Answer:
the answer is A
Explanation:
Susie cooked sausages on a barbecue. Fat and water in the sausages changed state. which two changes of state occur during this process? a. Fat melted b. Water evaporated
Answer:
The options a and b are correct
Explanation:
This options provided to the question are the answers to the question. But for clarification. When the fat melts, the change of state that occurs here is from solid to liquid (which is called melting) while the change of state that occurs when the water evaporated is from liquid to gas (which is called evaporation).
5. What do the data in your graphs tell you? Explain in one or two sentences what trend the reader should observe in each of your graphs. (Science Lab Report, if you don't know what the answer is please don't answer-)
Answer:
Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and If the data shows pronounced trends or reveals relations between variables, a graph should be used.
Explanation:
literally bro i had the same answer for my actual project for edge
Answer: Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and If the data shows pronounced trends or reveals relations between variables, a graph should be used.
Explanation:
A high school chemistry teacher asks four student groups to determine the number of protons, neutrons, and electrons (respectively) present in an ion of Titanium (Ti 2+). Which student group provides the best answer?
Answer:
Electrons - 20
protons - 22
neutrons - 26
Explanation:
Titanium has an atomic number of 22 indicating that the neutral atom has 22 protons.
Ti 2+ has lost two electrons and contains only 20 electrons, 22 protons.
The mass number of titanium is 48. Hence;
Mass number = atomic number + number of neutrons
Since the atomic number is 22 and the mass number is 48
number of neutrons = 48 - 22 = 26 neutrons
What is the formula for nitrogen monoxide?
O N203
O NO
O N₂O,
O None of the answers are correct
HELP!!!!!! WILL MARK BRAINLIEST!!!
Fill in the blank.
Atoms are held together in molecules by _______.
_______ are compounds with the same chemical formula but different molecular structures.
A/An _______ indicates the ratio of atoms in a molecule.
_______ are similar to molecular formulas but show how atoms are bonded together.
When two atoms of the same element combine to form a molecule, this is called a _______ molecule.
The breaking and forming of bonds between atoms in substances results in changes in the _______ contained in the substances.
Respond to the following based on your reading.
Give two purposes for the systematic naming of chemicals.
Name the elements in the molecule H2SO4 and tell how many atoms of each element are present.
How many molecules are represented by 3CO2?
Answer:
1. Covalent Bond
2. Isomers
3. Molecular and Empirical Formula
4. The Structural Formula
5. Diatomic Molecules
1. Hydrogen and Tetraoxosulphate. There are 2 atoms of hydrogen and 4 atoms of tetraoxosulphate.
Explanation:
Sorry, I wrote all I know
Which list contains only animal phyla? mosses, annelids, conifers, chordates mosses, ferns, conifers, flowering plants cnidarians, mollusks, annelids, arthropods, echinoderms, chordates cnidarians, ferns, annelids, arthropods, echinoderms, flowering plants
Answer:
cnidarians, mollusks, annelids, arthropods,
Explanation:
Living organisms have been grouped using a system of classification that runs from Kingdom to Species. One of those kingdoms is KINGDOM ANIMALIA, which consists of animal species i.e. organisms that are strictly heterotrophic and eukaryotic.
The next taxa after kingdom is PHYLA. According to this question, the phyla which consists of only animals are cnidarians, mollusks, annelids, arthropods. Other options contain ferns, mosses, and flowering plants which belong to Kingdom Plantae.
Answer:
on edge its C
Explanation:
How do you determine if you have a covalent bond?
Answer:
If the electronegativity difference (usually called ΔEN) is less than 0.5, then the bond is nonpolar covalent. If the ΔEN is between 0.5 and 1.6, the bond is considered polar covalent. If the ΔEN is greater than 2.0, then the bond is ionic.
Explanation:
Hope this helped :)
Critical thinking : Place an unmagnetized piece of iron in a magnetic field (eg iron filings near a magnet). Why is it attracted to the magnet?
