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
iren2701 [21]
3 years ago
9

A class-d fire extinguisher can be used to treat fires involving _____ as fuel sources.

Chemistry
1 answer:
Agata [3.3K]3 years ago
6 0
Metals that burn easily on contact with air, such as magnesium or lithium
You might be interested in
Can somebody please match the numbers?
valina [46]

Answer:

1. volcano

4. glaciers

Explanation:

this isnt really helpful but there is 2 sorryy

5 0
3 years ago
Read 2 more answers
If the volume of oxygen gas is 259 cm3 at 112 kPa, what would the volume be at 101.3 kPa?
NARA [144]

Answer:

<h3>The answer is 286.36 cm³</h3>

Explanation:

In order to find the volume be at 101.3 kPa we use Boyle's law which is

P_1V_1 = P_2V_2

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the final volume

V_2 =  \frac{P_1V_1}{P_2}  \\

From the question

P1 = 112 kPa = 112000 Pa

V1 = 259 cm³

P2 = 101.3 kPa = 101300 Pa

We have

V_2 =  \frac{112000 \times 259}{101300}  =  \frac{29008000}{101300}  \\  = 286.3573543...

We have the final answer as

<h3>286.36 cm³</h3>

Hope this helps you

6 0
3 years ago
Which example shows electrical energy being transformed into heat energy?
alekssr [168]

Answer:

B

Explanation:

first we apply electricity and by the help of circuits it will get toasted which means it will get heated so the answer is B

4 0
3 years ago
Read 2 more answers
A tank of water was contaminated with a colored dye (D). To determine the concentration of D, an analyst took 5.0-mL solution fr
alekssr [168]

Answer:

0.005 M

Explanation:

Given data:

volume of sample solution ( volume of D ) = 5.0 mL

volume of added stock solution ( V1 ) = 5.0 mL

concentration of added stock solution ( N1 )  = 0.02 M

Total volume of concentration  ( V2 )= 10 mL = ( 5.0 mL + 5.0mL)

concentration of Total volume of sample ( C2 ) = 0.01

N2 = ( N1V1 ) / V2

     = ( 0.02 * 5 ) / 10 = 0.01 m

absorbance of sample solution ( A1 ) = 0.10

absorbance of additional sample solution ( A2 ) = 0.20

attached below is the remaining part of the detailed solution

3 0
3 years ago
Barium chloride emits a green color when flame tested. What can be said about the wavelength of light it emits?
spin [16.1K]

The complete question is as follows: Barium chloride (BaCl2) emits a green color when flame tested. What can be said about the wavelength of light it emits? Select all that apply.

A) The thermal energy is transferred to the outer electrons of the barium ions.

B) The electrons gain enough energy to excite them to a higher energy level.

C) The electrons drop back down to their ground state, gaining energy.

D) The electrons release energy emitting a wavelength of 500-560 nm, corresponding to a green light, when going back to their ground state.

Answer: The following can be said about the wavelength of light that Barium chloride emits:

  • The thermal energy is transferred to the outer electrons of the barium ions.
  • The electrons gain enough energy to excite them to a higher energy level.
  • The electrons release energy emitting a wavelength of 500-560 nm, corresponding to a green light, when going back to their ground state.

Explanation:

As barium chloride is emitting green color when flame tested. This means that thermal energy is being transferred to the outer electrons of barium ions.

A visible light is emitted by a substance when its electrons move from a region of higher energy level to lower energy level. This is because energy is given off by the electrons when they move in a lower region.

This is only possible when the electrons gain enough energy to excite them to a higher energy level.

Also, the electrons release energy emitting a wavelength of 500-560 nm, corresponding to a green light, when going back to their ground state.

Thus, we can conclude that following can be said about the wavelength of light that Barium chloride emits:

  • The thermal energy is transferred to the outer electrons of the barium ions.
  • The electrons gain enough energy to excite them to a higher energy level.
  • The electrons release energy emitting a wavelength of 500-560 nm, corresponding to a green light, when going back to their ground state.
5 0
3 years ago
Other questions:
  • Benzene reacts with Cl2 by _____.<br> -substitution<br> -addition<br> -displacement<br> -redox
    15·2 answers
  • Question: A boy swimming in a lake smacks the surface of the water with his hand, creating sound waves that travel through the w
    15·1 answer
  • What interactions are responsible for maintaining quaternary protein structure? Select all that apply.
    10·1 answer
  • a container holds four times as many moles of CO2 as O2. if the total pressure in the container is 20. atm, what is the pressure
    9·1 answer
  • How do you find the mass of an element or compound?
    8·2 answers
  • The rate of chemical reactions generally ____ as temperature is raised
    8·2 answers
  • The following balanced equation shows the formation of water.
    14·2 answers
  • A piece of unknown metal with mass 68.6 g is heated to an initial temperature of 100 °C and dropped into 8.4 g of water (with an
    10·1 answer
  • When the concentration of SO2(g) is increased to 1.48 M, the ratio of products to reactants is 1.4. The equilibrium constant for
    8·1 answer
  • Q4. When 20 g of salt is added to a beaker containing 100 g of water, the salt dissolves and seems to disappear as a solution is
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!