HELP ME PLEASE I NEED THE ANDEER NOW
How many atoms are there in 0.655 moles of C6H14?
Answer: 3.94 x 10^23 molecules
Explanation: hope this helps!
An earthquake that measures 5 on the Richter scale is how much greater in magnitude than an earthquake that measures 4?
5 times
50 times
2 times
10 times
Answer:
10 times
Explanation:
I need help plz ill give u Brainliest plzz i need help...Two students are discussing gravity. One student says that there is a gravitational attraction between the two
of them. The other student thinks this cannot be true, because he cannot feel any gravitational attraction to
the other student. Which student is correct, and why?.
Answer:
the first.
Explanation:
Newton's law of universal gravitation, in part, states that every particle attracts every other particle in the universe.
what are the products of the reaction with their coefficients C2H18+O2?
Answer:
2C2H18 + 13O2 → 4CO2 + 18H2O (I balanced your equation)
Products - CO2 & H20
Protons, Neutrons, and Electrons Practice Worksheet
Calculating the number of each particle in autor
Proton Atomic Number
Electrons Protons
Neutrons Atomic Mass - Atomic Number OR Big Small
0
Oxygen
15.000
Use the periodic table to find the numbers of protons, neurons, and electrons for some of the following
, ,
elements
Name of Element
Element
Symbol
Артіс
Numb
Proton
Neutron
electrons
Electrons
Number
B
11
5
5
6
5
Boron
Sadiun
24
11
Y
20
Copper
29
35
TC
43
PE
207
Thallium
204
81
Н.
0
Carbon
12
N
2
56
Calcium
SI
14
Argon
10
MO
12
Answer:
Sorry I am not good at chemistry
Explanation:
The characteristics of the atoms and the periodic table allow to find the result for the number of protons, neutrons and electrons, the results in the table
The periodic table is a graphic representation where the chemical elements are placed by their atomic number, this table is organized in row and columns, where the elements of the same column have similar properties.
The period table indicates the atomic number, which is the number of protons, and the atomic mass, which is the sum of the protons plus the neutrons.
The atoms are neutral entities therefore the number of electrons must be equal to the number of protons.
It is asked to calculate the number of electrons, protons and neutrons of various chemical elements
Element Sodium, symbol Na
Atomic number (Z) 11
Atomic weights (M) 24
The number of protons is equal to the atomic number
protons 11 protons
The number of neutrons is
# neutrons = M - Z
# neutrons = 24 -11
# neutrons = 13 neutrons
The number of electrons is equal to the atomic number
# electrons = 11
Element Yttrium, symbol Y
Atomic Number 39
Atomic mass 89
Protons 39
Neutrons = 89-39 = 50
Electrons 39
Element Copper, Symbol Cu
Atomic number 29
Atomic mass 64
protons 29
Neutrons = 64-29 = 35
Electrons 29
Element Technesium, Symbol Tc
Atomic number 43
Atomic mass 98
protons 43
neutrons = 98 -43 = 55
electrons 43
Element Lead, Symbol Pb
Atomic Number 82
atomic mass 207
protons 82
neutrons = 207 -82 = 125
electrons 82
Element Thalium, Symbol Ta
Atomic Number 81
atomic mass 204
protons 81
neutrons = 204 -81 = 123
electrons 81
Element Hydrogen, Symbol H
Atomic number 1
Atomic mass 1
protons 1
neutrons 0
electrons 1
Element Carbon, Symbol C
Atomic number 6
Atomic mass 12
Protons 6
neutrons = 12-6 = 6
electrons 6
Element Nitrogen, Symbol N
Atomic number 7
Atomic mass 14
protons 7
neutrons = 14-7 = 7
electrons 7
Element Barium, Symbol Ba
atomic number 56
atomic mass 137
protons 56
neutrons = 137-56 = 81
electrons 56
with these results we complete the following table
Element Symbol Protons Neutrons Electrons
Sodium Na 11 13 11
Yttrium Y 39 50 39
Copper Cu 29 35 29
Tecnetium Te 43 55 43
Lead Pb 82 125 82
Thallium Ta 81 123 81
Hydrogen H 1 0 1
Carbon C 6 6 6
Nitrogen N 7 7 7
Barium Ba 56 81 56
In conclusion using the characteristics of the atoms and the periodic table we can find the result for the number of protons, neutrons and electrons, the results in the table
Learn more here: https://brainly.com/question/11155928
which property below will be the best one to use to most accurately identify a pure substance because it is unique to each pure substance?
hardness
brittleness
odor
density
24. When the equation
Al + O2
A1,03
is properly balanced, which of the following terms appears?
