Is the singular possessive noun of walrus is walrus’s?

Answer:

9.033×10^23 Molecules

Explanation:

We are given,

No.of moles of water = 1.5 moles

The approximate value of Avagadro's Constant =6.022×10^23 particles

Hence,

As we know that,

No.of particles = No.of moles × Avagadro's Constant

Here,

No. Of Water Molecules in 1.5 moles of water = 1.5×6.022×10^23

No.of Water Molecules in 1.5 molesof water=9.033×10^23 Molecules

Answer:

Law of conservation of matter

Explanation:

Answer:

C help stop bleeding

Explanation:

Platelets stop bleeding by clumping and forming plugs in blood vessel injuries

Answer:

it is an exothermic reaction

Answer:

c

Explanation:

8.4

For the reaction H₂SO₄ + 2NaC≡N → 2HC≡N + Na₂SO₄, we have that 8.4 moles of sodium cyanide are needed to produce 4.2 moles of sodium sulfate (option C).

The reaction between sodium cyanide and sulfuric acid is:  

H₂SO₄ + 2NaC≡N → 2HC≡N + Na₂SO₄

We can find the number of moles of sodium cyanide, assuming that it is the limiting reactant and knowing that 2 moles of it produce 1 mol of sodium sulfate, as follows:  

[tex] n_{NaC\equiv N} = \frac{2\: moles\: NaC\equiv N}{1 \: mol\: Na_{2}SO_{4}}*4.2 \: moles\: Na_{2}SO_{4} = 8.4 \: moles [/tex]  

Therefore, 8.4 moles of sodium cyanide are needed to produce 4.2 moles of sodium sulfate (option C).  

Learn more about limiting reactants here:

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Answer:

C

Explanation:

In the bone marrow, red blood cells are produced

Answer:

simplest explanation regarding CO2 Molecular Geometry and hybridization. ... Carbon is the least electronegative that means it stays at the center

Explanation:

hope this helps

Answer:

subsystems.

Explanation:

A self-contained system within a larger system. system. A group of interacting or interdependent elements forming a complex whole, as in all the factors or variables in an environment or all the variables that might affect a science experiment.

Answer:

a chemical change is correct answer

Answer:

B: Pineapple imported by air from Costa Rica

Explanation:

Embodied energy is the total energy that is required for the extraction, processing, manufacture and transportation of materials to its intended usage destination.

This means highest embodied energy will be the work that demands the most energy for extraction, processing, manufacture and transportation of materials to its intended usage destination.

Looking at the options given, the one with the highest embodied energy will be "Pineapple imported by air from Costa Rica". This is because other options are done locally and thus will consume lesser energy and processing time unlike the pineapple that is coming from another country and by air.

Answer:

EASY ITS BUILT DIFERENT

Explanation:

Answer:

The required numerical set up is;

RAM = (19.78% * 10) + (80.22% * 11)

Explanation:

The relative atomic mass is the sum of the products of the mass of each isotope and its relative abundance.

Hence the relative atomic mass of Boron is obtained form;

RAM = (19.78% * 10) + (80.22% * 11)

RAM = (1.978) + (8.8242)

RAM =10.8022

Answer:

0.32 g

Explanation:

First, we find the number of moles n of silver deposited.

n = m/M where m = mass of silver deposited = 1.08 g and M = Atomic weight of silver = 108 g/mol

n = m/M = 1.08 g/108 g/mol = 0.01 mol

Now, the quantity of electricity Q = nF where n = number of moles of silver = 0.01 mol and F = Faraday's constant = 96500 C/mol

Q= nF = 0.01 mol × 96500 C/mol = 965 C

By the chemical equation for copper,

Cu²⁺ + 2e ⇒ Cu

2 moles of electrons deposits 1 mol of copper, that is

2 × 96500 C deposits 1 mol of copper, then 965 C will deposit x mol

x = 1 mol × 965 C/2 × 96500 C = 1/200 mol = 0.005 mol of copper

So, we find the mass of 0.005 mol of copper using

n = m/M where m = mass of copper deposited = unknown and M = Atomic weight of copper = 63.54 g/mol and n = number of moles of copper = 0.005 mol

m = nM

= 0.005 mol ×  63.54 g/mol

= 0.32 g

Answer:

Newton's laws are very important because they tie into almost everything we see in everyday life. These laws tell us exactly how things move or sit still, like why you don't float out of bed or fall through the floor of your house.

