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
Nady [450]
3 years ago
12

Two separate masses of zinc were measured on a laboratory balance. The first zinc had a sample mass of 210.10g, and the second z

inc sample had a mass of 235.10g. The two samples were combined. The volume of the combined sample was found to be 62.3ml. Express the mass and density of the zinc sample in the correct number of significant figures.
Chemistry
1 answer:
wlad13 [49]3 years ago
3 0

Answer:

Density is  7.15 g /mL.

Mass is  445.2 g.

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Given data:

Mass of first zinc sample = 210.10 g

Mass of second zinc sample = 235.10 g

Combined volume = 62.3 mL

Density of combined sample ?

Mass of combined sample = ?

Solution:

Mass of combined sample = 210.10 g + 235.10 g = 445.2 g

density = mass / volume

density = 445.2 g / 62.3 mL

density = 7.15 g /mL

You might be interested in
What is radioactive dating in chemistry? <br>PLEASE HELP!!!
VARVARA [1.3K]
Radioactive dating uses the concept of half life to determine the age of something.
The general idea is that elements exist naturally as a combination of isotopes. Some isotopes are stable while others decay radioactively. The half-life of a radioactive isotope is the time required to reduce the initial quantity of the isotope by 50% through the process of radioactive decay.
Carbon 14 dating works this way. A tree growing in the past would have an equilibrium mixture of C-12 and C-14 atoms in proportions consistent with living matter today. We know this value.
When that tree dies, it no longer accumulates new carbon atoms from carbon dioxide in the atmosphere (through photosynthesis). At this point, the proportion of C-14 in the organic matter that was the tree decreases due to the decay of C-14 to an isotope of nitrogen.
When we dig up the remnants of the tree today, we can measure the proportion of C-14 to C-12 and see how much it has been reduced. From this we can calculate backwards using the half life of C-14 (5730 years) to estimate how old the remains of the tree are.
7 0
2 years ago
What is the molarity of a solution of Cu2SO4 if 250.0 mL of solution contains 14.1 g of Cu2SO4?
balu736 [363]
Copper(I) compounds in aqueous solutions are unstable and disproportionate:
Cu₂SO₄ = Cu + CuSO₄
Necessary for dissolution of non-aqueous solvent.

M(Cu₂SO₄)=223.16 g/mol
m(Cu₂SO₄)=14.1 g
v=0.250 L

n(Cu₂SO₄)=m(Cu₂SO₄)/M(Cu₂SO₄)

c=n(Cu₂SO₄)/v=m(Cu₂SO₄)/(vM(Cu₂SO₄))

c=14.1/(0.250*223.16)=0.253 mol/L

0.253 M

5 0
3 years ago
Read 2 more answers
Which of the following is an example of a covalent bond?
loris [4]

Answer:

C. H2O

yep this one is right

4 0
3 years ago
Compound that contains a terminal carbonyl?
malfutka [58]

Many compunds have a terminal carbonyl

Aldehyde, Ketone, Carboxylic acid, Amide, Imide, Acid anhydride are the first that come to my mind.

7 0
3 years ago
Which of the following sequences of elements would all have four valence electrons?
timama [110]

Answer:b

Explanation:

8 0
2 years ago
Other questions:
  • How is temperature related to the physical change of a substance?<br><br>​
    11·2 answers
  • Fill In The Blanks:
    5·1 answer
  • Draw the products for the proton transfer reaction between sodium hydride and ethanol
    14·1 answer
  • A chemist wants to find Kc for the following reaction at 709 K:2NH3(g) + 3 I2 (g) ----&gt; 6HI(g) + N2(g)
    5·1 answer
  • Suppose you are asked to determine whether a nugget is made of gold on the basis of its density. You weigh the nugget and find t
    8·1 answer
  • How many atoms is 50 g of He?
    7·1 answer
  • Question 3 of 10
    10·2 answers
  • 17. A sample of oxygen gas has volume 150.0 mL, at 0.947 atm, what will be the volume of the gas at 750.12 mm of Hg if temperatu
    10·1 answer
  • describe the differences of the kinetic energy of a cold water solution to that of a hot water solution
    11·2 answers
  • The beakers on the left and right both contain the same amount of HCL (liquid) and the same mass of calcium carbonate (solid). I
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!