How does the Law of Conservation of Matter apply to you when you eat food? Why do you not continuously gain exactly the amount of mass you consume with each meal?

Answer:

3.6g

Explanation:

2 moles of water gives 1 mole of oxygen

2(h2o)=1(o2)

2(molar mass of h2o)=1(molar mass of oxygen molecule)

2(18)=1(16×2)

36=32

3.6=x

cross multiply

3.6×32=36× x

115.2=36x

x=115.2÷36

x=3.6g

The advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.

According to the definition of Bronsted-Lowry, a base is a proton acceptor. In that case, the concept of bases is not limited to only the hydroxide ions.

Thus the advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.

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Answer: To determine which of the given compounds will result in a solution with a pH greater than 7, we need to consider the behavior of the cation and anion in each compound in water.

Compounds that are made up of the conjugate base of a weak acid and a strong base, or a strong acid and the conjugate base of a weak base, will result in a basic solution. The conjugate base of a weak acid will hydrolyze in water, producing hydroxide ions (OH-) and resulting in an increase in pH. The conjugate base of a strong acid or a strong base will not hydrolyze, so it will not affect the pH of the solution.

With this in mind, we can identify the following compounds that will result in a solution with a pH greater than 7:

Therefore, the compounds that will result in a solution with a pH greater than 7 are MgF2, Na2CO3, and KC2H302.

1. How many oxygen atoms are in 96.1 g of CO₂?

To solve this problem we will have to do multiple conversions. First we will convert those grams into moles of molecules of CO₂. Then we will find the number of molecules of CO₂. And finally we will convert molecules of CO₂ to atoms of O.

We need the atomic mass of O and C to find the molar mass.

atomic mass of O = 16.00 amu atomic mass of C = 12.01

molar mass of CO₂ = 1 * 12.01 + 2 * 16.00

molar mass of CO₂ = 44.01 g/mol

Once that we know the molar mass of CO₂ we can find the number of moles of CO₂ that we have in 96.1 g of it.

number of moles of CO₂ = mass of CO₂/(molar mass of CO₂)

number of moles of CO₂ = 96.1 g/(44.01 g/mol)

number of moles of CO₂ = 2.18 moles

Using Avogadro's number we can find the number of molecules of CO₂ that we have in 2.18 moles of it.

1 mol of molecules of CO₂ = 6.022 * 10^23 molecules of CO₂

number of CO₂ molecules = 2.18 moles of molecules of CO₂ * 6.022 * 10^23 molecules of CO₂/( 1 mol of molecules of CO₂)

number of CO₂ molecules = 1.31 * 10^24 molecules

Since there are 2 atoms of O in 1 molecule of CO₂, we can calculate the number of O atoms that we have in 1.31 * 10^24 molecules of CO₂.

1 molecule of CO₂ = 2 atoms of O

number of O atoms = 1.31 * 10^24 molecules of CO₂ * 2 atoms of O/1 molecule of CO₂

number of O atoms = 2.62 * 10^24 atoms of O

Answer: there are 2.62 * 10^24 atoms of O in 96.1 g of CO₂.

0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

We can use the balanced chemical equation to determine the stoichiometry of the reaction and calculate the number of moles of HBr produced.

From the balanced chemical equation:

1 mol of H2 reacts with 1 mol of Br2 to produce 2 moles of HBr.

Since we are given the volume of hydrogen gas, we need to convert it to moles using the ideal gas law:

PV = nRT

Where

Assuming standard temperature and pressure (STP) conditions of 0°C and 1 atm, the volume of 6.6 L of hydrogen gas is:

n = PV/RT = (1 atm) x (6.6 L) / [(0.08206 L atm mol^-1 K^-1) x (273 K)]

n = 0.270 mol

Since the balanced chemical equation tells us that 2 moles of HBr are produced for every 1 mole of H2, we can calculate the number of moles of HBr produced as:

moles of HBr = (0.270 mol H2) x (2 mol HBr/1 mol H2) = 0.540 mol HBr

Therefore, 0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

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ionic solutions are good conductors of electricity. heterogeneous gaseous ionic covalent

Any sample of a solid, liquid, or gaseous mixture is said to be homogenous if the component ratios are constant. They are evenly dispersed in terms of their constituent parts, and the entire solution has a consistent look.

Components of a heterogeneous mixture have proportions that differ across the sample as a whole. In a heterogeneous mixture, the constituent parts may be seen and are not uniformly distributed. Any mixture with an uneven composition is referred to as a heterogeneous mixture. The components (sand and gravel) are clearly visible in a bucket but are not uniformly dispersed. That makes this a "heterogeneous blend."

___solutions are good conductors of electricity.

lonic

Covalent

Heterogeneous

Gaseous

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Answer:

the total weight of matter is conserved.

Explanation:

:)

Answer:

A

Explanation:

l took the test

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.

Hope it helps!

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According to the law of conservation of mass, the mass of the reactants and products before the reaction must be equal. He is mistaken since the process of rusting the nail is occurring, and the mass of the finished product is growing.

what is the law of conservation of mass?

