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
irinina [24]
3 years ago
13

According to the article, HOW has the discovery of

Chemistry
1 answer:
Irina-Kira [14]3 years ago
8 0

Answer:a

Explanation:

i think so cs i read the ariticle

You might be interested in
__ Cu + ___ HNO₃ → ___ _Cu(NO₃)₂ + ___ NO₂ + ___ H₂O
ivolga24 [154]

Answer:

Cu + 4HNO3 --->   Cu(NO3)2 + 2NO2 + 2H2O.

Explanation:

Balancing:

Cu + 4HNO3 --->   Cu(NO3)2 + 2 NO2 + 2H2O.

3 0
3 years ago
Read 2 more answers
If a sample of sodium chloride with a mass of
alex41 [277]
Original molarity was 1.7 moles of NaCl

Final molarity was 0.36 moles of NaCl

Given Information:

Original (concentrated) solution: 25 g NaCl in a 250 mL solution, solve for molarity

Final (diluted) solution: More water is added to make the new total volume 1.2 liters, solve for the new molarity

1. Solve for the molarity of the original (concentrated) solution.

Molarity (M) = moles of solute (mol) / liters of solution (L)

Convert the given information to the appropriate units before plugging in and solving for molarity.

Molarity (M) = 0.43 mol NaCl solute / 0.250 L solution = 1.7 M NaCl (original solution)

2. Solve for the molarity of the final (diluted) solution.

Remember that the amount of solute remains constant in a dilution problem; it is just the total volume of the solution that changes due to the addition of solvent.

Molarity (M) = 0.43 mol NaCl solute / 1.2 L solution

Molarity (M) of the final solution = 0.36 M NaCl

I hope this helped:))
6 0
3 years ago
How does the mass of an electron compare to the mass of a proton and a
tensa zangetsu [6.8K]

Answer:

C. The mass of an electron is much less than the mass of a proton or

a neutron.

Explanation:

When we compare the mass of an electron to that of proton or neutron, the mass of an electron is much less than the mass of a proton or a neutron.

Electrons are negatively charged particles in an atom

Protons are positively charged particles

Neutrons do not carry any charges.

  • The relative mass of an electron compared to that of a proton is \frac{1}{1840}
  • This is a very small value
  • Electrons generally have mass of 9.11 x 10⁻³¹kg
  • Protons weigh 1.67 x 10⁻²⁷kg
  • Neutrons weigh  1.68 x 10⁻²⁷kg

We can see that electrons have very small mass and this is why when calculating the mass of an atom, we use the sum of the number of protons and neutrons.

6 0
3 years ago
I will give 25 points and make them brainlest if they solve this.
sdas [7]

Answer:

B

Explanation:

7 0
3 years ago
Read 2 more answers
A scientist was studying a population of elephants. The first year, he counted a population of 80. Over the next eight
Mars2501 [29]

Answer:

The carrying capacity of this population would be 125 we know this because we see that this number occur multiple times and seems to be the tipping point after which the number of the population always go down

6 0
2 years ago
Other questions:
  • How much heat is required to decompose 25.5 grams of NaHCO3? 2NaHCO3(s) + 129 kJ 2Na2CO3(s) + H2O(
    9·1 answer
  • Calculate the molarity of the two solutions.
    15·1 answer
  • Two friends are arguing about the structure of the universe. Caleb says that the universe is made of many galaxies that are made
    11·1 answer
  • Calculate the mass in grams of each sample.
    15·1 answer
  • If 420 joules of heat energy is added to 25 grams of water at 25 degrees celcius, what will be the final temperature of the wate
    13·1 answer
  • These four ELEMENTS were found in early earth and they make up all living things.
    9·2 answers
  • Calculate the molarity of the following solution: 0.50 moles of MgCl2 in 150 milliliters of solution.
    6·1 answer
  • When an object transfers energy to another object, does it always transfer all of it’s energy?
    7·2 answers
  • A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur.
    14·1 answer
  • E is solution of HCI of unk concentration f contain 4.8g of NaOH in 25cm point of salution​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!