Answer:
Explanation:
Ethanoyl chloride reacts instantly with cold ethanol. There is a very exothermic reaction in which a steamy acidic gas is given off (hydrogen chloride). Ethyl ethanoate (an ester) is formed.
Select all the correct answers.
Based on the enthalpy changes given for the reactions, which reactions are endothermic?
Answer:
The reaction for which ΔH is positive are endothermic reactions. Explanation: The energy changes occur during the bonds formation and bonds breaking
I need help please （o´・ェ・｀o）
Tantalum: 2
Niobium: 3
Dubnium: 1
Please make brainliest ?
a glass of water with a mass of 0.35 kg rests on the edge of a desk 0.85 m above the floor given that the acceleration due to gravity is 9.8 m / s² what is the elastic potential energy
Answer:
2.92
Explanation:
just took the test
Etiquetas de productos de casa formula química, nombre de la formula, y el nombre del producto. Ejemplo NaCL, Cloruro de sodio, sal.
Answer:
Azucar, bicarbonato de sodio, lavandina, vinagre, amoniaco.
Explanation:
Podemos numerar estos compuestos
Azucar → Sacarosa → C₁₂H₂₂O₁₁
Lavandina → Hipoclorito de sodio → NaClO
Vinagre → Ácido acético → CH₃COOH
Bicarbonato de sodio → NaHCO₃
Amoníaco → NH₃
What is the charge of this atom?
65 protons
60 electrons
A)-5
B)+5
C)0
Answer:
B. +5
Explanation:
Convert 2.5 x 102km to mm.
Convert 188 dL to L
Question 1: A blocked-off meander eventually becomes
A)an oxbow lake.
B)part of the stream again
C) alluvial fan
D)rejuvenated.
Question 2: As the velocity of a stream decreases, which transported particle size would settle to the stream’s bottom first?
A) slit
B) clay
C)pebble
D) sand
This is a science question.
What is the acceleration of this helicopter?
Answer:
7m/s
Explanation:
Is the acceleration of the helicopter
Methanol, propan-1-ol and ethanol has boiling point of 65 degree celsius, 97 degree celsuis, 87 degree celsuis respectively. A student uses fractional distillation to separate a mixture of these compound. State which liquid will be collected in the second fraction and explain why
Answer:
ethanol
Explanation:
Methanol has a boiling point of 65°C, propan-1-ol has a boiling point of 97°C and ethanol has a boiling point of 87°C
Fractional distillation is used for separating miscible liquids through the use of the different vapor pressure properties of the liquids. As the mixture is heated up, components start to vaporize according to their boiling points. The component with the least boiling point vaporizes first while the component with the highest boiling point vaporizes last.
This means that methanol would vaporize at the first fraction because it has the lowest boiling point followed by ethanol at the second fraction and then propan-1-ol at the last fraction.
Describe how sodium (Na) and chlorine (Cl) interact to form an ionic compound. Specifically, what is happening to an electron?
Scientists use patterns in the periodic table to what?
Explain the importance of valence electrons in chemical bonding.
Answer:
Explanation: Understanding valence electrons is key to understanding chemical bonding. Delocalized valence electrons produce metallic bonds (bonds between atoms of metals) which give metals unique properties such as conductivity and ductility (draw metal into wires)
Write the chemical formula for gold (I) sulfide.
Answer
Au2s
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How long does it take for new fossil fuels to be created?
A.millions of years
B.billions of years
C. thousands of years
D. hundreds of years
Answer:
millions of years sometimes even hundred of millions of years
Answer:
How long does it take for new fossil fuels to be created?
Explanation: so it takes 65 million years to creat new fossil fuels so i think it may be A.millions of years i am sorry if i am wrong but i do beleave i am right
Which of the following is not a controllable risk factor?
a. smoking
b. inactivity
c. aging
d. over eating
Answer:
C) Aging
Explanation:
You can't stop that or change the rate that you age at. its inevetable :D
A sealed plastic bottle of apple juice is placed in freezer. Which statement describes what is happening while the juice is changing form a liquid to a solid?
A.) Kinetic energy is increasing. B.) Particle motion is coming to a complete stop.
C.) Particle speed is staying the same.
D.) Temperature is decreasing steadily.
Your answer is B Particle motion is coming to a complete stop.That's your answer!
Hope this helps!!!
Answer:
B
Explanation:
i have the same test
I will mark brainliest!
Which particle has a high rate of deposition?
A. a low-density particle
B. a small particle falling off a cliff
C. a particle with jagged, rough ends
D. a large round particle settling on a surface
Answer:
C ! :)
Explanation:
Answer:
The correct answer is A
Explanation:
LOW-DENSITY PARRTICLE
Will give extra points and brainliest if you go in the comments and answer a few other questions
Answer:
5,293 km, A
Explanation:
B has no coma.
C is too overly touchy
Answer:
b
Explanation:
When the dry ingredients of a cake are combined, what is the result? A.Element B.Mixture C.Compound D.Atom
A combination of dry ingredients of a cake results in a mixture.
A mixture is a combination of substances that are only physically but not chemically combined.
Mixtures are different from elements, compounds, and atoms because:
elements are pure substances consisting of a single type of atomcompounds are a mixture of different elements that are chemically combinedatoms are the smallest particle of an element.More on mixtures can be found here: https://brainly.com/question/24898889?referrer=searchResults
Answer:
Its mixture
Explanation:
Pls give me brainly ...
