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
Leya [2.2K]
3 years ago
15

The ____________________ Era accounts for most of the history of Earth.

Chemistry
2 answers:
Slav-nsk [51]3 years ago
6 0
Pretty sure it's the Precambrian.

balandron [24]3 years ago
4 0
Yup! It's the Precambrian! :)
You might be interested in
Sodium metal reacts with water to produce hydrogen gas according to the following equation: 2Na(s) + 2H2O(l)2NaOH(aq) + H2(g) Th
Maru [420]

Answer:

Number of moles of sodium reacted = 0.707 moles

Explanation:

P(H₂) = P(T) – P(H₂O)

P(H₂) = 754 – 17.5 = 736.5 mm Hg

Use the ideal gas equation which

PV= nRT, where P is the pressure V is the volume, n is the number of moles R is the Gas Constant and T is temperature

<u>Re- arrange to calculate the number of moles and using the data provided</u>

n = P x V/R x T

n =736.5 x 8.77/62.36367 x (mmHg/mol K) x (20 + 273)

n = 0.35348668

n = 0.353 moles H₂

<u>from the equation we know that</u>

0.353 mole H₂ x 2mole Na/1mole H₂, So

0.353 x 2 = 0.707 mole Na

The number of moles of Sodium metal reacted were 0.707 moles.

3 0
3 years ago
GIVING BRAINLYYY
Oksanka [162]
Silver (Ag) is likely to be less reactive
7 0
3 years ago
A water molecule is positively charged at one end and negatively charged at the other end and is said to be \what type of molecu
Mrrafil [7]

Answer:

B. Polar

Explanation:

Hope this helps!

6 0
3 years ago
In any sample of DNA, the amount of adenine (A) equals the amount of _____.
aivan3 [116]
It is equal to amount of thymine
8 0
3 years ago
Read 2 more answers
How is the information about cats found in myths and fairy tales and legends different from information gathered through science
forsale [732]
Scirnce uses a method of testing to declare rules or facts. myth and fairy tales have no way of being tested. cats are a physical creature we can see, test, and observe. a mythical idea canny be tested. for example: mermaids cannot be tested as we have none to observe.
5 0
3 years ago
Other questions:
  • Is there any difference between carbon(iv)oxide and carbon(ii)oxide
    14·1 answer
  • Explain the process on how the conditions for lightning to strike occurs?
    15·1 answer
  • Consider the ionic compound magnesium acetate. How many electrons does the magnesium ion have
    13·1 answer
  • How are lactic and alcoholic fermentation similar?
    13·1 answer
  • 2. How many moles of fluorine are required to produce 12.0 grams of
    15·1 answer
  • Please help mehhhhhhhhhhhhhhhh
    8·1 answer
  • A covalent bond is formed by the following process
    14·2 answers
  • A category of classification below a kingdom? A phylum B domain C species
    13·1 answer
  • In the reaction, Hydrogen + Iodine --&gt; Hydrogen Iodide at equilibrium, some Iodine is is added. What happens to the equilibri
    15·1 answer
  • I'll pay someone to do my chemistry work.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!