Answer:
There are four σ bonds and no lone pairs around phosphorous atom in the lewis structure of H3PO4 molecule. Therefore total number of VSPER pairs are four. Therefore, shape of molecule around phosphorous atom is tetrahedral.
Explanation:
There are four σ bonds and no lone pairs around phosphorous atom in the lewis structure of H3PO4 molecule. Therefore total number of VSPER pairs are four. Therefore, shape of molecule around phosphorous atom is tetrahedral.
therefore total number of vsper pairs of four. Therefore, shape of molecule around phosphorous atom is tetrahedral.
What I need help fast!
if you could choose from having fire or ice powers, what would you choose?
Answer: I would choose ice
Ice is the solid state of water, a normally liquid substance that freezes to the slid state at temperatures of 0 °C (32 °F) or lower and expands to the gaseous state at temperatures of 100 °C (212 °F) or higer
Answer:
fire
Explanation:
just my opinion but.
If you have fire you could melt things and it defeats ice and ice is easily melted.
Fire is good in a "battle" too lol.
Oops...
How can glass be a liquid if it's so hard?
Answer:
because yes
Explanation:
Answer:
When heated, glass can become a sort of liquid I guess :>
Explanation:
______elements that have a longer half-life are more _______ than those that have a shorter half-life.
Answer:
Radioactive elements
Stable
Explanation:
Radioactive elements that have a longer half-life are more stable than those that a shorter half-life.
Half-life is the time taken for half of a radioactive element to decay by half of its original composition.
Now, if a substance have a long half-life, it is more stable and takes time to break down. For atoms with a short life, they are highly unstable and breaks down readily and easily.
7. Which of the following changes could be associated with either a chemical change OR a
physical change?
a. The change cannot be reversed
b. Bending of metal
c. New substances formed
d. Change in color
Answer:
a: chemical change because the change cannot be reversed.
b: physical change because the action can be reversed.
c: chemical change.
d:chemical change.
any change that cannot be reversed is a chemical change and any change that can be reversed is a physical change.
Which statement describes effusion?
C D
It occurs when a gas passes through a tiny hole.
O It occurs when a liquid passes through a tiny hole.
O It occurs when gas molecules disperse throughout a container.
It occurs when a liquid disperses throughout a container.
Answer:
I think it's A because effusion is a gas escaping from a tiny hole
Explanation:
I just finished the test and got it right :)
Answer:
A on edge 2020
Explanation:
I took the test and got 100, hope this helps:)
Which of these products was made using a renewable resource?
O A. Paper plate
O B. Aluminum can
O C. Copper pan
O D. Plastic bag
Answer:
paper plate
Explanation:
A renuable source is a source that would replenish in ones lifetime. Trees make paper and grow in the span of a average human life.
Can someone please help me with this?-- 18 pts!
2C10H11NO4 + 2H2O → C16H10N2O2 + 2C2H4O2 + 4H2O
In this reaction, 1.87 g of indigo (C16H10N2O2) are produced.
If the theoretical yield is 2.35 g of C16H10N2O2, what is the percent yield of indigo?
Round to the nearest decimal.
The percent yield of indigo : 79.6%
Further explanationPercent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated
General formula:
Percent yield = (Actual yield / theoretical yield )x 100%
An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients
Reaction
2C₁₀H₁₁NO₄ + 2H₂O → C₁₆H₁₀N₂O₂ + 2C₂H₄O₂ + 4H₂O
Actual yield = 1.87 g
Theoretical yield = 2.35 g
The percent yield of indigo :
[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{1.87}{2.35}\times 100\%=\boxed{\bold{79.6\%}}[/tex]
What is the volume of a 25 g object with a density of 9.1 g/mL? please help me
Answer:
The answer is 2.75 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{25}{9.1} \\ = 2.747252...[/tex]
We have the final answer as
2.75 mLHope this helps you
7. The atomic number equals the number of blank or blank in a stable atom of an element.
Answer:
Atomic Number
Neutral atoms of an element contain an equal number of protons and electrons. The number of protons determines an element's atomic number (Z) and distinguishes one element from another.
