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
givi [52]
3 years ago
13

How fast do electromagnetic waves travel? *

Chemistry
1 answer:
ivann1987 [24]3 years ago
5 0
Answer : speed of light
You might be interested in
A concentrated aqueous solution of Pb(NO3)2 is slowly added to 1.0 L of a mixed aqueous solution containing 0.010 M Na2CrO4 and
Oduvanchick [21]

Answer:

This means the amount of PbCrO4 will precipitate first, with a [Pb^2+] concentration of 1.8*10^-12 M

Explanation:

Step 1: Data given

Molarity of Na2CrO4 = 0.010 M

Molarity of NaBr = 2.5 M

Ksp(PbCrO4) = 1.8 * 10^–14

Ksp(PbBr2) = 6.3 * 10^–6

Step 2: The balanced equation

PbCrO4 →Pb^2+ + CrO4^2-

PbBr2  → Pb^2+ + 2Br-

Step 3: Define Ksp

Ksp PbCrO4 = [Pb^2+]*[CrO4^2-]

1.8*10^-14 = [Pb^2+] * 0.010 M

[Pb^2+] = 1.8*10^-14 /0.010

[Pb^2+] = 1.8*10^-12 M

The minimum [Pb^2+] needed to precipitate PbCrO4 is 1.8*10^-12 M

Ksp PbBr2 = [Pb^2+][Br-]²

6.3 * 10^–6 = [Pb^2+] (2.5)²

[Pb^2+] = 1*10^-6 M

The minimum [Pb^2+] needed to precipitate PbBr2 is 1*10^-6 M

This means the amount of PbCrO4 will precipitate first, with a [Pb^2+] concentration of 1.8*10^-12 M

5 0
3 years ago
NaOH(aq) + MgSO4(aq) →
Cerrena [4.2K]

Answer:

if balanced reaction then 2 NaOH + MgSO4 → Mg(OH)2 + Na2SO4

Explanation:

3 0
3 years ago
Pls help me no links
Assoli18 [71]

Answer:

mixture

Explanation:

6 0
3 years ago
Read 2 more answers
Chloroform (CHCl3), an important solvent, is produced by a reaction between methane and chlorine. CH4(g) + 3 Cl2(g) CHCl3(g) + 3
PIT_PIT [208]
CH₄(g) + 3 Cl₂(g) → CHCl₃(g) + 3 HCl(g)
From the equation we notice that 1 mole of methane produces 1 mole of chloroform:
16 g Methane → 119.38 g Chloroform
?   g Methane → 37.5 g Chloroform
by cross multiplication:
= (16 * 37.5) / 119.38 = 5.0 g methane
4 0
3 years ago
For which of the following processes would you expect there to be an increase entropy
adoni [48]
CaBr2(s) Ca+2(aq)+2Br-(aq) which means, <span>Solid is turning into free ions so entropy is increasing .</span>
6 0
3 years ago
Other questions:
  • A 3.0 L solution contains 73.5 g of H2SO4. Calculate the molar concentration of the solution.
    7·1 answer
  • Suppose a platinum atom in the oxidation state formed a complex with two chloride anions and two ammonia molecules. Write the ch
    13·1 answer
  • What mass of carbon is present in 1.4*x10^20 molecules of sucrose?
    5·1 answer
  • During soldering, a mixture of metals ('solder') is heated until it melts. The molten metal falls into the gaps between two piec
    15·1 answer
  • What is the volume of 3.14 M aqueous acid solution that contains 9.25 g of HCLO4
    14·1 answer
  • What is a hypothesis
    7·2 answers
  • How many sigma and pi bonds are there in phenol?
    7·1 answer
  • _______ are used because they're economical, easy to process, easy to transport, and the infrastructure exists for their storage
    15·1 answer
  • What is the answer to this question?
    14·1 answer
  • Why was the measurement unit for metal content in Experiments 1 and 2 different? In Experiment 1:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!