Magnets attract iron due to the influence of their magnetic field upon the iron. Before a piece of iron enters the magnet, the polarization of the irons atoms is random. When exposed to the magnetic field, the atoms begin to align their electrons with the flow of the magnetic field, which makes the iron magnetized as well. This, in turn, creates an attraction between the two magnetized objects. This is why a piece of iron that is exposed to a magnet becomes magnetic for some time afterward.
PLEASE HELP ASAP I EILL GIVE 100 POINTS!!! Kristy is on the track team. She runs the one kilometer race by going four times around the circular track. How does Kristy velocity change.
A. Her velocity changes countinually since her direction constantly changes
B. Her velocity depends on only on how she paces herself during the race
C. Her velocity is the same as her speed
D. Her speed changes at the same rate as velocity
Answer:A
Explanation:
method used to separate ethanol from propanol
:answer question number 10
Answer:
the last one
Explanation:
I'm pretty sure
Answer:
Particles on each are constantly moving (the last one)
NH4, C032. OH", and PO43- are all examples of
Answer:
the popultion of it
Explanation:
NH₄+ , (CO₃)₂- , OH- , (PO₄)₃- are all examples of polyatomic ions.
What are Polyatomic ions?A covalent bound type of collection of two or more atoms or of a metal complex that can be said as behaving as a single unit and that has a net charge which is not zero is referred to as a polyatomic ion or a molecular ion.
Depending on the terminology , a polyatomic ion may or may not be referred to as a molecule. The Greek word poly- that means "many," although even ions made of just two atoms are frequently referred to be polyatomic.
A polyatomic ion may also be referred to as a radical (or less commonly, as a radical group).
The term "radical" today refers to a variety of free radicals, which are species with an unpaired electron and do not require a charge.
The hydroxide ion, which has the chemical formula OH- and is made up of one oxygen and one hydrogen atom and has a net charge of 1, is a straightforward example of a polyatomic ion.
A nitrogen atom, four hydrogen atoms, and a charge of +1 make up an ammonium ion, which has the chemical formula NH₄+.
In the context of acid-base chemistry and the production of salts, polyatomic ions are frequently helpful.
A polyatomic ion is frequently thought of as the conjugate base or acid of a neutral molecule. For instance, the polyatomic hydrogen (H₂) sulphate anion (SO₄) is the conjugate base of sulfuric acid (H₂SO₄). The sulphate anion (SO₄)₂ is created when another hydrogen ion is eliminated.
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Which of the following most completely describes a redox reaction?
O A. A chemical decomposition reaction
B. A hydrocarbon combustion reaction
O c. A reaction resulting in electron sharing
D. An oxidation and reduction reaction
Answer:
D.
Explanation:
Because i just copied the person above tbh, and i also got it right in the quiz
To solve such this we must know the concept of redox reaction. Therefore, the correct option is option D that is an oxidation and reduction reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Redox reaction is a chemical reaction where oxidation and reduction takes place simultaneously. Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant.
Therefore, the correct option is option D that is an oxidation and reduction reaction.
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1000 cm3 of Helium has a mass of 178.5 grams. What is the density of Helium gas?
Answer:
The answer is 0.18 g/cm³Explanation:
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{178.5}{1000} \\ = 0.1785[/tex]
We have the final answer as
0.18 g/cm³Hope this helps you
The repeating subunits that are responsible for the chance of a crystal are know as
unit cells
heavy nuclei
light electrons
amorphous cells
i have the most potential energy if i am
Answer:
travel the world in one day
What is the temperature of someone with a fever? Select the better estimate.
40°F
40°C
Answer:
40°C
Explanation:
THIS S VERY HIGH FEVER
AS 40°C = 104°F
The independent variable and dependent and constant
Answer:
Explanation:
independent-longer wire
dependent-bulbs being brighter
constants-lamp brand and so on
What mass of ethanol will release 410.0 J of heat when it cools
from 32.2°C to 19.1°C?
The specific heat of ethanol is 2.44 J/gºC.
12.8 g
(Don’t have explanation but it is right on CK-12)
what are chiral carbon
Answer:
A chiral carbon is a carbon bonded to four different groups ( four groups as carbon forms four bonds). The molecules formed are non superimposible on its mirror image.
Which of the following best describes the Valence Shell Electron Pair Repulsion Theory (VSEPR)?
