Write the chemical formula of the following:
(1) Calcium hydroxide.
(2) Magnesium hydroxide.
(3) Aluminum sulphate.
(4) Sodium carbonate.
(5) Zinc phosphate.
(6) Lithium nitrate.
(7) Copper carbonate.
(8) Potassium carbonate.
(9) Magnesium sulphate.
(10) Calcium phosphate.

Answer:

four

Explanation:

i said so

Answer: The box is moving downward with increasing speed.

Explanation:

The diagram models the forces acting on a box. 2N 2N- Box - 2 N 5 N .The box is moving downward with increasing speed best describes the motion of the box.

The normal force acting on the box is equal to and opposite to its weight. This term equals the force of gravity when the box is on a level surface. To calculate the normal force of the box, use our given mass and gravity's acceleration.

When an object interacts with another object, it experiences a push or pull that causes it to change state, either from rest to uniform motion. It is a magnitude and direction vector quantity.

A representation of the forces acting on the object. The object is represented by a dot, and forces are represented by arrows pointing away from the dot. Force diagrams are another name for them.

Thus, The box is moving downward with increasing speed best describes the motion of the box.

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An electron domain consists of ; All of the above options  i.e.  a ) nonbonding pair of electrons   b) a single bond     c) a multiple bond.

An Electron domain is the number of bonded locations ( lone pair or bonded ) found around an atom. and the bond location is independent of the type of bonding existing between atoms in a molecule.

Electron domain are also known as electron groups. the types of electron domain are ; nonbonding pair of electrons and bonded atom.

Hence we can conclude that An electron domain consists of ; nonbonding pair of electrons,  a single bond and  a multiple bond.

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Sebastian's measured pulse rate is 3600 ml at rest, with a vital capacity of 600 ml and an inspiratory volume of 2000 ml. His tidal volume is 1800 ml while his reserves for expiration was 900 ml while he was exercising. His vital capacity during exercise ranged from 500 to 3000 ml.

The space covered within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity. The total square footage an object occupies in three dimensions is indicated by its volume. The term "capacity" indicates something's ability to contain, absorb, or receive by an item (such as a solid substance, gas, or liquid).

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The complete reaction can be written as -

3CoCl₂ + 2K₃PO₄ = 6KCl + Co₃(PO₄)₂

This is a precipitation reaction and the type of bonding involved in each of these compounds is ionic bonding.

A precipitation reaction is a chemical reaction occurring in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt.

Precipitation reactions also play a central role in many chemical analysis techniques, including spot tests used to identify metal ions and gravimetric methods for determining the composition of matter.

The compounds involve ionic bonding that occurs through transfer of electrons.

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Answer:

A condensation reaction is a class of organic addition reaction that typically proceeds in a step-wise fashion to produce the addition product, usually in equilibrium, and a water molecule.Hydrolysis is any chemical reaction in which a molecule of water ruptures one or more chemical bonds.

Different:

A condensation reaction that occurs between two separate molecules is called intermolecular condensation. ... The opposite of a condensation reaction that releases a water molecule is called a hydrolysis reaction. This happens when one molecule is split into two via the addition of a water molecule.

Answer:

1. a) Crystalline hydrated salt lose their mass or moisture on exposure to the air and change into amorphous salt, the phenomenon is called efflorescence.

b) Two salts that x could be are gypsum (Caso4.H2O) and copper (II) sulfate (CuSO4.H2O).

Gypsum (Caso4.H2O) form anhydrite(CaSO4), when exposed to air and copper (II) sulfate (CuSO4.H2O) form a white layer of anhydrous copper (II) Sulfate when expose to sir.

2. a) Salt hydrolysis is defined as the ions from salts react with water and form either basic or an acidic solution.

b) Two examples of salts that produce alkaline solutions when dissolving in water are sodium bicarbonate (NaHCO3) and Calcium Carbonate (CaCO3).

Lakes and polar ice caps are similar such that both are freshwater reservoirs. Option D.

Freshwater reservoirs are parts of the earth where freshwaters are found either in liquid or frozen forms.

Even though about 71% of the earth is water, about 97% of this water is not fresh. They are mainly salt waters that will require some form of processing before they can become fresh or usable.

The remaining 3% may be fresh, but about 69% of it is in frozen forms such as glaciers and polar ice caps. Other sources of freshwaters include lakes, reservoirs, ponds, rivers, streams, wetlands, and even groundwater.

In other words, lakes and polar ice caps may differ, but they are both similar in that both represent a source of freshwater.

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Answer: The molarity of the K2CO3 solution is 0.625 M.

