Answer:
D. Reactants.
Explanation:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
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:
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:)
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
What is the charge of this atom?
65 protons
60 electrons
A)-5
B)+5
C)0
Answer:
B. +5
Explanation:
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
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)
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
Fill in the blanks: ______ compounds break up into ______ and ______ in solution, which can move freely and carry an _______ current.
I hate virtual school
Describe how sodium (Na) and chlorine (Cl) interact to form an ionic compound. Specifically, what is happening to an electron?
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:
methanol on reaction with acetyl chloride gives
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.
This is a science question.
What is the acceleration of this helicopter?
Answer:
7m/s
Explanation:
Is the acceleration of the helicopter
What effect does the spinning of the earth's core have?
A.it creates gravity
B. it creates matter
C. it creates mass
D. it creates the earths magnetic field.
Answer:
c
Explanation:
its c
Earth contains a spinning electric filed. The spinning of earth core creates its magnetic field. Thus, option D is correct.
What is a spinning body?A body which rotates in its own axis is called a spinning body. Earth rotates about its along with revolving around sun. The outer core of earth generates electric current. This is called telluric current.
Flow of this current creates an electric current which is parallels to the surface of earth. The direction of magnetic field lines will be perpendicular to the direction of current. But it comes stronger when parallel to current.
A rotating electric current results in the generation of a magnetic field. Thus spinning of earth core generates a magnetic field and therefore, option D is correct.
To learn more about magnetic field, refer the link below:
https://brainly.com/question/11514007
#SPJ2
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.
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.
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+.
Predict what would happen if a positive charge is placed between the two charges and allowed to move. Explain.
Answer: The same effect happens when you put two electrons near each other (or two protons). We know that if you have a single positively charged particle, a positively .
Explanation: i hope that helped. have a good day.
I need help please （o´・ェ・｀o）
Tantalum: 2
Niobium: 3
Dubnium: 1
Please make brainliest ?
Convert 2.5 x 102km to mm.
Convert 188 dL to L
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 measurement from the line of origin to the crest?
A. Trough
B. Amplitude
C. Crest
D. Wavelength
Which type of bond is salt? a. covalent b. valence c. metallic d. ionic
Answer:
D. Ionic
Explanation:
It has ionic bonding! Good luck ^^
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
Write the chemical formula for gold (I) sulfide.
Answer
Au2s
please mark me as brainlist
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.
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 ...
Scientists use patterns in the periodic table to what?
Plsss helpppp
im confused
will mark BRAINLIEST
Answer:
I searched the answer up on Brainly so its not my credit.
Explanation:
The answers D.
"If you have learned that metal + nonmetal ⟶ ionic bond, the answer is D, because N and C are the only pair of nonmetals.
However, if you have learned that a bond is ionic if the electronegativity difference (ΔEN) between the two atoms is greater than 0.7, the answer is A, B, and D.
The Li-Cl bond is definitely ionic.
For Na and C, ΔEN =1.62, so the Na-C bond is a highly polar covalent bond.
For Mg and C, ΔEN = 1.24, so the Mg-C bond is a polar covalent."
Hope this helps :D
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
Are ionic compounds not carrying a charge?
Answer:
yes they carry charges