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
marissa [1.9K]
3 years ago
12

What is the empirical formula of a compound composed of 30.5 g potassium (k) and 6.24 g oxygen (o)?

Chemistry
1 answer:
VLD [36.1K]3 years ago
5 0
K5O2

convert grams to moles, divide both by the smallest mole mass, multiply that until hole.

30.5 g K ÷ 39.10 = .78 mol
6.24 g O ÷ 16 = .39 mol
.78 mol ÷ .39 mol = 2.5
.39 mol ÷ .39 mol = 1
2.5 x 2 = 5
1 x 2 = 2
K5O2

You might be interested in
How have safety concerns about chemicals changed over time?
Alex787 [66]

Answer:

C. As scientists have learned more about chemicals, they have  become more aware of their dangers

Explanation:

Chemicals are substances with standard compositions, held together by chemical bonds. Chemicals can exist in different phases such as solid, liquid, and gaseous phases. Over time, with a growing understanding of chemicals, their composition, and their reaction methods, scientists now have a better knowledge of the dangers chemicals can pose. To that effect, they have created standard safety measures for those who have to work with these chemicals.

When these guidelines are strictly adhered to, the chances of suffering accidents, burns, and explosions with these chemicals are significantly reduced.

8 0
3 years ago
Which element has properties of both metals and nonmetals?
PilotLPTM [1.2K]
<span>Metalloids have the properties of metals and nonmetals.</span>
8 0
3 years ago
In a double-replacement reaction, the _____.
givi [52]
 In a double-replacement reaction, the _____.?


There are many more interesting things to ask about double replacement reactions than are contained in the list given here. But the only correct choice is: 

C.reactants are two ionic compounds

8 0
3 years ago
Read 2 more answers
Determine the pH of a 0.048 M hypochlorous acid (HClO) solution. Hypochlorous acid is a weak acid (Ka = 4.0 ✕ 10−8 M).
storchak [24]

pH of 0.048 M HClO is 4.35.

<u>Explanation:</u>

HClO is a weak acid and it is dissociated as,

HClO ⇄ H⁺ + ClO⁻

We can write the equilibrium expression as,

Ka = $\frac{[H^{+}] [ClO^{-}]  }{[HClO]}

Ka = 4.0 × 10⁻⁸ M

4.0 × 10⁻⁸ M = $\frac{x \times x }{0.048}

Now we can find x by rewriting the equation as,

x² =  4.0 × 10⁻⁸ × 0.048

   = 1.92 × 10⁻⁹

Taking sqrt on both sides, we will get,

x = [H⁺] = 4.38 × 10⁻⁵

pH = -log₁₀[H⁺]

     = - log₁₀[ 4.38 × 10⁻⁵]

   = 4.35

8 0
3 years ago
Nitric acid with a concentration of 1mol/dm has a pH
goldenfox [79]
Water is neutral with ph 7. when we add water to acidic solution, it will be less acidic. so the pH of acid increases
6 0
2 years ago
Other questions:
  • Convert 1.5 mol Na to mass
    10·1 answer
  • Calculate the mass of potassium sulphate required to prepare its 10% solution in 100g water.
    14·1 answer
  • How many electrons does phosphorus have in its valence shell and neutrons in its nucleus, respectively?
    8·1 answer
  • You use a 15.0 gram piece of aluminum foil to cover a pan in the oven. The specific heat for aluminum is c = 0.900 J/g o C. If t
    11·2 answers
  • Which words or phrases describe the outer planets?
    13·1 answer
  • Mayonnaise is made up of eggs, oil, and vinegar. Under which category it should be<br> classified?
    15·1 answer
  • N2 (g) + 2O2(g) = 2NO2 (g) ΔH = 66.4 kJ 2NO (g) + O2 (g) = 2NO2 (g) ΔH = -114.2 kJ the enthalpy of the reaction of the nitrogen
    7·2 answers
  • in an experiment forest, a sample of leaves is weighed over a one year period and is found to lose 83% of its mass. assuming fir
    8·1 answer
  • The pressure decreases as the temperature decreases, if volume and amount of gas do not change.
    8·1 answer
  • The decomposition of water into hydrogen gas Hy and oxygen gas Oz can be modeled by the balanced chemical equation
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!