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
makvit [3.9K]
3 years ago
8

Periodic Law Directed Reading

Chemistry
2 answers:
kolbaska11 [484]3 years ago
8 0

Answer:

C

Explanation:

spayn [35]3 years ago
4 0

Answer:Developed a method for organizing elements based on their atomic number

Explanation:

You might be interested in
How many O atoms are in 1.50 mol of sodium carbonate.
Damm [24]

There are 2.71*10^24 atoms of oxygen.

1st) It is necessary to calculate the amount of oxygen in 1.50mol of sodium carbonate (Na2CO3).

We know that 1 mole of sodium carbonate has 3 moles of oxygen, so to calculate the moles of Oxygen in 1.50 moles of Na2CO3 we can use a mathematical Rule of Three:

\begin{gathered} 1molNa_2CO_3-3molO \\ 1.5molNa_2CO_3-x=\frac{1.5molNa_2CO_3\cdot3molO}{1molNa_2CO_3} \\ x=4.5molO \end{gathered}

Now we know that there are 4.5 moles of oxygen in 1.50 moles of sodium carbonate.

2nd) Finally, we can calculate the atoms of oxygen using the Avogadro's number (6.022*10^23 atoms/mol):

\begin{gathered} 1\text{mol}-6.022\cdot10^{23}atoms \\ 4.5\text{mol}-x=\frac{4.5\text{mol}\cdot6.022\cdot10^{23}atoms}{1\text{mol}} \\ x=2.71\cdot10^{24}atoms \end{gathered}

So, there are 2.71*10^24 atoms of oxygen in 1.50 mol of sodium carbonate.

8 0
1 year ago
if a continental polar air mass is moving across the United States , what will likely happen to the regions of the country that
krek1111 [17]

Answer:

the same thing that happens to United states will happen to other regions

Explanation:

5 0
3 years ago
What is the empirical formula of the compound with the molecular formula c18h36?
emmasim [6.3K]
When we write a formula of a compound in its simplest form, it is empirical formula.
Given the molecular formula is = C₁₈H₃₆
Now we can relate both empirical and molecular formula as;
Molecular formula = n x empirical formula
C₁₈H₃₆ = 18 x CH₂
So the empirical formula of C₁₈H₃₆ is CH₂
6 0
3 years ago
What is the answer to this?
beks73 [17]

Answer:

hm step by step try to figure it 9ut

8 0
2 years ago
The chemical equation below shows the decomposition of nitrogen triiodide (NI3) into nitrogen (N2) and iodine (I2). 2NI3 Right a
yuradex [85]

The moles of I₂ will form from the decomposition of 3.58g of NI₃ is 0.0136 moles.

<h3>How we calculate moles?</h3>

Moles of any substance will be calculated as:

n = W/M, where

W = required mass

M = molar mass

Given chemical reaction is:

2NI₃ → N₂ + 3I₂

Moles of 3.58g of NI₃ will be calculated as:

n = 3.58g / 394. 71 g/mol = 0.009 moles

From the stoichiometry of the solution, it is clear that:

2 moles of NI₃ = produce 3 moles of I₂

0.009 moles of NI₃ = produce 3/2×0.009=0.0136 moles of I₂

Hence, option (3) is correct i.e. 0.0136 moles.

To know more about moles, visit the below link:

brainly.com/question/15303663

8 0
2 years ago
Other questions:
  • 1. A student calculated the theoretical yield of BaSO4(s) in a precipitation experiment to be 1.352 grams. When she filtered, dr
    5·1 answer
  • one advantage of recording data accurately is that you can _____. control the results repeat the experiment eliminate mistakes a
    9·1 answer
  • The type of radiation which is identical to a height energy electron is known as a
    11·1 answer
  • Can somebody try and answer 1 of these questions also for 5 answer in 3 sentences thx!!!!
    5·1 answer
  • A plane flew for 2 hours at 467 mph
    13·1 answer
  • How many miles will a person run an 800 km race?
    11·1 answer
  • Help pls anyone asap
    5·2 answers
  • Our sun is a big ball of ______ &amp; _______ gases
    8·2 answers
  • PLEASE HELPPPP
    5·1 answer
  • She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts foun
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!