Answer:
Electron pairs are arranged as far apart from each other as possible.
Explanation:
Like charges repel therefore, VSEPR theory is the "...repulsions between electron pairs present in the valence shell of the central atom."
Balance the following reaction. A coefficient of "1" is understood. Choose the option "blank" for the correct answer if the coefficient is "1."
C3H8 + O2 → CO2 + H2O
Answer:
Hope this helps!
Explanation:
For the following problems, identify the substance as either an element, a compound, or a mixture. Write E for Element, C for compound, and M for mixture. 34. Silicon ___E__ 35. Salad dressing __M___ 36. Table Salt (NaCl) __C___ 37. Oatmeal with apples and raisins_____ 38. Lithium _____ 39. Copper Sulfate (CuSO4) _____
Answer:
Explanation:
34. E
35. M
36. C
37. M
38. E
39. C
One litre of hydrogen at STP weight 0.09gm of 2 litre of gas at STP weight 2.880gm. Calculate the vapour density and molecular weight of gas.
Answer:
we know, at STP ( standard temperature and pressure).
we know, volume of 1 mole of gas = 22.4L
weight of 1 Litre of hydrogen gas = 0.09g
so, weight of 22.4 litres of hydrogen gas = 22.4 × 0.09 = 2.016g ≈ 2g = molecular weight of hydrogen gas.
similarly,
weight of 2L of a gas = 2.88gm
so, weight of 22.4 L of the gas = 2.88 × 22.4/2 = 2.88 × 11.2 = 32.256g
hence, molecular weight of the gas = 32.256g
vapor density = molecular weight/2
= 32.256/2 = 16.128g
hence, vapor density of the gas is 16.128g.
Explanation:
Which of the following is TRUE about when two atoms form a bond? a. Repulsion is greater than attraction b. Neither atoms will have a full valence shell c. Potential energy is at a minimum
Answer:
b: Neither atoms will have a full valence shell
Explanation:
I think sooo
The movement of air caused by differences in air pressure is __________________.
Answer:
wind
Explanation:
it would be naturally caused by the pressure
Answer:
temperature or pressure differences
Explanation:
can someone help me identify the elements please, i rlly need help
Answer:
1 : any of more than 100 substances that cannot by ordinary chemical means be separated into different substances Gold and carbon are elements. 2 : one of the parts of which something is made up There is an element of risk in surfing. 3 : the simplest principles of a subject of study the elements of arithmetic.
Explanation:
Which element is a metal? A. K
B. Kr
C. F
D. He
please help, if you’re right i’ll give brainliest and 35 more points
Answer: A
Explanation: Potassium is a metal.
Which of the following is an extensive property of a sample of aluminum?
Answer:
Entropy,mass and volume.... I think
Mass is the extensive property of a sample of aluminum. Therefore, option (A) is correct.
What is the extensive property of matter?The extensive property can be described as a physical property of matter that changes with a change in the size and shape of the matter. Therefore, the extensive property of any substance varies directly with the mass.
Extensive properties are the value of the property of the system that must be equal to the sum of the values of different parts of the system. These properties depend on the amount of matter contained in the system.
Examples of Extensive properties are temperature, pressure, density, boiling point, etc. The ratio of the two extensive properties is an intensive property such as density.
The mass of a sample of aluminum is an example of extensive property as it depends on the amount of aluminum in the given sample. This property of the sample is proportional to the size of the system.
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Your question is incomplete, most probably the complete question was,
Which of the following is an extensive property of a sample of aluminum?
A) Mass
B) Temperature
C) Pressure
D) Density
can someone tell me how I find the atomic radius of atoms and what they are. Thank youuuuuuuuu
Answer:
The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms and then halving that distance. Measuring the atomic radii of chemical elements is a complicated task as the size of an atom is of the order of 1.2×10-10 m. The electron cloud forming the shell of an atom does not have any fixed shape which makes it difficult to determine the atomic size of an atom. So we can say that practically we cannot determine the size of an individual atom.
Atomic Radius:
Atomic radius is the distance from the center of the nucleus to the outermost shell containing electrons.
Explanation: