Answer: The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy. In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2). Energy will be released in the process.
Explanation:
What is the name and formula of the compound formed between lithium and sulfite?
Select one:
a)Lithium sulfide, Li(SO3)2
b)Lithium sulfide, Li2SO3
c)Lithium sulfite, Li(SO3)2
d)Lithium sulfite, Li2SO3
Answer:
d)Lithium sulfite, Li2SO3
Explanation:
LITHIUM is an element in the group 1 (alkali metals) of the periodic table, with a charge of +1. On the other hand, SULFITE is a radical with the chemical formula (SO3²-). It is made up of sulfur and oxygen atoms.
According to this question, lithium element and sulfite radical combines to form a compound called LITHIUM SULFITE. From the chemical formula of these individual constituents, the chemical formula of the compound formed will go this: Li2SO3. This means that it takes 2 atoms of Li+ to combine with SO3²- in order to form a neutral compound.
!!NEED URGENT SCIENCE HELP!! Please help me with this I am so lost. I will mark you brainliest and like ur answer and rate it 5 stars. ease just help me out. :)
Answer:
1. D 2. C 3. B
Explanation:
1. The product is always what is being yielded from the equation, or what is created. Since both 4H2O and 3CO2 are created from the reactants, they are both products of the reaction.
2. The Law of Conservation of Matter states that matter cannot be created, nor destroyed. Therefore, C is not true because new atoms cannot be created in a reaction.
3. The second formula is balanced, but the first is not
Melting point of a substance is what kind of property?
O extensive
O intensive
O chemical
O commercial
Answer:
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. Therefore the answer is chemical.
Explanation:
Brainliest?
Describe the relationship between the nucleus and energy levels of an atom.
How many molecules are in one mole of H2SO4
Answer:
I think it is 20
Explanation:
Answer: 20, Hope this helped!
Explanation:
When you throw a rock, you are ________ energy.
A. creating
B. destroying
C. storing
D. transferring
Answer:
I think a tell me if I am wrong
2. How many joules are
required to change the temperature of 120 ml of
water by 5 °C?
Energy required : 2508 J
Further explanationGiven
V= 120 ml
Δt = 5°C
Required
Heat needed
Solution
Heat can be formulated :
Q = m.c.Δt
m = mass, g
c = specific heat, joules / g °C (water=4.18 J.g °C)
∆T = temperature difference, ° C / K
mass water = 120 g(density = 1 g/ml)
Input the value :
Q = 120 g x 4.18 J.g °C x 5 °C
Q = 2508 J
19) Which set of coefficients correctly balances this chemical equation?*
_Ag +_N2 → _Ag3N
1,1,2
3.1.2
6,1,2
O 6, 3,2
Answer:
6,1,2
Explanation:
_Ag + _N2 => _Ag3N
LHS RHS
Ag=1×6=3 Ag=3×2=6(Balanced)
N=2×1=2 N=1×2=2(Balanced)
coefficient=6,1,2
Pure water and pure salt are poor conductors of electricity. When salt is dissolved in water, the resulting solution conducts electricity well. Which statement explains why this occurs with these substances?(1 point)
The process of dissolving makes the electrons in their atoms free to move.
The process of dissolving makes the atoms in them free to move.
The process of dissolving makes the electrons in their atoms more closely bound.
The process of dissolving makes the atoms in them more closely bound to each other.
Answer:
Atoms are less compact when they dissolve, it can’t be C and D
Explanation:
I’m not giving you the answers
When salt is dissolved in water, the process of dissolving makes the electrons in their atoms free to move.
We know that water is a covalent molecule hence its dissociation does not yield a significant conductivity. Also, solid ionic substances are poor conductors of electricity.
When salt is dissolved in water, the process of dissolving makes the electrons in their atoms free to move.
Learn more about conductivity of solution: https://brainly.com/question/18521474
The speed of a wave on a rope is 50cm/s an its wave
length is 10cm. What is its frequency
Answer:
Speed = frequency x wavelength 50 cm/s = Freq x 10cm
Explanation:
Please help!!!
c6h12o6 → atp (energy) + co2 + alcohol is an example of what type of reaction?
Answer:
The above reaction is an example of alcoholic fermentation.