Explanation:
What are the alkaline earth metals?
A. Group 2 elements
O B. Group 18 elements
C. The transition metals
D.
up 1 elements
which statement below best describes the movement of particles in a gas?
A- the particles vibrate in a fixed position
B-the particles slide easily past one another
C- the particles move freely and are well separated
D- the particles move freely with little free space between the particles.
Answer:
c the particles are spaced out and move freely
Explanation:
Answer:
C). The particles move freely and are well separated
Explanation:
Which statement describes a positive effect of selective breeding? A. Some desirable traits in a population can disappear. B. Offspring can be prone to genetic diseases. C. Parents can pass on useful traits to offspring, D. A population can end up with a lack of genetic diversity .
Answer:
C. Parents can pass on useful traits to offspring
Explanation:
Answer:
The Answer is C
Explanation:
A weather balloon is inflated to a volume of 2.2 x 103 L with 374 g of helium. What is the density of helium in grams per liter?
Answer:
The answer is 0.17 g/LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{374}{2.2 \times {10}^{3} } = \frac{17}{100} \\ [/tex]
We have the final answer as
0.17 g/LHope this helps you
Chemistry, please help
Answer:
Name ; Nickel(ii)Hydroxide
Formula;NI3O6
Explanation:
will give brainliest if answered correctly
Subject is SCIENCE
Answer:
Gram
Centi-
Centimeter
Kilogram
Decimeter
Liter
Decimal System
Kilo-
Kilometer
Area
Which statement correctly describes a characteristic that a scientific measurement tool should have
Answer:
to be procice, it must use small units to take mesurements
Explanation:
a.pex
what is El Nino and La Nina, and how are they different?
Answer:
El Niño refers to the above-average sea-surface temperatures that periodically develop across the east-central equatorial Pacific. It represents the warm phase of the ENSO cycle. La Niña refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
write a balanced equation for the process of photosynthesis
Answer:
the answer is
Explanation:
6CO2 + 6H2O — > C6H12O6 + 6O2.
Answer: 6CO2 + 6H2O ---> C6H12O6 +6O2
sunlight
Couldn't do subscripts on my phone, but you probably know to put the 2s like that anyway, glad to help.
Explanation: The amount of matter that you start with you end with so you will have 6 carbon dioxide molecules and 6 water molecules and end up with the same amount of matter in your products, according to the law of conservation of matter.
what particles are arranged in a regular pattern
Explanation:
Phases of Matter
Question Answer
Vaporization that occurs at and below the surface of a liquid boiling
A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern crystalline solid
A solid made up of particles that are not arranged in a regular pattern amorphous solid
The molar mass of a gas is 56 grams. What is its density at STP in grams per liter?
Answer:
d = 2.5 g/L
Explanation:
Given data:
Molar mass of gas = 56 g/mol
Density of gas = ?
Temperature = 273.15 K
Pressure = 1 atm
Solution:
Formula:
d = PM/RT
d = 1 atm × 56 g/mol / 0.0821 atm.L/mol.K ×273.15 K
d = 56 atm g/mol./ 22.42 atm.L/mol
d = 2.5 g/L
What do you predict will happen with the
soap bubble when the bottle is placed into
the hot water?
explain why the reaction between lead (II) nitrate and concentrated sulphuric (VI) acid starts and stops immediately?
Answer:
The reaction produces insoluble lead (II) sulphate which coats the surface of lead (II) nitrate [Pb(NO3)]
Meg used two examples to represent two different states of matter.
Example 1: Young children dancing slowly around one another
Example 2: Newborn babies sitting in their given spots in a crib
Which statement is correct? (1 point)
a
Example 1 represents a gas and Example 2 represents a liquid.
b
Example 1 represents a liquid and Example 2 represents a gas.
c
Example 1 represents a liquid and Example 2 represents a solid.
d
Example 1 represents a solid and Example 2 represents a liquid.
Answer:
c Example 1 represents a liquid and Example 2 represents a solid.
