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
Mademuasel [1]
3 years ago
11

a quantity of ethanol is cooled from 47.9° C to 12.3°C and releases 3.12 KJ of heat. what is the mass of the ethanol sample?​

Mathematics
1 answer:
victus00 [196]3 years ago
8 0

Answer:

35.9 grams

Step-by-step explanation:

We use the formula:

q=m*C_p*\Delta T

Where

q is heat released

m is mass

C_p is the constant 2.44

ΔT is change in temperature

We put the info in the formula and solve for m (mass):

q=m*C_p*\Delta T\\-3.12 =  m*2.44(12.3-47.9)\\-3.12*10^3=m*(-86.864)\\m=35.9

The mass of ethanol is 35.9 grams

You might be interested in
Please help pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Wittaler [7]

Answer:

-4 5/12

Step-by-step explanation:

-23/3 + (-11/2) + 35/4

<em>Find a common denominator (12).</em>

-92/12 + (-66/12) + 105/12

<em>Reform the equation to have this as a single fraction.</em>

(-92 + (-66) + 105)/12

<em>Subtract 66 from -92 to get -158.</em>

(-158 + 105)/12

<em>Add 105 to -158 to get -53.</em>

-53/12

<em>Convert into a mixed number by dividing by 12.</em>

-4 5/12 (Choice A) is your answer.

6 0
3 years ago
99.7 of all newborn babies in the United States weigh between
Marina CMI [18]

Answer:

2000-5000 g

Step-by-step explanation:

Averagely, the weight of a new born baby is 7.5 lb, which is equal to 3.5 kg.

Converting this weight in kg to grams,

3.5 kg = 3.5 *1000 = 3500 g

From the answer choices, the value will range from 2000 g-5000 g

4 0
3 years ago
Read 2 more answers
How to solve this algebraically?
Keith_Richards [23]
Ok so x+4-1 makes x-1 so i belive the answer could be 1/5 
7 0
3 years ago
Read 2 more answers
Brian saved 30% of the money he earned.If brain earned $260,how much did he save?
mina [271]

30/100 = 0.30

0.30 * 260 = 78

He saved $78.

7 0
3 years ago
Read 2 more answers
Laura borrowed $1,990 at 5% for 2 years. what was the total interest?
Gnom [1K]

Answer:

$199

Step-by-step explanation:

I = Prt

I = (1990)(0.05)(2)

I = 199

7 0
3 years ago
Other questions:
  • How could the relationship of the data be classified?
    6·2 answers
  • Please 20 points ASAP
    14·2 answers
  • How do you find the area of a regular polygon
    6·1 answer
  • What is 9 times 9 could you answer this qustion
    9·2 answers
  • Tessa drew a scale drawing of the elementary school. She used the scale 1 centimeter : 7 meters. The school yard is 7 centimeter
    11·2 answers
  • A line passes through (-2, 7) and (3, 2).
    13·2 answers
  • A study conducted on 40,000 words in the English language found that about 6,670 words started with the letter T, which Is the m
    15·1 answer
  • 5/12,3/8,6,14in ascending or<br><br><br>der​
    15·1 answer
  • A credit card company charges a 3.5% transfer fee to transfer a balance to a new account. What would the transfer fee be for a b
    15·1 answer
  • Help pleasseeeeeeeee
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!