Explanation:
In alcoholic fermentation, one mole of glucose gets converted into two moles of alcohol, two moles of carbon dioxide and two moles of adenosine tri-phosphate (ATP).
I’ll give brainlist:)
Explain your choice of time units. Include what you think is a
reasonable estimate of the age of Earth.
What is 6.9 x 10' written in standard form?
O 0.00000069
O 0.000069
O 6,900,000
O 69,000,000
Answer:
the correct anwser is D
Explanation:
What is the answer?? I need help
Answer:
covalent
Explanation:
flourine and sulfur are both nonmetals/anions, therefore it is covalent.
Help me answer these questions
Answer:
10, True
Explanation:
Because weather is what conditions of the atmosphere are over a short period of time and climate is how the atmosphere behaves over a long period of time.
Answer:
8. Equator
9.
a. thermometer
b. manometer
c.hygrometer
d.Anemometers
10. True
Explanation:
why do numbers have to be added to the
reactants?
Answer:
The reacting materials (reactants) are given on the left, and the products are displayed on the right, usually separated by an arrow showing the direction of the reaction. ... Reactions are balanced by adding coefficients so that there are the same number of atoms of each element on both sides of the reaction.
Explanation:
Which type of absolute dating method would be best for a rock layer believed to be millions of years old?
answers:
A. Carbon-14
B. Potassium-Argon
C. Chlorine dating
D. Isotope 51
Answer:
D. Isotope 51
IF U ANSWER THIS ILL BRAINLIST U N GIVE U 5 STAR. just answer the ones u know if ur a science genius or whateva. ahah ty.
1) what is the electron configuration of oxygen?
a) 2, 6
b) 2, 8, 8
c) 2, 8, 5
d) 2, 2, 2, 2
2) an atom contains 6 protons, u neutrons and 6 electrons. it's atomic number is?
a) 6
b) 7
c) 19
d) 13
3) which of the following statements about atoms is false?
a) an atom is mostly empty space.
b) neutrons and protons are found in the nucleus with the electrons.
c) the number of neutrons found in the nucleus of an atom is always the same.
d) electrons circle the neucleus all the time.
Answer:
a) 2, 6
a) 6
b) neutrons and protons are found in the nucleus with the electrons.
Explanation:
1.
Electronic configuration entails the arrangement of electrons within an atom. Therefore, to do this, we must know the number of electrons in the element given.
since we have been given oxygen atom, the number of electrons therein is 8.
So;
the electronic configuration is 2,6
2.
The atomic number of an atom is the same as the number of protons that it contains. The proton number is the number of positively charged particles in the atom of the element.
Since we have been given that the number of protons within the atom is 6, therefore, the atomic number is 6.
3.
It is false that the nucleus of an atom contains protons, neutrons and electrons. Electrons are not found in the nucleus of any atom. Only the process of electron capture during radioactivity can make this happen.
Electrons are found orbiting the atomic space in discrete energy levels.
Help for Honor chem homework
Answer:
$160.80
$40.20 for 12 beakers = $3.35 for 1 beaker
48 beakers = $160.80
please help me :( i have no idea what i’m doing
What does Transform boundaries mean?
Answer/Explanation
Transform boundaries are places where plates slide sideways past each other. Many transform boundaries are found on the sea floor, where they connect segments of diverging mid-ocean ridges. California's San Andreas fault is a transform boundary.
Answer:
Transform boundaries means that the Earth’s tectonic plates slide past each other horizontally along transform or strike-slip faults. The 2 transform boundaries are divergent and convergent.
Divergent plate boundary: when the plates are moving far away from each other.....← →
Convergent plate boundary: when the plates start to collide with each other......→ ←
Hope this helped!
Have a supercalifragilisticexpialidocious day!
the pull of gravity of ______ (choices: the moon only, the sun only, the moon and sun) causes Earth’s crust and oceans to bulge. This creates high and low tides.
_____ (choices: Spring, Neap, Seasonal) tides occur when the Sun, the moon, and Earth are nearly aligned. ____ (choices: spring, neap, seasonal) tides happen when the Sun and the moon are at right angles to each other. Each of these special tides happens ____ (choices: once, twice, four times) in a lunar cycle.
Answer: the moon and sun
Explanation:
Por qué el atomismo de balton se le considera un teoría científica mientras que a leucipio y Demócrito no?
