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
Ivanshal [37]
4 years ago
7

you add 5.6g of iron to 23.60ml if water and observe that the volume of iron and water together is 24.31 ml. calculate the densi

ty​
Chemistry
1 answer:
Papessa [141]4 years ago
8 0

Answer:

8g/mL

Explanation:

Density = Mass/Volume

There is 5.6g of Iron added to the water of 23.60mL and it rose by 0.7mL.

Density = 5.6g/0.7mL of Iron.

You might be interested in
A. Electrons have a charge of_____
Dmitry [639]
Electrons: negative
Protons: positive
Neutrons: nuetral
5 0
3 years ago
Read 2 more answers
A student calculated the mass of a block to be 16.3g. The actual mass of the block is 15.8g. Calculate the student’s percent err
love history [14]

Answer: The student’s percent error is 3.16%.

Explanation:

Calculated mass of the block = 16.3 g

Actual mass of the block = 15.8 g

\% error=|\frac{\text{Calculated Mass}-\text{Actual Mass}}{\text{Actual Mass}}|\times 100

\% error=|\frac{16.3 g-15.8 g}{15.8 g}|\times 100=3.16 \%

The student’s percent error is 3.16%.

7 0
3 years ago
Read 2 more answers
The atomic mass of the elements M,X and Q are 6,11 and 17 respectively. Use the valency electrons to explain how the atoms M and
Mamont248 [21]

Answer:

M is Li, X is boron, and Q is oxygen.  MX is LiB, lithium bromide.  QX is BO, boron oxide (not Body Odor).

Explanation:  The atomic masses don't match exactly with those listed in the periodic table.  Boron, Oxygen, and Lithium come the closest.

Lithium reacts with bromine since it happily donates it's single 2s electron to bromine's 4p orbital to fill bromine's 4s and 4p valence orbitals to go from 7 to 8 valence electrons, it's happy state.

Boron reacts with oxygen to form B2O3, which I'll happily write as O=BOB=O, since my name is Bob.  This is more complex, but both elements want to move electrons around in order to reach a more stable electron configuration.  Boron has 3 valence electrons and oxygen has 6.  So each oxygen needs 2 electrons to fill it's outer shell and boron is happy to lose it's 3 valence electrons to reach an outer shell equiovalent to helium.  So 2 borons contribute a total of 6 electrons, and the 3 oxygens have room for a total of 6 electrons to fill their outer shell.

8 0
3 years ago
Which of the following compounds represents a covalent bond?
Assoli18 [71]
Bis the correct answer
8 0
3 years ago
Given the molar absorptivity for a species X of 1600 M-1cm-1 at a wavelength of 270 nm, and 400 M-1cm-1 at a wavelength of 540 n
Andre45 [30]

Answer:

Explanation:

From the given information:

At wavelength = 270 nm

\varepsilon x_1 = 1600 \ m^{-1} \ cm^{-1}  \\ \\  \varepsilon y_1 = 200 \ m^{-1} \ cm^{-1}

At 270 nm

Suppose x is said to be the solution for the concentration of x and y to be the solution for the concentration of y;

Then:

\varepsilon x_1  \ l + \varepsilon y_1  \ l= 0.5 \\ \\ A = A_1 + A_2

1600 xl + 200 yl= 0.5

Divide both sides by 200

8xl + yl = \dfrac{0.5}{200}

8x + y = \dfrac{0.5}{200}l

Use l = 1cm (i.e the standard length)

Then;

8x + y = \dfrac{0.5}{200} ---- (1)

<u>For 540 nm:</u>

\varepsilon x_2 x  \ l + \varepsilon y_2 y  \ l= 0.5  \\ \\ 40 xl + 800 yl = 0.5

x + 20 y = \dfrac{0.5}{400 \ l}

since l = 1

x + 20 y = \dfrac{0.5}{400 \ } --- (2)

Equating both (1) and (2) together, we have:

8x + y - 8x - 160 y = \dfrac{0.5}{200} - \dfrac{0.5 \times 8}{400}  \\ \\  \implies - 159 y = \dfrac{0.5}{200} ( 1 - \dfrac{8}{2}) \\ \\  -159 y = \dfrac{-0.5 \times 3}{200}  \\ \\  159 \ y = 0.0075  \\ \\  y = \dfrac{0.0075}{159} \\ \\  y = 0.00004716 \\ \\ y = 4.7 \times 10^{-5 } \ M

3 0
3 years ago
Other questions:
  • What is the total amount of matter in an ecosystem doing? always changing always increasing always decreasing remaining the same
    8·1 answer
  • How does an atom become a positive ion? a negative ion?
    6·2 answers
  • Scuba divers wear special belts to help them stay under water. These belts do this by _____.
    13·2 answers
  • NEED HELP ASAP!!! What is the density of each of the following gases at STP? Show your work.
    5·1 answer
  • Uranium and ________ are needed to run a nuclear reactor.
    11·1 answer
  • the atom was thought to be indivisible. Explain the significance of Thomson's concept of the electron.
    9·1 answer
  • You are stranded on survivor island in which there are already 375 other survivors. For every survivor there are two hands, for
    5·1 answer
  • How are forces described?
    5·2 answers
  • PLEASE HELP ASAP
    9·1 answer
  • 7. If you start with 3.20 mol of Li3N and 9.0 mol water, how many moles of NH3 will be formed?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!