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
Alexxandr [17]
2 years ago
14

Why is 99 not a prime number​

Chemistry
2 answers:
Mice21 [21]2 years ago
6 0

Explanation:

99 is not a prime number because it can be multiplied by itself and by other numbers

99*1

9*11

goblinko [34]2 years ago
6 0

Answer:

A prime number is a number that can only be divisible by ±itself and ±1

but 99 can  be divisible by  ±3; ±11 => 99 isnt a prime number

Explanation:

You might be interested in
The expected value for a chemical equation is 47g of water, after an experiment you find that you have 2.58 moles of water. What
strojnjashka [21]
<h3><u>Answer</u>;</h3>

Actual yield = 46.44 g

<h3><u>Explanation;</u></h3>

1 mole of water = 18 g/mol

Therefore;

The experimental yield = 2.58 moles

equivalent to ; 2.58 × 18 = 46.44 g

The theoretical value is 47 g

Percentage yield = 46.44/47 × 100%

                             = 98.8%

The questions asks for actual yield = 46.44 g

6 0
3 years ago
Iron Choose one: A. is alloyed with carbon and chromium to make stainless steel. B. was the first of the common metals (iron, al
Lostsunrise [7]

Answer:

A. is alloyed with carbon and chromium to make stainless steel.

Explanation:

Steel is an alloy formed mainly of iron and carbon but some other metals like chromium are also added in little amounts.

Is steel, the percentage of iron and carbon together is about 90% and the rest metals fall in the 10% part.

Although the cost of steel is low, it has a very high tensile strength and that's why it is used in tools, ships, buildings, trains and in various types of infrastructures.

7 0
2 years ago
True or False <br> the way energy flows through an ecosystem can be shown through a food web
spayn [35]
True energy passes from animal to animal or plant to plant
3 0
3 years ago
Read 2 more answers
HELP TIMED !!!!
Troyanec [42]
Hello there what is the question?

6 0
3 years ago
Read 2 more answers
What is the molar mass of 81.50 g of gas
garik1379 [7]

The molar mass  of gas = 238.29 g/mol

<h3>Further explanation</h3>

Given

mass = 81.5 g

P=1.75 atm

V=4.92 L

T=307 K

Required

molar mass

Solution

The gas equation can be written  

\large{\boxed{\bold{PV=nRT}}

\tt n=\dfrac{mass}{molar~mass}

So the equation becomes :

\tt Molar~mass=\dfrac{mRT}{PV}

Input the value :

\tt M=\dfrac{81.5\times 0.082\times 307}{1.75\times 4.92}\\\\M=238.29~g/mol

5 0
2 years ago
Read 2 more answers
Other questions:
  • HELP ASAP
    7·2 answers
  • How many total atoms are there in 58.7 g of carbon dioxide
    5·1 answer
  • Explain why lattice energy is the key to the formation of a salt
    12·1 answer
  • Sugars such as glucose, fructose, and ribose are examples of _______. A. proteins B. nucleic acids C. carbohydrates D. lipids
    15·2 answers
  • Determine the number of moles and mass of the sample of argon occupying 37.8L at STP​
    15·1 answer
  • Which species is the conjugate base of H2SO3
    14·1 answer
  • As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution?
    8·1 answer
  • Which of these statements describes a physical property of hydrogen? Group of answer choices it is found in acids. it is less de
    6·1 answer
  • What is the wavelength of a wave that has a speed of 350 meters/second and a frequency of 140 hertz? __________ meters
    13·2 answers
  • How does lemon juice stop an apple from turning brown?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!