Scientific Notation!!!!!

#9 b) PLEASE HELP!!!​

Answer:

0.179254 kilocalories

Explanation:

divide the energy value by 4184

[tex]0.179254[/tex] that would be your answer

Answer:

"They can be reversed by physical changes."

Explanation:

A chemical change can form a new substance, can be detected by the change in color and they have properties different from their starting materials.

Answer:

durage

Explanation:

durage just doesn't make sense compared to the other 3

Answer:

Origin of the substance

Explanation:

Origin of a substance doesnt affect toxicity but all other options do

Answer:

2 hydrogen

5 fluorine

1 boron

1 lithium

Answer:

yes

Explanation:

if u watch or look closely u will observe it

The CH₃ has resonance structures as it has odd number of hydrogen atoms.

In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures ,also variously known as resonance structures or canonical structures into a resonance hybrid (or hybrid structure) in valence bond theory. It has particular value for analyzing delocalized electrons where the bonding cannot be expressed by one single Lewis structure.

Thus,  CH₃ has resonance structures as it has odd number of hydrogen atoms.

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Answer:

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Answer:

If two atoms get close together then the electrons of each atom will get attracted to the other one and bc one atom lose electrons gets a positive charge and the one with more electrones will get a negetive charge

Explanation:

brailiest pls pls pls

Answer:

Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.

Explanation:

Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.

Answer:

Is letter B

Explanation:

Hope it helps :))

Answer:

Calcium (Ca) is in group 2 and period 4 on the periodic table be because Calcium has 2 valence electrons and 4 electron shell. Thus, calcium is a metal like all other group 2 element.

Explanation:

Answer:

Explanation:

First, calculate the molar mass of Aluminum Oxide (Al2O3), by multiplying the number of the constituent atoms, by their relative atomic abundances . Inserting the atomic masses into the equation gives you  . Then find the percent of Aluminum by mass, in Aluminum Oxide.  Finally, set up an equality, where 53.02% of the mass of Aluminum Oxide, is 999 grams of Aluminum

Answer:

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Answer:

C is the correct option.

Explanation:

When water reaches 100°C it starts evaporating and the molecules of water turns to vapor.

Answer:

Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. are physical properties. Properties that describe how a substance changes identity to produce a new substance are chemical properties. ... Physical and chemical properties can be used to classify a substance as ionic or molecular.

Answer:

Explanation:

sory i dont know

Answer:

Molar concentration of potassium hydroxide

= 0.27 Mol liter/approx

Answer:

pKa = - log Ka = - log (1.3 * 10^-4) = 3.886 5.20 mL of 6.20 M NaOH = 0.00520 L * 6.20 mole…

Explanation:

Answer:

Carbon-14

Explanation:

It's carbon, because the element has 6 proton.

It's not an ion, because there are same number of proton and electron 6=6

It is carbon-14 because 6 proton + 8 neutron = 14

Answer:

The change in energy for a chemical reaction has to do with the potential energy of the electrons. The change in energy for a nuclear reaction has to do with the potential energy of the nucleus. The change in energy for a nuclear change is many orders of magnitude larger than for a chemical change.

The statement that describes both nuclear and chemical changes occur is "potential energy."

Nuclear reactions include a change in the nucleus of an atom, which usually results in the production of a different element. Chemical reactions, on the other hand, require just electron rearrangement and no changes in nuclei.

A nuclear reaction is any reaction that causes the nucleus of an atom to change. An atom's nucleus is made up of protons and neutrons. It seems to reason that a nuclear reaction alters the amount of protons and/or neutrons in an atom.

Chemical changes occur when bonds between molecules or atoms are broken and/or formed to form a new material. In this case, the new substances' qualities differ from the old, the particles differ, and the number of particles can alter.

The change in energy for a nuclear change is many orders of magnitude greater than the change in energy for a chemical change.

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Answer:

Very High melting and boiling points.

Very Good Conductors of heat and electricity.

Malleable (can be made into different shapes without breaking)

Ductile (can be molded into wiring)

Explanation:

Answer:

Very High melting and boiling points

Very Good Conductors of heat and electricity

Malleable (can be made into different shapes without breaking)

Ductile (can be molded into wiring)

Metallic luster (shiny)

Sometimes magnetic

Explanation:

The order of increasing ionic property is;

WO3 < ZrS2 < MnS2< ZnS < MnS

Ionic compounds are compounds that contain an ion pair. Typically, ionic compounds are formed between metals and nonmetals.

The degree of ionic character depends on the type of metal involved and the magnitude of charge it carries.

Typically, first row transition metals form ionic compounds. The degree of ionic character depends on the row in which the metal is found and the magnitude of charge it carries.

Hence, the order of ionic character of the compounds from most ionic to least Ionic is; WO3 < ZrS2 < MnS2< ZnS < MnS.

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The Elephant Maximus is the species that was introduced and later became extinct on Maguindanao.

Extinction occurs as all members of a species die, and therefore the species disappears. This includes complete extinction or extinction of the species in a specific zone.

In the case of the Elephant Maximus, which is known as the Asian Elephant, this species became extinct in a region known as Maguindanao in the Philippines.

This partial extinction occurred as the elephants from this zone were taken to Sabah in Malaysia from the 13th century to the 16th century. This occurred because the Sultans of this region considered this elephant to be a valuable and even sacred animal.

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Answer:

Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.

Explanation:

Hope this help

Answer:

b and c since they bulge

Explanation:

Answer

0.16574

Explanation:

because why not

Answer:

the drops of liquid are coming from the decreases. they are formed as the motion of the water particles in the air gas. this change in motion cause air in the air to change from a liquid to a water

Hello there!

The drops of liquid are coming from the air. They are formed as the motion of particles in the air decreases. This change in motion causes water in the air to change from a liquid to a gas.

Hope this helps you!

~Just a joyful teen

[tex]SilentNature :)[/tex]

True. I am always sad but my heart is always happy cuz it knows there are good things ahead

Answer:

Both switches must be closed in order for the circuit to be complete and for the bulb to light. (This would indicate the 'armed' status of this burglar alarm.) Magnetic switches come in 2 varieties - "Normally Closed" and "Normally Open". These 2 terms describe the state of the switch when it is NOT being controlled by the magnet.

Explanation:

Answer:

1)

Explanation:

ok this is a write answer