Answer:
true
I hope it helps.
When magnesium (Mg) metal is burned in the presence of oxygen (O2), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is a compound and cannot be separated __________.
Answer:
a compound
Explanation:
I need help with stoichiometry
Solve pls brainliest
The two green substances are not same thing because some of their properties are different and some of them are the same. If they were the same substance, all of their properties would have to be the same.
How could the explanation be improved?
Answer:
Even though the two substances possess many similarities, they have some unique properties. In turn, since they have the same properties, if they were the same substance, it would make matters worse, if the same chemical was in two different places, there would not be a difference between them since they are the same, just as it is with are two different chemicals would have differing properties since they are two properties would vary from one another since they are 2 totally different things!
Why is water so susceptible to pollution?(1 point)
It's a universal solvent.
It occurs naturally as a solid, liquid, and gas.
It can be found underground.
Only 3% of Earth's water is freshwater.
Reactions cannot occur without a certain minimum amount of energy. What is this minimum amount of energy called?
the activation energy
the activated complex
the kinetic energy of reactants
the potential energy of products
Gaseous chlorine, Cl2, was combined with 0.532g of Titanium, and 2.108 g of TixCly were collected. What is the empirical formula of titanium chloride?
Answer:
TiCl₄
Explanation:
From the law of conservation of mass, the mass of the reactants must equal the mass of the products. In other words:
[tex]\displaystyle \text{m Cl$_2$} + \text{ m Ti} = \text{ m Ti$_x$Cl$_y$}[/tex]
Find the mass of chlorine gas reacted:
[tex]\displaystyle \begin{aligned} \text{ m Cl$_2$} + (0.532 \text{ g}) & = (2.108 \text{ g)} \\ \\ \text{m Cl$_2$} & = 1.576 \text{ g} \end{aligned}[/tex]
Find the number of moles of each reactant using their respective molecular weights:
[tex]\displaystyle 1.576 \text{ g Cl$_2$} \cdot \frac{1 \text{ mol Cl$_2$}}{70.90\text{ g Cl$_2$}} \cdot \frac{2\text{ mol Cl}}{1\text{ mol Cl$_2$}} = 0.04446\text{ mol Cl}[/tex]
And:
[tex]\displaystyle 0.532\text{ Ti} \cdot \frac{1\text{ mol Ti}}{47.87\text{ g Ti}} = 0.0111\text{ mol Ti}[/tex]
To find the empirical formula, all values by the smallest value:
[tex]\displaystyle \begin{aligned} \frac{0.0111\text{ mol Ti}}{0.0111} & = \frac{0.04446\text{ mol Cl}}{0.0111} \\ \\ 1\text{ mol Ti} & \approx 4\text{ mol Cl}\end{aligned}[/tex]
Hence, there are four moles of chlorine for every one mole of titanium.
In conclusion, our empirical formula is TiCl₄.
what sea animals have moveable spines that they use for protection
Answer:
sea urchins
Explanation:
Answer:
sea urchins
Explanation:
i took the test
When 0.019 mol of aluminum sulfate are dissolved in enough water to make 905 milliliters of solution, what is the molar concentration of aluminum ions? Answer in units of M
A student mixes 20.0gof white KCl crystals with distilled water in a beaker. After the mixture was stirred, no crystals are visible and the solution is clear. After several days, all of the water evaporates and white crystals are found in the beaker. Which of following pieces of experimental evidence would best help the student to confirm that a new compound had not been made and that only a physical change occurred?
a- The solution does not change color after stirring.
b- The KCl crystals are no longer visible after mixing with water.
c- There is a temperature change in the solution during the dissolving process.
d- After the water has evaporated, the white crystals in the beaker have a mass of 20.0g
Answer:d
Explanation: over time water evaporates which leaves you with the white crystals mass
A student in a beaker mixes 20.0 g of white KCl crystals with distilled water; no crystals are visible, and the solution is clear, indicating that the physical change has occurred, which is that after the water has evaporated, the white crystals in the beaker have a mass of 20.0 g; that is option d.
What is the significance of the physical change?The physical change includes the change in the shape and size of the substances but not the chemical change, as in the case of here the crystal, which is left behind after the evaporation of the solution without any change in the chemical composition.
Hence, a student in a beaker mixes 20.0 g of white KCl crystals with distilled water; no crystals are visible, and the solution is clear, indicating that the physical change has occurred, which is that after the water has evaporated, the white crystals in the beaker have a mass of 20.0 g; that is option d.