Answer:
Because Democritus or Liucipius cannot demonstrate or proof their ideas as they did not have any equipment or any research to prove the existence of atoms.
Explanation:
John Dalton, Democritus and Leucipius are some of the greatest scientist and scholars of the past.
Democritus originally proposed or gave the idea of the of the composition of the matter of indivisible and tiny particles. John Dalton is credited for the beginning of the modern atomic theory.
Democritus believed that a matter is made up of atoms that can move about empty spaces. They are small, indestructible, solid, indivisible and of different shapes and sizes. Democritus proposed his idea at that time as there were no scientific advancement or instruments to prove his ideas about atoms.
Later on when science and scientific processes were advanced, Dalton was able to prove and proceed on the atomic model theory.
Democritus cannot prove his ideas as there were no instruments or advance scientific processes and so people felt his ideas as illogical. His proposals were based on his ideas.
PLEASE ANSWER ASAP 30 POINTS
Which characteristics belong to angiosperms? Select four options.
vascular tissue
roots
fruits
cones
flowers
Answer:
It's Actually Vascular Tissue , Roots, Fruits, and Flowers
Explanation:
UR WELCOME:)
How many grams of present in 2.1x1026 atoms of cesium?
Answer:
46000 g Cs
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 TableStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
2.1 × 10²⁶ atoms Cs
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of Cs - 132.91 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 2.1 \cdot 10^{26} \ atoms \ Cs(\frac{1 \ mol \ Cs}{6.022 \cdot 10^{23} \ atoms \ Cs})(\frac{132.91 \ g \ Cs}{1 \ mol \ Cs})[/tex]Divide/Multiply: [tex]\displaystyle 46348.6 \ g \ Cs[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
46348.6 g Cs ≈ 46000 g Cs
11. Which of the following is a characteristic of all chemical changes? *
3 points
O A different state of matter is produced,
Some mass is converted to energy
Some form of light is given off.
O A new material is formed.
Answer:
Explanation:
A new Material is formed.
Basically, Chemical changes differ from Physical changes because in chemical changes, Substances have the ability to become a different substance.
Example:
Water to ice is a physical change because it is still water despite being a solid from liquid.
A Magnesium strip placed in CuSO4 solution made the Mg strip turn into a new substance which is MgSO4. this is a Chemical change because Mg has now become a different substance called MgSO4.
A 10.00 kg block of iron is heated from 10.0 ° C to 95.0 °C. The specific heat of iron is 0.45 kJ/(kg·°C). How much energy is given to the iron?
a. 1900 kJ
b. 4300 kJ
c. 3800 kJ
d. 2100 kJ
Answer:
Q = 382.5 Kj
Explanation:
Given data:
Mass of block = 10.00 Kg
Initial temperature = 10.0°C
Final temperature = 95.0°C
Specific heat capacity of iron = 0.45 KJ/Kg.°C
Energy given = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 95.0°C - 10.0°C
ΔT = 85.0°C
Q = 10.00 Kg×0.45 KJ/Kg.°C×85.0°C
Q = 382.5 Kj
Question 1 (True/False Worth 2 points) (02.02 MC) Burning wood represents a chemical change True or False
Answer:
True
Explanation:
Because burning is a chemical reaction. Morever chemical change can not be reverse wood becomes ashes and smoke after burning and wood can not be again formed by ashes and smoke.
is anyone willing to help me make my science notes?
Answer:
I have nice handwriting what are they on?
Explanation:
Which describes the amplitude of a wave when it carries more energy?
It is higher.
O It is lower.
O It is darker.
O It is lighter.
Answer:
It is higher.
Explanation:
The amplitude of a wave that carries more energy is usually higher.
The energy carried by a wave is related to the amplitude in such a manner that it is proportional to the square amplitude.
Amplitude is the maximum vertical displacement of a wave moving along its path.
Energy of wave and its amplitude are directly proportional to one another.If the energy of wave is doubled, the amplitude is quadrupled. So, the higher the energy of a wave, the more its amplitude.Answer:
The answer is A: It is higher.
Explanation:
When the amplitude of a wave is increased, the energy also increases. Also, as anticipated, if the amplitude is decreased, then the energy in the wave will decrease.
