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
ZanzabumX [31]
3 years ago
12

I dont have the materials for this lab, can anyone help me out?

Chemistry
1 answer:
Alex Ar [27]3 years ago
4 0

I am not sure about this question sry but u can try asking a tutor u don't need to use any points

You might be interested in
Explain how storm surges can affect human life in Florida.
Blizzard [7]
As a result of high winds and water from a storm surge, homes, businesses, and crops may be destroyed or damaged, public infrastructure may also be compromised, and people may suffer injuries or loss of life.
5 0
3 years ago
HELP ASAP
Lelu [443]

3, 1, 5, 4, 3, spontaneous

7 0
3 years ago
One radioactive isotope of calcium has an atomic mass of 47. How many protons are in this calcium-47 nucleus? A) 17 B) 20 C) 27
Vikki [24]

The correct number of protons 20. If it is calcium, it has to be 20 protons. 27 is the number of neutrons.

7 0
3 years ago
Read 2 more answers
6.023*10^26 molecules of hydrogen gas into mass in gram<br>​
balandron [24]

Answer:

Avogadro’s Number

Avogadro’s NumberIt certainly is easy to count bananas or to count elephants (as long as you stay out of their way). However, you would be counting grains of sugar from your sugar canister for a long, long time. Atoms and molecules are extremely small – far, far smaller than grains of sugar. Counting atoms or molecules is not only unwise, it is absolutely impossible. One drop of water contains about 10 22 molecules of water. If you counted 10 molecules every second for 50 years without stopping you would have counted only 1.6 × 10 10 molecules. Put another way, at that counting rate, it would take you over 30 trillion years to count the water molecules in one tiny drop.

Avogadro’s NumberIt certainly is easy to count bananas or to count elephants (as long as you stay out of their way). However, you would be counting grains of sugar from your sugar canister for a long, long time. Atoms and molecules are extremely small – far, far smaller than grains of sugar. Counting atoms or molecules is not only unwise, it is absolutely impossible. One drop of water contains about 10 22 molecules of water. If you counted 10 molecules every second for 50 years without stopping you would have counted only 1.6 × 10 10 molecules. Put another way, at that counting rate, it would take you over 30 trillion years to count the water molecules in one tiny drop.Chemists needed a name that can stand for a very large number of items. Amedeo Avogadro (1776 – 1856), an Italian scientist, provided just such a number. He is responsible for the counting unit of measure called the mole. A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number. There are therefore 6.02 × 10 23 water molecules in a mole of water molecules. There also would be 6.02 × 10 23 bananas in a mole of bananas, if such a huge number of bananas ever existed

3 0
3 years ago
Read 2 more answers
if a lead can be extrated with 92.5% efficiency,what is the mass of ore required to make a lead sphere with 750%cm radius
Lady_Fox [76]
The mass of ore required is 21 700 t.

r = 750 cm

V = \frac{4}{3}  \pi  r^{3} = \frac{4}{3}  \pi  (750 cm)^{3} = 1.767 × 10⁹ cm³

The density of lead is 11.34 g/cm³.

So mass of lead sphere = 1.767 × 10⁹ cm³ × \frac{11.34 g}{1 cm^{3} } = 2.004 ×10¹⁰ g

2.004 ×10¹⁰ g × \frac{1 kg}{1000 g} = 2.004 × 10⁷ kg

2.004 × 10⁷ kg × \frac{1 t}{1000 kg} = 2.004 × 10⁴ t

92.5% efficiency means 92.5 t Pb per 100 t of ore.

Mass of ore = 2.004 × 10⁴ t Pb ×\frac{100 tore}{92.5 t Pb} = 2.17 × 10⁴ t ore = 21 700 t ore

6 0
3 years ago
Other questions:
  • As the owner of a small restaurant, you purchase 5 boxes of napkins for $75.00 every 3 months. Each box contains 525 napkins. Wh
    5·1 answer
  • Draw the orbital diagram for the valence shell of each of the following atoms:
    12·1 answer
  • 1. Write a balanced chemical equation for each of the following reactions. Remember that gases of elements such as oxygen are di
    8·1 answer
  • Calculate the molality of a solution formed by dissolving 34.8 g of lii in 500.0 ml of water. calculate the molality of a soluti
    15·2 answers
  • A solution of ammonium carbonate is mixed with a solution of magnesium nitrate. If magnesium carbonate is insoluble in water, wh
    11·1 answer
  • Explain what causes air pressure:
    6·2 answers
  • What element is an atom that has 7 protons 8 neutrons and 6 electrons?
    10·2 answers
  • yo pls help All organisms have a barrier that separates their internal environment from the outside world. Which of the followin
    6·2 answers
  • Can someone please help me with this ASAP??
    5·2 answers
  • Which change will increase the energy of particles
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!