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
labwork [276]
3 years ago
14

Study the timeline.

Chemistry
2 answers:
Eddi Din [679]3 years ago
6 0

Answer:

4.1 billion years ago

Explanation:

kherson [118]3 years ago
3 0
4.1 billion years ago.
You might be interested in
Please help me..<br>what is carbon 1/12​
tatuchka [14]

Answer:

It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, 1.992646547 × 10−23 gram, which is assigned an atomic mass of 12 units. ... In this scale 1 atomic mass unit (amu) corresponds to 1.660539040 × 10−24 gram.

6 0
3 years ago
If an acid is splashed on your skin, wash it at once with
Morgarella [4.7K]
The answer is a. plenty of water
8 0
3 years ago
Read 2 more answers
An automated filling machine is used to fill bottles with liquid detergent. A random sample of 20 bottles results in a sample va
taurus [48]

Answer:

No, there is no evidence that the manufacturer has a problem with underfilled or overfilled bottles, due that according our results we cannot reject the null hypothesis.

Explanation:

according to this exercise we have the following:

σ^2 =< 0.01 (null hypothesis)

σ^2 > 0.01 (alternative hypothesis)

To solve we can use the chi-square statistical test. To reject or not the hypothesis, we have that the rejection region X^2 > 30.14

Thus:

X^2 = ((n-1) * s^2)/σ^2 = ((20-1)*0.0153)/0.01 = 29.1

Since 29.1 < 30.14, we cannot reject the null hypothesis.

4 0
3 years ago
Read 2 more answers
Which is a NOT a freshwater source on Earth?
cluponka [151]

Answer:

B the atmosphere it's not on earth and I'm pretty sure  the atmosphere doesn't have water in

Explanation:

7 0
2 years ago
Which element has 19 electrons surrounding the nuclei of its atoms?
QveST [7]
I think its potassium
5 0
3 years ago
Other questions:
  • Zn2s + 4 AgNO3ag -&gt; 2 Zn(NO3)2ag + 4 Ags
    5·1 answer
  • The density of gold is 19.3 g/cm? What volume would 109 g of gold have?<br> ОА. .<br> 56.48 cm3
    9·1 answer
  • Suppose a container holds 1000 hydrogen molecules (H2) and 1000 oxygen molecules (O2) that react to form water. How many water m
    8·1 answer
  • A chemical reaction in which one element replaces another element in a compound can be categorized as?
    9·1 answer
  • HCOOH is:<br> formaldehyde<br> formic acid<br> acetone<br> carbon hydroxide
    15·1 answer
  • Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules as necessary. precipita
    12·1 answer
  • I need help solving this!!!
    8·1 answer
  • PLEASE! I need help in chemistry. If you are good in chemistry, please send your gm^ail. I have a lab to send. But I am stuck. P
    10·1 answer
  • When copper oxide is reacted with sulfuric acid, the acid is often gently heated. This is done in order to:
    12·1 answer
  • Electrical Safety Test Take Exam
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!