please help me figure out which has 3 significant figures

Answer: Energy is transferred from reactants to products .

Explanation: Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Reactants are your starting point, and products are your result.

Answer:

4 ClO-

Explanation:

Bond length ∝ 1/ Bond order

Bond order of ClO − =1,

Bond order of ClO 2− =1.5,

Bond order of ClO 3− =1.66 ,

Bond order of ClO 4− =1.75.

Thus the order of bond length is

ClO 4− <ClO3− <ClO2−

<ClO −

Answer:

Every atom of an element will have the same number of protons

Explanation:

Protons are used to identify an element because every atom of an element will have the same number of protons.

I am not sure why your teacher isn't asking for the layers, but here is the list of layers;

A -(topsoil) Mostly minerals from parent material with organic matter incorporated. A good material for plants and other organisms to live.

E - (eluviated) - Leached of clay, minerals, and organic matter, leaving a concentration of sand and silt particles of quartz or other resistant materials – missing in some soils but often found in older soils and forest soils.

B - (subsoil) Rich in minerals that leached (moved down) from the A or E horizons and accumulated here.

C - (parent material) The deposit at Earth’s surface from which the soil developed.

R - (bedrock) A mass of rock such as granite, basalt, quartzite, limestone or sandstone that forms the parent material for some soils – if the bedrock is close enough to the surface to weather. This is not soil and is located under the C horizon.

Answer:

The answer is A

Explanation:

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The force helps food move through the large intestine during digestion is muscle contractions exert a pushing force on the food. Thus option A is correct.

Force is defined as a push or pull upon any object resulting from the object's interaction with another object. It is a vector quantity.

Force can also be defined as an external cause that, when applied, changes or tends to change the state of the body, if the body is in motion.

Force is expressed as

Force = mass x acceleration

There are five types of force

Digestion is define as the breakdown of food into smaller component  that can be absorbed into blood streams.

Thus, the force helps food move through the large intestine during digestion is muscle contractions exert a pushing force on the food. Thus option A is correct.

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Answer:

i dont have a answer im just answering so you can give the person who answered brailiest :)

Explanation:

Answer:

Ring is made up off copper.

Explanation:

Given data:

Mass of ring = 89.2 g

Volume of water = 10 mL

Volume of water + ring = 20 mL

Ring is made up of = ?

Solution:

Volume of ring = (Volume of water + ring) - Volume of water

Volume of ring = 20 mL - 10 mL

Volume of ring = 10 mL

Density:

Density = mass/volume     ( 1 mL = 1 cm³)

d = 89.2 g/  10cm³

d = 8.92 g/cm³

Thus, ring is made up off copper.

Answer:

There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom. All other stable atoms contain some number of neutrons. hope this helps you :)

Answer: Silver

Explanation:

Answer:

SILVERRRRRRRRRRR

Explanation:

Answer:

A inside the nucleus

Explanation:

All the protons (and neutrons) in an atom belong in the nucleus of an atom. Only the electrons of an atom stay in orbit.

Answer:c

Explanation:

Answer:

formula units

Explanation:

[tex]$KClO_3$[/tex]  is  potassium chlorate. It is an ionic compound containing potassium, chlorine and oxygen. The ion in potassium chlorate are held together by the ionic bonds in the lattice structure.

A representative particle may be defined as the smallest unit for which the substance exists in its natural form. For most of the elements, atom is the representative particle. Molecule is the representative particle for diatoms and molecular compounds. But for ionic compounds such as  [tex]$KClO_3$[/tex] , NaCl, etc. . the representative particle is its formula units.

Answer:

B. an alkene

Explanation:

pentene has 5 carbons and 10 hydrogen atoms and one double bond

Answer:

1.91×1021/6.023×10^23

Explanation:

need thanks and make me brainiest if it helps you

Answer:

I hope this helped you.

Explanation:

A: 1

B: 3

C: 3

D: 3

E: 5

F: 5

Answer:

A 65-kg object and an 75-kg object.

Explanation:

The gravitational force is given by :

[tex]F=G\dfrac{m_1m_2}{r^2}[/tex]

F is directly proportional to the product of masses and inversely to the distance between them.

In this problem, the distance separating the objects is same for each pair. We need to find the greatest gravitational force between them.

