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
elena-14-01-66 [18.8K]
3 years ago
6

A 5.00 cm^3 sample of gold has a mass of 96.5 g. Calculate the density of gold.

Chemistry
1 answer:
Sholpan [36]3 years ago
8 0

Answer:

\boxed {\boxed {\sf 19.3 \ g/cm^3}}

Explanation:

We are asked to calculate the density of gold. The density of a substance is its mass per unit volume. It is calculated using the following formula.

\rho= \frac{m}{v}

The mass of the sample is 96.5 grams. The volume of the sample is 5.00 cubic centimeters.

  • m= 96.5 g
  • v= 5.00 cm³

Substitute the values into the formula.

\rho= \frac{ 96.5 \ g}{5.00 \ cm^3}

Divide.

\rho= 19.3 \ g/cm^3

The density of gold is <u>19.3 grams per cubic centimeter.</u>

You might be interested in
Part 1. A chemist reacted 15.0 liters of F2 gas with NaCl in the laboratory to form Cl2 and NaF. Use the ideal gas law equation
xeze [42]

Answer:

113 g NaCl

Explanation:

The Ideal Gas Law equation is:

PV = nRT

In this equation,

    > P = pressure (atm)

    > V = volume (L)

    > n = number of moles

    > R = 8.314 (constant)

    > T = temperature (K)

The given values all have to due with the conditions fo F₂. You have been given values for all of the variables but moles F₂. Therefore, to find moles F₂, plug each of the values into the Ideal Gas Law equation and simplify.

(1.50 atm)(15.0 L) = n(8.314)(280. K)

2250 = n(2327.92)

0.967 moles F₂ = n

Using the Ideal Gas Law, we determined that the moles of F₂ is 0.967 moles. Now, to find the mass of NaCl that can react with F₂, you need to (1) convert moles F₂ to moles NaCl (via the mole-to-mole ratio using the reaction coefficients) and then (2) convert moles NaCl to grams NaCl (via molar mass from periodic table). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).

1 F₂ + 2 NaCl ---> Cl₂ + 2NaF

Molar Mass (NaCl): 22.99 g/mol + 35.45 g/mol

Molar Mass (NaCl): 58.44 g/mol

0.967 moles F₂        2 moles NaCl             58.44 g
----------------------  x  -----------------------  x  -----------------------  =  113 g NaCl
                                     1 mole F₂              1 mole NaCl

4 0
1 year ago
Help help help help help
dimaraw [331]

Answer:

neon gas

Explanation:

neon is a noble gas, meaning it has a full outer shell of elections. this means it is stable and is very unlikely to have a reaction with another substance.

7 0
2 years ago
Complete combustion of 8.10 g of a hydrocarbon produced 25.9 g of CO2 and 9.27 g of H2O. What is the empirical formula for the h
balu736 [363]

CxHy     +  O2    -->    x CO2     +    y/2  H2O

 

Find the moles of CO2 :     18.9g  /  44 g/mol   =    .430 mol CO2   = .430 mol of C in compound

Find the moles of H2O:      5.79g / 18 g/mol     =     .322 mol H2O   = .166 mol of H in compound

 

Find the mass of C and H in the compound:

                             .430mol  x 12  =  5.16 g C

                              .166mol  x 1g   = .166g H   

 

When you add these up they indicate a mass of 5.33 g for the compound, not 5.80g as you stated in the problem.

Therefore it is likely that either the mass of the CO2 or the mass of H20 produced is incorrect (most likely a typo).

In any event, to find the formula, you would take the moles of C and H and convert to a whole number ratio (this is usually done by dividing both of them by the smaller value).

8 0
3 years ago
Which of the following compounds would contain an electrostatic attraction as bonds between ions?
4vir4ik [10]

Answer:

iron sulfate

Explanation:

Electrostatic attraction as bonds between ions is characteristic of the electrovalent bond or the ionic bond

In this type of bond, there is electron transfer from one atom to another. The atom that looses electrons become positively charged while the atom that gains electrons becomes negatively charged.

In iron sulfate, there is electrostatic attraction between Fe II ions and sulphate ions, making iron sulfate an ionic compound.

6 0
3 years ago
Which of the following best describes an atomic number? An element's identity is defined by its atomic number; this means it rep
kompoz [17]
It's C, the amount of protons in the nucleus of each atom :)
4 0
3 years ago
Other questions:
  • Determine the mass in grams of 125 mol of neon
    10·1 answer
  • Which nuclear emission is negatively charged?
    13·2 answers
  • An exothermic reaction always _____.
    15·1 answer
  • Write the equation for the esterification of glycerol and three palmitic acids
    13·1 answer
  • Iron(II) is available to bond with chloride ion. How many of each type of ion will bond to form an ionic compound?
    7·1 answer
  • If 1.785 g of ethanol (CHCHOH) is burned in a constant volume calorimeter causing a temperature increase of 4.32C, then what is
    15·1 answer
  • Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of th
    10·1 answer
  • Can someone help me pls.
    8·1 answer
  • What does the heisenberg uncertainty principle state
    15·1 answer
  • A buffer is prepared by adding 150mL of 0.50 M NH3 to 250mL of 0.50 M NH4NO3. What is the pH of the final solution? (Kb for NH3
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!