(a) 2 A1
(c) 3 A1
(b) 2 Al2O
(d) 2 02
Answer:
Explanation:
3
Explanation:
The reaction expression is given as:
Al(OH)₃ + HNO₃ → H₂O + Al(NO₃)₃
To solve this problem, let us assign coefficient a,b,c and d to each specie;
aAl(OH)₃ + bHNO₃ → cH₂O + dAl(NO₃)₃
Conserving Al : a = d
O: 3a + 3b = c + 9d
H: 3a + b = 2c
N: b = 3d
let a = 1 , d = 1, b = 3 , c = 3
Multiply through by 3;
a = 1, b = 3, c = 3 and d = 1
Al(OH)₃ + 3HNO₃ → 3H₂O + Al(NO₃)₃
how many grams of sodium bromide would be produced from the complete reaction of 41.3 AgBr ?
Answer:
22.6
Explanation:
I know answer is correct, I got the exact same question :)
6. The combustion of a sample of butane, C.H. (lighter fluid), produced 2.46 grams of
water. Using the balanced equation below, calculate the mass (grams) of carbon
dioxide produced.
2 C.H. + 13 0, -------> 8 CO, +10 H2O.
please help me find the carbon dioxide :)
Hey,
QUESTION)1) We balance the equation of the reaction, that to say :
2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O
2) Calculating the molar mass of simple butane :
M(C₄H₁₀) = 4M(C) + 10M(H)
M(C₄H₁₀) = 4 x 12,0 + 10,0 M(C₄H₁₀) = 58,0 g/mol3) Let us calculate the quantity of material corresponding to the mass of simple butane :
n(C₄H₁₀) = m/M
n(C₄H₁₀) = 2.46/58,0 n(C₄H₁₀) = 4,24 x 10⁻² mol4) Determining the progress maximal x of the reaction,
xmax = n(C₄H₁₀)/2
xmax = 4,24 x 10⁻²/2 xmax = 2,12 x 10⁻² mol5) If the reagents are supplied in a stoichiometric quantity, and the combustion is complete, then :
n(CO₂) = xmax x 8
n(CO₂) = 2,12 x 10⁻² x 8 n(CO₂) = 17,0 x 10⁻² molm(CO₂) = M(CO₂) x n(CO₂)
m(CO₂) = (12 + 2 x 16) x 17,0 x 10⁻² m(CO₂) = 7,48 g The mass of carbon dioxide is therefore 7.48 g.The Kₐ of carbonic acid is 4.3 x10⁻⁷ . H₂CO₃ ⇄ H⁺ + HCO₃ ⁻ This means that H₂CO₃ is a
A) Good hydrogen-ion acceptor.
B) Poor hydrogen-ion acceptor.
C) Good hydrogen-ion donor.
D) Poor hydrogen-ion donor.
Answer:
A good hydrogen ion acceptor
Can somebody give me some backup for this question?
Complete the Replication and Transcription of the following DNA Sequence:
GGAGTTACAGTTAGTA
Replication (DNA to DNA):
Transcription (DNA to RNA):
Answer:
CCUCAAUGUCAAUCAU or you could try CCTCAACGTCAATCAT i could be wrong so sorry im not the best
Answer:
Replicated DNA: CCT-CAA-TGT-CAA-TCA-T
Transcription sequence (mRNA): CCU-CAA-UGU-CAA-UCA-U
Explanation:
SOMEONE SMART HELP PLS!!
8. What is the [H+] of a solution with a pH of 4.78
Answer:
7.01 is the answer of the [H+] of a solution with a pH of 4.78
553.5 mL ?:cm^3
how do i get my answer? and what is the answer?
Answer:
553.5 cm3
Reason:
1 mL = 1 cm3
someone please ASAP
the options are
1. BF.
2.B4
3.B2F2
3.BF3
Answer:
B4
Explanation:
good day
what is a chemial property og hydragion peroxide
Answer:
Hydrogen peroxide is a colorless liquid at room temperature with a bitter taste. Small amounts of gaseous hydrogen peroxide occur naturally in the air. Hydrogen peroxide is unstable, decomposing readily to oxygen and water with release of heat.