Explanation: Newton's laws of motion are important because they are the foundation of classical mechanics, one of the main branches of physics. Mechanics is the study of how objects move or do not move when forces act upon them.

Answer:

D, the cardiovascular system

Explanation:

The Cardiovascular System is the system at which blood circulates through our body

Explanation:

every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force

Answer: Newton's 1st law of motion explains how things move and how forces work on their movement, which makes it an extremely important discovery.

Explanation: If we were to place an object into space, we could observe how it behaves without any external influences.

Answer/Explanation:

#1 - A pure substance is either an element or a compound, making it different from a mixture. A sample of matter that has specific chemical and physical properties is the only one that fits here.

#2 - A pure substance is either an element or a compound, making it different from a mixture. Water is a compound, and thus this would be true.

#3 - An atom is the smallest unit of an element that keeps the properties of that element. Just refer to its definition.

#4 - A molecule is two or more atoms held together by chemical bonds . Again, just refer to its definition.

#5 - A chemical bond is the attractive force that holds atoms together . Jus refer to its definition.

#6 - Molecules are most definitely not all the same size, especially given the huge number of them. This would be false.

#7 - A compound is a pure substance made up of two or more different types of atoms joined by chemical bonds . Just refer to its definition.

#8 - Compounds always form in a fixed ratio, so this would be false.

#9 - If by directly, the problem means with the naked eye, this would be true.

#10 - False. It's reversed.

#11 - A crystal is a substance in which the particles are arranged in an orderly, geometric, and repeating pattern . Just refer to its definition.

#12 -True; to be more specific, they are covalent network solids.

Answer:

Posses both metal and non metal property

This question most likely has answer choices. The answer choices are as follows:

The answer is Metalloids are semiconductive (2nd option).

Answer:

0.288 mole of Fe.

Explanation:

We'll begin by calculating the number of mole present in 23.00g of iron(III) oxide (Fe2O3). This can be obtained as follow:

Mass of Fe2O3 = 23 g

Molar mass of Fe2O3 = (56×2) + (16×3)

= 112 + 48

= 160 g/mol

Mole of Fe2O3 =?

Mole = mass /Molar mass

Mole of Fe2O3 = 23 / 160

Mole of Fe2O3 = 0.144 mole

Next, we shall write the balanced equation for the reaction. This is given below:

2Al + Fe2O3 —> Al2O3 + 2Fe

From the balanced equation above,

1 mole of Fe2O3 reacted to produce 2 moles of Fe.

Finally, we shall determine the number of mole of Fe produced by the reaction of 23 g (i.e 0.144 mole) of Fe2O3. This can be obtained as illustrated below:

From the balanced equation above,

1 mole of Fe2O3 reacted to produce 2 moles of Fe.

Therefore, 0.144 mole of Fe2O3 will react to produce = 0.144 × 2 = 0.288 mole of Fe.

Thus, 0.288 mole of Fe is obtained from the reaction.

Answer:

The value is   [tex]k = 2 \ ppb[/tex]

Explanation:

From the question we are told that

   The volume of the drinking water is  [tex]V = 500 \ mL = 500 *10^{-3} \ L = 500 *10^{-6} \ m^3[/tex]

   The mass of  mercury it contains  [tex]m_c = 0.001 \ mg = 0.001 *10^{-3} \ g = 0.001 *10^{-6}\ kg[/tex]

Generally the mass of water is mathematically represented as

       [tex]m = V * \rho[/tex]

Here [tex]\rho[/tex] is the  density of water with value  [tex]\rho = 1000 \ kg/m^3[/tex]

So

       [tex]m = 500 *10^{-6 }* 1000[/tex]

=>    [tex]m = 0.5 \ kg[/tex]

Generally  ppb mean part per billon ,  and  1 billon is  100,000,000

So the part per billon which this represents is mathematically represented as

        [tex]k = \frac{0.001 *10^{-6}}{ 0.5} * 100 000 000[/tex]

=>     [tex]k = 2 \ ppb[/tex]

Answer:

2 ppb

Explanation:

I got it right in class!

