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
NISA [10]
4 years ago
8

A sample of tin (Cp = 0.227 J/g•°C) is placed in a freezer. Its temperature decreases from 15.0°C to −10.0°C as it releases 543

J of energy. What is the mass of the sample? Round your answer to three significant figures.

Chemistry
2 answers:
Andreas93 [3]4 years ago
8 0
We know, Q = m.c.Δt
m = Q / c.Δt

Here, Q = 543 J
c = 0.227 J/g C
Δt = 15-(-10) = 25 C

Substitute their values,
m = 543 / 0.227 * 25
m = 543 / 5.675
m = 95.68 g

In short, Your Answer would be 95.68 gram

Hope this helps!
pshichka [43]4 years ago
8 0

Answer:

see attached picture

Explanation:

You might be interested in
Which glassware would be used to make a 1.0 m kcl solution?
labwork [276]
Molarity of solution is expressed as,
Molarity = \frac{\text{weight of solute(g)}}{\text{Molecular Weight X Vol. of solution (l)}}

Molecular weight of KCl = 74.55 g/mol

For preparing 1 mol of KCl solution (1 liter), 74.44 g KCl must be dissolved in 1 liter of water.

Following glasswares are required for preparing the solution.
1) Watch Glass (for weight the KCl)
2) Beaker (for preparing the solution)
3) Stirrer (For dissolving KCl in water)
4) Standard measuring flask (To ensure final volume of solution is 1 liter)
6 0
3 years ago
What is the electron confiquation for <br> for the element Re
zvonat [6]

Answer:

Xe 4f14 5d5 6s2

Explanation:

4 0
3 years ago
The ester below can be separated into phenol and an acetate salt, via saponification: heating the ester with a strong base, such
erastovalidia [21]
I found a similar question online which will help me answer your incomplete question. To make it easier, show all the elements of the compound given. It is shown in the second picture attached.

a.) The formula for unsaturation number is shown in the 3rd picture attached. Following this, 
n = 8
m = 2(8) + 2 + 0 + 0 - 0 = 18
Thus,
x = Unsaturation number = (18 - 8)/2 = 5
<em>The unsaturation number is 5.</em>

b.) The molar mass of C is 12.01 g/mol; H is 1 g/mol; O is 16 g/mol. So, the molecular weight is:
Molecular weight = 12.01(8) + 8(1) + 2(16) = 136.08 g/mol
<em>The molecular weight of the ester is 136.08 g/mol.</em>

4 0
3 years ago
A 75.0 mL sample of sulfuric acid (H2SO4) is neutralized by 25.0 mL of 0.150 M NaOH. Calculate the molarity of the sulfuric acid
Juli2301 [7.4K]

Answer:

THE MOLARITY OF SULFURIC ACID SOLUTION IS 0.05 L

Explanation:

Ca Va = Cb Vb

Ca = ?

Va = 75.0mL = 0.075 L

Cb = 0.150 M

Vb = 25.0 mL = 0.025 L

Ca = CbVb/ Va

Ca = 0.150 * 0.025 / 0.075

Ca = 0.00375 / 0.075

Ca = 0.05 M

The molarity is 0.05 L

6 0
3 years ago
Phases of matter <br> Soild<br> *<br> *<br> *<br> Liquid<br> *<br> *<br> *<br> Gas <br> * <br> *
Annette [7]
Strawberry, bread, bananas/ lemonade, milk, water/ nitrogen, oxygen, carbon dioxide
3 0
3 years ago
Other questions:
  • Consider the reaction between HCl and O2: 4HCl grams + O2 - 2 H2O liquid + 2 Cl2 grams When 63.1 grams of HCl react with 17.2 g
    15·1 answer
  • A piece of black onyx was cut into a rectangular solid measuring 5.10 cm by 5.10 cm by 2.50 mm . What is the volume in cubic cen
    11·1 answer
  • Really need HElp with my chemistry question
    15·1 answer
  • Lol i decided to make a science question for u guys to see if your good st science so here it is...:What is a decomposer,a produ
    6·2 answers
  • Physical chemistry is picotechnology?
    10·1 answer
  • Research to find out 5 uses of magnets in our daily life in medical contexts, route finding, security, sorting steel from other
    8·1 answer
  • What are three common types of radioactivity given off by unstable atoms? How are they
    5·1 answer
  • The energy released in cellular respiration was originally present in ____________
    5·1 answer
  • Please help! Due today!
    9·1 answer
  • Which of these would NOT be considered “maintaining homeostasis”?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!