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
Andrej [43]
3 years ago
8

How much Sr(OH)2 • 8 H2O (M = 265.76) is needed to prepare 250.0 ML of solution in which [OH]= 0.100M?

Chemistry
2 answers:
SVEN [57.7K]3 years ago
6 0
Use the formula 
first step: 
Use the formula 
molarity= mole/liter
change ml to l
plug in data
 to get .1=mole/.25 or .1M*.25liter
which =.025 moles
then divide .025 moles by two because there are two OH in Sr(OH)2 
then multiply that by 265.76 (the molar mass of water) 
.0125*265.76
which is 3.32grams this is your answer 




Flura [38]3 years ago
5 0

The answer is = 3.322grams

The explanation:

1-First we need o get the no.of moles:

moles = molarity * volume(L)

by substitution:

∴ moles = 0.1M * 0.25 L

= 0.025 moles

but we have 2 OH in Sr(OH)2

so moles = 0.025 /2 = 0.0125 moles

2- then we need to get how many grams of it so, we are going to use this formula:

mass = moles * molar mass

by substitution:

∴ mass = 0.0125 * 265.76

= 3.322 grams

You might be interested in
It takes 93.75 mL of a 0.200 M NaOH to neutralize 75.0 mL of an unknown
borishaifa [10]

Answer:

the answer is the second option

5 0
2 years ago
Which of the following is an example of a heterogeneous mixture A.salt-water B.granite C.water(Na)
sladkih [1.3K]
Hi!

B. Granite is an example of a heterogenous mixture.
5 0
2 years ago
Identify a type of strong intermolecular force that exists between water molecules, but does not exist between carbon dioxide mo
timurjin [86]

Intermolecular forces of attraction hold the molecules together. These forces determine the physical properties of substances like melting and boiling points. There are five types of intermolecular forces: Hydrogen bonding, dipole-dipole interactions, ionic interactions, ion-dipole interactions and dispersion forces.

Hydrogen bonding is a stronger force of attraction between hydrogen atom and an electronegative atom (F, N, and O). So, water molecules exhibit hydrogen bonding.

In carbon dioxide molecules, although each C=O is polar the molecule as a whole will be non polar due to symmetry. Therefore, the only intermolecular forces in CO2 will be dispersion forces.

Hence, Hydrogen bonding exists between water molecules but not carbon dioxide molecules.

7 0
3 years ago
Get Organized! A Periodic Table WebQuest
netineya [11]
<h2>Answer:</h2>

What does Atomic number represents ___________.  

What does the Mass number represent ___________  

Periods are _____________ rows.  

Groups are _____________ columns.  

Total elements in periodic table are _____________.

5 0
3 years ago
n-Butane (C4H10) is burned with stoichiometric amount of oxygen. Determine the mole fraction of carbon dioxide and water in the
Fudgin [204]

Answer:

See details below

Explanation:

The balanced reaction equation is given below:

2C_{4} H_{10} + 13O_{2} → 8CO_{2} + 10H_{2} O

Mole fraction of CO2 to H20

= 8/10 = \frac{4}{5}

Mole ratio of C4H10 to CO2 is 2:8 = 1:4

1 mole of n-butane - 38.12 g

4 moles - ?

= 152.48g fuel consumed.

8 0
3 years ago
Other questions:
  • How should scientist respond when new evidence that challenges current is presented?
    14·1 answer
  • Out of the following, which has the least amount of mass? A) protons B) none of the above C) electrons D) neutrons
    11·1 answer
  • Which of the following is an anion?<br><br> A. O2– <br> B. Mg2+ <br> C. Al3+ <br> D. H
    13·2 answers
  • Why do i always hurt the people i love the most
    15·2 answers
  • Predict what you need to do do to use boyle’s law on a macroscopic scale
    11·1 answer
  • Equilateral triangle<br> What’s the answer
    14·2 answers
  • A blue whale has a length of 28,578 millimeters. What is the length of a blue whale in kilometers? Show your work below by writi
    8·1 answer
  • 1.50 moles of argon are at a pressure of 4.125 atm and a temperature of -38.0 degrees C. What is the volume of the sample?
    14·1 answer
  • ______ is the movement of sediment from one place to another
    7·1 answer
  • The picture below shows water ripples interacting.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!