What happens to ice as it melts energy

Answer: One formula unit of NaCl consists of one cation, whose chemical symbol is \(Na^+\) and one anion whose chemical symbol is \(Cl^-\)

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

The cation is formed by the metal sodium which forms  \(Na^+\) and the anion is formed by non metal chlorine which forms \(Cl^-\).

For a formula unit of sodium chloride,  the charges have to be balanced , thus the valencies of ions are exchanged and the neutral compound result. Thus

\(Na^+\) and  \(Cl^-\) combine to form neutral \(NaCl\)

Answer:

212 degrees

Explanation:

Answer:

212 degrees Fahrenheit

Explanation:

Similarly, if we heat a volume of water above 100 degrees Celsius, or 212 degrees Fahrenheit, water changes its phase into a gas called water vapor. Changes in the phase of matter are physical changes, not chemical changes.

1. The equation is not balanced. The balanced equation is \(4NH_3 + 5O_2 --- > 4NO +6 H_2O\)

2. The equation is balanced.

3. The equation is not balanced. The balanced version is \(2H_2O --- > 2H_2 + O_2\)

A balanced chemical equation usually has the same number of atoms of different elements in the reactants and the products, even though the forms of the atoms might have changed.

Consider the first equation: \(NH_3 + O_2 --- > NO + H_2O\)

The number of hydrogen atoms is not balanced. Thus, the equation that shows balanced atoms of different elements would be: \(4NH_3 + 5O_2 --- > 4NO +6 H_2O\)

Consider the second equation: \(N_2 + 3H_2 -- > 2NH_3\)

There are 2 atoms of nitrogen in the reactants and there are also 2 in the product. The number of hydrogen atoms is 6 in the reactants and 6 in the products. Thus, it is a balanced equation.

Consider the third equation: \(2H_2O --- > H_2 + O_2\)

There are 4 hydrogen atoms in the reactant and only 2 in the products. The balanced equation would be: \(2H_2O --- > 2H_2 + O_2\)

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Answer:

because it is keeping the freezer cold inside, bringing all the warm air to the outside

Answer:

reactant

Explanation:

I watched a chem video and this is what they called it.

Using the mass of the anhydrous salt instead of the hydrated salt can have a significant effect on the percentage of water in the sample.

When we calculate the percentage of water in a sample, we typically use the mass of the hydrated salt because it includes the mass of the water molecules present in the sample. However, if we use the mass of the anhydrous salt instead, we are essentially ignoring the mass of the water molecules and assuming that they are not present. This can lead to an inaccurate calculation of the percentage of water in the sample.

For example, let's say we have a hydrated salt with a mass of 10 grams, and we want to calculate the percentage of water in the sample. If we assume that the salt is anhydrous and use its mass instead, we might end up with a much lower percentage of water than is actually present in the sample.


In conclusion, it is important to use the mass of the hydrated salt when calculating the percentage of water in a sample, as this will give a more accurate representation of the amount of water present. Using the mass of the anhydrous salt instead can lead to an underestimation of the percentage of water in the sample.

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An atom's radius is well under 1 nanometer, or one billionth of a meter.

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H2 and 02​ are the products of this chemical reaction because of the splitting of water molecule.

The products of this chemical reaction are H2 and 02​ because when the water molecule dissociates or splits hydrogen and oxygen molecules are formed. We know that water is produced from the combination of hydrogen and oxygen.

So we can conclude that H2 and 02​ are the products of this chemical reaction because of the splitting of water molecule.

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5,7 g/cm³

d = m/V

= 75.5g/13.25cm³

≈ 5,7 g/cm³

Answer:

C. and D. i think

Explanation:

We are unable to replace salt with sugar. Many soluble carbohydrates with a sweet flavour and that are used in food are collectively referred to as sugar.

In addition to fructose, simple sugars also go by the name monosaccharides. also galactose. Disaccharides or double sugars are other names for compound of carbohydrates. Rock salt, also known as carbohydrates, is a naturally occurring crystalline mineral that is made up mostly of sodium chloride (NaCl), a chemical molecule that is a member of the larger class of salts. In seawater, salt is found in enormous amounts.

Seawater, where it makes up the majority of the minerals, contains a significant amount of it. Animal life cannot exist without salt, and humans' basic tastes include saltiness.

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The concentration of bicarbonate ions decreases during metabolic acidosis due to the build-up of fixed acids.

