Answer:
Explanation:
because it took that long for them to think of one.
What kind of bonding holds together
the atoms in a sample of pure zinc
Answer:
Metallic Bonding
Explanation:
Zinc is a metal, as such it's atoms are held together by the metallic bond. Metallic bond is a type of chemical bond formed between positively charged ions in which there is a collective sharing of a sea of valence electrons.
HELP ASAP, HELP NEEDED QUICK, IT'S TIMED
If the concentration of reactants is higher, then the reaction rate is ______.
Select one:
a. generally lower
b. rate determining step is eliminated
c. not affected
d. generally higher
Answer:
option D generally higher
Raoul ate a meal of oats before seeing his doctor. Oats are made of mostly starch molecules. Raoul feels tired, so his doctor gave him a test and found that raoul’s cells contained glucose molecules, but they did not contain enough oxygen molecules. Does this explain why raoul feels tired?.
No, his digestive system is breaking down starch molecules, but his respiratory system may not be working properly.
Oat starch which is mainly stored in the oat endosperm is the most abundant carbohydrate component of oats, and its content varies between 40-50% depending on the variety and growing conditions. Sayer and White 2011. Starch after extraction of oat amylose content lipids was determined by Gudmundson and Eliasson.
Whole grain oats contain large amounts of valuable nutrients such as protein starch unsaturated fatty acids, and dietary fiber in soluble and insoluble fractions. Starch is composed of two glucose polymers amylopectin, and amylose which together form insoluble semi-crystalline starch granules. Both polymers are composed of conjugated glucan chains connected by branch points, but their structure and biosynthesis differ.
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Define the term 'structural isomerism'.
Answer:
In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature) of a compound is another compound whose molecule has the same number of atoms of each element, but with logically distinct bonds between them. The term metamer was formerly used for the same concept.
Explanation:
Foolow me amd if you think i am correct make me brainlist
which element will chemically combine with fluorine to form a salt?
a. carbon
b. lithium
c. neon
d. oxygen
why do magnets move objects in different ways
Answer:
Each magnet has a north and south end. Only opposite ends can attract, But if the ends are the same, they push away from each other. Magnets in some engines make it spin in a certain direction.
plz help asap
Choose all the answers that apply.
The elements in group 18 _____.
are highly reactive
are gases at room temperature
usually do not react with other elements
are in a group called the noble gases
are nonmetals
Which has a higher melting point k2O or MgO???
Please hurry!!
Answer:
MgO (Magnesium Oxide)
Explanation:
K20 = 1,343° ±5° C
MgO = 5,166°F (2,852°C)
MgO > K20
CAN SOMEONE PLZ HELP!!!
Are the chemical equations balanced or not?
Answer:
Remember, chemical reactions follow the law of conservation of mass. Chemical equations show this conservation, or equality, in terms of atoms. However, simply writing down the chemical formulas of reactants and products does not always result in equal numbers of atoms
Explanation:
Answer:
Yes
Explanation:
i think so as there are 2 h on the left
YOU BETTER NOT PASS THIS!! NEED ANSWERS NOW
What are you separating when you use the process of distillation? DESCRIBE how you would separate a mixture using distillation.
Answer:
the process of separating several mixtures of coal with the process of fractional distillation
Explanation:
Kinetic Energy Problems = KE = 0.5m x 12
1. 5 kg wooden block moving at a speed of 2 m/s
2. 71kg man walking at 1.0 m/s
3. 71kg man running at 5.0 m/s
4. 1816kg car traveling at 25 m/s
Explanation:
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
1. Mass, m = 5 kg
Speed, v = 2 m/s
[tex]K_1=\dfrac{1}{2}\times 5\times (2)^2\\\\=10\ J[/tex]
2. Mass, m = 71 kg
Speed, v = 1 m/s
[tex]K_2=\dfrac{1}{2}\times 71\times (1)^2\\\\=35.5\ J[/tex]
3. Mass, m = 71 kg
Speed, v = 5 m/s
[tex]K_3=\dfrac{1}{2}\times 71\times (5)^2\\\\=887.5\ J[/tex]
4. Mass, m = 1816 kg
Speed, v = 25 m/s
[tex]K_4=\dfrac{1}{2}\times 1816\times (25)^2\\\\=567500\ J[/tex]
Solve these problems remember significant figures
Answer:
56) 5,722 mL
57) 750 meters
58) 88 km/hr
59) 88 km/? (I can't give you a complete answer if there's no other unit)
60) 5,169g
61) 53.1m/sec
Explanation:
When you are doing sig figs you do its operations normally. However the way you round depes on the operation;
When you are adding or subtracting sig figs you round to the least number of decimal places. In the case where there is no decimal place keep it the same
When you are multiplying or diving sig figs you round to the least amount of sig figs
The work is in the picture
The colored circles below represent three fake elements A, B
and C.
The fake elements combine to form the following compound.
What is the chemical formula for the compound shown above?
The chemical formula for the compound is AB₂C₄.
What are chemical formula?A chemical formula is define as a formula which identifies each constituent element by its chemical symbols, and indicate the proportionate number of atom of each elements.
Chemical formula is can also be called as empirical formula.
Example - Chemical formula for water is H₂O.
Chemical formula provides chemical composition of a compound.
Chemical formula of a compound is crucial when it represents a chemical equation.
Thus, the chemical formula for the compound is AB₂C₄.
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When mercury oxide is heated, it decomposes into mercury and oxygen. If 28. 4 g of mercury oxide decomposes, producing 2. 0 g of oxygen, what is the percent by mass of mercury in mercury oxide?.
In mercuric oxide percent by mass of mercury is 93 %.
The mercuric oxide molecular formula is HgO. When mercury is reacted with oxygen, then it forms the product mercuric oxide. Mercuric oxide has a molecular mass of 216 g/mol. It has a melting point of 500°C.
The balance equation for the reaction of decomposition of mercury oxide into mercury and oxygen is,
[tex]2HgO (s)→ 2Hg (l) + O _{2}(g)[/tex]
Mass of mercury oxide = 28.4 g
Mass of the oxygen = 2 g
In mercuric oxide percent by mass of mercury is,
[tex]Mass ℅= \frac{Mass \: of \: Mercury }{Mass \: of \: Mercury \: oxide} \times 100[/tex]
[tex]= \frac{28.4 - 2}{28.4} \times 100[/tex]
= 93 %
Therefore, in mercuric oxide percent by mass of mercury is 93 %.
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ellis measured the mass of five samples of quartz. his results were 39.75 g, 38.91 g, 37.66 g, 39.75 g, and 39.55 g. what was the mean mass of the samples? (p. 37
The mean mass of the given sample is 39.12g
The mean is the average of the values in the given set. It indicates that values in a particular data set are distributed equally.mass of first sample = 39.75g
mass of second sample = 38.91g
mass of third sample = 37.66g
mass of fourth sample = 39.75g
mass of fifth sample= 39.55g
Total mass of the sample = 39.75 g + 38.91 g+ 37.66 +39.75 g + 39.55 g = 195.62 g
Number of samples = 5
MEAN = SUM OF MASS OF GIVEN SAMPLES / TOTAL NUMBER OF SAMPLE= 195.62/5= 39.12gTherefore mean mass of the samples = 39.12g
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example of a man-made object that has been changed by weathering
Answer: A man-made object that has been changed by weathering is the pyramids. The pyramids in Egypt have weathered slowly because of the dryness of the desert, but they have indeed weathered throughout the years.
similar
ffer.
jum
eride
Which statements are true regarding these two
compounds? Check all that apply.
Acetone is a covalent compound, while
sodium chloride is an ionic compound.
Ionic compounds conduct electricity well in
their solid (pure) form.'
Covalent compounds have weak attractions
between molecules, resulting in low melting
points.
ECI
1°C
olid
Answer:
-Acetone is a covalent compound, while sodium chloride is an ionic compound
-covalent compounds have weak attractions between molecules, resulting in low melting points
Explanation:
Answer: A and C mah dudes
Explanation: Edgy 2020 <3
in a Lewis structure, why must pairs of unshared of lone pairs if dots be placed around the outside of some of the atoms
Answer:
In a Lewis symbol, the symbol for the element is used to represent the atom and its core electrons. Dots placed around the atom are used to indicate the valence electrons. ... In 1916, Gilbert Newton Lewis, an American chemist, suggested that molecules were formed when atoms shared pairs of outer electrons.
Explanation:
Lewis structures show the electrons in the valence shell of atoms in molecules.
Lewis structures are representations of molecules. They consist of the symbol of the element and the valence electrons in the atoms. The electrons are often shown as dots.
The atoms in molecules could be lone pairs or bond pairs. The bond pairs are shown as two dots on an atom. Since lone pairs are localized on an atom, they are shown as dots on the symbol of the atom that contain them.
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Mood stabilizers may be used to treat (2 points)
Group of answer choices
schizophrenia
bipolar disorder
major depression
ADHD
Answer:
A
Explanation:
it can be help to remove mood swing
Answer:
Bipolar disorder
Explanation:
People with bipolar disorder face extreme episodes of different moods, so mood stabilizers help calm those extremes down and allow the person to retain a consistent mood.
Someone who is good in chemistry please help.
Answer:
2.0×10⁻⁶ mol
Prefix = (2)
exponent = (-6)
Explanation:
Given data:
Number of molecules of water = 1.23×10¹⁸ molecules
Number of moles of water = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules of water
1.23×10¹⁸ molecules × 1 mol / 6.022 × 10²³ molecules
0.20×10⁻⁵ mol
2.0×10⁻⁶ mol
Prefix = (2)
exponent = (-6)
I need help with this please! and thank you. if you don't know, don't comment please.
Answer:
S4O5
Explanation:
An -ite or -ate ending on the name of a compound indicates that the compound:
Explanation:
I'm not sure what it is
What’s the answer????
what is the formula of nitrous acid
Answer:
HNO2
Explanation:
It is a pale blue solution and it is only known in solution and gas form.
2 points
Al + HCI—_AICI:
+_H2
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion
How many molecules are in 1 mole of nitrogen sulfide
Answer:
46.07
Explanation:
im not 100 sure this is right almost tho
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Read the dictionary entry. The adjective radiant in a dictionary entry, showing syllable breakdown and pronunciation guide. 1. Releasing heat 2. Made of radiation 3. Filled with light or very bright The noun radiant in a dictionary entry, showing syllable breakdown and pronunciation guide. 1. The origin of a meteoric shower Read the sentence. She looked at the nighttime sky and saw the silver moon's radiant glow. Which dictionary definition best describes how the word "radiant" is used in this sentence? releasing heat made of radiation filled with light or very bright the origin of a meteoric shower
Answer:
Filled with Light or Very Bright
Explanation:
I took the quiz.
Answer:
your answer is the third one filled with light and very bright
Explanation:
i got it right on the quiz hope it helps
In Philip’s French class, the students are learning how to pronounce closed vowels and open vowels. The students are most likely studying French __________. A. syntax B. phonemes C. semantics D. morphemes
Answer:
It sounds like they are studying French phonemes
Explanations:
I just learned this.
The students were most likely studying French phonemes.
Words are distinguished from each other by respective sounds of the vowels in the word. There are open vowels and there are closed vowels. These exist in every language.
The part of language learning that has to do with the differentiation of pronunciation of sounds is called phonemes. This means that the students were most likely studying French phonemes.
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halogenation of propane
Answer:
The halogenation of propane discloses an interesting feature of these reactions. All the hydrogens in a complex alkane do not exhibit equal reactivity. For example, propane has eight hydrogens, six of them being structurally equivalent primary, and the other two being secondary
What happens to most of the radiant energy that is not converted to thermal energy?
a. It is used in photosynthesis.
b. It is reflected into space.
c. It is converted to electricity.
d. none of the above