(1) a 50-kg object and an 80-kg object

[tex]F_1=G\dfrac{4000}{r^2}\ N[/tex]

(2) a 65-kg object and an 65-kg object

[tex]F_2=G\dfrac{4225}{r^2}\ N[/tex]

(3) a 65-kg object and an 75-kg object

[tex]F_3=G\dfrac{4875}{r^2}\ N[/tex]

(4) a 60-kg object and an 70-kg object

[tex]F_4=G\dfrac{4200}{r^2}\ N[/tex]

From the above calculations we find that if the product of masses is maximum, it lead to maximum gravitational force between objects. Hence, a 65-kg object and an 75-kg object will have maximum gravitational force between them.

Answer:

acids and bases cancel each other out. acids increase H+ ions while bases release H+ ions

Explanation:

Answer:

1. it has more valence shells

2. its position in the periodic table is lower than Be

3. its bigger in atomic mass

Explanation:

=)

Answer:

i just ad the same question and but i fon know what ther answrr ied so i cant hep you but i had he smae question on rge mdhfyqf

Explanation:

The correct answer for this question is Decreases.

How quickly or slowly a reaction proceeds is known as the rate of reaction or speed of reaction for a reactant or product. As the reaction progresses, the rate of reaction slows because the initial concentration of the reactants is high, but as time goes on, this concentration falls, making the reaction slower. As a result, the rate of reaction is dependent on concentration and diminishes over time.

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Answer:

129.8 grams

Explanation:

Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry

You multiply mols x Molecular weight.

So

3.32x 39.1= 129.8 grams

60 mL volume of 0.25M KOH was needed to neutralize 10 mL of 0.50 M H3PO4.

The balanced reaction for the reaction of KOH and H3PO4 is shown below.

3KOH + H3PO4 → K3PO4 + 3H2O

mol of H3PO4 = (0.50 M) * (10 mL) * (1 L/1000 mL) = 5x10-3 mol

The number of moles of KOH needed to neutralize H3PO4 will depend on their stoichiometric ratio.

moles KOH = mol H3PO4 * (3 mol KOH / 1 mol H3PO4)

moles KOH = 5x10-3 mol * (3 mol KOH / 1 mol H3PO4)

moles KOH = 1.5X10-2 mol

mol of KOH = (concentration KOH)(volume KOH)

volume KOH = mol KOH / concentration KOH

volume KOH = 1.5 x 10 -2 mol / 0.25 M

volume KOH = 0.06 L or 60 mL

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Like charges repel while the unlike charges attract.

Electrostatics has to do with the interaction that does occur between charges. We know that a charge is a specie that has an imbalance in the number of electrons that it contains. The substance is positively charged if it contains less electrons and more protons. The substance is negatively charged if it contains more electrons and less of protons.

In either case, the interaction that exist between particles could be an attractive one or a repulsive one. It is regarded as the first law of electrostatics that like charges repel while the unlike charges attract.

Hence when we look at the table, a negative charge would repel another negative charge, a positive charge would repel another positive charge but a positive or a negative charge would attract a charge of opposite sign. The interaction that is possible between the charges is given by Coulombs law.

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An empty beaker weighs 34.49 g. when completely filled with water, the beaker and its contents have a total mass of 299.25 g. Volume does the beaker hold 264.76 mL.

mass of water = total mass - mass of beaker

mass of water = 299.25 g - 34.49 g

mass of water = 264.76 g

density of water = mass / volume

volume = mass / density

V = 264.76 g / 1.00g/mL

V = 264.76 mL

A physical body's overall composition is measured by its mass. This term also measures inertia, or the body's resistance to acceleration when a net force is applied. The strength of an object's gravitational pull to other bodies is also influenced by its mass. The kilogram serves as the SI's fundamental mass unit.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{7.1 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 117.940199...[/tex]

We have the final answer as

Hope this helps you

Answer:

Number of moles = 3.82 mol

Explanation:

Given data:

Number of moles of CO₂ = ?

Mass of CO₂ = 168.2 g

Solution:

Number of moles = mass/molar mass

Molar mass of CO₂ = 44 g/mol

By putting values,

Number of moles = 168.2 g/ 44 g/mol

Number of moles = 3.82 mol

Answer:

Did you put that in right because i've never heard of a compound called that nor is there a compound called that on the internet

Explanation:

You must of put that in wrong