answer.
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
Vinil7 [7]
2 years ago
8

A piece of iron metal is heated to 155 degrees C and placed into a calorimeter that contains 50.0 mL of water at 18.7 degrees C.

The temperature of the water rises to 26.4 degrees C. How much heat was released by the iron?
A-1610 J
B-5520 J
C-385 J
D-2250 J
Chemistry
2 answers:
zysi [14]2 years ago
3 0
Jsjsjsdjdjkdskkeekdks prbably awnser a
Guest1 year ago
0 0

It’s A i just don’t know how. But it’s fs A.

You might be interested in
What is the fraction of the hydrogen atom's mass (11h) that is in the nucleus? the mass of proton is 1.007276 u, and the mass of
ololo11 [35]
Hello there!

To determine the fraction of the hydrogen atom's mass that is in the nucleus, we have to keep in mind that a Hydrogen atom has 1 proton and 1 electron. Protons are in the nucleus while electrons are in electron shells surrounding the nucleus. The mass of the nucleus will be equal to the mass of 1 proton and we can express the fraction as follows:

Mass Fraction= \frac{mass 1 Proton}{mass H atom} = \frac{1,007276 u}{1,007825}=0,9995

So, the fraction of the hydrogen atom's mass that is in the nucleus is 0,9995. That means that almost all the mass of this atom is at the nucleus.

Have a nice day!
3 0
2 years ago
You have 125 g of a certain seasoning and are told that it contains 62.0 g of salt. what is the percentage of salt by mass in th
r-ruslan [8.4K]
62.0g/125g= 0.496 x 100 = 49.6%
4 0
2 years ago
What do pH and conductivity have in common?
Anna71 [15]
PH and conductivity have no common rekationship
8 0
2 years ago
Read 2 more answers
Draw the best lewis structure for bro4- and determine the formal charge on bromine
Svetach [21]

Answer :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule. The electrons are represented by dot.

The given molecule is, perbromate ion.

Bromine has '7' valence electrons and oxygen has '6' valence electron.

Therefore, the total number of valence electrons in perbromate ion, BrO_4^- = 7 + 4(6) + 1 = 32

According to Lewis-dot structure, there are 14 number of bonding electrons and 18 number of non-bonding electrons.

Formula for formal charge :

\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}

\text{Formal charge on }Br=7-0-\frac{14}{2}=0

The Lewis-dot structure of perbromate ion is shown below.

7 0
2 years ago
Read 2 more answers
For a pure substance, the liquid and gaseous phases can only coexist for a single value of the pressure at a given temperature.
anastassius [24]

Answer:

No, it is not.

Explanation:

Most solutions do not behave ideally. Designating two volatile  substances as A and B, we can consider the following two cases:

Case 1: If the intermolecular forces between A and B molecules are weaker than  those between A molecules and between B molecules, then there is a greater tendency  for these molecules to leave the solution than in the case of an ideal solution. Consequently,  the vapor pressure of the solution is greater than the sum of the vapor  pressures as predicted by Raoult’s law for the same concentration. This behavior gives  rise to the positive deviation.

Case 2: If A molecules attract B molecules more strongly than they do their own  kind, the vapor pressure of the solution is less than the sum of the vapor pressures as  predicted by Raoult’s law. Here we have a negative deviation.

The benzene/toluene system is an exception, since that solution behaves ideally.

8 0
2 years ago
Other questions:
  • A compound whose water solution conducts electricity and turnsphenolphthalein pink is(1) HCl (3) NaOH(2) HC2H3O2 (4) CH3OH
    5·1 answer
  • Normal rain has a pH of about 5.5 whereas the most acidic rain measured in Los Angeles had a pH of 1.5. How much more concentrat
    11·2 answers
  • 1.What is the name of the compound CuCO3?. a. Copper (I) Carbonate. b. Copper (II) Carbonate. c. Copper Carbon Oxide . d. Copper
    9·2 answers
  • Before raw data can be used as scientific evidence, it must be analyzed and summarized. One way of summarizing data is to find t
    15·1 answer
  • Which of the following is a disadvantage of using hydropower? (2 points)
    13·2 answers
  • Phosphorous acid, h3po3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture. calculate the ph f
    15·1 answer
  • Radioactive plutonium−239 (t1/2 = 2.44 × 105 yr) is used in nuclear reactors and atomic bombs. If there are 6.40 × 102 g of the
    14·1 answer
  • An ion with 5 protons, 6 neutrons and a charge of 3+ has an atomic number of ____.
    11·2 answers
  • A plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal
    15·2 answers
  • A diamond can make permanent marks on glass. It can also cut glass. Most other materſals cannot do this.Which property of a diam
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!