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
Lemur [1.5K]
3 years ago
11

Study the graphs

Chemistry
1 answer:
oee [108]3 years ago
4 0

Answer:

Graph A

Explanation:

You might be interested in
Colors of light with shorter wavelengths - A: have less energy than colors with longer wavelengths Strike Reset B: have more ene
dezoksy [38]

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

tinyurl.com/wpazsebu

6 0
3 years ago
Which of these is a chemical property of a substance?
valentinak56 [21]
Color, the other answers arent changing the substance into something different
3 0
3 years ago
How many kilojoules of energy would be required to heat a 225g block of aluminum from 23.0 C to 73.5 C?
gulaghasi [49]

Answer:

\boxed {\boxed {\sf 10.2 \ kJ}}

Explanation:

We are asked to find how many kilojoules of energy would be required to heat a block of aluminum.

We will use the following formula to calculate heat energy.

q=mc \Delta T

The mass (m) of the aluminum block is 225 grams and the specific heat (c) is 0.897 Joules per gram degree Celsius. The change in temperature (ΔT) is the difference between the final temperature and the initial temperature.

  • ΔT = final temperature - inital temperature

The aluminum block was heated from 23.0 °C to 73.5 °C.

  • ΔT= 73.5 °C - 23.0 °C = 50.5 °C

Now we know all three variables and can substitute them into the formula.

  • m= 225 g
  • c= 0.897 J/g° C
  • ΔT= 50.5 °C

q= (225 \ g )(0.897 \ J/g \textdegree C)(50.5 \textdegree C)

Multiply the first two numbers. The units of grams cancel.

q= (225 \ g  * 0.897 \ J/g \textdegree C)(50.5 \textdegree C)

q= (225   * 0.897 \ J / \textdegree C)(50.5 \textdegree C)

q= (201.825\ J / \textdegree C)(50.5 \textdegree C)

Multiply again. This time, the units of degrees Celsius cancel.

q= 201.825 \ J * 50.5

q= 10192.1625 \ J

The answer asks for the energy in kilojoules, so we must convert our answer. Remember that 1 kilojoule contains 1000 joules.

\frac { 1  \ kJ}{ 1000 \ J}

Multiply by the answer we found in Joules.

10192.1625 \ J * \frac{ 1 \ kJ}{ 1000 \ J}

10192.1625  * \frac{ 1 \ kJ}{ 1000 }

\frac {10192. 1625}{1000} \ kJ

10.1921625 \ kJ

The original values of mass, temperature, and specific heat all have 3 significant figures, so our answer must have the same. For the number we found, that is the tneths place. The 9 in the hundredth place tells us to round the 1 up to a 2.

10.2 \ kJ

Approximately <u>10.2 kilojoules</u> of energy would be required.

3 0
3 years ago
A hypothetical main group element E reacts with chlorine to form an ionic compound with the formula ECl. The element is a member
Ronch [10]
It would be 1A bc then the +1 charge will cancel out chlorine’s -1 charge
7 0
3 years ago
Which is the best explanation of why heat is released when
vazorg [7]
The answers is A. Reales energy stored in chemical bonds
6 0
3 years ago
Other questions:
  • H​2 ​​ and O2 ​​ react to produce H​2O. What is the mass of H2​​O produced when 0.73 g of H​2 ​​ completely reacts with 3.28 g o
    8·1 answer
  • Which choice best names the type or types of rock that can become metamorphic rock?
    12·2 answers
  • Digoxin injection is supplied in ampules of 500 mcg per 2 mL. How many milliliters must a nurse administer to provide a dose of
    9·1 answer
  • the frog population in the Amazon basin varied. every 500 years there was a mutational change leading to speciation. in between
    10·1 answer
  • You record a %T of 85 from a Spec 20.<br><br> This is equivalent to what absorbable level?
    15·1 answer
  • In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. how many
    8·2 answers
  • Discuss whether two products are required for a chemical reaction. (NEED HELP ASAP)
    11·1 answer
  • The vapor pressure of a system at equilibrium
    10·1 answer
  • Anne completely fills the fuel tank of her car with a mixture of gasoline and ethanol, C2H5OH. When filled, the fuel tank contai
    8·1 answer
  • water dissolves salts because it: select one: a. is hydrophobic, and salts are also hydrophobic. b. forms covalent bonds with th
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!