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The electron-domain geometry of a sulfur-centered compound is trigonal bipyramidal. The hybridization of the central sulfur atom is ________.
The hybridization state of the central sulfur atom is sp3d.
The valence shell electron pair repulsion theory describes the shape of molecules in terms of the number of electron pairs that surround the valence shell of the central atom in the molecule.
There are certain molecular shapes that are associated with certain hybridization states of the central atom. Since the central sulfur atom is trigonal bipyramidal, the hybridization state is sp3d.
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The drummer is the best performer. What is the noun in this sentence
Answer:
Performer if not I say drummer
let me know the answer!
Explanation:
Which element are in the compound CoCI2?
Choose all correct answers.
Answer:
the answer is cobalt and chloride
Is this soulution acidic or basic
Ph= 12
Basic
Acidic
Answer:
basic
Explanation:
ph>7 soits basic not acidic
Answer: A pH greater than 7 is basic
Explanation:
Because if you look at a ph scale the number 12 is apart of the alkaline part. if its apart of the alkaline park it mean it is not a basic acidic
What can form along faults when pushed together or pulled apart?
O Mountains
O Volcanoes
O Both
Answer:
Both
Explanation:
if you pull a mountain a part that would be great consequences and if a volcano breaks there will be fire .
how do i find the name of an element
Answer:
The periodic table will say it underneath the symbol.
Explanation:
I don't know how else to describe it but I hope this helps. :)
Find the density of an 8 gram rock if the water in a graduated cylinder rises from 25.0 mL to
29.0 mL when the rock is placed in to the graduated cylinder.
To measure the density of the stone placed in a graduated cylinder let us follow these steps bellow
Measure the volume of water poured into a graduated cylinderPlace the object in the water and remeasure the volume. The difference between the two volume measurements is the volume of the object. Divide the mass by the volume to calculate the density of the object.We know that the formula for density is given as
Given data
Mass = 8gram
Initial Volume of water in cylinder = 25mL
Final Volume of water in cylinder = 29mL
Hence the volume of the rock = 29-25 = 4mL
Therefore the density of the rock = 8/4 = 2 g/mL
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Which statements best describe the functions of nucleic acids and proteins?.
The statement describing nucleic acid has been that nucleic acid provides the blueprint for the formation of proteins.
Nucleic acid has been the genomic material in the body that performs the function of storage of information. DNA and RNA are nucleic acids.
The proteins are the biomolecules that are composed of amino acid units bound by the polypeptide bond. The information for the correct sequence of binding of protein has resulted from the mRNA codes.
The correct sequence and folding results in the operational protein, that has been able to perform varying functions. The codes for the binding of protein have resulted from the blueprint consisting of nucleic acid.
Thus, nucleic acid performs the function of acting as a blueprint for the formation of proteins.
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Help me ASPAPPPPPPPPP
Answer:
Explanation:
1. H2O
Lewis Dot:
See the attachment.
Note the б+ and б- signs on the H and O atoms, respectively. Those represent the slightly positive and slightly negative sides of the water molecule. Those slight charges on a single water molecule are attracted to their opposite charges on neighboring H2O molecules, as shown in the graphic. This interaction is what gives water it's cohesive properties.
3. The property of cohesion describes the ability of water molecules to be attracted to other water molecules. which allows water to be a "sticky" liquid.
The hydrogen bonds are attractions of electrostatic force. They arise due to the difference in charge between the slightly positive hydrogen ion and the slightly negative oxygen ion. Hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond, and it is what gives water it's cohesiveness, or ability to support water spiders, paper clips, and produces a loud noise in the event of a belly flop in a pool (including the yelp from the swimmer).
4. I'm not sure what is being asked for the two blanks. Water is polar and dissolves salts (ionic compounds) and hydrophilic molecules (water-loving molecules).
can someone in here please answer there question for the love of god
Which neutral atom is isoelectronic with N-3?
The neutral atom is isoelectronic with N⁻³ is Neon (Ne).
Isoelectronic are those which have same number of electrons or we can say that same electronic structure.