Explanation: To find the molarity of a solution, you need to know the moles of solute and the volume of the solution in liters. Here's how to solve the problem:

Calculate the moles of K2CO3 using its given mass and molar mass:

moles = mass / molar mass = 93.1 g / 136.21 g/mol = 0.682 mol

Calculate the volume of the solution in liters:

volume = 1.09 L

Calculate the molarity of the solution using the moles and volume:

molarity = moles / volume = 0.682 mol / 1.09 L = 0.625 M

The conversion factors to the conversions that they would be used for as follows:

1.moles/grams ⇒ d. mass to mole

2.grams/moles ⇒ a. mole to mass

3.atoms/grams ⇒ e. mass to atom

4.moles/atoms ⇒ c. atoms to mole

5.atoms/moles ⇒ b. moles to atoms

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

Thus, The conversion factors to the conversions that they would be used for moles/grams ⇒ mass to mole.

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Answer:

d. never alters

Explanation:

physical is how it looks, not its chemical makeup... good luck bro :)

The density of magnesium is 1.738 g / cm³. The unit cell length is 4.800 × 10² pm. The atomic radius of the Mg in picometers  1.69  × 10²  pm .

The density of the magnesium   = 1.738 g / cm³

The edge length of the cell = 4.800 × 10² pm

The expression for the atomic radius is as follows :

r = √2a / 4

r = √2 × 4.800 × 10² / 4

r = 1.69  × 10²  pm

Thus, The atomic radius of the Mg in the picometers is  1.69  × 10²  pm  with the edge length of 4.800 × 10² pm .

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Answer:

-415.48°F (-248.60°C)

Explanation:

hoped this helped! <3 A brainiest is always appreciated! if this helped give a thanks and rating, i always try to reply to comments! have a nice day :)

Answer:

0.118 mol of gas and has a volume of 2.57 l . part a if an additional 0.122 mol of gas is added to the balloon (at the same temperature and pressure), what will its final volume be

Explanation:

688

Answer:

The presence of 1-2% ethanol as catalyst, suppresses the oxidation of chloroform with oxygen to give a poisonous gas called phosgene. ... Here glycerol acts as negative catalyst. Criteria or characteristics of catalysts. i. The mass and chemical composition of catalyst should remain unchanged at the end of the reaction.

Explanation:

According to the VSEPR model, the electron-pair arrangement of the central atom in BH₃ is predicted to be trigonal planar.

VSEPR stands for Valence Shell Electron Pair Repulsion. It is a model used in chemistry to predict the shape of individual molecules based on the extent of electron-pair electrostatic repulsion. It is founded on the Lewis structure theory of bonding, which describes electron pairs as lone pairs and bonds. Furthermore, VSEPR is based on the idea that electrons repel one another because they are negatively charged.

The electron-pair arrangement of the central atom in BH₃ is predicted to be trigonal planar by the VSEPR model.

BH₃ is a boron atom bonded to three hydrogen atoms. Boron has three valence electrons, but it requires six valence electrons to satisfy the octet rule. This means that boron has a vacant p orbital that it can use to form a molecule. The three hydrogen atoms are covalently bonded to the boron atom, with each hydrogen atom sharing one electron pair with the boron atom.

Based on this electron-pair arrangement, the VSEPR model predicts that the molecule will have a trigonal planar geometry. This means that the three hydrogen atoms will be positioned around the boron atom at the corners of an equilateral triangle. This arrangement causes the electron pairs in the valence shell to be as far apart as possible, resulting in a repulsion-free arrangement that is energetically stable.

Thus, the structure of  BH₃  will be a trigonal planar.

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The solubility product of Calcium Carbonate is 15mg/l hence is insoluble in water and the water is under-saturated with respect to calcium.

Calcium Carbonate is only slightly soluble in water. The solubility product is 4.4 × 10⁻⁹, indicating that if equal concentrations of calcium and carbonate are formed only 6.8mg/l of calcium carbonate would be soluble. Thus determined by the data, the water saturation with respect to calcium is under-saturated.

Langelier Saturation Index Complex (LSI) is the indicator of the degree of saturation of calcium carbonate in water.  The under-saturated water effect is the result of the Langelier Saturation Index Complex(LSI) that is negative, hence states that there will be corrosion of pipings.

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The final volume : 807.69 cm³

Given

Initial volume : 840 cm³

Initial pressure : 750 mmHg

Final pressure : 780 mmHg

Required

The final volume

Solution

Boyle's Law  

At a fixed temperature, the gas volume is inversely proportional to the pressure applied  

\(\tt p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}\)

Input the value :

V₂=(P₁V₁)/P₂

V₂=(750 x 840)/780

V₂=807.69 cm³

There are 1000 millimeters in a meter. To convert 161 millimeters to meters, we need to divide by 1000:

161 millimeters ÷ 1000 = 0.161 meters

Therefore, 161 millimeters is equal to 0.161 meters.