According to the law of conservation of mass of reactants before the reaction must be equal to the mass of the product.

What is rusting?

Rusting is a form of oxidation. Rust is formed when iron combines with water and oxygen to generate hydrated iron oxide. Which is given by.

Iron is present in nails, which when coupled with oxygen produces ferrous oxide, which is heavier than iron. The mass of the reactants is therefore greater than the mass of the result.]

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There are eight valence electrons in CH₄.

The outermost shell of the orbital of an atom is known as the valence shell and the electrons occupying this shell are known as valence electrons.

The electronic configuration of C is 1s²2s²2p² , having four valence electrons in its outermost shell. So, carbon can form a maximum of four bonds. On the other hand, the electronic configuration of H is 1s¹, having one valence electron . So, H can form a single bond only.

Methane, (CH₄) is a covalent compound formed by covalent bonding between one carbon atom comprising four valence electrons and four hydrogen atoms comprising one valence electron each.

So, the total number of valence electrons in CH₄ compound is eight.

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7.65 moles of gas at STP would occupy a volume of approximately 171.36 liters.

To find out how many liters are in 7.65 moles of a gas, you will need to use the Ideal Gas Law equation, which is:

PV = nRT

In this equation:
P = pressure of the gas
V = volume of the gas in liters
n = number of moles of the gas
R = ideal gas constant (0.0821 L atm/mol K)
T = temperature in Kelvin

However, since we are not given the values for pressure (P) and temperature (T), we cannot calculate the exact volume (V) in liters for 7.65 moles of a gas.

If we assume standard temperature and pressure (STP) conditions, which are 0°C (273.15 K) and 1 atm, we can use the molar volume of a gas at STP, which is 22.4 liters/mol.

To calculate the volume in liters at STP, you can use the following formula:

V = n × molar volume at STP

Now, plug in the values:

V = 7.65 moles × 22.4 liters/mol

V ≈ 171.36 liters

So, under STP conditions, 7.65 moles of gas would be approximately 171.36 liters.

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Water is the lightest (least dense) when it freezes. So, the correct option is a) freezes.

Water is the lightest (least dense) when it is at a temperature of around 4°C (just above freezing). This is because as water approaches its freezing point, its molecules start to arrange themselves in a more ordered manner, with each molecule forming four hydrogen bonds with its neighbors. This arrangement causes the molecules to be more spread out and take up more space, leading to a decrease in the water's density.

However, as water continues to cool and reaches its freezing point, the molecules become even more tightly packed and form a crystalline structure, which causes the water to expand and become less dense. This is why ice floats on top of liquid water.

When water is heated, its molecules become more energetic and move around more, causing them to take up more space and decrease the water's density. However, this effect is not as significant as the expansion that occurs as water approaches its freezing point. At room temperature, the density of water is higher than at 4°C, but still lower than the density of ice.

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Answer:

Advantages :they are used for seeing chemical reactions .

they are used for doing chemical experiment .

they are used for making affective medicines .

Disadvantages :they harms to our environment.

they can make side effects in our body by affective medicines made by chemicals.

while doing different unknown experiments they make explosions which can also harm to us.

Answer:

The balanced net ionic equation of mixed AgNO3 and MgCl2 solutions is Mg2+(aq) + 2Cl–(aq) → MgCl2(s). AgNO3 and MgCl2 are both ionic compounds and the reaction is a double replacement reaction. AgNO3 is composed of silver ions (Ag+) and nitrate ions (NO3–) while MgCl2 is composed of magnesium ions (Mg2+) and chloride ions (Cl–). When these two compounds are mixed together, the silver and nitrate ions react with the magnesium and chloride ions to form the silver chloride (AgCl) and magnesium chloride (MgCl2) products.

Answer:

whyyyy?what happened hmmmm hahahahahhajajaha

Aldohexoses have four chiral focuses and, in this way, 24 = 16 isomers. There will be eight d-isomers and eight l-isomers. Thusly, the quantity of enantiomer matches is 8 (2n−1).

An aldohexose has four chiral focuses.

So there are

24=16

optical isomers.

Their perfect representations are the L-aldohexoses, the other 8 of the 16.

Their names are L-allose, L-altrose, L-glucose, and so on.

Consequently, every one of the 16 aldohexoses has its own name.

The four chiral focuses in glucose show there might be upwards of sixteen (24) stereoisomers having this constitution. These would exist as eight diastereomeric sets of enantiomers, and the underlying test was to figure out which of the eight related to glucose. This challenge was acknowledged and met in 1891 by German physicist Emil Fischer. His fruitful exchange of the stereochemical labyrinth introduced by the aldohexoses was a sensible masterpiece, and it is fitting that he got the 1902 Nobel Prize for science for this achievement. At the time Fischer embraced the glucose project laying out the outright setup of an enantiomer was unrealistic. Thusly, Fischer pursued an erratic decision for (D)- glucose and laid out an organization of related aldose setups that he called the D-family. The identical representations of these arrangements were then assigned the L-group of aldoses. To represent utilizing present-day information, Fischer projection formulas and names for the D-aldose family (three to six-carbon atoms) are displayed underneath, with the uneven carbon atoms (chiral focuses) hued red.

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Bond angles also have an effect on the structure of molecules. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetraheral, trigonal-bipyramidal, and octahedral structures.

Thus, the molecular structure is bent at an angle just shy of 109.5° and the electron-pair geometry is tetrahedral.

The first four domains—Nutrition, Environment, Health, and Behavior—all contribute to our understanding of the animal's diverse experiences, which comprise the fifth domain, the Mental Domain.

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question:-

Select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry?

a: The trigonal bipyramidal system has two different bond angles.

b: A species with 3 electron domains will exhibit an ideal bond angle of 120o.

c: A bond angle of 180o is observed for a linear system.

the area where it's most likely that electrons will be detected (bonding and nonbonding). One portion of an electrons domain is represented by a lone pair, singles, doubles, and triple bond.

Two categories of electron domains exist: 1) A bound atom, and 2) an electron pair that is not ponding. All bonded atoms count as one electrons domain on the center atom, regardless of whether they are connected by a single, double, or triple bond. There are five fundamental geometries for electron domains.

Geometries of the electron domain. The five shapes that molecules can have in their electron domain geometries are linear, tetrahedral, triangular planar, triangular bipyramidal, and octahedral. Both the geometries and the forms of molecules exhibit many exceptions. They could be twisted, T-shaped, square planar, etc.

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The mass of a sample of O2 gas which occupies 0.95 L at 1.2 atm and 355 K is 0.62 g O2.What is the mass of a sample of O2 gas which occupies 0.95 L at 1.2 atm and 355 K?

The mass of a sample of O2 gas which occupies 0.95 L at 1.2 atm and 355 K can be determined as follows:

Molar mass of O2 gas = 32 g/mol

Volume of gas = 0.95 L

atm = 1.2

Pressure of gas = 1.2 atm

Temperature of gas = 355 K Now, the number of moles of O2 gas can be determined using the ideal gas equation

PV = nRT Here,

P = pressure of gas

V = volume of gas

n = number of moles of gas

R = universal gas constant

T = temperature of gas Plugging in the given values, we get

n = PV/RT

= (1.2 x 0.95)/(0.0821 x 355)

= 0.040 mol The mass of O2 gas can be calculated as:

m = n x M where,

m = mass of O2 gas

n = number of moles of O2 gas

M = molar mass of O2 gas Plugging in the given values, we get

m = 0.040 x 32

= 1.28 g Therefore, the mass of a sample of O2 gas which occupies 0.95 L at 1.2 atm and 355 K is approximately 0.62 g O2.

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Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.

Tectonic pressure in a crust can cause folding. Folding can end up with  the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.

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Answer: X should represent H, hydrogen.

Explanation:

The H is the only one that hasnt been stated in the left side of the formula. H has three atoms as well.

Answer:

180

Explanation:

proton = 80

electron = 80

neutron = 100

Note:- the atomic number of an element is the number of protons/electrons in the atomic shell

(protons = electrons)

Mass number = number of protons/electrons + number of neutrons

MN= NP+ NN

MN = 80 + 100

MN= 180

I HOPE THIS HELPS

The amount (g) for pure MgSO4 in the following statement is actually 2. 4 g pure MgSO4•7H2O was 1.2 g MgSO4.

A Quick Look at Quantity. When referring to just a single word that CANNOT be measured, use the word amount. - When referring to a solitary or plural term that CAN be counted, use number. – When referring to an inanimate, singular or plurality word that is counted or measured, quantity should be used.

%MgSO4 in MgSO4.7H2O is determined as x 100 = ?

Molar mass of MgSO4.7H2O is 246.4746 g/mol

Molar mass of MgSO4 is 120.366 g/mol.

In MgSO4.7H2O, %MgSO4 = 120.366 / 246.4746 = 0.488 x 100 = 48.8

2.4g × (%MgSO4/100) = 2.4 x (48.8/100) =

2.4 x 0.48

= 1.2g MgSO4

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Answer:

Subjectivity

Explanation:

Took test Forensic Science

The Na+/K+ pump helps a muscle cell maintain a state of "resting membrane potential." The resting membrane potential is the difference in voltage across the cell membrane when the muscle cell is not actively contracting.

The Na+/K+ pump plays a crucial role in this process by actively transporting three sodium ions (Na+) out of the cell and two potassium ions (K+) into the cell.

This exchange creates an electrochemical gradient, resulting in a net negative charge inside the cell and a net positive charge outside the cell.

This gradient is essential for the proper functioning of muscle cells, as it allows them to respond to stimuli and initiate muscle contractions.

In summary, the Na+/K+ pump is essential for maintaining the resting membrane potential in muscle cells, ensuring their proper function and responsiveness.

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