Question 6 (1 point)
Sound, earthquakes, and waves in water are rechanical waves because they require
a physical to transport energy. (Lesson 4.02)
O electromagnetic field
O disturbance
O medium
location
Answer: The answer is MEDUIM
Explanation:
Identify the type of reaction depicted below:
2SO2(g)
+
O2(g) --> 2SO3(g)
Answer:
Combination reaction
Explanation:
In Chemistry, elements and compounds are involved in a process called chemical reactions, which are of different types namely: combination, decomposition, double replacement, combustion etc. A combination reaction is that reaction in which two or more substances called the REACTANTS combine together to form a single new substance called the PRODUCT.
In this case, a reaction is depicted as follows:
2SO2(g) + O2(g) --> 2SO3(g)
In this reaction, compound SO2 combines chemically with element O2 to form a single new compound SO3. Hence, this is a type of COMBINATION REACTION.
Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases
Answer:
a. Reactants: F₂ and HCl molecules
Products: Cl₂ and HF
b. 4HCl + 2F₂ ----> 4HF + 2Cl₂
c. Single replacement reaction
Note: The question is not complete. The complete question is found below as well as in the attachment.
Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases:
a. write a formula for each of the reactants
b. write a balanced equation for the reaction
c. indicate the type of reaction as combination,decomposition, single replacement, double replacement, or combustion
Explanation:
a. From the models shown in the diagram, The reactants are F₂, HCl while the products are Cl₂ and HF respectively
b. Equation for the reaction is given below;
4HCl + 2F₂ ----> 4HF + 2Cl₂
c. The reaction is single replacement reaction such that fluorine gas molecules replace the chlorine atoms in hydrogen chloride to form hydrogen fluoride with the liberation of chlorine atoms as gaseous molecules.
A year has 365 days, and a day has 24 hours. If an hour has 60 minutes and a minute has 60 seconds, how many seconds are there in 1 year?
54,750 s
525,600 s
3.15 Times. 107 s
1.89 Times. 109 s
Answer:
31,536,000 seconds
Explanation:
off google
Answer:
3.15 x 10^7s
Explanation:
How do tectonic plates move at convergent subduction boundaries? Insert a drawing with the arrows that show the movement
Answer:
If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. ... As the sinking plate moves deeper into the mantle, fluids are released from the rock causing the overlying mantle to partially melt.
A student builds an electrical circuit. In the circuit, a
battery is connected to a siren.
Which series of energy transformations takes place in the circuit when the
siren turns on?
A. Chemical energy - Sound energy - Electrical energy
O B. Electrical energy - Chemical energy - Sound energy
C. Chemical energy - Electrical energy - Sound energy
O D. Sound energy - Electrical energy - Chemical energy
Answer:
C. Chemical energy - Electrical energy - Sound energy
Explanation:
According to the law of conservation of energy, energy can be transformed i.e changed from one form to another. According to this question, a student builds an electrical circuit, which connects a battery to a siren. Based on this description, the electrical circuit uses ELECTRICAL ENERGY supplied by the CHEMICAL ENERGY in the battery cell.
The electrical energy in the circuit connects the CHEMICAL ENERGY in the battery to the siren, which makes the sound using SOUND ENERGY. In other words, the CHEMICAL ENERGY of the battery powers the ELECTRICAL ENERGY of the circuit to make SOUND ENERGY in the siren. Hence, the order of energy transformation is: Chemical energy - Electrical energy - Sound energy
Answer:
C. Chemical energy - Electrical energy - Sound energy
Explanation: I took the test:)
What is the measurement from the line of origin to the crest?
A. Trough
B. Amplitude
C. Crest
D. Wavelength
Glycerol has a density of 1.26g/mL. What is the mass of 3000.mL of glycerol?
Which of the following is a subsurface event that takes place during the rock cycle?
Group of answer choices
Cementing
Erosion
Melting
Weathering
Answer:
Melting
Explanation:
Could not have been erosion because erosion happens on the surface.
Could not have been weathering because weathering happens on the surface.
So we only have Cementing and Melting left....
The answer is melting, I got 100% on my test.
Hope this helps!!!! :D
Please give brainliest!!!
Answer:
D
Explanation:
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
find the molar mass of this
Explanation:
Given problem:
Find the molar mass of:
SO₃ and C₁₀H₈
Solution:
The molar mass of a compound is the mass in grams of one mole of the substance.
To solve this, we are going to add the individual atomic masses of the elements in the compound;
Atomic mass;
S = 32g/mol; O = 16g/mol; C = 12g/mol and H = 1g/mol
For SO₃;
= 32 + 3(16)
= 32 + 48
= 80g/mol
For C₁₀H₈
= 10(12) + 8(1)
= 120 + 8
= 128g/mol
Would you expect manganese(II) oxide, MnO, to react more readily with HF(aq) or NaOH(aq)?
Answer:
NaOH(aq)
Explanation:
NaOH(aq) is known to precipitate Mn^2+ ions according to the following reaction; Mn^2+(aq)+2OH^−(aq)↽−−⇀Mn(OH)2(s)
Hence, manganese(II) oxide reacts more readily with NaOH(aq) under ordinary conditions precipitating the metal hydroxide solid. This is one of the characteristic reactions of Mn^2+.