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
jonny [76]
3 years ago
7

If a 65 kilogram student exerts a force with a magnitude of 100 N on a 100 kilogram desk the magnitude of the force that the des

k exerts on him is ____. Question 4 options: A.100 N more than his weight B. 100 N less than his weight C. 100 N D. 0 N
Chemistry
1 answer:
mrs_skeptik [129]3 years ago
4 0
C. The action/reaction law states that a force is equal in both directions.
You might be interested in
Which has a higher average speed of molecules 95 degrees Celsius or 95 degrees Fahrenheit ​
shutvik [7]

Answer:

95(ninety five) degrees Celsius

6 0
3 years ago
Read 2 more answers
This question is about iron three of the raw material added to a blast furnace used to extract iron from henatite are coke hemat
IrinaVladis [17]

Answer: The fourth material that is added to the blast furnace is HOT AIR which provides OXYGEN for used for combustion of carbon (Coke).

Explanation:

Iron is the second most abundant metal found in the earth's crust after aluminium. It is not found in the free metallic state but are extracted from rocks which are rich in iron that contains other materials. These are known are iron ores and the most common iron ores are haematite ( Fe2O3).

Iron can be extracted from its ore with the used of blast furnace. The materials used for extraction of iron includes:

--> Coke

--> haematite( iron ore)

--> limestone and

--> Hot air.

The iron ore is first roasted in air so that iron(III)oxide is produced. The iron(III)oxide is then mixed with coke and limestone and heated to a very high temperature. Hot air is introduced into it from the bottom of the furnace. The coke is oxidizes the the oxygen in the hot air blast to liberate carbondioxide.

7 0
3 years ago
Silver tarnish consists of silver sulfide. what is its chemical formula?
Andreyy89
<span>Ag2S Ag(silver) has a charge of 1+ S2-(Sufide has a charge 2- you need balance charge have to equal to zero so you need 2 silvers and one sulfide to have equilibrium</span>
3 0
3 years ago
How many grams of Na2So4 would be formed if 0.75 moles of NaOH reacted?
Nata [24]

Answer:

\boxed{\text{53 g }}

Explanation:

You don't give the reaction, but we can get by just by balancing atoms of Na.

We know we will need the partially balanced equation with masses, moles, and molar masses, so let’s gather all the information in one place.

M_r:                                 142.04  

             2NaOH + … ⟶ Na₂SO₄ + …  

n/mol:      0.75

1. Use the molar ratio of Na₂SO₄ to NaOH to calculate the moles of NaF.

Moles of Na₂SO₄ = 0.75 mol NaOH × (1 mol Na₂SO₄/2 mol NaOH

= 0.375 mol Na₂SO₄

2. Use the molar mass of Na₂SO₄ to calculate the mass of Na₂SO₄.

Mass of Na₂SO₄ = 0.375 mol Na₂SO₄ × (142.04 g Na₂SO₄/1 mol Na₂SO₄) = 53 g Na₂SO₄

The reaction produces \boxed{\text{53 g }} of Na₂SO₄.

4 0
3 years ago
Compare a mixture and a compound. How are they alike?
harina [27]

Answer:

1.Difference.

Mixtures are physically combined and can be separated by physical means while compounds are chemically combined and are separated by chemical means.

2.Mixtures do not have mixed boiling and melting points while compounds have mixed boiling and melting points.

2.Similarity.

Both mixtures and compounds are composed of two or more substances or elements combined.

Both can be separated.

7 0
3 years ago
Other questions:
  • Explain why pure water has a very slight electrical conductivity.
    8·1 answer
  • Write the chemical equation for the reaction of lithium hydroxide (LiOH) with an Arrhenius acid of your choosing. Name and write
    8·1 answer
  • How many cups of beer are in a keg?
    7·1 answer
  • In the reaction of chlorine with calcium, explain which atom is oxidized.
    5·1 answer
  • If there are 2.54cm in one inch how many Inches are in 19.9​
    5·2 answers
  • 5.40X10^2kj converted into j
    6·1 answer
  • What is the measurement?
    8·1 answer
  • PLS HELP ME
    13·1 answer
  • C. A 75 lb (34 kg) boy falls out of a tree from a height of 10 ft (3 m). (3 points)
    7·1 answer
  • A girl and her dog are running away from their house. The dog has a mass of 20kg. The girl has a mass of 60 kg.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!