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
Blizzard [7]
3 years ago
8

Hydrofluoric acid (HF) can be prepared according to the following equation:

Chemistry
2 answers:
White raven [17]3 years ago
7 0

Answer:

The Hf is 34.78

Explanation:

first put it to moles with the grams times 1mol/ the atomic mass of the element or compound

Artemon [7]3 years ago
3 0

Given the balanced equation:

( Reaction type : double replacement)

CaF2 + H2SO4 → CaSO4 + 2HFI

We can determine the number of grams prepared from the quantity of 75.0 H2SO4, and 63.0g of CaF2 by converting these grams to moles per substance.

This can be done by evaluating the atomic mass of each element of the substance, and totaling it to find the molecular mass.

For H2SO4 or hydrogen sulfate it's molecular mass is the sum of the quantity of atomic mass per element. H×2 + S×1 + O×4 = ≈1.01×2 + ≈32.06×1 + ≈16×4 = 2.02 + 32.06 + 64 = 98.08 u (Dalton's or Da) or g / mol.

For CaF2 or calcium fluoride, it's molecular mass adds 1 atomic mass of calcium and 2 atomic masses of fluoride due to the number of atoms.

Ca×1 + F×2 = ≈40.07×1 + ≈19×2 = 40.08 + 38 = 78.07 u (Da or Dalton's) or g / mol.

You might be interested in
Im hvaing a hard time getting the right answer
Tanya [424]

Answer:

V=23.9mL

Explanation:

Hello!

In this case for the solution you are given, we first use the mass to compute the moles of CuNO3:

n=2.49g*\frac{1mol}{125.55 g}=0.0198mol

Next, knowing that the molarity has units of moles over liters, we can solve for volume as follows:

M=\frac{n}{V}\\\\V=\frac{n}{M}

By plugging in the moles and molarity, we obtain:

V=\frac{0.0198mol}{0.830mol/L}=0.0239L

Which in mL is:

V=0.0239L*\frac{1000mL}{1L}\\\\V=23.9mL

Best regards!

6 0
3 years ago
Why would an atom emit particles or waves from its nucleus?
Neko [114]

Answer:

It’s A non of these

Explanation:

5 0
2 years ago
Explain mole concept using any real life example
andrew-mc [135]

Answer:

for instance :

water , H²O , and hydrogen peroxide . H²O² , are alike

in that their respective molecules are composed of hydrogen and oxygen atomd . hope its helpful . Good luck :)

5 0
3 years ago
What are the top 10 facts about animal cells
bija089 [108]
Nucleus
Dna
Rna
Cell membrane
Mitochondria
Vacuoles
Matter
Nuclear membrane
8 0
3 years ago
Elena held a rock weighing 1 N in her hand. The rock has no velocity. <br> KE________?
nignag [31]

KE = 0

<h3>Further explanation  </h3>

Energy is the ability to do work  

Energy because its motion is expressed as Kinetic energy (KE) which can be formulated as:  

\large{\boxed{\bold{KE=\frac{1}{2}mv^2}}}

So for two objects that have the same speed, the greater the mass of the object, the greater the kinetic energy  

The stone in hand is in a motionless state (at rest) so that its velocity (v) = 0, so it has no kinetic energy

But this stone can have <em>potential energy that is gained due to its height</em>

5 0
3 years ago
Other questions:
  • Draw the conjugate acid of ethanol
    5·1 answer
  • A solution of 0.207 M aspartic acid, the charge neutral form of the amino acid, is titrated with 0.0690 M NaOH . The pKa values
    9·1 answer
  • The balanced equation given below means: CH4 + 2 O2 → CO2 + 2H2O The balanced equation given below means: CH4 + 2 O2 → CO2 + 2H2
    12·2 answers
  • How does dry ice shrink in size
    7·2 answers
  • A family takes a summer vacation to Florida. They drive for 8 hours before stopping at a hotel for the night. They
    11·1 answer
  • Help me pls <br> help me please<br> help me<br> help me please<br> help me pls
    8·1 answer
  • Your paragraph containing
    5·1 answer
  • How many oxygen atoms are there in 1665 grams of iron(II) phosphate? Please explain how you found your answer.
    10·1 answer
  • Which of the following best represents potential energy being converted to kinetic energy? HELP
    9·1 answer
  • 4. Calculate the empirical formula for the following compounds Na=32.4% S=22.6 % O=45.0%
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!