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
Anarel [89]
3 years ago
7

Express the product of 9.0 x 10^-4m and 8.1 x 10^4m using the correct number of significant digits

Chemistry
1 answer:
Assoli18 [71]3 years ago
7 0

Answer:

7.3 × 10¹ m²

Explanation:

The language "product" means that we must multiply the numbers given to get our answer.

9.0 × 10⁻⁴ m × 8.1 × 10⁴ m = 7.3 × 10¹ m²

The significant figures rule for multiplication is that we must us the amount of significant figures in the number with the least significant figures, in this question this is 2 significant digits from both 9.0 × 10⁻⁴ m and 8.1 × 10⁴ m.

You might be interested in
The p K a pKa of acetic acid is 4.76 . 4.76. The p K a pKa of trichloroacetic acid is 0.7 . 0.7. Calculate the equilibrium disso
Andrei [34K]

Answer:

Acetic acid Ka = 1.74 × 10⁻⁵

Trichloroacetic acid Ka = 2 × 10⁻¹

Explanation:

Let's consider the acid dissociation of acetic acid.

CH₃COOH(aq) ⇄ CH₃COO⁻(aq) + H⁺(aq)

The pKa of acetic acid is 4.76. The acid dissociation constant (Ka) is:

pKa = -log Ka

- pKa = log Ka

Ka = anti log (-pKa)

Ka = anti log (-4.76)

Ka = 1.74 × 10⁻⁵

Let's consider the acid dissociation of trichloroacetic acid.

CCl₃COOH(aq) ⇄ CCl₃COO⁻(aq) + H⁺(aq)

The pKa of trichloroacetic acid is 0.7. The acid dissociation constant (Ka) is:

pKa = -log Ka

- pKa = log Ka

Ka = anti log (-pKa)

Ka = anti log (-0.7)

Ka = 2 × 10⁻¹

3 0
2 years ago
Starch is a type of: Protein Fat Nucleic acid Sugar
Svetllana [295]

Answer:

it's not a protien at all

Explanation:

Starch is not a protein. Starch is a type of carbohydrate. It is a polysaccharide, it has lots of sugars though

8 0
2 years ago
The development of nuclear power has provided electricity for less money, but at a cost. What may be considered a "cost" of nucl
Schach [20]
D. A disadvantage of nuclear power is that waste products are unsafe and hard to store. They must be stored for many hundreds of years before they becomes safe and easier to dispose of, and we currently don't have a good method of storing them in the meantime.


4 0
3 years ago
Read 2 more answers
Researchers tested a meteorite for organic molecules containing 13C and 15N, which are carbon and nitrogen atoms with one extra
Hoochie [10]

Answer:

The correct option is  2.No, because only electrons are involved in bonding.

Explanation:

The type of bond formed by carbon and nitrogen (carbon-nitrogen bond) is covalent bond

Also known as molecular bond, a covalent bond involves the sharing of pairs of electrons (known as bonding pairs or shared pairs) between the carbon and nitrogen atoms forming stable, balanced forces in attraction and repulsion as they share common electrons in their compounds.

This electron sharing covalent bond is what enables the formation of the several compounds between carbon and nitrogen for example, in an amine, nitrogen which has five electrons, has two remaining electrons that forms a lone pair whereby it can combine further with other elements.

Hence the factor that influences the bonds to make the numerous organic molecules is the available electrons which constitutes the shared electron pairs in covalent bonds while the neutrons which function is to keep the repulsive forces of positively charged protons from ripping the nucleus apart.

3 0
3 years ago
How to balance the equation Mg2+HO2=Cu3O+H2<br><br>​
Mariulka [41]
I think the answer is 2Mg + H2O4 = Cu12O4 + 2H

I’m really not sure though so it might be wrong… I’m not the best at balancing equations lol
6 0
1 year ago
Other questions:
  • What is the molarity of a solution made by dissolving 18.4 g of potassium perchlorate in enough water to fill a 300.00 mL volume
    10·1 answer
  • How does improving food-storage facilities make farming more sustainable?
    15·2 answers
  • What part of the water is affected by a wave in deep water
    5·2 answers
  • The process by which atoms or molecules leave a liquid and become a gas at a temperature below the boiling point is called:
    7·1 answer
  • Water is separated into hydrogen and oxygen gas by electrolysis
    7·2 answers
  • What pressure in kPa is exerted by 94.60 g CO2 at 57.00 ℃ in 0.7500 L?
    13·2 answers
  • 1. Describe the general procedure on how to wash glassware used for organic lab experiments. Also, include what the common solve
    5·1 answer
  • Which pair of objects is experiencing the greatest gravitational force
    9·2 answers
  • Which is not a redox reaction?
    14·1 answer
  • How many oxygen atoms are there in one molecule of CH3FO?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!