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
s344n2d4d5 [400]
3 years ago
9

A metal block has a mass of 122 grams and measures 2cm x 2cm x 4cm. What is the density of the block?

Chemistry
1 answer:
SashulF [63]3 years ago
3 0

Answer:

7.625g/cm³

Explanation:

Density = mass/volume

Volume of the block=2cm×2cm×4cm=16cm³

Mass of the block=122g

Density=122/16

=7.625

Therefore, the density of the block is 7.625g/cm³

You might be interested in
What is the reaction rate at 1000 K K when the concentration of NO N O is increased to 0.12 M M , while the concentration of H2
marissa [1.9K]

Answer:

the reaction rate of 1,000 k is 17.28 m/s

Explanation:

The computation of the reaction rate in case when NO is increased to 0.12 M is shown below:

According to the question, data provided is as follows

NO = 0.12M

H_2 = 2.00\times 10^{-2} M

Based on the above information

Reaction rate is

= (6.0\times10^4)\times(0.12)^2\times(2\times10^{-2})

= 17.28 M/s

Hence, the reaction rate of 1,000 k is 17.28 m/s and the same is to be considered

4 0
4 years ago
................................................................
solniwko [45]

Answer:

..............,.,.,.,,..,,.,.,

7 0
3 years ago
Read 2 more answers
Find the atomicity of water.​
Flauer [41]
One molecule of water contains two atoms of hydrogen and one atom of oxygen, the atomicity of water is three.
4 0
3 years ago
I want to know which ones are molecular equation, complete ionic equation and net ionic equation
NNADVOKAT [17]

Answer:

The molecular equations are:

1. CuSO₄ (aq) + 2 KOH (aq) ----> Cu(OH)₂ (s) + K₂SO₄ (aq)

2. Ba(NO₃)₂ (aq) + K₂SO₄ (aq) + BaSO₄ (s) + 2 KNO₃ (aq)

The complete ionic equations are:

1. Ag + (aq) + NO₃- (aq) + I- (aq) + Na (aq) ---> AgI (s) + No₃- (aq) + Na+ (aq)

2. Cu²+ + SO₄²- (aq) + 2 K+ (aq) + 2 OH- (aq) ---> Cu(OH)₂ (s) + 2K+ (aq) + SO₄²- (aq)

The net ionic equations are:

1. Ca²+ (aq) + SO₄²- (aq) ---> CaSO₄ (s)

2. Ba²+ (aq) +SO₄²- (aq) ---> BaSO₄ (s)

Explanation:

A molecular equation is a balanced chemical equation which shows the reacting species as molecules rather than as componenet ions in their compounds with subscripts written beside the molecules to indicate the state in which they occur in the chemical reaction.

An ionic equation expresses the reacting species as components ions in a chemical reation. All the ions and molecules reacting are shown.

In a net ionic equation, the ions which remain in the ionic state also known as spectator ions are not written as part of the equation.

From the given attachment;

The molecular equations are:

1. CuSO₄ (aq) + 2 KOH (aq) ----> Cu(OH)₂ (s) + K₂SO₄ (aq)

2. Ba(NO₃)₂ (aq) + K₂SO₄ (aq) + BaSO₄ (s) + 2 KNO₃ (aq)

The complete ionic equations are:

1. Ag + (aq) + NO₃- (aq) + I- (aq) + Na (aq) ---> AgI (s) + No₃- (aq) + Na+ (aq)

2. Cu²+ + SO₄²- (aq) + 2 K+ (aq) + 2 OH- (aq) ---> Cu(OH)₂ (s) + 2K+ (aq) + SO₄²- (aq)

The net ionic equations are:

1. Ca²+ (aq) + SO₄²- (aq) ---> CaSO₄ (s)

2. Ba²+ (aq) +SO₄²- (aq) ---> BaSO₄ (s)

8 0
3 years ago
1.Explain why the reactivity of group 7 decreases as you move down the group. Try to use the sentence starters here: When group
blsea [12.9K]

Answer:

Explanation:

When group 7 elements react , their atoms  gains  one  electron into their highest occupied  energy level ( outer shell) to form single negative - charged ion .

As you move down the group , the outer shells get increased  i.e an additional electron shell is added  thereby increasing the atomic radius  of the atom.  The electrons in the outer shell move further away from the nucleus as we go down the group .

Therefore the force of  attraction  between the shells and nucleus is decreased .

This makes attracting an extra electron difficult  . And so ability of the atom to attract electron to fill the outermost shell reduces which means the   reactiveness of the atom reduces.

6 0
3 years ago
Other questions:
  • Describe the differences between long-term and short-term environmental changes in 2-3 sentences
    14·1 answer
  • Thsisjsnnejsjwkwnwnw don’t answer this
    11·2 answers
  • Neon effuses 1.26 times as fast an an unknown gas at a particular temperature. What is the molar mass of the unknown gas
    11·1 answer
  • What is the Mass if the Density = 7g/mL Volume = 10mL?
    12·1 answer
  • Which generally occurs as temperature increases?
    14·1 answer
  • An unknown element, X, is a nonmetal that contains seven valence electrons. Element X most likely forms ___________ covalent bon
    12·1 answer
  • Please this is important
    5·1 answer
  • A 20.0 L container at 303 K holds a mixture of two gases with a total pressure of 5.00 atm. If there are 2.00 mol of Gas A in th
    13·1 answer
  • An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level
    5·1 answer
  • Which of the following statements is correct?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!