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
Brrunno [24]
3 years ago
11

What is the mass of a sample of iron if that sample lost 2300J of heat energy when it cooled from 80 oC to 30°C? The specific he

at of iron is 0.449 J /g °C.
Chemistry
1 answer:
irakobra [83]3 years ago
7 0
102 grams.
Equation:
Quantify of heat = mass x specific heat x difference in temperature
We have: quantity of heat : 2300J
specific heat: .449 J/g
difference in t: 80 - 30 = 50
Solve for mass: 2300 = mass x 0.449 x 50
mass = 102.449
2 sig-figs --> 102 grams
You might be interested in
What do two or more atoms form when they share electrons in a chemical bond
dlinn [17]
A covalent bond is your answer
6 0
3 years ago
Read 2 more answers
What is a good indicator for titrating potassium hydroxide with hydrobromic acid?
Cerrena [4.2K]
Potassium hydroxide is a strong base and hydrobromic acid is a strong acid. This implies that the pH of the end-point [neutralization] of their titration will be around pH 7. A good indicator for this kind of pH is bromthymol blue. This is because this indicator changes its colour at pH 7.
4 0
3 years ago
6. List two (2) ethical issues that the healthcare provider has a public duty to report.
Gennadij [26K]

Answer: Communicable diseases, abuse gunshot wounds and forensic medicine

Explanation:

3 0
2 years ago
What is the mass in grams of 3.05x10^25 gold atoms
Snezhnost [94]
9.96*10⁻²² is the answer, First you find the molar mass of gold, then you turn atoms to moles then moles to grams. There you go you're done!<span />
4 0
3 years ago
An unknown compound in the lab is either LiOH, CaF2, or LiF. If the sample has a mass of 260 grams and contains 3.33 moles, what
sergij07 [2.7K]

Answer:

CaF2

Explanation:

1 mole of CaF2 = 78.0748064 grams

78 times 3.33= 259.74

the others multiplied were nowhere near 260 grams either

3 0
2 years ago
Other questions:
  • 1) Calculate the molar mass of Tryptophan.
    10·1 answer
  • 2) Which one<br>more active in between<br>Li and Na and why ?<br>IS​
    11·2 answers
  • Differences between iron and steel
    12·1 answer
  • Give the ion symbol for the the ion that has 15 protons and 18 electrons
    5·2 answers
  • Give the empirical formula for C↓8H↓8
    8·1 answer
  • What mass of propane is necessary to react with the amount of oxygen in the chemical formula C3H8 + 5O2 → 3CO2 + 4H2O
    5·1 answer
  • an object is moving to the right at a constant veloxity. what will happen if a force of 20 N starts acting on it in the opposite
    11·1 answer
  • How many elements and atoms are in chalk
    6·1 answer
  • Help please ! ASAP neeeeeed and answerrrrrr
    10·2 answers
  • . a large piece of jewelry has a mass of 132.6 g. a graduated cylinder initially contains 48.6 ml water. when the jewelry is sub
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!