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
Lady bird [3.3K]
2 years ago
10

Does anyone have the 2020 paper for chemistry

Chemistry
1 answer:
timama [110]2 years ago
6 0

Answer:

Erm.......... can you clarify what "paper", you just said "paper" there's a lot.

Explanation:

You might be interested in
How do you find the number of valence electrons
Ganezh [65]

Answer:LULULLUL

Explanation:

6 0
3 years ago
Read 2 more answers
What specific electrophile does benzene attack when it undergoes nitration??
Deffense [45]
<span><span>The reaction is as follows:
        C6H6   </span>+   HNO3   +      H2SO4     ------------> </span>C6H5NO2<span>   +   H</span>2<span>O
(BENZENE) (NITRIC ACID)(CATALYST)
</span>NO2(+) is the electrophile that acctacks on the benzene ring in nitration process.
7 0
3 years ago
A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and
kvasek [131]

<u>Given:</u>

Moles of He = 15

Moles of N2 = 5

Pressure (P) = 1.01 atm

Temperature (T) = 300 K

<u>To determine:</u>

The volume (V) of the balloon

<u>Explanation:</u>

From the ideal gas law:

PV = nRT

where P = pressure of the gas

V = volume

n = number of moles of the gas

T = temperature

R = gas constant = 0.0821 L-atm/mol-K

In this case we have:-

n(total) = 15 + 5 = 20 moles

P = 1.01 atm and T = 300K

V = nRT/P = 20 moles * 0.0821 L-atm/mol-K * 300 K/1.01 atm = 487.7 L

Ans: Volume of the balloon is around 488 L


3 0
3 years ago
(6 points) Calculate the maximum number of moles and grams of H2S that can form when 158 g of aluminum sulfide reacts with 131 g
Schach [20]

Answer:107.1 g, 124.1 g

Explanation:

The equation of the reaction is;

Al2S3(s) + 6H20(l) ----> 2Al(OH)3(s) + 3H2S(g)

Hence;

For Al2S3

Number of moles= reacting mass/molar mass

Number of moles = 158g/150gmol-1 =1.05 moles

If 1 mole of Al2S3 yields 3 moles of H2S

1.05 moles of Al2S will yield

1.05 × 3/1 = 3.15 moles

Mass of H2S = 3.15moles × 34 gmol-1 = 107.1 g

For water

Number of moles of water = 131g/18gmol-1= 7.3 moles

6 moles of water yields 3 moles of H2S

7.3 moles of water will yield 7.3 × 3/6 = 3.65 moles of H2S

3.65 moles × 34 gmol-1 =124.1 g

5 0
3 years ago
Please help, I'll give 5 stars and brainliest!
Bezzdna [24]
Huh. Is this supposed to be biology?
8 0
2 years ago
Read 2 more answers
Other questions:
  • Is the capacity to do work or to produce heat.
    7·1 answer
  • An isotope of yttrium has 39 protons and 59 neutrons. what is the atomic mass of that isotope?
    15·1 answer
  • The half-reactions in a nickel-cadmium (nicad) battery are:
    7·1 answer
  • What process requires water to gain heat energy from the environment
    12·1 answer
  • How many grams contained on 78.4 moles of neon
    13·2 answers
  • What does it mean if something is insoluble?
    8·1 answer
  • PLEASE HELP ME!
    6·1 answer
  • What does a molecule of a substance that is made up if three elements look like​
    8·1 answer
  • A scientist is using robots to perform thousands of experiments on different
    6·1 answer
  • ¿Quién estableció el concepto moderno de elemento?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!