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
KATRIN_1 [288]
3 years ago
10

Quiz time!

Chemistry
2 answers:
kykrilka [37]3 years ago
7 0

potassium belongs to group IA of the periodic table.

Rus_ich [418]3 years ago
4 0

group 1A

Explanation:

The family belong on Group.

that what I know

You might be interested in
Calculate the mole fraction of cai2 in an aqueous solution prepared by dissolving 0.400 moles of cai2 in 850.0 g of water.
alukav5142 [94]
1) Formulas:

a) mole fraction of component 1, X1

X1 =  number of moles of compoent 1 / total number of moles

b) Molar mass = number grams / number of moles => number of moles =  number of grams / molar mass


2) Application

Number of moles of CaI2 = 0.400

Molar mass of water = 18.0 g/mol

Number of moles of water: 850.0 g / 18.0 g/mol = 47.22 mol

Total number of moles = 0.400 + 47.22 =47.62

Molar fraction of CaI2 = 0.400 / 47.62 = 0.00840
7 0
3 years ago
Which option is a mixture?<br> A. potassium<br> B. sugar<br> C. water<br> D. salad
PSYCHO15rus [73]

Answer:

D.Salad

Explanation:

A mixture is a substance that combines two or more substance that are physically combined. A mixture can be easily seperated by a physical means . A mixture is the combination of various substances that are not chemically combined .Examples of mixtures are cake and salad . The  cake contains various substances like egg, flour and sugar. This mixture can be easily separated into it individual entities by a physical means .

Base on the option the only mixture among the option is salad . Salad is a a mixtures that combines substances like tomatoes , fruits and vegetable. The individual substances that makes up the salad can be easily separated.

Sugar is a compound . Water is a compound as it contains two elements and potassium is an element.

6 0
3 years ago
Read 2 more answers
What is the molecular formula of the structure below?
taurus [48]

Answer:

C₆H₆

Explanation:

Each border of the figure represents 1 atom of carbon. We have 6 borders = 6 atoms of carbon.

Each atom of carbon form 4 bonds. All the carbons are doing a double bond and a single bond with other carbons. That means are bonded 3 times. The other bond (That is not represented in the figure. See the image) comes from hydrogens. As we have 6 carbons that are bonded each 1 with one hydrogen. There are six hydrogens and the molecular formula is:

<h3>C₆H₆</h3>

This structure is: Benzene

8 0
3 years ago
When a hot dog is cooked, is that a physical change or chemical change
kifflom [539]
Its a Chemical change
4 0
3 years ago
Read 2 more answers
An ice cube tray full of water is put into a freezer. Which energy change occurs in the particles in the water as it undergoes a
o-na [289]

Answer:

A

Explanation:

increase in energy - hotter and/or more reactive

decrease in energy - colder and/or less reactive

Since it is going from a liquid to solid it will have a tighter arrangement of particles.

3 0
2 years ago
Other questions:
  • The formation of soil is primarily the result of
    11·2 answers
  • HELP PLEASE. STRUGGLING. Which of the following is true in an acidic solution? A)The molarity of hydroxide is double the molarit
    10·1 answer
  • Draw the product formed by the reaction of t-butoxide with (1r,2s)-1-bromo-2-methyl-1-phenylbutane (shown below). (draw the corr
    10·2 answers
  • What does this look like? Can someone write out the Stoichiometry starting with 50 grams of carbon (use balanced equation)
    12·1 answer
  • What is the only substance to have half neutron?​​
    5·1 answer
  • Who was on the grand committee
    7·1 answer
  • How could the combustibility of a substance influence how the substance is used?
    11·1 answer
  • When calcium is allowed to react with nitrogen, calcium nitride is formed. If 24.0 g of calcium and 12.0 g of nitrogen are avail
    11·1 answer
  • True or False. Index Fossils are formed from organisms that were alive for short period of geologic time, are extinct, had hard
    6·2 answers
  • If two objects are experiencing the same amount of force, does that mean they will both experience the same amount of accelerati
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!