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
anastassius [24]
3 years ago
7

A piece of metal ore has a density of 1.72 g/mL. When a student places it into a graduated cylinder containing water, the liquid

level rises from 21.25 mL to 26.47 mL. Calculate the mass of the metal ore in grams and round the final answer. _______ g
Chemistry
1 answer:
Hunter-Best [27]3 years ago
5 0

Answer:

9g

Explanation:

Since..., Density = mass/volume

;Firstly calculate the volume change of the water when the metal is placed in,

;Volume = 26.47 - 21.25

;Volume = 5.22 mL

Hence the mass of the ore;

; Making mass the subject of formula in the above equation,

Mass = Density × Volume

; Mass = 1.72 × 5.22

; Hence the mass = 8.9784

= 9g

You might be interested in
a compound has a molar mass of 129 g/mol if its empirical formula is C2H5N then what is the molecular formula
Elena-2011 [213]

Given :

A compound has a molar mass of 129 g/mol .

Empirical formula of compound is C₂H₅N .

To Find :

The molecular formula of the compound.

Solution :

Empirical mass of compound :

M_e = ( 2 \times 12 ) + ( 5 \times 1 ) + (  1  \times 14 )\\\\M_e = 43\ gram/mol

Now, n-factor is :

n = \dfrac{M}{M_e}\\\\n = \dfrac{129}{43}\\\\n = 3

Multiplying each atom in the formula by 3 , we get :

Molecular Formula, C₆H₁₅N₃

3 0
2 years ago
The reaction in Fe + O2→Fe2O3 is an example of a(n): A. combination reaction. B. decomposition reaction. C. aqueous reaction. D.
motikmotik
This is a combination reaction because two molecules becomes one

A + B ---> AB
8 0
3 years ago
The equation X + Y yields 
masha68 [24]
Most likely the equation yields a new compound XY. This is a synthesis reaction. <span>Synthesis reaction is a reaction where two or more substances combine to form a new compound. It is a reaction which releases energy in the form of heat and light. Therefore, it is an exothermic reaction.</span>
6 0
3 years ago
Help me with 23 fast
alina1380 [7]

Answer:

a salt

Explanation:

compounds are made of molecules but we need to mention the type of compound formed.

5 0
3 years ago
Read 2 more answers
Which diagram illustrates that matter is always conserved during a chemical reaction?
Alika [10]

Answer:

c

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the mass of 1 centimeter cubes of gold
    6·1 answer
  • What do Lewis structures show?
    12·2 answers
  • What is the value for ΔS°reaction for the following reaction, given the standard entropy values
    11·2 answers
  • When a substance goes from a gas to a liquid, it goes through a ________ change.
    12·1 answer
  • What happens to the temperature of water when the average kinetic energy of its particles decreases
    9·1 answer
  • A chemist prepares a solution of barium acetate by measuring out of barium acetate into a volumetric flask and filling the flask
    14·1 answer
  • Which model is based on Bohr's quantum model?
    8·2 answers
  • What is true about constructive interference?A.Amplitudes in the opposite direction interfere to make larger waves.B.Amplitudes
    8·1 answer
  • True or false?
    15·2 answers
  • Write down the structural formula for the monomer from which
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!