be added to change the pH of 1 mM phosphate buffer from 7.4 to 7.3 (pKas of the phosphate buf
mr_godi [17]

Explanation:

According to the Henderson-Hasselbalch equation, the relation between pH and pK_{a} is as follows.

               pH = pK_{a} + log \frac{base}{acid}

where,     pH = 7.4 and pK_{a} = 7.21

As here, we can use the pK_{a} nearest to the desired pH.

So,      7.4 = 7.21 + log \frac{base}{acid}

             0.19 = log \frac{base}{acid}

            \frac{base}{acid} = 1.55

1 mM phosphate buffer means [HPO_{4}] + [H_{2}PO_{4}] = 1 mM

Therefore, the two equations will be as follows.

           \frac{HPO_{4}}{H_{2}PO_{4}} = 1.55 ............. (1)

  [HPO_{4}] + [H_{2}PO_{4}] = 1 mM ........... (2)        

Now, putting the value of [HPO_{4}] from equation (1) into equation (2) as follows.

             1.55[H_{2}PO_{4}] + [tex][H_{2}PO_{4}] = 1 mM

                        2.55 [H_{2}PO_{4}] = 1 mM

                             [H_{2}PO_{4}] = 0.392 mM

Putting the value of [H_{2}PO_{4}] in equation (1) we get the following.

                     0.392 mM + [HPO_{4}] = 1 mM

                          [HPO_{4}] = (1 - 0.392) mM

                              [HPO_{4}] = 0.608 mM

Thus, we can conclude that concentration of the acid must be 0.608 mM.

7 0
3 years ago
You can shift weight to the front of your vehicle by __________ .
poizon [28]
C. Accelerating should be the correct onw
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which element has no stable isotopes?<br>1. CO27<br>2. Sb51<br>3. TH90<br>4. Pb82<br>​
    12·1 answer
  • The model of the atom that describes electrons scattered throughout a ball positive charge was proposed by
    6·1 answer
  • The average radius of a molecule of lysozyme, an enzyme in tears, is 1.430 *10^-3 um. What is its radius in millimeter? Enter yo
    6·2 answers
  • And atom that has fewer neutrons and protons and more electrons than protons is a what ion
    13·1 answer
  • Does it take faster for sugar or color (tint) to dissolve in water and WHY?
    6·1 answer
  • A certain first-order reaction (A→products) has a rate constant of 8.10×10−3 s−1 at 45 ∘C. How many minutes does it take for the
    12·1 answer
  • Which ball has the most energy?
    5·2 answers
  • Date
    11·1 answer
  • Chemistry mixes 108 g of O2, with 232 L of C3Hg at STP. How many grams of H2O will be produced? The balanced equation for this r
    10·1 answer
  • Can the element gold kick out magnesium from a compound?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!