In the reaction for the synthesis of Luminol, the component of the blood mimic solution that is similar to real blood's ability to react with oxygen is hydrogen peroxide.What is the synthesis of luminol Luminol is an organic compound with the formula .

It is a white-to-pale-yellow crystalline solid that is insoluble in water but soluble in most polar organic solvents. When exposed to an oxidizing agent, it emits a bright blue glow. The components of the blood mimic solution are hydrogen peroxide, potassium ferricyanide, and sodium hydroxide.

Hydrogen peroxide is used in the blood mimic solution to imitate the oxidative properties of real blood. When blood is exposed to oxygen, the iron in hemoglobin is oxidized, producing the characteristic blue-green color of luminol. As a result, hydrogen peroxide is used in the blood mimic solution to provide an oxidizing agent that can react with the luminol and produce a visible blue glow.

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D) CH3OH

Base is chemical which have hydroxide ion. so CH3OH is base

Answer:

In the backrest use materials where it is easy to clean and where they do not absorb fluids, in this way it would be cooler, such as an ecological leather simulator.

And in the armrest as well, but in both areas we must not rule out that if or if it should have even a minimum of padded surface so that the patient or the person who spends most of the day in the wheelchair does not suffer from joint pain.

Explanation:

Some wheelchair factories also implement modern chairs where they are made of stainless steel structures lined with padded material with perforated fabrics that allow breathing and aeration of body areas that have contact with the fabric.

NaCl is correct answer of your question

Answer:

NH4OH

Explanation:

BCOZ IT IS PRESENT IN 15th GROUO WHICH NON METAL

Answer:

It would be able to function because the ph of the environment is similar to that of intestine.

Explanation:

The pH of the small intestine is eight. The enzyme would be able to function because enzyme C functions best at a Ph range around 8.

A binary covalent bond exists between 2 nonmetals.

These compounds are termed similarly to binary ionic compounds even though they don't contain ions.

These guidelines apply to the nomenclature of binary covalent compounds:

The complete name of the first element in the formula is given first.

The name of the second element refers to it as an anion.

Prefixes are employed to indicate the number of atoms in a compound. The prefix mono- is dropped if the first element only has one atom.

For instance, carbon monoxide is the name given to CO rather than monocarbon monoxide.

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Answer:

See explanation

Explanation:

Even though the options were not stated in the question, it is clear that the prediction required must reflect the stated fact that the sublimation temperature of CO2 is -78.5°C. This is the fact that was observed in the cause of the experiment. Hence any of the options that reflects this statement must be the correct option among the list of options available in the question.

1) To react with 0.460 mole of SO₂, 1.15 moles of C are needed.

2) When 2.0 moles of C reacts, 1.6 moles of CO are produced.

3) To produce 0.35 mole of CS₂, 0.70 moles of SO₂ are required.

4) When 2.4 moles of C reacts, 0.48 moles of CS₂ are produced.

1.

From the balanced equation, the stoichiometric ratio between C and SO₂ is 5:2. Therefore, to calculate the moles of C required, we can set up a proportion:

(5 moles C / 2 moles SO₂) = (x moles C / 0.460 moles SO₂)

Solving for x, we find:

x = (5/2) × 0.460 = 1.15 moles C

2.

From the balanced equation, the stoichiometric ratio between C and CO is 5:4. Therefore, to calculate the moles of CO produced, we can set up a proportion:

(5 moles C / 4 moles CO) = (2.0 moles C / x moles CO)

Solving for x, we find:

x = (4/5) × 2.0 = 1.6 moles CO

3.

From the balanced equation, the stoichiometric ratio between SO₂ and CS₂ is 2:1. Therefore, to calculate the moles of SO₂ required, we can set up a proportion:

(2 moles SO₂ / 1 mole CS₂) = (x moles SO₂ / 0.35 moles CS₂)

Solving for x, we find:

x = (2/1) × 0.35 = 0.70 moles SO₂

4.

From the balanced equation, the stoichiometric ratio between C and CS₂ is 5:1. Therefore, to calculate the moles of CS₂ produced, we can set up a proportion:

(5 moles C / 1 mole CS₂) = (2.4 moles C / x moles CS₂)

Solving for x, we find:

x = (1/5) × 2.4 = 0.48 moles CS₂

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Explanation:

Metal is a better conductor than wood, so a metal spoon could burn

Paul's hand.  So, Sue is incorrect. The metal being good conductor of heat, heats up faster than wood spoon and thus, could burn Paul's hand.