1. How many molecules are in 2.40 moles of H2O?
Answer:
There arr 1.5*1024 molecules in 2.40 moles of H2O.
9. How many grams of zinc are needed to produce 12 grams of zinc chloride according to the following equation? Y-
Zn + Cl2 --> ZnCl2
12 grams of zinc
O 2.9 grams of zinc
O 11.6 grams of zinc
O 5.8 grams of zinc
Given :
A balanced chemical equation :
[tex]Zn +Cl_2->ZnCl_2[/tex]
To Find :
How many grams of zinc are needed to produce 12 grams of zinc chloride.
Solution :
Moles of [tex]ZnCl_2[/tex] ,
[tex]n=\dfrac{Given \ wt}{Molecular\ Mass}\\\\n =\dfrac{12}{136.30}\ mol\\\\n=0.088\ mol[/tex]
Now, by balanced chemical equation we can say that 1 mol of Zn produce
1 mol of [tex]ZnCl_2[/tex] .
So, 0.088 mol of Zn is required to produced 0.088 mol of [tex]ZnCl_2[/tex] .
[tex]Mass \ required = molecular \ mass \times moles\\\\m = 65.38 \times 0.088\\\\m=5.8 \ gm[/tex]
Therefore, 5.8 grams of zinc is required.
Hence, this is the required solution.
what is the answer for this
what sense does your body have
Answer:
Which in
Explanation:
Which of the following is true about matter?
Answer:
Full question plssssss what should we find
How many sig figs are in:
0.0058096
I need help, pls someone help me!!
What is the difference between a continuous spectrum with an emission line spectrum?
Answer: A Continuous spectrum is a spectrum that has all wavelengths with no gaps over a wide range. An Emission spectrum is when an electron in an excited state moves to a lower energy level, it emits a certain amount of energy as photons.
I found this information off of a site called “socratic.org.” I hope i could help!
A 20 N net force acts on an object with a mass of 2.0 kg. What is the object's acceleration? (PLS HELP lol)
Explanation:
Force = Mass × Acceleration
20 = 2.0 × A
A = 20/2 = 10m/s^2
Why carbon dioxide can be tested with the help of moist blue litmus paper ?
Answer:
carbon dioxide is acidic and when it comes in contact with blue litmus paper it turns red
Explanation:
A student walks 8 km in 30 minutes. What is the student’s average speed in km/h?
Answer:
16 km per hour
Explanation:
I hope this helped.
(01.04 MC)
Describe two distinct ways in which the skin could help cool the body on a hot day. (5 points
All elements on the periodic table of elements are
First 30
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminum
Silicon
Phosphorus
Sulfur
Chlorine
Argon
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
75
Answer:
The rest after that first 30.
Explanation:
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
Rubidium
Strontium
Yttrium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
Cesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Polonium
Astatine
Radon
Francium
Radium
Actinium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Lawrencium
Rutherfordium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium
Roentgenium
Copernicium
Nihonium
Flerovium
Moscovium
Livermorium
Tennessine
Oganesson
What is the density of 19 milliliters of a liquid substance with a mass of 6.05 grams?
Answer:
The answer is
0.32 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} [/tex]From the question
mass = 6.05 g
volume = 19 mL
The density of the substance is
[tex]density = \frac{6.05}{19} \\ = 0.3184210526...[/tex]
We have the final answer as
0.32 g/mLHope this helps you
True or False? Nitrogen can get back into the atmosphere when dead plants and animals are decomposed by bacteria. The bacteria break down the larger molecules into smaller ones including nitrates, ammonia, and ultimately N2. True or Fralse
Answer: True
Explanation:
Answer:
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In what circumstance would the complete and net ionic equations for a reaction be identical?
Answer: Complete ionic equations dissociate all aqueous solutions into ions. Net ionic equations show the change that occurs in chemical reactions and do not show spectator ions that are the same in reactants and products. (b) If no spectator ions were present then complete and net ionic equations would be identical.
Explanation:
Question 3
A milkman adds a very small amount of baking soda to fresh milk.
(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
Answer:
Curd is acidic in nature, because an acidic substance has less value of pH. A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline? Answer: By making the milk more alkaline, it takes more time to turn into curd.
calculate the mass of 3.011×10^24 molecules of water...................... plzz i need it asap plzz help me plzz
Answer:
90.10 g
Explanation:
Step 1: Given data
Number of molecules of water: 3.011 × 10²⁴ molecules
Step 2: Calculate the moles corresponding to 3.011 × 10²⁴ molecules of water
We will use Avogadro's number: there are 6.022 × 10²³ molecules of water in 1 mole of molecules of water.
3.011 × 10²⁴ molecules × (1 mol/6.022 × 10²³ molecules) = 5.000 mol
Step 3: Calculate the mass corresponding to 5.000 moles of water
The molar mass of water is 18.02 g/mol.
5.000 mol × 18.02 g/mol = 90.10 g
Using microorganisms to break down pollutants into nontoxic organic matter is called? a. bioremediation b. phytoremediation c. biconcentration d.bioaccumulation
Answer:
bioremediation
Explanation:
Which term describes a mixture that is not uniform throughout?
1. chemically bonded
2. heterogeneous
3. homogeneous
4. solution
If a gas has a mass of 468 grams and its density is 17 grams per liter, how much volume does it occupy?
Answer:
The answer is
27.53 LitresExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{Density} [/tex]
From the question
mass = 468 g
Density = 17 g/L
Substitute the values into the above formula and solve
We have
[tex]volume = \frac{468}{17} \\ = 27.529411[/tex]
We have the final answer as
27.53 LHope this helps you
Does modern industrial agriculture have a sustainable future?
Answer:
No. The aim of modern agriculture is to make a profit and be a continuing business not be sustainable to the planet. GMOs, pesticides, herbicides, monoculture, tillage, antibiotics
Explanation:
Given 1 cm3 = 1 mL
A box has dimensions 2.0 cm x 4.0 cm x 8.0 cm.
Answer: 64
Explanation:
you just multiple the 3 numbers to get the answer (i’m in chemistry and just did this question lol)
why is it important to conduct scientific tests more than one time
Answer:
you man get different results
Jessica poured a liquid into the graduated cylinder below. What is the volume of the liquid?
Answer:
Answer is B
Explanation:
define radioactivity and write down properties of radioactive Ray's
Answer:
Explanation:
So basically is just explain what radioacitvity and then radidoactive
Radioactivity is the spontaneous release of energy from an unstable atom to get to a more stable state. Ionizing Radiation is the energy that comes out of a radioactive atom. Radioactive isotopes are radioactive atoms of the same element that have different numbers of neutrons.
Answer:
Radioactivity is the spontaneous release of energy from an unstable atom to get to a more stable state. Ionizing Radiation is the energy that comes out of a radioactive atom. Radioactive isotopes are radioactive atoms of the same element that have different numbers of neutrons.
❤❤❤❤❤❤
Explanation:
How do you determine the charge of an isotope?
Answer:
If the protons in the atom outnumber the electrons, the isotope has more positive charges than negative charges but If the number of electrons exceeds the number of protons, the ion charge will be negative.
Explanation:
The charge of an isotope is defined by how many more protons there are than electrons.
Or the other way around.
For example if there are 4 protons and 2 electrons, the ion charge is +2 because there are more protons.
If there are 4 electrons and 2 protons, the ion charge is -2 because there are more electrons.
How does the control group differ from the experimental group? Choose all the correct options.
A The control group contains more than one experimental variable
B
The control group is used as a standard to compare results to, but the experimental group is not
c The experimental group is used as a standard to compare results to, but the control group is not
D The control group is not tested or measured
E The control group does not contain the experimental variable, but the experimental group does.
F The control group does contain the experimental variable, but the experimental group does not
Answer:
B,D,E
Explanation:
Can someone help me with science
Answer:
yess...
follow me and mark me brainliest
Answer:
Yess
Explanation:
Ask your question please.
how many bonds are broken during in CH4
Using the periodic table, complete the table to describe each atom. Type in your answers
A
B
C
D
E
F
Answer:
A. 20 B.40 C. Ca D. 10 E. 9 F. F
Explanation:
Answer:
A.) 20
B.) 40
C.) Ca
D.) 10
E.) 9
F.) F
Explanation:
just did it on edge 2020 & got it correct....