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
Xelga [282]
3 years ago
10

Which one On my test

Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
5 0

Answer:

20 Hz

Explanation:

You might be interested in
2. After quenching your solution with ice, the resulting aqueous layer became acidic. Use a chemical equation to explain how the
alexandr402 [8]

Answer:

C2H5Cl + H20 ⇆ C2OOH4

Explanation:

The left over acetyl chloride which reacted with water to produce acetic acid

3 0
3 years ago
How many resonance structures are there for [S2CO]2- ?
Irina-Kira [14]

Answer:

Three

Explanation:

1. Draw a Lewis structure

  • Put the least electronegative atom (C) in the centre
  • Attach the O and two S atoms to the C.
  • Add enough electrons to give each atom an octet.

2. Draw the resonance structures

You should get one of the structures below.

It has a double bond and two single bonds.

The resonance structures will have the double bond in each of the other two positions.

5 0
3 years ago
The formula of a compound indicates of all of the following except
Mazyrski [523]
How elements are joined in the compound or the way the atoms are arranged (the structure) in a compound
7 0
3 years ago
a 20.4 g aluminum sphere and a 49.4 g iron sphere are both added to 75.2 mL of water contained in a graduated cylinder. what is
alexandr1967 [171]
The level in the beaker will increase because the volumes of the spheres will also be added to the volume of the water. First, we must determine the volume of each sphere. For this, we will use:

density = mass / volume
We can check the density of both aluminum and iron in literature, and given the mass, we may obtain the volume. 

Aluminum:
Density = 2.70 g/ml
Mass = 20.4 g
Volume = 20.4 / 2.7 = 7.56 ml


Iron:
Density = 7.87 g/ml
Mass = 49.4 g
Volume = 49.4 / 7.87 = 6.28 ml

Now, we add these volumes to the volume of water present:
75.2 + 6.28 + 7.56 = 89.04

The new level will be 89.0 ml
3 0
3 years ago
Read 2 more answers
Can someone help me by giving me the formula of determining the amount of energy used in a reaction?
Vlada [557]
Q=mc(deltaT)
Q is the amount of energy which you are looking for
M is the mass which you can find
C is the specific heat of water which is 4.18 J/gC
DeltaT is the change in temperature which you can find.

To find the mass, first you must know that the density of water is 1g/mL, meaning that 200 mL has a mass of 200 g. This means that to find the total mass (m in the equation) all you need to do is add the mass of water and NaOH.

200 g + 2.535 g=202.535 g.

To find deltaT you would need to take the final temperature minus the initial temperature.

27.8C-24.2C=3.6C

Then these values can be substituted into the equation:

q=(202.635g)(4.18J/gC)(3.6C)
Q=3049.25 J

Technically this should be rounded off to 1 significant figure (200 mL only had 1), but ignoring signficiant figure rules this should be correct. Also, sometimes other units like calories or kJ may be asked for, meaning that a conversion or alternate c value would be used.
5 0
3 years ago
Other questions:
  • What about matter can change and what does not change according to the law of conservation?
    14·1 answer
  • What is the molar mass of magnesium chloride, MgCl2?
    9·1 answer
  • Calculate the molecular (formula) mass of each compound: (a) dinitrogen pentaoxide; (b) lead(ll) nitrate; (c) calcium peroxide.
    10·1 answer
  • The shape of a planet's orbit is influenced by gravity.<br> O True<br> O False
    6·2 answers
  • FeCl3 + NaOH → Fe(OH)3 + NaCl​
    6·1 answer
  • Which BEST explains why the ice cube sank in the liquid?
    11·2 answers
  • What is the movement of air parallel to Earth's surface called?
    9·1 answer
  • Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess Group of ans
    7·1 answer
  • A 25.00-mL sample of 6.00 M HCl solution is diluted to a new volume of 85.00 mL. What is the concentration of the dilute solutio
    12·1 answer
  • Considering the combustion reaction of propane again, what mass of propane (C3Hg) is necessary to react with 4.53 g of oxygen? C
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!