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
mash [69]
3 years ago
13

Approximately _____ elements occur naturally on earth.

Chemistry
2 answers:
boyakko [2]3 years ago
5 0
90 elements occur naturally on earth.
Aliun [14]3 years ago
4 0
For the answer to the question above, the number of naturally occurring elements is actually in dispute, believe it or not. Some say 98, others say 88 and all cite various reasons. The traditionally accepted answer would be 92.
I hope this helps.
You might be interested in
The elements lithium and oxygen react explosively to from lithium oxide (Li2O). How much lithium oxide will form if 3.03 mol of
lianna [129]
The reaction equation:
2Li + O → Li₂O

Molar ratio of Li to Li₂O is:
2 : 1
So if 3.03 moles of Li are present:
2/1 = 3.03 / x
x = 1.515 moles of Li₂O will be produced.
7 0
3 years ago
A compound is found to contain 42.88 % carbon and 57.12 % oxygen by weight. To answer the questions, enter the elements in the o
Ipatiy [6.2K]

Answer:

The empirical formule is CO

Explanation:

Step 1: Data given

Suppose the mass of a compound is 100 grams

Suppose the compound contains:

42.88 % C = 42.88 grams C

57.12 % O = 57.12 grams O

Molar mass C = 12.01 g/mol

Molar mass O = 16.0 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles C = mass C / molar mass C

Moles C = 42.88 grams / 12.01 g/mol

Moles C = 3.57 moles

Moles O = 57.12 grams / 16.0 g/mol

Moles O = 3.57 moles

Step 3: Calculate the mol ratio

We divide by the smallest amount of moles

C: 3.57 moles / 3.57 moles = 1

O: 3.57 moles / 3.57 moles = 1

The empirical formule is CO

3 0
2 years ago
When using 100ml or 50ml graduated cylinder to what decimal place can your volume be estimated?<br>​
Olegator [25]

Answer:

I know that the 100-mL graduated cylinders are always read to 1 decimal place.

I think for 50 mL graduated cylinders, it lets you measure volumes up to 50.0 mL to the nearest 0.1 or 0.2 mL, depending on your exact cylinder.

3 0
3 years ago
Please help asappp‍♀️!
solniwko [45]
Can you show me the passage?
6 0
3 years ago
Read 2 more answers
An atom has atomic number of 34. how many protons and electrons does it have? what is its symbol? 34 protons and electrons. se l
AURORKA [14]
Se: Selenium

Protons: 34
Electrons: All atoms in the periodic table are neutral until changed otherwise
Neutrons: 44
Atomic Mass: 78.09

>Symbol attached<

4 0
3 years ago
Other questions:
  • The instrument that is commonly used to measure the intensity of radioactivity is called a _____.
    9·2 answers
  • At constant temperature and pressure, 5.0 L of SO2 is
    12·1 answer
  • What is the percent yield of a reaction in which 51.5 g of tungsten(VI) oxide (WO3) reacts with excess hydrogen gas to produce m
    11·2 answers
  • Scientists use this method to create plants that have higher nutritional values
    5·1 answer
  • Which of the following SI or metric units is a base unit?
    9·1 answer
  • Which of the following is true when 1 M KCl is diluted to semi-molar KCl?
    5·1 answer
  • How many moles of NaOH are in a 50.0 g sample of NaOH?
    7·2 answers
  • Na Sa Bant HCL -&gt; 50g Hao pt Soy​
    9·1 answer
  • Limiting line of bakmer series result when electron jumps from orbit: A) 3 to 2 B) infinity to 2 C) 4 to 5 D) infinity to 1
    13·2 answers
  • 5. Which phase of matter can be defined as:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!