Answer:
Magma!
Explanation:
It's pretty interesting actually! The magma was poured out/ejected at Earth's surface.
`1. the products in a reactions will always have...
(a) the same total mass as the reactants
(b)the same number of molecules as the reactants
(c) less mass than the reactants
(d) a greater number of molecules than the reactants
Answer:
a
Explanation:
as the law of conservation of matter (mass) states: matter can not be created nor destroyed but can transform from a form to another.
since the conversion of mass to energy can not be done except in nuclear reactions via (E= mc2). normal chemical equations must be balanced to achieve the law.
Each carbon atom of benzene is involved in two ________
Answer:
Benzene is a combination of carbon and hydrogen atoms. The hybridization is sp2 type. During the hybridization of benzene, each carbon atom forms different bonds with two other similar carbon atoms instead of just one.
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What is the formula for trichlorine mononitride? *
Please help me it’s my birthday
Answer:
ur answer would be D.)
Explanation:
Hope this helps
also happy birthday
A good conductor:
A. transfers heat quickly
B. transfers heat slowly
C. does not transfer heat at all
D. always stays the same temperature
Answer:
A. Transfers heat quicklyGIVING 300 PTS URGENT AFTER ITS DONE If all the objects have around the same mass, which of the following objects has the most gravitational potential energy?
Question 4 options:
a chair set on the ground
a book on a high shelf on the first floor of a house
a ball stuck on the roof of a two-story house
a cat investigating a basement
Question 5 (1 point)
Which of the following electromagnets would have the greatest magnetic field?
Question 5 options:
A
B
C
D
Question 6 (1 point)
What is the role of a turbine in an electric generator?
Question 6 options:
It stores energy for later use.
It releases chemical energy.
It transfers electrical energy.
It provides mechanical energy.
Question 7 (1 point)
Which energy transformation takes place in a generator?
Question 7 options:
mechanical to electrical
chemical to radiant
electrical to mechanical
radiant to electrical
Question 8 (1 point)
The rumble feature on a video game controller is driven by a device that turns electrical energy into mechanical energy. This device is best referred to as _________?
Question 8 options:
an electric generator
an electromagnet
a solenoid
a motor
Answer:
5.a ball stuck on a roof
6.A
7.mechanical_electrical
8.A solenoid
I need a rlly quick answer help please
words that mean the same thing
decrease,
diminish,
dwindle
Answer:
Subside
Explanation:
Answer:
lower, reduce, decline
Explanation:
Which diagram shows how CH3Br and OH must collide in order to react and form CH2OH? (Marking brainliest!)
Answer:
Its B
Explanation:
I just took the quiz.
When [tex]CH_{3} Br[/tex] and OH collide in order to react and form [tex]CH_{3} OH[/tex] , such reaction will be best represented by diagram (B).
What is reaction?A chemical reaction would be a procedure that causes one group of chemical components to change chemically into another. In a chemical reaction, one or even more substances also known as reactants would be changed into one or more additional materials known as products. Chemical elements and chemical compounds make up substances.
What is collide?A colloid would be a mixture wherein the component made up of insoluble particles that are scattered at a microscopic scale is suspended within another component.
When
[tex]CH_{3} Br + OH[/tex] → [tex]CH_{3} OH + Br[/tex].
By the Collison of methyl bromide with OH ion then methyl alcohol will be formed.
Therefore, when [tex]CH_{3} Br[/tex] and OH collide in order to react and form [tex]CH_{3} OH[/tex] , such reaction will be best represented by diagram (B).
Therefore, the correct answer will be option (B).
To know more about Collison
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How does the air temperature at the bottom of a mountain compare with the air temperature at the top of the mountain?
A. The air is colder at the bottom.
B. The air is warmer at the top.
C. The air temperature at the top is lower.
D. The air temperature is the same.
Explanation: C) the air temp. at the top is lower
Softening of water is the application of
Answer:
Water softening is the process of removing the dissolved calcium and magnesium salts that cause hardness in water
Explanation:
Please help due tofay
Answer:
I only know the answer to the second one, The bond that occurs between two metal atoms is a metallic bond
In an extraction experiment similar to your expt. 4, you attempt to separate 2-naphthol from cyclohexane, both of which are dissolved in ether. You attempt the separation by extracting the organic layer with a Ì´5% NaOH (aq) solution (made by adding 5.00 g of NaOH to every 100 mL of water). Assuming that all of the base present in the aqueous solution reacts with the phenol during your extractions, what is the minimum volume of the aqueous NaOH solution needed to deprotonate 20.0 g of 2-naphthol in order to extract it into the water layer? Clearly show all calculations. After removal of the phenol from the ether layer, only cyclohexane would remain. Concisely explain how you could efficiently isolate relatively pure cyclohexane from the ether layer.
