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
allsm [11]
2 years ago
11

How many element are there on the periodic table?

Chemistry
2 answers:
Marina CMI [18]2 years ago
7 0

Answer:

118 elements

Hope that helps

givi [52]2 years ago
5 0

Answer:118

Explanation: it’s right

You might be interested in
Which of the following is not a part of the carbon cycle
BabaBlast [244]
Condensation is NOT part of the carbon cycle
8 0
2 years ago
Read 2 more answers
Please help!!<br> I don’t understand
laiz [17]
<h3>Answer:</h3>

150 g Si

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Use Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 3.2 × 10²⁴ atoms Si

[Solve] grams Si

<u>Step 2: Identify Conversions</u>

Avogadro's Number

[PT] Molar Mass of Si - 28.09 g/mol

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                       \displaystyle 3.2 \cdot 10^{24} \ atoms \ Si(\frac{1 \ mol \ Si}{6.022 \cdot 10^{23} \ atoms \ Si})(\frac{28.09 \ g \ Si}{1 \ mol \ Si})
  2. [DA] Multiply/Divide [Cancel out units]:                                                            \displaystyle 149.266 \ g \ Si

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. Instructed to round to 2 sig figs.</em>

149.266 g Si ≈ 150 g Si

4 0
3 years ago
What is the word for mixture of solids and water, plz an accurate answer, otherwise report.
labwork [276]
Water is H2O but I'm not sure about solids. 
6 0
2 years ago
As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution?
Soloha48 [4]

B) increasesAnswer:

Explanation:

8 0
2 years ago
First, get about 20 mL of the quinine stock solution in a clean beaker to prepare 250 mL of about 2 ppm quinine in 0.05 M H2SO4.
iris [78.8K]

Answer:

Volume of acid, Va=250mL; Volume of quinine,Vb=20mL; Molarity of acid, Ma=0.05M.

Molar mass of acid= H2+S+O4= 2+32+(16X4)= 2+32+64=98g

Concentration of acid, Ca= Molar mass of acid/ Ma =98/0.05=1960g/mol

Explanation: To calculate concentration of quinine, Cb is as follow

Va*Ca=Vb*Cb

∴ Cb=Va*Ca/Vb =250*1960/20 =24500g/mol

5 0
3 years ago
Other questions:
  • What is the density of water at room temperature
    10·1 answer
  • Calculate the mass, in grams, of Al(OH)3 required for this reaction:
    6·1 answer
  • How many grams are in 2.75 moles of Calcium
    5·2 answers
  • It’s a organic chemistry
    7·1 answer
  • Which three elements have strong magnetic properties?
    7·1 answer
  • You heat two substances, A and B. Both substances change color. When cooled, substance A returns to its original color, but subs
    15·2 answers
  • If a car has a force of 490 N forward and encounters a backwards force of
    5·1 answer
  • How do gamma rays differ from a microwave
    10·1 answer
  • How many moles are in 5.6 grams of Na?
    7·2 answers
  • Will any of these properties change after a couple of hours in the sun
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!