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
sashaice [31]
3 years ago
6

Need help for number 4. do i use the q=mc DELTA T equation or the q=mHfusion?

Chemistry
1 answer:
Natasha2012 [34]3 years ago
7 0
Since it is a phase change, use the mHfusion equation.
You might be interested in
A substance with a density of 2.70 g/mL occupies a volume of 21.3 mL. What is the mass of the sample? Report your answer in unit
katen-ka-za [31]
We know the formula of the density:
ρ =\frac{m}{V} ;
So the mass will be equal to:
m = ρ * V = 2.70  * 21.3 = 57,51 g = 57510 mg of substance.
So the answer is 57510.
7 0
3 years ago
Which experimental feature of the MALDI-MS technique allows the separation of ions formed after the adduction of tissue molecule
34kurt

Answer:

The experimental feature of the MALDI-MS technique which allows the separation of ions formed after the adduction of tissue molecules:

B) Velocity of ions depends on the ion mass-to-charge ratio.

Explanation:

  • The option a is not correct as distance traveled by ions doesn't depend upon the ion charge rather it depends upon time for which you leave the sample to run.
  • The  option b is correct as velocity of ions depends on the ion mass-to-charge ratio because separation is done due to mass to charge ratio feature.
  • The option c is incorrect as time of travel is not inversely proportional to the ion-to-mass ratio because the ion will move across the gel until you stop the electric field.
  • The option d is not correct as electric field between MALDI plate and MS analyzer is though uniform but this feature doesn't allow the separation of ions.

6 0
3 years ago
Which event is most likely an example of a chemical reaction
Inessa [10]

Explanation:

One example of a chemical reaction is the rusting of a steel garbage can. That rusting happens because the iron (Fe) in the metal combines with oxygen (O2) in the atmosphere. Chemical bonds are created and destroyed to finally make iron oxide (Fe2O3).

7 0
3 years ago
How many moles are in 4.233X 10^21
krek1111 [17]
0.00702906176 moles
hope this helps :)
6 0
2 years ago
Classify each of the following as abiotic or biotic.
mars1129 [50]

Answer:

<h3>D. </h3>

Explanation:

<h3>#I'm not sure</h3><h3>#happy learning</h3>
7 0
2 years ago
Read 2 more answers
Other questions:
  • Explain, in terms of atomic structure, why the radius of an Na atom is larger than the radius of an Na+ ion.
    6·1 answer
  • Chemical Formula for Coffee?
    11·1 answer
  • Consider the reactions C2H4(g) + 2O2(g) → 2CO(g) + 2H2O(g) ∆H = −758 kJ mol−1 2C(s) + 2H2(g) → C2H4(g) ∆H = +52 kJ mol−1 H2(g) +
    15·1 answer
  • Compare and contrast how are predation and parasitism similar how do they differ
    13·1 answer
  • What family is the mineral lead in?
    11·1 answer
  • What is the balanced ionic equation for the reaction HCHO2 (aq) + KOH (aq)
    14·1 answer
  • Choose the correct coefficients to balance the following equation: __Zn + __HCl Imported Asset __ZnCl2 + __H2.
    7·1 answer
  • Hydrogen sulfide and concentrated sulfuric acid react to form water and sulfur dioxide as shown in the following reaction:
    13·1 answer
  • Write Fe salts (divalent Fe)?​<br><br>Pleasee help.... I will mark the answer with brainlist.
    10·1 answer
  • PLEASE HELP!!!!!!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!