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
harina [27]
3 years ago
13

A wooden block has a volume of 25.3 cm3. Its mass is 17.0g. What is the density of this block?

Chemistry
1 answer:
kolbaska11 [484]3 years ago
6 0
Density = (mass) / (volume)

Density = (17.0 g) / (25.3 cm³) = 0.672 gm per cm³. (rounded)
You might be interested in
HURRY PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!
aivan3 [116]

Answer:


When <em>a scientist on Earth drops a hammer and a feather at the same time an astronaut on the moon drops a hammer and a feather, the result</em>  expected is that <em>the hammer hits the ground before the feather on Earth, and the hammer and feather hit at the same time on the moon (option D).</em>


Explanation:


In the abscence of atmosphere (vacuum), the objects fall in free fall. This is, the only force acting on the objects is the gravitational pull, which is directed vertlcally downward.


Under such absecence of air, the equations that rules the motion are:


  • V = Vo + gt
  • d = Vo + gt² / 2
  • Vf² = Vo² + 2gd

As you see, all those equations are independent of the mass and shape of the object. This explains why <em>when an astronaut on the moon drops a hammer and a feather at the same time</em>, <em>the hammer and feather hit at the same time on the moon</em>, a space body where the gravitational attraction is so small (approximately 1/6 of the gravitational acceleration on Earth) that does not retain atmosphere.


On the other hand, the air (atmosphere) present in Earth  will exert a considerable drag force on the feather (given its shape and small mass), slowing it down, whereas, the effect of the air on the hammer is almost neglectable. In general and as an approximation, the motion of the heavy bodies that fall near the surface is ruled by the free fall equations shown above, so, <em>the result </em>that is<em> expected  when a scientist on Earth drops a hammer and a feather at the same time is that the hammer hits the ground before the feather</em>.

8 0
3 years ago
Read 2 more answers
Can anyone help with Standard Cell Potential?​
Shkiper50 [21]

Answer:

its A

Explanation:

7 0
3 years ago
pure potassium hydrogen phthalate is used for the standardization of the sodium hydroxide solution. suppose that the potassium h
12345 [234]

Answer:

the reported molar concentration of the sodium hydroxide solution will be too high.

Explanation:

The term "standardization" in science or in analytical Chemistry simply means the process involved in the determination of a standard or the concentration of a particular substance.

One of the advantages and the most important of the advantages of Standardization is that it Helps in making sure that we get a result with the least error.

So, let me explain the answer. The reported molar concentration of the sodium hydroxide solution will be TOO HIGH because the potassium hydrogen phthalate is NOT completely dry. The weight of the moisture will create an additional weight which will increase the weight of potassium hydrogen phthalate in the solution

4 0
3 years ago
What is the relationship between heat, temperature, thermal<br> energy within a system?
Romashka-Z-Leto [24]

Answer:

The thermal energy, orheat, of an object is obtained by adding up the kinetic energy of all the molecules within it.Temperature is the average kineticenergy of the molecules. 

6 0
2 years ago
Answers only please 100pts and brainliest. you will be reported for wrong answers.
Ierofanga [76]

Answer:

K= 25.16%

Mn= 34.59%

O= 40.25%

Explanation:

KMnO_4

Find the total mass of the compound. You can do this by multiplying by the molar mass.

K=40*1=40\\Mn=55*1=55\\O=16*4=64

add them:

40+55+64=159g

Now convert each element individually to grams using molar mass

1molK(\frac{40gK}{1molK} )=40gK

1molMn(\frac{55gMn}{1molMn} )=55gMn

4molO(\frac{16gO}{1molO})=64gO

Divide by the mass of the compound and multiply by 100

K=\frac{40g}{159g} *100=25.16

Mn=\frac{55g}{159g}*100=34.59

O=\frac{64g}{159g}*100=40.25

5 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose 1.65 moles of C₆H₆ react with excess oxygen to produce carbon dioxide and water.
    6·2 answers
  • A student wants to make 100 mL of 0.30 M HCl. How many milliliters of 6.0 M HCl is needed to make this solution
    7·1 answer
  • How can chemistry enhance our view of the world?
    5·1 answer
  • Where else can you observe colorful light emisiions? are these emission applications related?​
    14·1 answer
  • Can someone please help me?!??!
    10·1 answer
  • Calculate the molar mass of each of the following:
    12·1 answer
  • Point give away!!! 15 points not alot but ots ok ​
    14·2 answers
  • Why do electrons falling into different orbits give off characteristics wavelengths?​
    5·1 answer
  • Examining the equations or equilibrium constants related to a base, salt, or an acid is an indirect way to determine strength of
    5·1 answer
  • On which side of the table are metals and nonmetals located?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!