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
enot [183]
3 years ago
14

The number of significant figures in 0.000820 g is?

Chemistry
1 answer:
lubasha [3.4K]3 years ago
7 0
There are 3 sig figs.  8 and 2 are obvious.  The ending 0 is significant because it is at the end of a decimal number, and doesn't have to be measured.
You might be interested in
What is the difference between a carnivore and a herbivore?? ​
agasfer [191]

meat-eating carnivores have teeth for tearing and skulls capable of biting with great force, while the plant-eating herbivores have teeth and skulls equipped to grind tough vegetation

6 0
3 years ago
Read 2 more answers
A negative change in entropy indicates that...
vovangra [49]

Answer:

B. the products have a smaller number of available energy microstates than the reactants.

4 0
2 years ago
Read 2 more answers
How many grams of silver chromate will precipitate when 150. mL of 0.500 M silver nitrate are added to 100. mL of 0.400 M potass
sergiy2304 [10]

The amount of silver chromate that precipitates after addition of solutions is 12.44 g.

Number of moles:

The number of moles is the product of molarity of the solution and its volume. The formula is expressed as:

Moles = Molarity x Volume

Calculations:

Step 1:

The molecular formula of silver nitrate is AgNO3. The number of moles of silver nitrate is calculated as:

Moles of AgNO3 = 0.500 M x (150/1000) L

= 0.075 mol

Step 2:

The molecular formula potassium chromate is K2CrO4. The number of moles of potassium chromate is calculated as:

Moles of K2CrO4 = 0.400 M x (100/1000) L

= 0.04 mol

Step 3:

The balanced chemical reaction between AgNO3 and K2CrO4 is:

2AgNO3 + K2CrO4 -----> Ag2CrO4 + 2KNO3

The required number of moles of K2CrO4 = 0.075 mol/2 = 0.0375 mol

The given number of moles of K2CrO4 (0.04 mol) is more than the required number of moles (0.0375 mol). Therefore, AgNO3 is the limiting reagent.

Step 4:

According to the reaction, the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Hence, the number of moles of Ag2CrO4 formed is 0.0375 mol.

The molar mass of Ag2CrO4 is 331.74 g/mol.

The mass of Ag2CrO4 is calculated as:

Mass = 0.0375 mol x 331.74 g/mol

= 12.44 g

Learn more about precipitation here:

brainly.com/question/13859041

#SPJ4

6 0
1 year ago
An object with a mass of 24g and a volume 6mL has a density of?
algol [13]
A. 0.25 g/mL
Because 6/24 is 0.25
8 0
2 years ago
Read 2 more answers
How much does REAL carbon fiber cost ? lets say as big as a piece of paper
coldgirl [10]

Answer:

Today, the average total production cost of “standard modulus” carbon fiber is in the range of $7-9 per pound.

8 0
2 years ago
Other questions:
  • What belief do Deists hold about the universe?
    10·2 answers
  • Which statement best describes the difference between a physical change and a chemical change?
    5·2 answers
  • An iron nail with a mass of 12 g absorbs 12 J of heat.
    5·1 answer
  • Help me out please this is hard​
    9·2 answers
  • a. Choose the best response for the following. The ionization energy for the chlorine atom is equal in magnitude to the electron
    7·1 answer
  • calculate the molarity of a solution that contains 2 moles of NaOH dissolve in 0.5 liter of the solution
    6·1 answer
  • Which body systems help to exchange oxygen and carbon dioxide?
    12·1 answer
  • Find the hybridization of carbon in acetone​
    15·1 answer
  • Dmitri mendeleev contribution to the periodic table.
    6·1 answer
  • 2. Calculate the atomic mass of the following elements i. Silicon ii. Magnesium iii. Potassium.​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!