How has the United States government tried to preserve water sources?

Answer:

C- A foot

Particularly a muscular foot.

Answer/Explanation

you"re right they have a foot

Muscular foot for creeping or burrowing. Some also have a head with sense organs.

did u need someone to confirm it or what

If the engines in both airplanes are at the same weight, the engines in both airplanes would still have the same mass because mass is constant everywhere.

Mass can be experimentally defined as a measure of the body's inertia, meaning the resistance to acceleration (change of velocity) when a net force is applied.

In the question, the same type of engine is placed in two different air-planes of which the first airplane is twice as heavy as the second.

We can then conclude that the  correct statement about the mass of the airplane and its acceleration, assuming a constant net force is that Increasing the acceleration of the air-plane causes the engine to provide more force.

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The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

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The weight of a calcium phosphate molecule is 310 amu. Phosphate ion's formula weight is 95 amu.

How can the weight in the formula be determined?

There are 3 calcium molecules, 2 phosphate atoms, and 8 oxygen atoms in calcium phosphate.

The white solids known as calcium phosphates have nutritional value and are present in many living things, such as bone mineral and tooth enamel. Colloidal calcium phosphate (CCP), which is found in milk in micelles bound to casein protein and exists in a colloidal form, is also known as calcium phosphate.

Ca = 3 x 40 = 120 amu

in which P=231=62 amu

for O=8×16=128

So, 310 amu is the total weight.

Phosphate is a

P = 131 = 31 amu

O = 416 = 64 amu

Thus, 95 amu is the total weight.

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At STP, 1 mole of any gas occupies 22.4 L of space. Since we are given STP conditions here, we can use this ratio to determine the number of moles of CO gas: (32.8 L CO)/(22.4 mol CO/L CO) = 1.51 mol CO.

So, there are 1.51 moles of CO gas.

Answer:

2

Explanation:

the number of H is 1, it means the only electron is on the energy level (1st level, s-electron). All the elements have 2 s-electrons on the 1st energy level.

Answer:

Ice

Explanation:

When ice melts it makes water

Answer:

One way is through fossil fuels. When people burn fossil fuels it enters the atmosphere as carbon dioxide gas. Another way is through animals. Most animals exhale carbon dioxide as a waste product which gets into the atmosphere.

Calculated with significant figures is 2804.4, which contains 5 sig figs and 1 decimal.

Three rules are used to determine the number of significant digits Non-zero numbers are always valid. All zeros between two significant digits are valid. Only trailing zeros or trailing zeros in the fractional part are significant. Enter a number or formula to calculate the number of digits and decimal places in your answer. contains 1 significant digit.

All zeros between two non-zero digits are valid. For example, 108.0097 contains 7 significant digits. Zeros to the right of the decimal point and to the left of non-zero digits have no meaning. For example, 0.00798 contained 3 significant digits. For example, the 3-digit power of 20,499 is 20,500. The first digit to round down is 9 so round up. 0.0020499 to 3 significant digits are 0.

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Answer:

2 molal solution means that 2 moles of solute is dissolved in 1 kg of solvent.

The balanced equation is:

The first step is to convert the given mass of magnesium to moles (MW=24.3g/mol):

Now, use the ratio given by the chemical equation:

Now, use the molecular weight of magnesium oxide to convert it to grams (MW=40.3g/mol):

The maximum mass of magnesium oxide produced is 1.612g.

The balanced form of the nuclear equation is as follows; 249/98 Cf + 15/7 N⟶ 260/105 Db + 4(1/0) n.

A nuclear equation is process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes.

According to this question, Californium element is a reactant to produce dubnium and a neutron as products.

However, the law of conservation of mass must be fulfilled by ensuring the mass and atomic numbers of elements in reactant and product side are the same.

249/98 Cf + 15/7 N⟶ 260/105 Db + 4(1/0) n

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Answer:

Physical

Explanation:

No new substance is formed.

The process can be reversed using evaporation to separate the sugar from the water

So the change is physical

Hope this helps :)

Answer:

Na3N

Explanation:

cuzdoodlikeimsosure

Answer:

The Tundra Climate

Explanation:

:) hope this helps

The property of metals that is not listed is "low melting point." In fact, metals generally have a high melting point, which means they require a lot of heat to change from a solid to a liquid state.

The other three properties listed are common characteristics of metals. Metals typically have a shiny surface due to their ability to reflect light, are malleable and can be hammered or pressed into different shapes, and have a low specific heat and heat capacity, which means they can absorb or release a lot of heat without experiencing a significant temperature change.

The net ionic equation for this gas evolution reaction is H+(aq) + SO32-(aq) SO2(g) + H2O, while the balanced molecular equation is 2HBr(aq) + K2SO3(aq) SO2(g) + 2H2O(l) + 2KBr(aq) (l).

The reaction's chemical formula is K2CO3(aq)+2HBr(aq)2KBr(aq)+CO2(g)+H2O. (l) Strong electrolytes in the process, K2CO3, HBr, and KBr totally dissociate in water to generate their corresponding ions.

A salt (the KBr) and water will be created when the HBr and KOH interact. While balancing this equation, make careful to count both hydrogen atoms on the reactants side.

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The magnetic quantum number (ml) represents the orientation of the orbital in three-dimensional space the only possible value of the magnetic quantum number ml for a 1s electron is 0.

Quantum is the smallest possible unit of a physical quantity, such as energy or momentum. It is a fundamental concept in quantum mechanics, which is the branch of physics that deals with the behavior of matter and energy at the atomic and subatomic level.

The idea of quantization was first proposed by Max Planck in 1900, when he discovered that energy is emitted and absorbed in discrete units called "quanta" when studying the behavior of light and blackbody radiation. Later, this idea was extended to other physical quantities, such as the momentum and position of particles.

According to quantum mechanics, the behavior of particles and systems cannot be fully described using classical mechanics, which assumes that particles have definite positions and velocities at all times. Instead, the behavior of particles and systems is described using wave functions, which represent the probability of finding a particle at a given position and time.

The principles of quantum mechanics have important applications in many areas of physics, including atomic and molecular physics, condensed matter physics, and particle physics. They are also the basis.

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Answer:

Places that get more solar energy have more heat. Places that get less solar energy have less heat. The air above the areas receiving more heat warms up and rises. Because of this, the air, ocean, and Earth's surface gets heated at the equator more than at the poles.

Explanation:

Answer:

no

Explanation:

The poles receive less energy than the equator, hence the poles being colder than the equator.

When the equilibrium constant is higher than one, it indicates that the reaction prefers to produce products, whereas if the equilibrium constant is less than one, it indicates that the reaction prefers to produce reactants. If the equilibrium constant is equal to one, the reaction proceeds in both directions equally.

In a chemical reaction, exothermic reactions are defined as reactions that release heat into their environment. It implies that heat is given off when reactants are converted to products. At equilibrium, an exothermic reaction continues to be exothermic, meaning that heat is given off even after the reaction reaches a state of equilibrium.There are two types of reactions: exothermic and endothermic.

A reaction is classified as exothermic if it releases heat, and endothermic if it absorbs heat. The direction of the reaction is determined by whether it is exothermic or endothermic. At equilibrium, the reaction is no longer moving forwards or backwards. It's also worth noting that reactions can be exothermic in one direction and endothermic in the other.

The equilibrium constant (K) is defined as the ratio of the concentration of products to the concentration of reactants in the chemical reaction equation. It is used to express how much of the products is generated by the reaction in comparison to the reactants.  the equilibrium constant aids in the identification of the direction in which the reaction will proceed at equilibrium.

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Mass percentage does not have any unit as numerator and denominator contains the same unit. Therefore, percentage of mass of sulfur is 20%.

Mass percentage represents the the percentage of each element that is making a particular compound.

Mathematically,

Percentage of mass = (component’s mass ÷ total mass) x 100%

mass of sulfur=32.07 g/mol

mass of CuSO₄= mass of copper +mass of sulfur+4×mass of oxygen

                         =63.55 g/mol+32.07 g/mol+4×16.00 g/mol

                         =160g/mol

Percentage of mass of sulfur = (32.07 g/mol÷ 160g/mol) x 100%

Percentage of mass of sulfur =20%

Therefore, percentage of mass of sulfur is 20%.

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Answer:

1. Practice healthy habits with kids in your life. ...

2. Engage in your school's efforts to encourage healthy practices. ...

3. Learn more about the decisions local officials are making that impact your environment. ...

4. Give back healthy options to your community.

Explanation:

\(\qquad\) ☀️\(\pink{\bf{ {Answer = \: \: 85.57g }}} \)

Molar mass of \(\bf Cu_2O \)

\(\qquad\) \(\twoheadrightarrow\sf 63.546 \times 2 +16\)

\(\qquad\) \(\pink{\twoheadrightarrow\bf 143.092 g}\)

As we know–

1 mol =\( \bf 6.02×10^{23} \) formula units

1 mol\(\bf Cu_2O \) = 143.092 g = \( \bf 6.02×10^{23} \)formula units

Henceforth –

\(\bf 3.60×10^{23} \) formula units \(\bf Cu_2O \)–

\(\qquad\) \(\sf :\implies \dfrac{143.092 \times3.60×10^{23 }}{6.02×10^{23}}\)

\(\qquad\) \(\sf :\implies \dfrac{143.092 \times3.60×\cancel{10^{23 }}}{6.02×\cancel{10^{23}}}\)

\(\qquad\) \(\pink{:\implies\bf 85.57 g}\)

The number of grams in 3.60 x 10^23 formula units of CU2O would be 85.54 grams

1 mole of any substance contains 6.022 x 10^23 atoms

In this case, the number of moles in 3.60 x 10^23 units of CU2O would be:

           3.60 x 10^23/6.022 x 10^23  = 0.6 mole  

Mass of 0.6 mole CU2O = 0.6 x 143.09

                                        = 85.54 grams

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The mass in grams for .65 moles of N₂ is 18.2g

What is Mole?

                  n = w / M

        where

 n = no of moles = .65

w = Mass of the given sample = ?

M = Molar mass ( Molar mass is same as molecular mass) = 28g

     substituting the values

              n = w / M

              w = n × M

                  = .65 × 28

                 = 18.2g

Thus we can conclude that  the mass in grams for .65 moles of N₂ is 18.2g

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The molar mass of the gas is obtained as 32.1 g/mol.

The molar mass has to do with the mass one mole of a substance. We know that according to the question, we can be able to obtain the number of moles of the compound from the ideal gas equation.

This is how we are able to get the number of moles of the gas as 0.14 moles. Now we need to use the information that we have to get the molar mass of the gass.

Number of moles = mass/ molar mass

Molar mass = mass/Number of moles

Molar mass =  4.5g/0.14  moles

= 32.1 g/mol

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