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
masha68 [24]
3 years ago
8

I thought heavy elements like iron & gold were dense & sank into the interior of the molten planet? How did gold get on

top of the less dense crust?
Chemistry
1 answer:
Pavel [41]3 years ago
6 0

Answer:

If it is denser then water it shall float  but if water has a higher density the object sinks

Explanation:

You might be interested in
Which of the following has the highest concentration?
Andreyy89

Answer:

ℂ

Explanation:

ℂ

5 0
2 years ago
Imagine you had HCl with a concentration of exactly 0.10 mol/dm3. If 0.023 dm3 of a sodium hydroxide solution, NaOH (aq), could
polet [3.4K]

Answer:

Explanation:

Step 1: Calculate the amount of sodium hydroxide in moles

Volume of sodium hydroxide solution = 25.0 ÷ 1,000 = 0.0250 dm3

Rearrange:

Concentration in mol/dm3 =

Amount of solutein mol = concentration in mol/dm3 × volume in dm3

Amount of sodium hydroxide = 0.100 × 0.0250

= 0.00250 mol

Step 2: Find the amount of hydrochloric acid in moles

The balanced equation is: NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

So the mole ratio NaOH:HCl is 1:1

Therefore 0.00250 mol of NaOH reacts with 0.00250 mol of HCl

Step 3: Calculate the concentration of hydrochloric acid in mol/dm3

Volume of hydrochloric acid = 20.00 ÷ 1000 = 0.0200 dm3

Concentration in mol/dm3 =

Concentration in mol/dm3 =

= 0.125 mol/dm3

Step 4: Calculate the concentration of hydrochloric acid in g/dm3

Relative formula mass of HCl = 1 + 35.5 = 36.5

Mass = relative formula mass × amount

Mass of HCl = 36.5 × 0.125

= 4.56 g

So concentration = 4.56 g/dm3

8 0
2 years ago
Help!
maks197457 [2]

Answer:

First 1-5 in pics

I can't upload further reactions

Explanation:

  1. sandmeyer's reaction
  2. swarts reaction
  3. Finkelstein reaction
  4. wurtz reaction
  5. reimer teimann reaction

6. Lucas test

ROH + Zncl2 +HCl ---> RCl + H2O

7. esterification

R-OH +R’-COOH +H+↔ R’-COOR

3 0
2 years ago
16. What are the reactants in the equation?
Dimas [21]
5. Iron and chlorine
4 0
3 years ago
Which describes reproducibility
Leya [2.2K]
Reproducibility is a major principle of the scientific method. It means that a result obtained by an experiment or observational study should be achieved again with a high degree of agreement when the study is replicated with the same methodology by different researchers.
6 0
3 years ago
Other questions:
  • 1) Humans have how many sets of teeth?
    6·1 answer
  • The half-life of C-14 is 5470 years. If a particular archaeological sample has one-quarter of its original radioactivity remaini
    15·2 answers
  • Find the mass in 6.2 miles of lithium bromide, show work
    5·1 answer
  • Combining Boyle's law and Charles' law forms one presure-temperature-volume relationship and holds the mass of the gas constant.
    15·1 answer
  • Considering the steps involved in dissolution, which of the following do you expect to speed up a dissolution process?
    12·1 answer
  • Practicing Density Calculations: A 4.80 gram piece of magnesium displaces 2.76 mL of water when it’s placed in a graduated cylin
    11·1 answer
  • Sodium sulphate reacts with calcium nitrate to produce sodium nitrate and calcium sulphate. A) identify the reactants and produc
    9·1 answer
  • How many valence electrons does an atom of Iodine have?<br><br> a) 5 <br> b) 6 <br> c) 7 <br> d) 8
    6·2 answers
  • since an element always has a different number of protons, the mass can indicate how many neutrons are in an isotope
    8·1 answer
  • What is a water cycle​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!