Answer:
0.67
Explanation:
Molality is mols of solute over kilograms of solvent
there are 58/174 mols of solute, and 0.5 kg of solvent
(58/174)/0.5=0.6666...
Round to the nearest hundreth to get 0.67
Potential energy stored within chemical bonds is called:.
Answer:
Chemical Energy
Explanation:
Energy, Molecules and Chemical Reactions. Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.
found as plankton in both marine and
freshwater environments and have a
single simple eye on top of their heads
Answer:
Explanation:
Copepods. The single eye gave them the nickname of "cyclops"
Which of the following occurs when sodium and chlorine bond together to form sodium
A chlorine atom gains an electron from a sodium atom
A chlorine atom gains a proton from a sodium atom.
A chlorine atom donates a proton to a sodium atom.
A chlorine atom donates an electron to a sodium atom.
Write down the structural formula for the monomer from which
polyvinyl chloride is derived.
The monomer from which the very common commercial polymer poly vinyl chloride is vinyl chloride with the formula, CH₂Cl = CH₂Cl. The PVC is formed by addition polymerization.
What is polymerization ?Polymerization is the process of combination of smaller molecules or compounds in large number to form macromolecules or polymers. There are a lot of polymers that we are using daily in the form of bags, plastics, bottles etc.
Among the common polymers we use PVC or poly vinyl chloride is very essential commercial polymer. The monomer of PVC is vinyl chlorides.
The polymerization of n vinyl chloride to form polyvinyl chloride is given below.
[tex]\rm n CH_{2}Cl = CH_{2}Cl \rightarrow (-CH_{2}Cl - CH_{2}Cl -)__{n}[/tex]
The polymerization of vinyl chloride is taking place through addition mechanism. The vinyl chloride monomer repeatedly add one by one to form the polymer.
Find more on poly(vinyl)chloride:
https://brainly.com/question/28302230
#SPJ7
Calculate the volume occupied by 10 moles of hydrogen gas at 145K and 705 Torr.
2.05 L
14L
128 L
0.007 L
The volume occupied by 10 moles of hydrogen gas at 145K and 705 Torr is 128.01L.
How to calculate volume?The volume of a gas can be calculated using ideal gas law equation as follows:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureP = 705torr = 0.93atmV = ?T = 145Kn = 10R = 0.0821 Latm/molK0.93 × V = 10 × 0.0821 × 145
0.93V = 119.05
V = 128.01L
Therefore, the volume occupied by 10 moles of hydrogen gas at 145K and 705 Torr is 128.01L.
Learn more about volume at: https://brainly.com/question/13338592
A neutral atom of Sodium (Na) has 11 positive protons and 11 negative electrons. When sodium LOSES its outer electron, it becomes a Sodium Ion with a charge of +1. Why is its overall charge now +1?
the number of cobalt atoms in 4.23 moles of cobalt
Answer:
[tex]2.55 \times {10}^{24} [/tex]
atoms
How long is cooked steak good for in the refrigerator?.
Answer:
three to four days
Explanation:
Leftover steak is safe to eat after three to four days in the refrigerator—any longer and you could catch a foodborne illness from bacteria growth. Bacteria can also grow on perishable food that has been left out at room temperature for over two hours or kept at a temperature lower than 40°F.
Write a summary on how to use a light microscope
DUE TODAY PLEASE HELP.
Answer:
Step 1: Connect the light microscope to a power source. If your microscope uses a mirror instead of an illuminator, you can skip this step. Instead, find a place where natural light is easily accessible
Step 2: Turn the revolving nosepiece so the lowest objective lens is in position.
Step 3: Mount your specimen onto the stage. But before doing so, see to it that your specimen is adequately protected by placing a coverslip on top of it.
Step 4: Use the metal clips to keep your slide in place. Make sure the specimen is positioned in the center, right under the lowest objective lens.
Step 5: Look into the eyepiece and slowly rotate the coarse adjustment knob to bring your specimen to focus. See to it that the slide does not touch the lens.
Step 6: Adjust the condenser for the maximum amount of light. Since you're on the low power objective, you may have to decrease the illumination. Use the diaphragm under the stage to adjust.
Step 7: Now slowly rotate the fine adjustment knob until you obtain a clearer image of your specimen.
Step 8: Examine your specimen.
Step 9: After you're done viewing with the lowest power objective, switch to the medium power objective and re-adjust the focus with the fine adjustment knob.
Step 10: Proceed to the high power objective once you have it focused.
What is an ionic solid?
A. A crystalline solid held together by a shared electron pool
B. A crystalline solid held together by dipole-dipole forces
C. A crystalline olid held together by covalent bonds
D. A crystalline solid held together by charge attractions
Answer:
D
Explanation:
An ionic solid is a crystalline solid held together by charge attractionsAn example is a salt crystal (Na⁺ + Cl⁻ → NaCl)An ionic solid is a crystalline solid held together by charge attractions or an ionic bond.
What is an ionic bond?
Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.They are good conductors of heat and electricity. They have high melting points. These compounds are brittle.
Learn more about ionic bond,here:
https://brainly.com/question/11527546
#SPJ2
how many molecules of oxygen are contain in 100 ml of air at NTP? (air contains 21% oxygen by volume
Answer:
600
Explanation:
because if there's 6 molecules in each then 6×100 is 600
How many electrons must a sulfur atom gain to achieve an octet in its valence shell?.
Answer:
Answers Anonymous answered Sulfur has 6 valence electrons so it needs 2 more for an octet and it will then have a charge of negative 2
Explanation:
The element that doesn't occur in elemental state in nature is
Answer:
technetium, atomic number 43; promethium, number 61; astatine, number 85; francium, number 87; neptunium, number 93; and plutonium, number 94.
Explanation:
Describe the three possible decisions you can receive from an
editor when you submit a scientific article for publication. Which
decision is the least likely to occur?
a
Your answer should consist of 3-4 complete sentences with
correct grammar/spelling/punctuation.
Answer 2. Accept with minor revisions: Also known as conditional acceptance, this decision means that the paper requires minor changes for it to be ...
wer:
Explanation:
How many grams are in 2.3 moles of N?
Answer:
Therefore, 40.4 grams are contained in 2 moles of Neon.
How do you feel about GM food?
Answer: I think it's ok, but I have a neutral stance on it.
Explanation: Foods are genetically modified to preserve them and I've had my fair share of wasted money and bad expired food, so I'm a-ok on GM food.
Answer:
Well I think that we should use more for tride or give to our allies
Explanation:
_______ are similar to molecular formulas but show how atoms are bonded together.
Answer
The structural formula are similar to molecular formulas but show how atoms are bonded together.
Explanation:
The structural formula for a compound gives the same information as its molecular formula (the types and numbers of atoms in the molecule) but also shows how the atoms are connected in the molecule.
what could you and your classmates do to reduce human impact on land
giving brainiest
Answer:
have controlled population!
Explanation:
The exploration of the mid-cayman rise is intended to discover _______. a. what life may have been like before the evolution of photosynthesis b. the origins of photosynthesis c. life in shallow, coastal regions d. the chemical composition of undersea mountains
The exploration of the mid-cayman rise is intended to discover that what life may have been like before the evolution of photosynthesis.
What is mid - cayman rise?Mid - cayman rise is an area or era where only some amount of light is coming but still existence of life is present there.
As we know that plants make their own food by the process called photosynthesis in the presence of light, but this is not the scenario for all the time. Before the discovery of photosynthesis plants also prepared their own food.
Hence, option (a) is correct.
To know more about photosynthesis, visit the below link:
https://brainly.com/question/4341036
Answer:
A
Explanation:
Given the reaction below, which is the being oxidized? mg cl2 right arrow. mg2 2cl– 2ci– ci2 mg mg2
In the given decomposition reaction of MgCl₂, the oxidized species is magnesium.
What are oxidized species?Those species which goes through the oxidation process by the addition of oxygen or by the removal of hydrogen and electrons are known as oxidized species.
Given chemical reaction is:
MgCl₂ → Mg²⁺ + 2Cl⁻
In the above reaction oxidation of magnesium takes place as they losses electrons and reduction of chlorine takes place as they gain electrons.
Hence magnesium is the oxidized specie.
To know more about oxidation reaction, visit the below link:
https://brainly.com/question/25886015
Answer: B. Mg
Explanation:
E D G E
At constant temperature, a sample of helium at 760. Torr in a closed container was compressed from 5. 00 l to 3. 00 l. What was the new pressure exerted by the helium on its container?.
P₁V₁=P₂V₂
760.5=P₂.3
P₂=1266.6 torr
Question 76 (1 point)
The volume of a gas is 4.00 liters at 293 K and constant
pressure. For the volume of the gas to become 3.00 liters,
the Kelvin temperature must be equal to
Oь
3.00 x 293
4.00
4.00 x 293
3.00
3.00 x 4.00
293
293
3.00 x 4.00
Ос
Od
Answer:
Yeah yeah i don't know what you want anybody to do with this question because you don't have all of your answers.
Sodium + .... → Sodium sulfate + ....
Answer:
Sodium+ Sulphuric Acid--> Sodium Sulphate+ Water
How many hybrid orbitals form when three atomic orbitals of a central atom mix?.
Answer:
three _ _E _ _ _
Explanation:
Why would 60g at 10C of NaCl in 200g of water would be unsaturated?
Answer:
The amount of substance needed to saturate water increases as the temperature increases.
Explanation:
calculate the oxidation state of the underlined elements of K2 Cr2 O7
-----
Answer:
+4
Explanation:
In PbO2, oxygen exhibits an oxidation number of -2 (since it's not a peroxide or superoxide):
Let the oxidation number of Pb be x. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.
⇒ x + (−2) + (−2) = 0
x = +4
So the oxidation no. of Pb is +4.
I hope this helps.
Consider the following balanced equation:
2KCIO3 → 2KCl + 302
How many grams of O2 will be obtained by decomposing
98.1 grams of KClO3?
Оа
38.4 grams
b
17.1 grams
Ос
25.6 grams
76.8 grams
Answer:
A. 38.4 [gr].
Explanation:
all the details are provided in the attachment, the answer is marked with orange colour.
I dont understand. Please help me.
Answer:
B
Explanation:
it's has more water and will go active way faster
Answer:
Beaker b
Explanation:
This is because the temperature in beaker b is higher. Hot water has more kinetic energy. Therefore, it's particles move faster and collide more frequently with the particles of antacid tablet. So, the reaction occurs faster.
Hope this helps =)
Where are the reproductive organs contained?
Answer:
In my sense your answer must be Pelvic cavity.
1. Describe what the following terms mean
Temperature -
Heat -
Exothermic -
Endothermic -