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
Mazyrski [523]
2 years ago
13

A beaker of water has a volume of 125mL and a density of 1.0g/mL. Calculate the mass of the water.​

Chemistry
1 answer:
Oksanka [162]2 years ago
4 0

Answer: 125 grams

Explanation:  (125mL)*(1.0g/mL) = 125g

You might be interested in
12. Draw an energy curve for a chemical reaction that begins at 30 kj and has an activation energy of
Rufina [12.5K]

Answer:

  • <em>Since the activation energy is 50kJ , we need to supply it  50kJ from 30kJ to make it 80kJ .</em>
  • Diagram attached in the file .

8 0
3 years ago
A catalyst is used to increase the reaction rate of a chemical reaction.
hichkok12 [17]
The answer would be C
3 0
3 years ago
Imprints of the shells of ocean clams are often found in the rocks of the Appalachian Mountains. What do these imprint fossils M
Anit [1.1K]
A. It is the most reasonable answer
7 0
2 years ago
You have 4 moles of a gas in a 50 L container held at 2 atm pressure. Currently the temperature is 27 ºC. R = 0.0821 L*atm/(mol*
Mariulka [41]
The formula used for determining gas pressure, volume and temperature interaction would be PV=nRT. 

<span>• What is the temperature in Kelvins?
</span>You already right at this part. Kelvin temperature formula from celsius should be:
K= C+273.15= 
<span>K= 27 +273.15 = 300.15 
It is important to remember that the formula in this question is using Kelvin unit at temperature, not Celcius or Fahrenheit.
</span>
<span>• Assuming that everything else remains constant, what will happen to the pressure if the temperature decreases to -15 ºC?
</span>In this case, the temperature is decreased from 27C into -15C and you asked the change in the pressure.
Using PV=nRT formula, you can derive that the temperature will be directly related to pressure. If the temperature decreased, the pressure will be decreased too. 

<span> If you increase the number of moles to 6 moles, increase temperature to 400K and reduce the volume to 25 L, what will the new pressure be?
</span>PV=nRT
P= nRT/V
P= 6 moles* <span>0.0821 L*atm/(mol*K) * 400K/25L= 7.8816 atm</span>
3 0
3 years ago
In the equilibrium constant expression for the reaction below what is the correct exponent for N2O4?
irga5000 [103]
As we have the balanced reaction equation is:

N2O4 (g) ↔ 2NO2(g)

from this balanced equation, we can get the equilibrium constant expression

KC = [NO2]^2[N2O4]^1

from this expression, we can see that [NO2 ] is with 2 exponent of  the stoichiometric and we can see that from the balanced equation as NO2
is 2NO2 in the balanced equation.

and [N2O4] is with 1 exponent of the stoichiometric and we can see that from the balanced equation as N2O4 is 1 N2O4 in the balanced equation. 

∴ the correct exponent for N2O4 in the equilibrium constant expression is 1 
7 0
3 years ago
Other questions:
  • Why does your reflection in a mirror look different from your reflection in wood
    8·1 answer
  • What is the main responsibility of scientists when enviermental laws are proposed?
    10·1 answer
  • Why is nature more influential than nurture?
    13·2 answers
  • Which is a defining trait of a mineral?
    9·1 answer
  • Why do some earthquakes cause more damage than others?
    9·2 answers
  • The complex ion Fe(CN)63- is paramagnetic with one unpaired electron. The complex ion Fe(SCN)63- has five unpaired electrons. Wh
    6·1 answer
  • An ionic compound has a solubility of 30 g per 100 mL of water at room temperature. A solution containing 70 g of the compound i
    13·1 answer
  • A chemist adds of a potassium permanganate solution to a reaction flask. Calculate the mass in grams of potassium permanganate t
    13·1 answer
  • Which is the largest number? O A. 2.2 x 108 O B. 2.9 O C. 2.5 x 10-5 D. 2.8 x 106​
    12·1 answer
  • How many unpaired electron are there is Co2+ ion
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!