Hope this Helps!! :))

Answer:

B) fewer in number and less strongly held

Explanation:

If we  look closely at the periodic table from left to right, we will notice that the number of valence electrons increases steadily as we move across the periodic table from left to right.

Metals are mostly at the left hand side of the periodic table while nonmetals are found at the righthand side of the table.

Metals are less electronegative than nonmetals and typically have a lower effective nuclear charge than nonmetals hence the fewer valence electrons of metals are less strongly held(due to less effective nuclear charge) than those of nonmetals.

Answer:

0.97 atm ≅ 1 atm

Explanation:

The relation between the pressure (P) and volume (V) of a gas is given by the Boyle's law. According to this, the volume is inversely proportional to the pressure:

P₁ x V₁ = P₂ x V₂

From the problem, we have:

V₁= 400.0 mL x 1 L/1000 mL = 0.4 L

P₁= 5.2 atm

V₂= 2.14 L

We calculate the final pressure (P₂) from the equation, as follows:

P₂ = (P₁ x V₁)/V₂ = (5.2 atm x 0.40 L)/ 2.14 L = 0.97 atm ≅ 1 atm

Therefore, as the volume is increased (from 0.4 L to 2.14 L), the pressure in decreased (from 5.2 atm to 0.97 atm).

A 400.0-mL can contains compressed gas at 5.2 atm. The gas is sprayed into a bag, that inflates to 2.14 L at 0.97 atm.

Boyle's law states that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.

A 400.0-mL can contains compressed gas at 5.2 atm. The gas is sprayed into a bag, that inflates to 2.14 L. We can calculate the final pressure of the gas using Boyle's law.

P₁ × V₁ = P₂ × V₂

P₂ = P₁ × V₁ / V₂

P₂ = 5.2 atm × 0.4000 L / 2.14 L = 0.97 atm

where,

A 400.0-mL can contains compressed gas at 5.2 atm. The gas is sprayed into a bag, that inflates to 2.14 L at 0.97 atm.

Learn more about Boyle's law here: https://brainly.com/question/469270

Answer:

The picture?

Explanation:

Please the picture

This makes no sence. Please put the picture up for us to answer. Thanks!

Answer:

2 and 3 only

Explanation:

The formular for the compound; Silicon(IV)oxide is SO2

1. Silicon atoms form four single bonds in silicon(IV) oxide.

This statement is wrong because the silicon is doubly bonded to two oxygen atoms.

2. Oxygen atoms form two double bonds in silicon(IV) oxide.

This statement is correct.

3. Silicon(IV) oxide has a high melting point.

This statement is correct Due to it's macromolecular structure, it is able to form thousands of covalent bonds between it's sulphur and oxygen sub units.

4. Silicon(IV) oxide contains one silicon atom and four oxygen atoms.

This statement is wrong as silicon(iv) oxide contains only two oxygen atoms.

Answer:Phosphorus ahs an ocxidation number of 3. Phosphoric acid, H3PO3 has structure where there is one hydrogen (-H), two hydroxyl groups (-OH) and one oxgen (=O) attached to the central phosphorus P

Using the normal rules, H= +1, O = -2, OH = -1 and balancing out the "charges" we get P =+3

Explanation:

Answer its Ccccccccccccccccccccccccc

The volume of apple juice could  a diabetic person drink : 100 ml

Given

sugar allowance = 8 g

sugar concentration of apple juice : 8.0% w/v

Required

Volume of apple juice

Solution

The concentration of a substance can be expressed in several quantities The concentration shows the amount of solute in a unit of the amount of solvent.

% w/v = mass of solute (weight) in g / 100 ml solution

So for 8% w/v = 8 g of sugar(solute) in 100 ml of apple juice