Answer:
[a]. 108 mL.
[b].
1. use HCL in washing for the neutralization of NaOH.
2. Wash with water.
3. make use of MgSO4 to remove water traces.
4. Evaporate to get the pure cyclohexane
Explanation:
The chemical equation for the reaction between 2-naphthol and Sodium hydroxide is given below as:
C₁₀H₈O + NaOH --------------------------------------------------> C10H7O⁻ Na⁺ + H₂O.
The C10H7O⁻ Na⁺ is the aqueous phase.
The molarity of Sodium Hydroxide is = [ (mass of sodium hydroxide ) ÷ molar mass sodium hydroxide × volume] × 1000.
The molarity of sodium hydroxide = [ (5/40) × 100] × 1000 = 1.25 M.
The number of moles of 2-naphthol = mass / molar mass = 20 / 144.17 = 0.138 moles.
Recall that, the formula for the number of moles = concentration × volume. Therefore, the volume of sodium hydroxide is given below as:
Volume of sodium hydroxide = the number of moles of sodium hydroxide ÷ concentration of sodium hydroxide = 0.138 ÷ 1.25 = 0.108L = 108 mL.
In order to efficiently isolate relatively pure cyclohexane from the ether layer, the following process must be followed:
1. use HCL in washing for the neutralization of NaOH.
2. Wash with water.
3. make use of MgSO4 to remove water traces.
4. Evaporate to get the pure cyclohexane
What is the concentration of a NaCl solution that is prepared by dissolving 14.61 g of NaCl in 500.0 mL of water
Answer:
0.029 g/mL or 0.5 M
Explanation:
The concentration in g/mL is:
14.61 g / 500.0 mL = 0.029 g/mLAs for calculating the molar concentration, first we convert 14.61 g of NaCl to moles, using its molar mass:
14.61 g ÷ 58.44 g/mol = 0.25 molThen we divide the number of moles by the volume in liters:
500 mL / 1000 = 0.5 LMolarity = 0.25 mol / 0.5 L = 0.5 M
What would be the formula of the precipitate that forms when lead (II) nitrate (aq) and potassium
sulfate (aq) are mixed?
O H₂O 0
O Pb2SO4
PbSO
ОРЫК,
O K(NO3)2
calculate the perimeter of a rectangle of length 8cm and breath 5/2cm
Answer:
21
Explanation:
P=2(l+w)=2·(8+2.5)=21
Hope this helps :)
According to an energy pyramid model, which trophic level is expected have the largest biomass in land ecosystems ?
Answer:
According to an energy pyramid model, Producer is expected have the largest biomass in land ecosystems
Explanation:
In a trophic level, the producers possess the largest biomass. With the increasing trophic level, the biomass reduces. Hence, the producers at the base have high biomass.
On terrestrial ecosystem, the producers are the plants and trees and hence the greatest biomass exists in the plants and trees.
Hence, in an energy pyramid model, Producer is expected have the largest biomass in land ecosystems
Which of the following is not a cause of water pollution?
A. Industrial waste
B. Agriculture
C. Raw sewage
D. Algae blooms
Answer:
A. Industrial waste
Explanation:
Why are polar molecules attracted to other polar molecules
Answer:
We know that polar molecules are attracted to each other by dipole-dipole attractions between the partial negative charge of one polar molecule and the partial positive charge on another polar molecule. Therefore, polar molecules like HCl are held together by both dipole-dipole attractions and London forces.
an object with a mass of 10.0 kg is moving at a speed of 5.00m/s. The kinetic energy of the mass is
a. 50.0j
b. 2.00j
c. 125j
d. 250j
The mass and velocity of an object determines its kinetic energy. The kinetic energy of the substance with mass of 10 kg and speed of 5 m/s is 125 J. Hence, option b is correct.