Metabolic acidosis occurs when there is an imbalance between the production and excretion of fixed acids. This leads to an excess of fixed acids in the body, such as lactic acid and ketoacids. The excess fixed acids react with bicarbonate ions (\(HCO_{3}^{-}\)) to form carbonic acid (\(H_{2}CO_{3}\)). Carbonic acid then dissociates into water (\(H_{2}O\)) and carbon dioxide (\(CO_{2}\)), which is exhaled. As bicarbonate ions are used up in this process, their concentration decreases in the body.

Thus, bicarbonate ions combine with hydrogen ions to form carbonic acid, which then dissociates into water and carbon dioxide. When fixed acids accumulate in the body, they compete with bicarbonate ions for hydrogen ions, leading to a decrease in bicarbonate concentration and ultimately causing acidosis.

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A near-azeotropic refrigerant blend is a mixture of two or more refrigerants that have similar boiling points and vapor pressures, resulting in a composition that behaves like a single fluid. These blends are designed to offer improved performance and efficiency compared to single-component refrigerants.

Two examples of near-azeotropic refrigerant blends are R-410A and R-404A.

R-410A is a blend of difluoromethane (R-32) and pentafluoroethane (R-125), which has replaced R-22 as a popular refrigerant for air conditioning systems due to its superior efficiency and environmental properties.

R-404A is a blend of tetrafluoroethane (R-134a), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-143a), which is commonly used in commercial refrigeration applications such as supermarkets and convenience stores.

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Answer:

False, 17.03*10 = 170.3g not 17

There are 1.31 x 1022 bromide ions in 2.00 g of \(MgBr_2\).

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Answer:

eswl uses shock waves to break kidney stones into small pieces that can more easily travel through the urinary tract.

Explanation:

hope this helps

Answer:

Explanation:

The sketch of the curve for two Br atoms can be seen in the image attached below. From the image below, we can deduce the following:

On the periodic table, the Bromine (Br) atom is the fourth member in the halogen family group. The atomic size increases from top to bottom down the group, thus Br atom posses a larger atomic size than Cl atom. As a result of that, the bond length formation between the two Br atoms will be larger compared to that of the two Cl atoms.

In the given reaction  ₉₆²⁴⁶Cm + ₆¹²C ---> 4 ¹on + X  it shows an example of an artificial transmutation reaction.

An artificial transmutation reaction may resemble this. The method of causing nuclear reactions by blasting atomic nuclei with high-energy particles like ions or neutrons is referred to as artificial transmutation.

In this instance, the transmutation is induced by bombarding the carbon nucleus (C) with additional particles or a high-energy beam, resulting in the production of the following products: Element X and 4 1on (Helium-4)

Blasting an element with a basic particle, an element can be artificially transmuted into a different element.

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Answer:

21 =33

Explanation:

Given two objects, the object with the least mass will be pulled to the object with the most mass.

Answer:

the answer is simple the object with the lower mass would be pulled to the object with the bigger mass

Explanation:

hope i helped

Answer:

The answer is c( to send signals to control the body)

Answer:

c. To send signals to control the body.

Explanation:

. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning..

Answer:

This one seems tricky, but the answer is B.

Explanation:

The first answer choice is wrong because it only applies to volcanic mountains.

C. would be true for folded mountains and volcanic mountains, but not fault-block mountains. Fault-block mountains have steep slopes and jagged surfaces; hence why B is correct.

D. is wrong because it applies to all three types of mountains mentioned.

Really, volcanic mountains can have gentle slopes and steep slopes, as well as jagged appearances and dome-shaped appearances. All that has to be assessed is the characteristics of fault-block mountains. This would be described in answer choice B.

Answer:

\(\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}\)

Answer:

× = and

Explanation:

person and person

The volume of the sodium carbonate needed to precipitate is 31.248 ml. This is calculated using the dilution formula.

The molarity of the solution and the volume of the first solution can be correlated with the molarity and the volume of diluted solution. It is called as dilution formula.

Molar concentration is the another term for molarity. Molarity is a measure of the concentration of a chemical species in particular of a solute in a solution in terms of amount of substance per unit volume of solution.

The expression for molarity of the solution is,

M1 V1 = M2 V2

here we have 0.125 m sodium carbonate solution would be needed to precipitate the calcium ion from 37.2 ml of 0.105 m cacl2 solution.  

putting all the values we get,

0.105 * 37.2 = 0.125 * V2

V2 = 31.248

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Answer:

Inventing gadgets to make their work easier.

Protecting the country using bombs and guns.

Explanation:

Answer:

the attraction water molecules have to other surfaces

Explanation:

Adhesion is defined as  the attractive forces between unlike substances, e.g water moving up a capillary tube.

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).

So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.

Answer: D

Explanation: