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
Ira Lisetskai [31]
3 years ago
13

Please help me it’s due today

Chemistry
1 answer:
il63 [147K]3 years ago
6 0

Answer:

I think it is A. the two forces are equal, or balanced, neither the table nor the book moves up or down.

Explanation:

Tome, the other options don’t make no sense

You might be interested in
a sample of ammonia liberates 5.66 kj of heat as it solidifies at its melting point . what is the mass of the sample?
Reil [10]
The correct answer for the question that is being presented above is this one: "<span>16.728 g."</span>

Given that 
ΔHsolid = -5.66 kJ/mol.
This means that 5.66 kJ of heat is released when 1 mole of NH3 solidifies 

When 5.57 kJ of heat is released
amount of NH3 solidifies = 5.57/5.66 = 0.984 moles 

<span>molar mass of NH3 = 17 g/mole </span>
<span>1 mole of NH3 = 17 g </span>
So, 0.984 moles of NH3 = 17 X 0.984 = 16.728 g
7 0
3 years ago
Iron and sulfur react to yield iron sulfide. Balance this reaction.
mariarad [96]

Answer:

8Fe + S8 -> 8FeS

Explanation:

7 0
4 years ago
Read 2 more answers
I don’t understand the equations
inna [77]
So the equation is balanced, meaning they have the smallest amounts of each element in the reactants to create the products.

So, 2 moles of H2S (the coefficient) contributes to 2 moles Ag2S, which is why the ratio is 2:2.

I hope that made sense.
6 0
3 years ago
Identify the following salts as neutral, acidic, or basic.
allochka39001 [22]

Answer:

1)NH4ClO4: acidic

2)NH4CN: basic

3)LiF: basic

4)KCN: basic

5)LiNO3: neutral

6)NH4Br: acidic

7)SrBr2: neutral

Explanation:

Salt is an ionic compound formed by the neutralization reaction between an acid and a base.The cation of base and anion from an acid combines to form a salt while H+ from acid and OH- from base forms water.

1)NH4Cl4: is an acidic salt formed from neutralization reaction between strong acid and a weak base.

2)NH4CN: is a basic salt formed from neutralization reaction between weak acid and weak base.

3)LiF: basic salt formed from neutralization reaction between strong acid and strong base.

4)KCN: basic salt formed from neutralization reaction between weak acid and strong base.

5)LiNO3: neutral salt formed from neutralization reaction between strong acid and strong base.

6)NH4Br: acidic salt formed from neutralization reaction between strong acid and weak base.

7)SrBr2: neutral acid formed from neutralization reaction between

strong acid and strong base.

4 0
4 years ago
How many electrons are present in an uncharged atom with its 1s, 2s, 2p, 3s, 3p and 4s subshells filled and with five electrons
marshall27 [118]

25

Explanation

The orbital quantum number of an atomic subshell determines the maximum number of electrons it can contain. For example:

  • Each s orbital (l = 0) holds up to 4 \; l + 2 = 2 electrons
  • Each p orbital (l = 1) holds up to 4 \; l + 2 = 6 electrons
  • Each d orbital (l = 2) holds up to 4 \; l + 2 = 10 electrons

The atom in question here contains four fully-occupied s orbitals, two fully-occupied p orbitals along with 5 electrons in a partially-occupied d orbital. It thus contains

4 \times 2 + 2 \times 6 + 5 = 25 \; \text{electrons}


5 0
3 years ago
Other questions:
  • A student wants to reclaim the iron from an 18.0-gram sample of iron(III) oxide, which
    10·2 answers
  • Is anyone good with science?
    5·1 answer
  • What is produced when chlorine is mixed with ethane?
    12·1 answer
  • Balance <br><br> _Mg + _HCL = _MgCl2 + H2
    15·2 answers
  • How are volcanoes formed? *
    13·1 answer
  • Classify CH3CH2NHCH3 as a strong base or a weak base
    11·2 answers
  • Can liquid CO2 exist on Earth? Why or Why not ?
    8·1 answer
  • What will be the equilibrium temperature when a 245 g block of lead at 300oC is placed in 150-g aluminum container containing 82
    15·1 answer
  • Calculate Kb for a 0.1 M solution of cyanide ion, given that Ka for hydrocyanic acid is 6.2 x 10â10.a) 8.4 x 10â9b) 7.87 x 10â3c
    5·1 answer
  • A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next fe
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!