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
Anna71 [15]
3 years ago
11

What is the initial temperature of 50g of water that was raised to 50*C by the addition of 4.18kJ of heat energy? (2 sig fig)

Chemistry
1 answer:
Alekssandra [29.7K]3 years ago
7 0

Answer:

50

Explanation:

You might be interested in
Explain how particles move before during and after melting
Aleksandr-060686 [28]

Answer:

Particles would move more freely, while still staying close together depending on the shape of the liquid

Explanation:

Melting is the process of going from a solid to a liquid due to the increase in heat/energy. This increase in heat/energy increases the speed at which the atoms within the object moves. Lets say we had an ice cube. While it is a cube, the particles inside the cube are slow and compact, staying close together.

When enough energy is gained, this makes the particles begin to move faster, gaining heat and energy which results in the ice cube melting and moving more freely than normal.

3 0
2 years ago
Read 2 more answers
Whenever energy is ______ from one form to another, some of that energy is lost by being changed into heat.
schepotkina [342]
Whenever energy is converted from one form to another, some of that energy is lost by being changed into heat.
5 0
3 years ago
Enter your answer in the provided box. Calculate the number of moles of CrCl, that could be produced from 49.4 g Cr202 according
Mrrafil [7]

Answer:

0.4694 moles of CrCl₃

Explanation:

The balanced equation is:

Cr₂O₃(s) + 3CCl₄(l) → 2CrCl₃(s) + 3COCl₂(aq)

The stoichiometry of the equation is how much moles of the substances must react to form the products, and it's represented by the coefficients of the balanced equation. So, 1 mol of Cr₂O₃ must react with 3 moles of CCl₄ to form 2 moles of CrCl₃ and 3 moles of COCl₂.

The stoichiometry calculus must be on a moles basis. The compounds of interest are Cr₂O₃ and CrCl₃. The molar masses of the elements are:

MCr = 52 g/mol

MCl = 35.5 g/mol

MO = 16 g/mol

So, the molar mass of the Cr₂O₃ is = 2x52 + 3x35.5 = 210.5 g/mol.

The number of moles is the mass divided by the molar mass, so:

n = 49.4/210.5 = 0.2347 mol of Cr₂O₃.

For the stoichiometry:

1 mol of Cr₂O₃ ------------------- 2 moles of CrCl₃

0.2347 mol of Cr₂O₃----------- x

By a simple direct three rule:

x = 0.4694 moles of CrCl₃

6 0
3 years ago
Explain what environmental bias means. What are the categories that
rewona [7]

Answer: Environmental bias can be defined as the idea that suggests a group of people being living in the environment which is harmful for them.

Explanation:

There are three categories that make up the environmental bias there are socio-cultural choice, occupational choice, and personal choice.

The environmental bias can be related to chemistry as chemical lab is an area prone to chemical (acid, alkali) and fire so produced in reactions thus prone to accidental hazards not safe for working of people. But people like to work in chemical lab due to their personal and occupational choice.

5 0
3 years ago
The nucleus of an atom ok K-42 contains
horsena [70]
Number of proton K=19

so, 42 - 19 =23

then the answer in 19 protons and 23 neutrons
3 0
3 years ago
Other questions:
  • Electrons in an excited state are more likely to enter into chemical reactions.
    5·1 answer
  • What Is the name of the force that holds together the sub Tomic particles of the nuclear?
    10·1 answer
  • Why is aluminum a substance
    11·2 answers
  • If an atom loses a proton, what happens?
    6·2 answers
  • When two amino acid monomers are positioned so that the carboxyl group of one is adjacent to the amino group of the other, they
    12·1 answer
  • How do you do number 2 becUse i honestly don't get it
    12·1 answer
  • Calculate the percent dissociation of crotonic acid (C,H,CO,H) in a 0.63 mM aqueous solution of the stuff.
    5·1 answer
  • Its is the change in energyof a neutral atom when an electron to the atom to form negativeion, thus neutral atom gain electon.Wh
    5·1 answer
  • Giving Brainliest if u help me with this
    12·2 answers
  • What is the reduction half-reaction for 2Mg + O2 → 2Mgo?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!