What is kinetic energy ?Kinetic energy of an object is generated by virtue of its motion. The kinetic energy is dependent to the mass and speed of the object by the expression written below;
Ke = 1/2 mv²
Therefore, as the mass or speed or both increases kinetic energy increases. When an object starts moving its potential energy gets converted to kinetic energy.
Given that mass = 10 Kg
speed = 5 m/s
then Ke = 1/2 10 kg × 5 m/s × 5 m/s = 125 J
Therefore, the kinetic energy of the object is 125 J, option c is correct.
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Select 2 that apply.
A synthesis reaction will be:
Answer:
where pic?
Explanation:
how many neurons does atom in the model shown below have
a.2
b.9
c.10
d.16
The barometer at an indoor pool reads 105.00 kPa. If the temperature in the room is 26c, what is the patial pressure of the "dry" air??
a. 30.88 kPa
b. 101.60 kPa
c. 108.40 kPa
d. 357.00 kPa
Answer:
Option B. 101.60 KPa
Explanation:
From the question given above, the following data were obtained:
Total pressure (Pₜ) = 105.00 KPa
Partial pressure of wet gas (Pᵥᵥ) at 26 °C = 3.4 KPa
Partial pressure of dry gas (Pₔ) =?
Total pressure = partial pressure of dry gas + partial pressure of wet gas
Pₜ = Pₔ + Pᵥᵥ
105 = Pₔ + 3.4
Collect like terms
105 – 3.4 = Pₔ
Pₔ = 101.60 KPa
Therefore, the partial pressure of the dry gas is 101.60 KPa
HELP!
Name an instinctive behavior and describe how it is beneficial to the survival of the young animal.
Answer:
Hunting
Explanation:
Things like hunting is instinct to animals and it's it beneficial to the survival of a young predator so it doesn't starve and die
Answer:HuntingExplanation:Things like hunting is instinct to animals and it's it beneficial to the survival of a young predator so it doesn't starve and die
Explanation:
How does the order of elements in the name relate to the order of elements in the
formula?
whats a particle of electormagnetic radiation
Answer:
Scientists have observed that electromagnetic radiation has a dual "personality." Besides acting like waves, it acts like a stream of particles (called "photons") that have no mass. The photons with the highest energy correspond to the shortest wavelengths.
Explanation:
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A hydrate of zinc chlorate, Zn(CIO3)2·XH20, contains 21.5% zinc by mass. Find the value of X.
Answer:
What I've done:
Molar mass of Zn: 65.409 g/mol
Molar mass of Cl: 2*35.453 =70.906 g/mol
Molar mass of O: 6*15.9994 =95.9964 g/mol
Total molar mass of Zn(ClO3)2: 232.3114 g/mol
21% of molar mass = 232.3114 g/mol
100% of mass = 1106.244762 g/mol
Molar mass of H2O: 18.01528 g/mol
232.3114 g/mol + 18.01528 g/mol = 250.32668 g/mol
250.32668 = 1106.244762
1106.244762 g/mol divided by 232.3114 g/mol
x = 4.419
Explanation:
% anything = (g/total mass)*100 = ?
Atomic mass Zn = 65.4 from your post.
molar mass Zn(ClO3)2 from your post = 232.3
molar mass H2O = 18
The 21.5% Zn is (note you used 21%) percent Zn in the hydrate so
%Zn = [(65.4)/(232.3 + x*18)]*100 = 21.5%
Solve for x and I obtained 3.99 which rounds to 4.00. Let me know if you don't understand any part.
I need help please....
Answer:
19. C 20. A 21. H 22. G 23. D 24. F 25. B 26. E
Explanation:
Just learnt it in science class
76.4 g of water H20 contain how many molecules?
2.55 × 10²⁴ molecules H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 76.4 g H₂O
[Solve] molecules H₂O
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 76.4 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})(\frac{6.022 \cdot 10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 2.55317 \cdot 10^{24} \ molecules \ H_2O[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2.55317 × 10²⁴ molecules H₂O ≈ 2.55 × 10²⁴ molecules H₂O
How does Barium obey the octet rule when reacting
to form compounds?
A. It gains electrons
B. It gives up electrons
C. It does not change its number of electrons
D. Oxygen does not obey the octet rule.
Answer:
it gives up electrons B. because the bond between the electrons is not very strong due to how few of them there are
Explanation: