Answer:
wow never heard the question
18. What is the volume of these gases at STP?
a. 3.20 x 10 mol CO2
b. 3.70 mol NH2
C. 0.960 mol CH4
Answer:
B 3.70 mol NH2
Explanation:
Answer:
A. 0.0717 L
B. 82.9 L
C. 21.5 L
If yuo put hand sanitizer in a bottle, light a match, drop it in the bottle, what will happen?
Answer: As hand sanitizer dries, it evaporates into gas, which can also catch fire. That’s why the experts recommend that people avoid lighters, matches and fires after using hand sanitizer.
Explanation:
Explanation:
A medida que se seca el desinfectante de manos, se evapora en gas, que también puede incendiarse. Es por eso que los expertos recomiendan que las personas eviten los encendedores, fósforos y fuegos después de usar desinfectante para manos.
Which substance tends to form anions when bonding with other elements?
oxygen
calcium
argon
sodium
Answer:
A) Oxygen
Explanation:
i just took the test.
If an atom has four electrons in the outer energy level, how will it form a bond?
A. It will gain electrons.
B. It will share electrons.
C. It will not form a bond.
D. It will lose electrons.
Answer:
b . Thunder formed between carbon atoms and other elements because carbon has four valence electrons it made take for Coral Bell and funds to obtain a complete outer energy level.
what is the technique for measuring the heat change for a reaction called?
Answer: calorimetry
Explanation: calorimetry: the measure of the amount of heat involved in a chemical or physical process.
why does the reaction of anthracene with maleic anhydride needs to be kept away from water?
Answer:
Water separates the two reactants into two layers, stopping the reaction.
Explanation:
Maleic anhydride can and will react with water.
The reaction between maleic anhydride and anthracene is a Diels Alder reaction. This type of reaction is a cycloaddition reaction.
What is Diels Alder reaction?The Diels Alder reaction is a member of a class of reactions called cycloadditions. This reaction involves three pi bonds, two from the diene and one from the dienophile in a concerted reaction to give a six-membered ring.
Since this reaction involves four pi electrons in the diene and two pi electrons from the dienophile, it is sometimes referred to as a 4+2 cycloaddition.
The presence of electron donating groups on the diene and the electron withdrawing groups on the dienophile favors normal Diels Alder reactions. The reaction involves the formation of new σ bonds which are energetically more stable than π bonds.
Anthracene can react with water, breaking the center ring. Maleic anhydride can react with water, opening its ring. The reactants get seperated into two layers by water and thereby stops the reaction.
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Read the following paragraph from the section "Dreaming Of A World Deep Below."
The interior of our planet has long held a fascination for philosophers and storytellers. Some have speculated that another inhabited world lies beneath our own. In 1864, Jules Verne’s novel "Journey to the Center of the Earth" described the fictional adventures of explorers traveling under our planet’s surface. It was a best-seller. People wondered if the world Verne described below our own could be real.
Why does the author include this paragraph in the article?
Question 9 options:
to show how much scientific progress regarding the Earth's core was made during Lehmann's lifetime
to explain a number of popular theories concerning the composition of the Earth's core
to demonstrate how Lehmann's discovery confirmed what Jules Verne already knew about the Earth's core
to describe the attitudes Lehmann needed to overcome in order to introduce her work to the scientific community
Answer:
B
Explanation:
The interior planet has fascinated a lot of people so a lot of theories have been made about what's in there.
The reason author include this paragraph in the article is to explain a number of popular theories concerning the composition of the Earth's core. Thus, option B is correct.
What is acronym?
Acronym has been defined as the short form of long words such as very important person and the acronym of very important person has been VIP. The word acronym has been used to denote the short term of the word in which two or more than two words combined together to form new short word.
Acronym always starts with capital latter and the first word's letter is always capital. Capitalization has been the most important part of the writing as it has the rule of writing that the first latter of the word that starts a sentence must be capital or starts with capital latter.
The sentence has a group of sensible or meaningful word that combines together to form a complete and senseful sentence. The sentence has of several type such as positive sentence, negative sentence, exclamatory sentence as well as introgative sentence.
Therefore, The reason author include this paragraph in the article is to explain a number of popular theories concerning the composition of the Earth's core. Thus, option B is correct.
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at the end of the isomerization reaction, what chemical is used to quench the residual bromine?
Answer:
They are constitutional isomers and diastereomers.
A formula unit represents the simplest ratio of elements in a
Answer:
formula unit
Explanation:
formula unit represents the simplest ratio of elements.
20.What is it called when particles in a solid or liquid move slower and closer
together?
Answer: freezing
Explanation:
when the atoms or molecules in a solid or liquid are moving slower and closer together, it is called brrrrrrrrr freezinf
I will brainless who can answer this all pleaseeeeejvv
Answer:
White-Blue-Red-Yellow-Orange
Explanation:
The sun emits all colors of the rainbow more or less evenly.
⚠️ I'm not 100% sure but for sure there is White ⚠️
the _____ of an object is where the object is in relation to another object or points of reference. A motion B force C gravity D position
d position
position is the reference for the points of the object
In San Diego (elevation 15 feet), you
step on a scale and weigh 115
pounds, using the same scale in
Denver, Colorado (elevation 5,280
feet) you would weigh
A. more than in San Diego
B. less than in San Diego
C. the same as in San Diego
Answer: b
Explanation:
It will weigh less than in San Diego. So, the correct option is (B).
What is Elevation?The elevation of a geographic location is defined as its height above or below a fixed reference point known as a geoid which is a mathematical model of the Earth's sea level as an equipotential gravitational surface.
Height is defined as the vertical distance of a point on a horizontal surface while Elevation is the height of a point above (or below) sea level.
As the Elevation is higher, the weight will be less, whereas if the Elevation is less, then the weight will be more. For example, the elevation in San Diego is 15 feet, so the weight is 115 pounds, while the elevation in Denver, Colorado, is 5,280 feet, so the weight would be less than 115 pounds.
Thus, it will weigh less than in San Diego. So, the correct option is (B).
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If a substance has a mass of 0.00235 grams and you need the mass in milligrams, will the number appear to become smaller or larger
A school bus travels 270 km in 6 hr. What is its average speed for the trip in km/hr?
Answer:
45km/hr
Explanation:
270/6=45
Do you have more human cells or
bacteria cells in your body?
How would you change liquid water into ice? Be sure to explain what is happening to the energy (the heat)
Answer:
By putting the liquid water in the fridge
Explanation:
When it is solid the heat will melt to liquid water and if you put it inside a boiling kettle if it boil finished it will bring out gas,if you open it the cover of the kettle you see water if you put it in the fridge and it will be solid again.
Someone pls help me I will make you brain
Answer:
less methane
Explanation:
methane is increasing because of global warming
What causes the liquid in a thermometer to rise?
Answer:
The level of colored liquid rises when the thermometer is placed in hot water. Heat causes the molecules of the liquid to get farther apart. The molecules of the liquid break down into atoms and take up more space.
Explanation:
Is fresh squeezed lemonade a homogeneous or heterogeneous mixture
Answer: This makes the lemonade a homogenous mixture
Explanation:
If the freshly squeezed lemonade is made by squeezing lemons to extract the sour juice and mixing this with water and sugar all the substances in the mixture finally created are in the same phase.
guys help plz I need it
Answer:
may be the answer will be study the structure of the earth and resources.
Based on location in the periodic table, which element has chemical properties that are most similar to iodine
xenon (Xe)
calcium (Ca)
Selenium (Se)
fluorine (F)
Answer:fluorine
Explanation:
Based on location in the periodic table, fluorine (F) has chemical properties that are most similar to iodine.
In the periodic table, elements are classified in groups and periods. The elements in the same group are chemically similar and they have the same number of valence electrons. Elements in the same period have the same highest energy level.
Hence, when looking for an element that is most chemically similar to iodine, we have to consider the element that is in the same group with iodine.
Both fluorine are iodine are both in group 17 hence, fluorine is most chemically similar to iodine.
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If there is H2O and O2 what it's going to be
Answer:
o232
Explanation:
Is this true or false for this question?!
Answer:
True, Electrons are way smaller then protons
Explanation:
Someone pls help me I will make you brain
Answer:
nosé
Explanation:
wadsdfc evdcaedc<dc
Answer:
second one
Explanation:
Minerals have:
A. an exact chemical composition, such as SiO2.
B. a small range in chemical composition, such as (Mg, Fe)2SiO4
C. a large range in chemical composition, such as (Mg, Fe, Al, K, Na)2SiO4
D. no set chemical composition.
Answer:
B
Explanation:
i don't know minerals a good for the body
PLEASE HELPP!
True or False: Hydrogen is an alkali metal.
Answer: falso
Explanation:
water has a density of 1.0 g/mL. a plastic cup floats when it is placed into a container of water. what can you conclude about the density of the plastic cup? (look at the picture)
what is the maximum theoretical number of water molecules with which, in theory, one urea molecule can hydrogen bond?
Answer:
The maximum number of molecules that one water molecule can hold through hydrogen bonding is 4 because the two hydrogen atoms of water can form two hydrogen bonds and the two lone pairs on oxygen can also form two hydrogen bonds. hope it helps
Air pressure is greatest near the surface of the Earth in the _______.
Question 7 options:
Thermosphere
Mesosphere
Troposhere
Exosphere