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
Ber [7]
3 years ago
12

What is this and explain why please:)

Chemistry
2 answers:
Yuliya22 [10]3 years ago
8 0

Answer:

C Atomic number

Explanation:

The question is typo it should be 19 is the____ of pottasium. The atomic number is the number on top

Alex777 [14]3 years ago
6 0
I don’t think would have like that to
You might be interested in
How many meters in 1000 mm
iris [78.8K]
1000 mm equals 1 meter
7 0
3 years ago
Read 2 more answers
How many water molecules are created when 32 grams of oxygen react completely with 4.0 grams of hydrogen?
ch4aika [34]

Answer:

d. 1.2 × 1024

Explanation:

From the equation of reaction

2H2 + O2= 2H2O

i.e 2mole(4g) of hydrogen requires 1 mole(32g) of oxygen to produce 2mole (2×6.02×10^23 molecules) of H2O= 1.2×20^24 molcules of water.

NB: 1 mole of H2O contains 6.02×10^23 molecules of H2O

3 0
3 years ago
The melting point of table salt is 801 degrees C. Is this a physical or chemical property?
wolverine [178]
Melting point is a physical property 
6 0
3 years ago
Read 2 more answers
How does thermal energy
BartSMP [9]
Objects would be like a lap, stove, & microwave. There’s many options.
4 0
3 years ago
If you have 250 mL of 0.75 M LINO2.<br> How many grams of this substance<br> would you have?
Vesna [10]

Mass of this substance = 9.928 g

<h3>Further explanation</h3>

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

\boxed{\bold{n=V\times M}}

mol of substance -Lithium nitrite - LiNO₂ :

V = 250 ml = 0.25 L

M = 0.75 M

\tt n=0.25\times 0.75=0.1875

So mass of this substance -  LiNO₂ (MW=52,947 g/mol) :

\tt mass=mol\times MW\\\\mass=0.1875\times 52,947 g/mol\\\\mass=9.928~g

4 0
3 years ago
Other questions:
  • What are the characteristics of a virtual image? Check all that apply.
    14·2 answers
  • What group is Pb (lead) in?
    12·1 answer
  • Of the molecules below, the bond in ________ is the most polar. of the molecules below, the bond in ________ is the most polar.
    12·2 answers
  • What is the molarity of a 2.0 L sodium hydroxide solution containing 10.0 grams of solute?
    9·1 answer
  • "M" represents a metallic element, the oxide of which has the formula M2O. The formula of the chloride of M is..................
    10·1 answer
  • An organism's unique characteristics affect the individual's ability to survive in its environment. true or false
    13·2 answers
  • 2. Why is the lonic compound Nacl (table salt) able to dissolve in a glass of the molecular compound water (H20)? (3 points)
    9·1 answer
  • Iron(II) chloride is formed from the reaction between iron and copper(II) chloride. Fe + CuCl2 FeCl2 + Cu If the reactants have
    12·2 answers
  • Possible isomers of C4H9I​
    12·1 answer
  • · Using a metric ruler with 1 mm divisions, the sides of a rectangular piece of plywood were measured as
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!