Explanation:
mark brainliest
How can you tell if atoms of two different elements will form polar covalent or nonpolar covalent bonds??
How do you count the number of atoms in a chemical formula?
Answer:
To find out the number of atoms: MULTIPLY all the SUBSCRIPTS in the molecule by the COEFFICIENT
Explanation:
Step 1: Write the chemical formula
Step 2: List all the atoms
Step 3: Count the number of atoms of each element in 1 molecule.
Step 4: Multiply the number of atoms of each by the coefficient.
Step 5: Make sure your answer makes sense.
How many moles are in 45.5 g of P2O5 ?
Answer:
0.327214 mol
Explanation:
45.5/278.106=0.163607
Then, 0.163607x2= 0.327214
Where does Earth's Internal Energy Come From? *
Answer:
There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.
Answer:
Internal sources of energy mean they are coming from within the earth
Explanation:
What is homeostasis?
Answer:
the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Explanation:
Thermal energy would naturally flow between objects at which temperatures?
O A. from 5°C to -5°C
OB. from 15°C to 15°C
OC. from 35°C to 45°C
OD. from -15°C to 15°C
Answer:
i think the answer is letter C. From 35°c to 45°c
Explanation:
sorry if it is wrong
how can you tell how reactive an element is?
How many moles are in 85.62 g of K,C03?
Is it true or false?
Answer:
false
Explanation:
because i know it
Matching
Match each definition with the correct term.
Definitions
_____ 1. device for measuring temperature
_____ 2. total kinetic energy of particles of matter
_____ 3. amount of energy needed to raise the temperature of 1 gram of a substance by 1 °C
_____ 4. average kinetic energy of particles of matter
_____ 5. scale for measuring temperature
From the CK-12 Physical Science For Middle School Workbook
_____ 6. transfer of thermal energy between objects with different temperatures
_____ 7. measure that affects the thermal energy of matter but not its temperature
Terms
thermal energy
heat
temperature
thermometer
mass
Celsius
specific heat
Answer:
1. thermometer
2. thermal energy
3. specific heat
4. temperature
5. Celsius
6. heat
7. mass
Identify the acid, base, conjugate acid, and conjugate base in the following reaction:
HCLO2 + H2O = H3O^+ + ClO2^-
In the reaction as follows: HCLO2 + H2O = H3O+ + ClO2-
HClO2 is the acid because it loses a protonH2O is the base because it accepts a protonH3O+ is the conjugate acidClO2- is the conjugate baseCONJUGATE ACID AND BASE:
According to Brønsted–Lowry, an acid is a substance that can donate a proton (H+). A conjugate base is formed when an acid loses a proton. The resulting ion is called conjugate base. A base is a substance that accepts a proton or hydrogen ion (H+). A conjugate acid is formed when the base accepts a proton. The resulting ion is called a conjugate acid.In the following reaction: HClO2 + H2O = H3O+ + ClO2-
HClO2 is the acid because it loses a protonH2O is the base because it accepts a protonH3O+ is the conjugate acidClO2- is the conjugate baseLearn more at: https://brainly.com/question/12883745?referrer=searchResults
What mass of iron is needed to react with sulfur in order to produce 96 grams of
iron (III) sulfide according to the following equation?
Answer:
51.69 g of Fe
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2Fe + 3S —> Fe₂S₃
Next, we shall determine the mass of Fe that reacted and the mass of Fe₂S₃ produced from the balanced equation. This can be obtained as follow:
Molar mass of Fe = 56 g/mol
Mass of Fe from the balanced equation = 2 × 56 = 112 g
Molar mass of Fe₂S₃ = (2×56) + (3×32)
= 112 + 96
= 208 g/mol
Mass of Fe₂S₃ from the balanced equation = 1 × 208 = 208 g
SUMMARY:
From the balanced equation above,
112 g of Fe reacted to produce 208 g of Fe₂S₃.
Finally, we shall determine the mass of Fe needed to produce 96 g of Fe₂S₃. This can be obtained as follow:
From the balanced equation above,
112 g of Fe reacted to produce 208 g of Fe₂S₃.
Therefore, Xg of Fe will react to produce 96 g of Fe₂S₃ i.e
Xg of Fe = (112 × 96)/208
Xg of Fe = 51.69 g
Thus, 51.69 g of Fe is needed for the reaction.