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
4vir4ik [10]
2 years ago
8

Neap tides, relatively weak tides, occur when the Moon is in position(s)

Chemistry
2 answers:
andrew-mc [135]2 years ago
6 0

Answer:

D) B and D.  Weak tides, called neap tides, are experienced in the Earth's oceans when the sun is in positions B or D. In this case, the sun and moon interfere with each other in producing tidal bulges on Earth.  It is definitely not the other answer since I got it right on USATESTPREP.

worty [1.4K]2 years ago
5 0

Answer:

hello it is B and D.

Explanation:

You might be interested in
What grey rock that has crinoids and brachiopods reacts to hydrochloric acid?
Anon25 [30]
The rock is limestone, I hope this helps!!
5 0
3 years ago
Read 2 more answers
what mass of sodium fluoride (FW=42.0 g/mol) must be added to 3.50 x 10^2 mL of water to give a solution with pH = 8.40?
MaRussiya [10]

Answer:

Explanation:

Sodium fluoride, being a salt, dissolves in water completely producing F ⁻ ions. Now  F⁻ is the conjugate base of the weak acid HF, so in water we will have the following equilibrium:

F⁻  +  H₂O ⇆ HF + OH⁻

Given this equilibrium, we need to calculate Kb from the Ka for HF,  the [ OH ⁻] from the given pH, and finally the mass needed to produce that  OH⁻ concentration.  

The equilibrium constant, Kb , can be calculated from Kw = Ka x Kb, where Kw = 10⁻¹⁴ and Ka for HF is  6.6 x 10⁻⁴ from reference tables.

Kb = 10⁻¹⁴ / 6.6 x 10⁻⁴ = 1.5 x 10⁻¹¹

pH + pOH = 14  ⇒ pOH = 14 - 8.40 = 5.60

[ OH⁻ ] = 10^-5.60 = 2.51 x 10⁻⁶

Now we have all the information :

                                   F⁻                    HF                        OH⁻

Equilibrium                 X                  2.51 x 10⁻⁶            2.51 x 10⁻⁶

(2.51 x 10⁻⁶)² / X  =  1.5 x 10⁻¹¹     ⇒  X =  (2.51 x 10⁻⁶)²  / 1.5 x 10⁻¹¹

X = [ F⁻ ] = 0.41 M

For 350 mL ( 0.35 L ) we need to add:

0.41 mol HF/ 1 L  *  0.35 L = 0.144 mol

and finally the mass will be:

0.144 mol NaF *  42.0 g/mol NaF = 6.03 g NaF

7 0
2 years ago
Any two difference between short sightedness and long sightednes​
SSSSS [86.1K]

Explanation:

tala it is also called myopia lekhnu hai

Äni Arko MA it is also called hypermetropia .

3 0
2 years ago
What type of igneous rock has large crystals
VARVARA [1.3K]
Extrusive rock because it takes longer to cool, making the crystal size larger
5 0
3 years ago
Which of these best explains why the hydrogen atoms in a water molecule are attracted to Cl− ions in sodium chloride (NaCl)?
siniylev [52]
<h2>Answer:</h2><h3>C. The hydrogen atoms have partial positive charges</h3><h3>Hopefully this helps! :)</h3>
5 0
2 years ago
Read 2 more answers
Other questions:
  • Help please and thank you!
    5·2 answers
  • Explain what an ecosystem would look like without scavengers and decomposers.
    11·1 answer
  • How many molecules are ther in 3.5 moles of Corbin dioxide
    7·1 answer
  • Given the following unbalanced chemical reaction: As + NaOH Na3AsO3 + H2 What would be the coefficient of the NaOH molecule in t
    5·1 answer
  • What is the volume of a 0.5 mol/L NaOH solution required to completely react with 20 mL of a 2.0 mol/L HCl solution? What is the
    5·1 answer
  • 50 extra if correct !!
    7·1 answer
  • Explain what occurs in photgraphy reaction???
    10·2 answers
  • What are the chemical building blocks of proteins called?<br> Pls
    9·2 answers
  • How to do this question plz answer
    14·1 answer
  • List the 10 foods that strengthen your immune system and what they have in them that helps you.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!