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
Bingel [31]
3 years ago
14

1. A 10 g gold coin is heated from 25°C to 50°C (CAu is 0.13 J/g-°C). What is the H?

Chemistry
1 answer:
Oksanka [162]3 years ago
4 0
The correct answer is + 32.5 J because heat is absorbed here by copper not evolved also after calculation we will find the H value is positive, lets calculate it:
H = m C Δt where:
m = 10 g 
C = 0.13 J/g.°C
Δ t = final temperature - initial temperature = 50 - 25 = + 25 °C
so H = 10 x 0.13 x (+25) = + 32.5 J
 
You might be interested in
If a container contains 3.5 moles and has a volume of 1.5 L, then what volume is it when it contains 8 moles? *
Lilit [14]
Volume would be 3.4 L
8 0
3 years ago
The formula of water, H2O suggests which of the following?
o-na [289]

Answer: A. There are two hydrogen atoms and one oxygen atom per water molecule.

Explanation:

The chemical formular for water "H2O", means it contain 2 hydrogen atoms and one oxygen atom per molecule.

6 0
3 years ago
What is 10 times as many as 1 hundred is blank hundred or blank thousand ?
Rama09 [41]

10 times as many as 1 hundred is 10 hundred or 1 thousand.

This is the question of simple multiplications related to a place value system.

The given equation in unit form can be rewritten as:

10 × 1 × 100 = (X × 100) or (Y × 1000)

Arranging in two parts, we get,

10 × 1 × 100 = X × 100           ........(1)

10 × 1 × 100 = Y × 1000         ........(2)

Now, calculating the value of X and Y,

From equation (1), we get,

10 × 1 × 100 = X×100

or, 1000 = X × 100

or, X = 10

Hence, 10 times as many as 1 hundred is 10 hundred.

Similarly, from equation (2). we get,

10 × 1 × 100 = Y × 1000

or, 1000 = Y × 1000

or, Y = 1

Hence, 10 times as many as 1 hundred is 1 thousand.

Therefore, 10 times as many as 1 hundred is 10 hundred or 1 thousand.

To learn more about hundreds, thousands, and place values, visit: brainly.com/question/17785584

#SPJ9

8 0
1 year ago
Calculate the density of a 20.015 g object that occupies 5.44 cm3 .
Scilla [17]

Answer:

density =  \frac{mass}{volume}  \\  \\ density =  \frac{20.015}{5.44}  \\  \\ { \boxed{ \boxed{density = 3.679 \: g {cm}^{ - 3} }}}

5 0
2 years ago
Read 2 more answers
The electronegativity is 2.1 for h and 1.9 for pb. based on these electronegativities pbh4 would be expected to
Sedbober [7]
PbH4 will be formed as a result of a polar covalent bond between the H and the Pb.

Since H is more electronegative than the Pb, it is, thus, expected that the H would be able to pull the electron charge towards itself. This will result in the H being negative.

Based on this:
PbH4 would be expected to <span>have polar covalent bonds with a partial negative charges on the H atoms. </span>
8 0
3 years ago
Other questions:
  • Which of the following are building blocks of elements A. Atoms B. Protons C. Ions 2. Atoms are made up of A. Air,water,soil B.
    7·1 answer
  • What is the total mass of three gold bars that weigh 5543 mg, 23.45 mg, and 697.4 mg?
    6·1 answer
  • The half-life of phosphorus-32 is 14.26 days. calculate its decay constant. express the decay constant numerically in inverse da
    10·2 answers
  • Which choice is not an example of a molecule<br><br> Mn<br> O3<br> KOH<br> H2S
    10·2 answers
  • List three different forms of potential energy
    15·1 answer
  • In the winter , people often buy large bags of rock salt to sprinkle on their walkways . Why do people do this?
    13·1 answer
  • Dry ice (solid CO2) has occasionally been used as an "explosive" in mining. A hole is drilled, dry ice and a small amount of gun
    14·1 answer
  • What is electrons configuration for arsenic ?
    9·1 answer
  • If the mass of an object is 20 kg and the acceleration is 5m/s2 . What is the force?
    5·1 answer
  • As a student , what can you do to help in preventing pollution in your community ?​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!