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
rusak2 [61]
3 years ago
8

In scientific notation, the number 0.00262 is expressed as

Chemistry
2 answers:
harkovskaia [24]3 years ago
5 0

Answer:

2.62*10^-3

Explanation:

To do this by hand, you need to understand the rules of scientific notation.

Lena [83]3 years ago
3 0

Answer:

0.00262 in scientific notation is 2.62 x 10^-3

You might be interested in
A compound has a molecular weight of 146 g/mol. A 0.3250 g sample of the compound contains 0.1605 g of carbon, 0.0220 g of hydro
Sonbull [250]

Answer: The molecular formula is C_6H_{10}S_2

Explanation:

We are given:

Mass of C = 0.1605 g

Mass of H= 0.0220 g

mass of S = 0.1425 g

Step 1 : convert given masses into moles.

Moles of C =\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{0.1605g}{12g/mole}=0.0134moles

Moles of H =\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.0220g}{1g/mole}=0.0220moles

Moles of S =\frac{\text{ given mass of S}}{\text{ molar mass of S}}= \frac{0.1425g}{32g/mole}=0.0044moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = \frac{0.0134}{0.0044}=3

For H = \frac{0.0220}{0.0044}=5

For S =\frac{0.0044}{0.0044}=1

The ratio of C : H: S=  3: 5: 1

Hence the empirical formula is C_3H_5S

The empirical weight of C_3H_5S = 3(12)+5(1)+1(32)= 73g.

The molecular weight = 146 g/mole

Now we have to calculate the molecular formula.

n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{146}{73}=2

The molecular formula will be=2\times C_3H_5S=C_6H_{10}S_2

7 0
3 years ago
How many milliliters of 0.121 M HCl are needed to neutralize 44.3 mL 0.274 M Ba(OH)2? Write the equation and don't forget to bal
Sergeeva-Olga [200]

Answer:

100 mL is the volume of HCl needed to neutralize the 44.3 of Ba(OH)₂

Explanation:

This is the chemical equation:

2HCl + Ba(OH)₂  →  BaCl₂ + 2H₂O

Formula for neutralization is:

Molarity of acid . Volume of acid = Molarity of base . Volume of base

0.121 . Volume of acid = 0.274 . 44.3

Volume of acid = (0.274 . 44.3) / 0.121 → 100

6 0
3 years ago
Possible isomers of C4H9I​
amm1812

Answer:

there are 4 possible isomers

5 0
3 years ago
n a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?
Klio2033 [76]
He is using the filtration method.
It’s a technique which is used for separation of solids and fluids by putting them through a medium which allows only fluid to pass through, leaving the solids (in this case the soil) alone.
The fluid that passed is called the filtrate.
7 0
4 years ago
Where on the pH scale would you find acids? Bases? What is unique about a pH of 7?
Alex777 [14]

Answer:

Demonstrate familiarity with the pH scale ... body (excluding things like stomach acid) measure around 7.2 and 7.6 on the pH scale (a 7 is neutral on the scale). ... The pH of a solution is a measure of its acidity or alkalinity (base). ... Using a pH meter, you find the pH of an unknown solution to be 8.0.

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • What are two properties of neural substance?
    9·1 answer
  • What are 4 properties that krypton has?
    5·2 answers
  • Which of the following describes a solution containing an electrolyte?
    14·1 answer
  • How many moles are 5.42 x 1026 atoms of calcium?
    14·2 answers
  • In a oxidation–reduction reaction, oxidation and reduction must occur simultaneously. Is this statement true or false?
    12·1 answer
  • 3. Which of the following is NOT a
    9·1 answer
  • A sample of water at 0 ºC has a mass of 10 grams. How much energy is absorbed when this sample melts?
    7·1 answer
  • What temperature change in °C is produced when 4430 Joules are absorbed by 237 grams of water?
    7·1 answer
  • Chemical changes are changes that involve a change in the chemical identity of a substance. In other words, a new chemical or su
    11·1 answer
  • The sparse area surrounding a spiral galaxy is called its
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!