Answers
Answer:
By just counting sigma bond and lone pair in central atom , one can easily find hybridization.
CO2 sp
SO2 sp2
NH3 sp3
BCl3 sp2
Related Questions
Sodium easily combines with chorine is reactivity
Answers
answer
yes
Explanation:
What is the volume of a 16.24 g sample of magnesium in cubic centimeters? Show a numerical setup and result for credit.
Answers
Answer:
9.34 cm³
Explanation:
From the question given, we obtained the following data:
Mass of magnesium = 16.24 g
Volume of magnesium =.?
To obtain the volume of the magnesium sample, we simply apply the formula for calculating the density of samples. This is illustrated below:
Mass of magnesium = 16.24 g
Density of magnesium 1.738 g/cm³
Volume of magnesium =.?
Density = mass /volume
1.738 = 16.24/volume
Cross multiply
1.738 × volume = 16.24
Divide both side by 1.738
Volume of magnesium = 16.24/1.738
Volume of magnesium = 9.34 cm³
Therefore, the density of the magnesium sample is 9.34 cm³.
1 teaspoon is Benefiber is added to 1 1/2 cups of water. Which of the following correctly describes what is formed?
O A. The chemical reaction between water and Benefiber allows one substance to dissolve in the other.
B. Water and Benefiber combine to form a precipitate.
o C. Benefiber is the solute in the solution that is formed.
D. Water is the solution in the solvent that is formed.
Answers
Explanation:
(A) Manganese salts give a grey borax bead test in reducing flame.
(B) From a mixed precipitate of AgCl and AgI, ammonia solution dissolves only AgCl due to the formation of [Ag(NH
3
)
2
]Cl.
(C) Ferric ions give a prussian blue precipitate on adding potassium ferrocyanide solution (D). On boiling the solution having K
+
, Ca
2+
, and HCO
3
−
ions, we does not get a precipitate of K
2
Ca(CO
3
)
2
Grade 8 SCIENCE BASELINE - 2020-2021 Question: 1-39
To bring heavy boxes down a fight of stairs. Tyrone uses a camp. He shoes the boxes down the ramp. The movement transforms ce type d energy into the fons made togos
the way that most of the energy is transformed?
potential energy into chemical energy and mechanical energy
o potential energy into light energy and mechanical energy
o potential energy into sound and chemical energy
O potential energy into heat and kinetic energy
Answers
Answer:
This question is unclear, the comprehensive question is:
To bring heavy boxes down a flight of stairs, Tyrone uses a ramp. He slides the boxes down the ramp. The movement transforms one type of energy into two other forms. Which of the following describes the way that most of the energy is transformed:
ANSWER:
Potential energy into heat and kinetic energy
Explanation:
According to this question, a ramp is used to bring heavy boxes down a flight of stairs. Tyrone does this by sliding the boxes down the ramp. The ramp is in a fixed position i.e. not moving, meaning the energy in the ramp is POTENTIAL ENERGY.
However, when the boxes slide down the ramp, the potential energy transforms to energy due to motion called KINETIC ENERGY, and HEAT ENERGY, which is caused by the friction between the boxes and the ramp.
Therefore, the potential energy of the ramp is transformed to kinetic energy in the boxes and heat energy.
Calculate the oxidation number of sulphur in H2SO4
Answers
Answer:
42
Explanation:
my brother said
The three main types of RNA are ____________________, _____________________, and ______________.
Answers
Answer:
There are three main types of RNA: messenger RNA, ribosomal RNA, and transfer RNA.
Explanation:
Messenger RNA (mRNA), Ribosomal RNA (rRNA), and Transfer RNA (tRNA).
This gas is found in the stratosphere where it helps protect us from UV radiation.
A) ozone.
B) oxygen.
C) nitrogen.
D) carbon dioxide.
Answers
Answer:
A.Ozone
Explanation:
what is the first step when scaling a graph?
Answers
Answer: the lll newton law
Explanation:
it jus is
help please i would really appreciate it thanks
Answers
As the atomic number on the Periodic Table increases, the number of electrons A. is unchanged B. alternates C. decreases D. increases
Answers
Answer:
D.
Explanation:
I looked it up and said increases, i'm taking a test today in chemistry and had the same question lol.
What is the volume of 3.0 grams of lead?
Answers
Answer:
it should be 0.01
Explanation:
How many atoms of each type occur in the formula unit of 2C6H12062
Answers
I BELIVE ITS 5 SORRY IF THATS WRONG BUT IM SURE
One particular snake, say a rattle snake or a cobra, doesn't always look the same. Describe three different ways a rattle snake or a cobra, or another snake of your choosing might appear depending on where it is and what it's doing. What makes the appearance of the snake different in each situation? How you would know in spite of the differences that it is a snake of a particular type?
Answers
Explanation:
Both cobras and rattlesnakes are dangerous snakes. Both snakes deliver fatal bites to humans. but their venoms are of different type.
Cobras are long slender snakes, they usua grow between 4 and 6 feet, although they are other species which grow up to 18 to 24 feet. a Cobra can be identified with its most common features 1.hood behind their heads.
While a rattle snakes gives a warning sign when approaching this sound is known as rattle.
Two students have been researching the atomic theory in preparation for their chemistry test. Melanie stated that Thomson's discovery revolutionized the understanding of an atom more than Rutherford. Josue disagreed with Melanie, he stated Rutherford's discovery revolutionized the understanding of an atom more than Thomson. Which student do you agree with?
Answers
Answer:
Josue
Explanation:
J.J Thompson proposed the plum pudding model of the atom. In his proposition, the atom is a sphere of positive charges into which negative charges were embedded. This model of the atom did not significantly contribute to our present day understanding of atomic structure.
On the other hand Ernest Rutherford laid out the foundation for a more accurate understanding of atomic structure in his nuclear model of the atom. According to Rutherford, the atom consists of a positively charged massive core called the nucleus around which electron move in orbits. His idea was akin to the solar system with the sun at it's core and planets moving around the sun in orbits.
This his idea of the nuclear theory was held as fundamentally correct by Neils Bohr's model of the atom. Hence, his nuclear theory of the atom was a significant milestone in our present day understanding of atomic structure.
I need help with this question ASAP
Answers
the answer is thermal.......
(1) In an experiment for determining the density of water, the following results
were recorded.
-mass of an empty beaker = 65gm.
- mass of the beaker and water = 165gm.
the volume of water = 100Cm.
(Calculate the density of water)
Answers
Given parameters:
mass of an empty beaker = 65gm
mass of the beaker and water = 165gm
volume of water = 100cm³
Unknown:
Density of water = ?
Solution:
Density is the mass per unit volume of a substance;
Density = [tex]\frac{mass}{volume}[/tex]
To find the mass of the water ;
Mass of water = Mass of beaker and water - mass of an empty beaker
= 165g - 65g
= 100g
So input parameters and solve;
Density = [tex]\frac{100g}{100cm^{3} }[/tex]
Density of the water in the beaker = 1g/cm³
indicate whether the statement is true or false the ripening of a banana is an example of a chemical change
Answers
Answer:
True. Ripening of a banana is a chemical change
What is generally true about the particles in a gas?
A. Gas particles are closer together and have stronger attraction between them than the particles in a solid.
B. Gas particles are closer together and able to conduct electricity better than the particles in a plasma.
C. Gas particles are farther apart and able to conduct electricity better than the particles in a liquid.
D. Gas particles are farther apart and have weaker attraction between them than the particles in a solid.
Answers
Answer:
D
Explanation:
PLEASE HELP
An engineer is designing a tire for heavy machinery, which statement
describes the clearest constraint that applies to the solution?
A. It must cost the consumer less than $200 per tire.
B. It must function safely under a heavy load.
C. It must be designed so that it has an appealing appearance.
D. It must be affordable for consumers.
Answers
Answer: it’s A
Explanation:
Answer:
It's A
Explanation:
Question 13 of 25
How has the work of chemists affected the environment over the years?
A. Chemists have both hurt the environment and helped the
environment by their actions.
B. Chemists have tried very hard not to impact the environment with
their work.
C. Chemists have ruined the environment through the misuse of
poisonous chemicals.
O D. Chemists have belan required to fix all environmental problems
that they have caused.
Answers
Answer: is A
Explanation:
how becuase i just take the test
Answer:
A
Explanation:
F 1.00 \(\rm mol\) of argon is placed in a 0.500-\(\rm L\) container at 21.0 \({\rm \, ^{\circ}C}\) , what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)? For argon, \(a = 1.345 \;\rm (L^2\cdot atm)/mol^2\) and \(b = 0.03219\; \rm L/mol\).
Answers
Answer:
2.05 atm
Explanation:
From ideal gas equation;
PV=nRT
Making P the subject of the formula;
P= nRT/V
Substituting values;
P= 1 × 0.0821 × 294/ 0.5
P= 48.27 atm
Real gas pressure;
(P + an^2/v^2) . (V - nb) = nRT
(P + 1.345 × 1^2/0.5^2) . (0.5 - 1 × 0.03219) = 1 × 0.0821 × 294
(P + 5.38) . (0.46781) = 24.1374
(P + 5.38) = 24.1374/0.46781
(P + 5.38) = 51.5966
P= 51.5966 - 5.38
P= 46.22 atm
Difference = Pideal - Preal
Difference = 48.27 - 46.22
Difference = 2.05 atm
is it possible to have a negative ion in a hydrogen atom in real life? Explain.
Answers
Answer:
Yes
Explanation:
Abstract. The negative ion of hydrogen continues to be important in atomic physics and astrophysics. Correlations between the two electrons are strong alieady in the ground state, the only bound state in this three-body system.
What does e=mc2 mean <3
Answers
Answer:
An equation derived by the twentieth-century physicist Albert Einstein, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.
"Given a block of frozen salt water, how could you separate
pure water from the salt using only a fire & stove? Please be
as specific as you can by mentioning PHASE CHANGES.
Answers
Answer: You could put the frozen block of ice on the stove and let it melt and eventually boil out leaving the salt behind
Explanation:
Which of the following statements is true about neutrons? *
a)They have a neutral charge and are found in an atom's nuclues
b)They have a negative charge and are found in an atom's nucleus
c)They have a positive charge and are found in the orbitals of an atom
d)They have a neutral charge and are found in the orbitals of an atom
Answers
Answer:
A
Explanation:
Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.
How much pressure is in the transition zone? Just need the answer.
Answers
☆<《 HOPE IT WILL HELP YOU 》>☆
Explanation:
The transition zoneis the part of Earth's mental. It is located between the lower mental and upper mental. It is between the depth of 410km TO 660km
1.C3H8 + O2 --> H2O + CO2
(5 Points)
Balanced
O Unbalanced
Answers
Answer:
Unbalanced
Explanation:
The balanced equation would be:
C3H8 + 5 O2 ---> 4 H2O + 3 CO2
Does the number of molecules change when a substance changes state?
Answers
Answer:
Molecules do't break up and reform when a substance boils and cools. Particles stay the same size and shape during state changes.
Explanation:
brainliest will be appreciated
(02.01 LC)
What is true of neutrons?
They have no charge and are located inside the nucleus.
They have no charge and are located outside the nucleus.
They are negatively charged and are located inside the nucleus.
They are negatively charged and are located outside the nucleus.
Answers
A combustion reaction occurs between one molecule of methane (CHa) and two molecules of oxygen (O2).
How many atoms of carbon, hydrogen, and oxygen make up the products for this combustion reaction?
O A) 1 carbon, 1 hydrogen, and 1 oxygen
O B) 1 carbon, 1 hydrogen, and 2 oxygen
O C) 1 carbon, 4 hydrogen, and 2 oxygen
OD) 1 carbon, 4 hydrogen, and 4 oxygen
Answers
The total number of atoms make up the products :
D) 1 carbon, 4 hydrogen, and 4 oxygen
Further explanationComplete combustion of Hydrocarbons with Oxygen will produce CO₂ and H₂O compounds.
If O₂ is insufficient there will be incomplete combustion produced by CO and H and O
Hydrocarbon combustion reactions (especially alkanes)
For combustion of methane (CH₄) and two molecules of oxygen (O₂).
[tex]\tt CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
The number of atoms make up the products
CO₂ : 1 carbon, 2 oxygen
2H₂O : 4 hydrogen , 2 oxygen
The total number of atoms make up the products :
D) 1 carbon, 4 hydrogen, and 4 oxygen
Combustion Reaction:Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat.
Combustion of Hydrocarbons with Oxygen will produce CO₂ and H₂O compounds.
If O₂ is insufficient there will be incomplete combustion produced by CO and H and OFor combustion of methane (CH₄) and two molecules of oxygen (O₂).The number of atoms make up the products:CO₂ : 1 carbon, 2 oxygen
2H₂O : 4 hydrogen , 2 oxygen
Thus, the correct option is D.
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