For finding out that the species are isoelectronic , we just have to count there no. of electrons of atoms and if they have same no. of electron then they said to be isoelectronic species.
no. of electrons in Nitrogen N = 7 ( atomic no.)
no. of electrons in Nitride ion N⁻³ = 7 + 3 = 10
no. of electrons in Neon Ne = 10 ( atomic no. and neutral atom)
so, no. of electrons in Nitride ion N⁻³ = no. of electron in Neon Ne
this means , N⁻³ , Nitride ion is isoelectronic with Neon Ne.
Thus, The neutral atom is isoelectronic with N⁻³ is Neon (Ne).
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For the balanced equation shown below, how many grams of CO2 will be
produced from 74.23 grams of CO? CO + Fe3O4 → 3FeO + CO2
Answer:
116.64 g
Explanation:
74.23÷14 This is # of moles .
# of moles for co = 5.302
Then mass of co2 = 116.64
What does the answer of element 3Na2S2O3?
Answer:
Explanation:
3× 22+2×32+ 6×16=
66+64+96=236
Who turned the ragged Continental Army into a more efficient fighting force?
distinguizh between the 4 states ofmatter
Answer:
There are four natural states of matter: Solids, liquids, gases and plasma. ... Solids have a definite shape, as well as mass and volume, and do not conform to the shape of the container in which they are placed. Solids also have a high density, meaning that the particles are tightly packed together.
Explanation:
hope this helps! goodluck & enjoy the rest of ur day or night.
Whats the different between chemical property and chemical change, and physical property and physical change?
Answer:
I think the answer is A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
I hope this helps.
Answer:
Physical change is the same substance, while a chemical change is a new substance.
A sample of Ar gas occupies a volume of 1.2 L at 125 degrees * C and a pressure of 10 atm. Determine the temperature , in degrees Celsius, at which the volume of the gas would be 1.0 L at the same pressure .
Answer:
58.64
Explanation: You want to use the combined gas law equation (P1*V1)/(n1*T1)=(P2*V2)/(n2*T2). So first cross out what remains constant, so pressure and I assume moles (since it was not mentioned as a change). You want to change the temperature to Kelvin (always) to do work, then you can solve algebraically for the answer! Once you have your answer change it to Celsius since that's what you were asked for.
Hope this helped!
write a balanced equation for the formation of co2 g from c s and o2 g
Answer:
C (s) + O2 (g) > CO2 (g)
That's what I got
Calculate the molar mass of NH4NO3. Molar mass of NH4NO3 = g/mol.
The molar mass of NH4NO3 in g/mol is 80g/mol.
HOW TO CALCULATE MOLAR MASS:
The molar mass of a compound can be calculated by summing the atomic masses of its constituent elements.
In ammonium nitrate (NH4NO3), there are nitrogen, hydrogen, and oxygen elements.
Atomic mass of nitrogen = 14Atomic mass of oxygen = 16Atomic mass of hydrogen = 1Molar mass of NH4NO3 = 14 + 1(4) + 14 + 16(3)
Molar mass of NH4NO3 = 80g/mol
Therefore, the molar mass of NH4NO3 in g/mol is 80g/mol.Learn more about molar mass at: https://brainly.com/question/8101390?referrer=searchResults
Answer:
80g/mol
Explanation:
edge 2022
Four students wrote down their descriptions of rotting.
Nick: Rotting is a chemical change that happens to fruit like strawberries or apples. Rotting happens slower when there is more heat.
Kevin: Rotting is a chemical change that happens to iron objects like nails. It causes iron objects to change color and texture.
Howie: Rotting is a physical change that happens to food like fruit. Rotting happens faster with increased heat and changes a fruits color and odor.
AJ: Rotting is a chemical change that affects food such as fruit. Rotting changes the fruits color and odor and happens faster with increased heat.
Which student had the best description of rotting?
Nick
Kevin
Howie
AJ
Answer:
Technically only AJ got it correct Howie got it wrong because rotting is a chemical not a physical change AJ was correct becuase he knew what would make the fruit go faster so yes howie would have been right if he got the right kind change.
Explanation:
hope this help
How does VSEPR theory describe the double bonds between the central carbon atom and each oxygen atom of Co2?
The double bonds in CO2 are counted as single regions of electron density.
The valence shell electron pair repulsion theory VSEPR is a description of the shape of molecules based on the number of electron pairs that surround the central atom in the molecule. Double bonds are counted as a single region of electron density.
Hence, the two double bonds in CO2 are counted as two regions of electron density around the central carbon atom. Hence, the molecule is liner at a bond angle of 180 degrees.
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