Explanation:
Example 1: Young children dancing slowly around one another
The young children dancing slowly around one another can be pictured as the flow of liquid. In liquids, the molecules are held about weakly and they slide on top of each other. They are held by weak attractive forces. This is clear picture of a liquid.
Example 2: Newborn babies sitting in their given spots in a crib
This is clear example of a solid. In a solid the molecules are held about a fixed spot. The attractive forces in liquids is very great and the molecules therein do not move about randomly.
This is the balanced chemical equation for a reaction
between acetic acid (in vinegar) and sodium bicarbonate
(in baking soda).
C,H,O, + NaHCo, NaC,H,O, + H2O + CO2
Acetic acid
Water
Sodium
bicarbonate
Sodium
acetate
Carbon
dioxide
How does this balanced chemical equation represent the conservation of
matter in the chemical reaction?
O A. The coefficients are the same for each compound represented in
the reactants and products.
B. There are more carbon (C) atoms represented on the left-hand
side than on the right-hand side.
C. The amount of matter on the left-hand side is the same as the
amount of matter on the right-hand side.
D. There are more compounds on the right hand side than there are
on the left-hand side,
Answer:
C is the correct answer :)
Explanation:
In a balanced chemical equation, the amount of matter on the left-hand side of the chemical equation is the same as the amount of matter on the right-hand side. Therefore, option C is correct.
What is the balanced chemical equation?A balanced equation in which the number of atoms of each element is equal on the reactant, as well as the product side of the chemical equation.
The law of conservation of matter follows every balanced chemical equation. According to the law of conservation of matter, in a chemical reaction, matter can never be created or destroyed.
By obeying this law, the total amount of matter on the reactant side should be equal to the total amount of matter on the product side in a balanced chemical equation.
Given the reaction between acetic acid and sodium bicarbonate:
[tex]CH_3COOH + NaHCO_3\longrightarrow CH_3COONa +H_2O + CO_2[/tex]
The number of atoms of carbon, hydrogen, oxygen, and Na are equal on both sides of the reaction.
Learn more about the balanced chemical equation, here:
brainly.com/question/28294176
#SPJ2
Use your answers from questions 1–3 as the basis for the first section of your lab report. This section provides your reader with background information about why you conducted this experiment and how it was completed. Outline the steps of the procedure in full sentences. It also provides potential answers (your hypothesis/es) relative to what you expected the experiment to demonstrate. This section should be 1–3 paragraphs in length.
Answer:
1-state what the lab is about, that is, what scientific concept (theory, principle, procedure, etc.) you are supposed to be learning about by doing the lab. You should do this briefly, in a sentence or two. If you are having trouble writing the opening sentence of the report, you can try something like: "This laboratory experiment focuses on X…"; "This lab is designed to help students learn about, observe, or investigate, X…." Or begin with a definition of the scientific concept: "X is a theory that…." 2-give the necessary background for the scientific concept by telling what you know about it (the main references you can use are the lab manual, the textbook, lecture notes, and other sources recommended by the lab manual or lab instructor; in more advanced labs you may also be expected to cite the findings of previous scientific studies related to the lab). In relatively simple labs you can do this in a paragraph following the initial statement of the learning context. But in more complex labs, the background may require more paragraphs.
Explanation:
Answer: the correct answer is A
Explanation:
state which separation method you would use to separate potassium iodine solution
With over 6 billion people living on Earth, it is common for two people to have the same DNA.
True
ОR
False
PLEASE HELP ME !!!!!!!
Answer:
it would be 5,045
Explanation:
because it is closer to 5,000. pls correct me if wrong
which is not a redox reaction?
a. Formation of ammonium sulphate from ammonia and sulphuric acid
b. formation of nitrogen monoxide from ammonia
c. formation of sulphuric acid from sulphur
d. formation of zinc from zinc sulphide
help me please
Answer:
D. formation of zinc from zinc sulphide
Explanation:
A redox reaction could be explained as an artificial reaction in which electrons are moved between two reactants partaking in it. This substitution of electrons can be recognized by examining the variations in the oxidation states of the reacting classes. The generation of hydrogen fluoride is an illustration of a redox reaction. We can crack the reaction down to investigate the oxidation and loss of reactants.