Answers
Answer:
There should only be one chemical reaction, this is because toasting the bread is not only using heat, but you cannot untoast the bread, and also theres a reaction with the amino acids and sugar in bread when it's cooked. I hope this helps you! :)
Answer:
One
Explanation:
One Chemical changes-It was when he toasted the bread. The heat changed the bread so that it has the crust on the outside
Related Questions
pls hurry
Which important law states that when elements are arranged by atomic number, similarities in chemical properties exist?
1)Periodic Law
2)Mendeleev's 1st law
3)Law of Atomic Structure
4)Theory of Periodic Succession
Answers
Answer:
plusses give me brainliest after this
The answer is: 1. periodic table
what color change is anticipated over the course of the reaction?
Answers
Answer:
can't help you sorry bye
I need a catchphrase for the element Boron as a superhero describing its traits!
Answers
is a skateboard matter or no matter
Answers
Answer:
it is matter cus everything is made up of matter
Explanation:
Answer: yes
Explanation:
Matter makes up everything
which of the following is a physical property of the salt crystals shown here?
A.they are gas
B.they cannot burn
c.they are a liquid
D. they are clear white
Answers
Answer:
As the explanation i think the answer is D
Explanation:
Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes. Soluble in water (35.6g/100g at 0°C and 39.2g/100g at 100°). Slightly soluble in alcohol, but insoluble in concentrated hydrochloric acid.Physical properties: Sodium chloride is a white crystalline solid with a density of 2.16 g/mL, and a melting point of 801 °C. It is also available as aqueous solutions of different concentrations, called saline solutions. Chemical properties: Sodium chloride is readily soluble in water and other polar solvents.
how many molecules of water, h2o, are present in 75.0 g of h2o?
Answers
Answer:
150 molecules of oxygen
Explanation:
when a carbohydrate is attached to a phospholipid what is the structure called
Answers
Answer:
Glycolipid
Explanation:
These are called glycolipids.
Glyco comes from the carbohydrate, and is a word relating to sugars, which are a type of carbohydrate
Lipid is a fat/oil, and as you could have guessed, comes from the phospholipid.
Hope I helped! :)
A carbohydrate attached to a phospholipid is called a glycolipid.
What is a glycolipid?Glycolipids can be described as the complex type lipid containing carbohydrates, fatty acids, and glycerol groups. The glycosidic term is used for any molecule containing one or more monosaccharides bound by glycosidic linkage.
Glycolipids can be also called structural lipids, which are generally found in the extracellular face of the cell membranes. Different types of glycolipid are Cerebroside and ganglioside.
Glycolipids provide energy to cells and help to determine the blood group. The blood group types determine from the oligosaccharides attached to a particular glycolipid on the surface of blood cells.
It assists the immune system of the body by destroying the pathogens in the human body.
A phospholipid is a lipid that is attached to the phosphate group. When the carbohydrate molecules attached to the lipid are known as glycolipid. Glycolipid plays an important role on the cell to cell interaction and cell differentiation.
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How many grams of Hydrogen (H) would need to react with 143 grams of Oxygen (O) to make 235 grams of Water (H20)? 235
Answers
Answer:
45 grams
Explanation:
Identify the name of the ionic compound with the formula MgS. Group of answer choices magnesium sulfide magnesium sulfite magnesium sulfate magnesium sulfur
Answers
MgS → Mg²⁺ + S²⁻
S²⁻ is known as the sulfide ion. That makes MgS Magnesium Sulfide.
For consideration:
magnesium sulfide MgS
magnesium sulfite MgSO₃
magnesium sulfate MgSO₄
magnesium sulfur Mg & S
Magnesium sulfide is an inorganic compound with the formula MgS.
What is Magnesium sulfideMagnesium sulfide (MgS) is an concerning ancient culture compound made by the consolidation of magnesium (Mg) cations and sulfide (S2-) anions. It is calm of individual magnesium ion (Mg2+) and individual sulfide ion (S2-).
In the formation of magnesium sulfide, magnesium drops two electrons to solve a constant eight of something configuration, making a absolutely loaded magnesium ion (Mg2+). Sulfur, in another way, gains two electrons to complete its outer energized matter structure, happening in a negatively loaded sulfide ion (S2-).
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Ammonium sulphate + __________________ potassium sulfate + ammonia + water
Please fill in the blank.
Answers
Answer:
Potassium Hydroxide Solution =
or
Potassium Hydroxide =
Since we know the products and one of the reactions, we can work backward to discover what the other reactant may be.
As it is in the question, we can map the reactants and product:
Reactants Product
Ammonium Ammonia
Sulfate Sulfate
________ Potassium
________ Water
Since the reaction will yield Potassium and water, the likely reactant is Potassium Hydroxide (KOH). This is because we know that Ammonium lost a Hydrogen atom that could combine with the Hydroxide radical to form water.
This becomes clear when we consider the net ionic equation:
Ammonium sulphate + Potassium Hydroxide → potassium sulfate + ammonia + water
if we write this a balanced chemical equation:
(NH₄)₂SO₄ + 2KOH → K₂SO₄ + 2NH₃ + 2H₂O
if we write the reaction as an ionic equation
2NH₄⁺ + SO₄⁻ + 2K⁺ + 2OH⁻ → 2K⁺ + SO₄⁻ + 2NH₃ + 2H₂O
if we remove the ions that appear on both the reactant and product side (spectator ions)
2NH₄⁺ + 2OH⁻ → + 2NH₃ + 2H₂Owhy don't electrons, which are attracted to the protons in the nucleus, simply fall into the nucleus?
Answers
Answer:
electrons are fermions, they can only access an energy level if it has not already been occupied by another electron. Thanks to this principle, there is a minimum energy level within the atom and it is not possible for an electron to collapse to the nucleus because it cannot exceed this} threshold.
Explanation:
I hope I have helped you.
A gas has a volume of 275 mL and a pressure of 3 atm. What is the new volume if the pressure decreases to 1.8 atm?
Answers
Answer:
Use Boyles law.
Given:
P1=3atm
V1=275mL
P2=1.8atm
V2=?
P1V1=P2V2
3x275=1.8xV2
V2=3x275/1.8
V2=458.3mL
what is the wavelength of an X-ray having a frequency of 4.80 x 1017 Hz
Answers
Answer:
Refer to the attachment
What is the element name for mg2SiO4
Answers
Answer:
forsterite
Explanation:
How would one convert 6 pounds to ounces (16 oz = 1b)?
Answers
Answer:
D.
Explanation:
I just got it right in the test :)
what is the characteristics of crystals
Answers
An atom has 17 protons and 18 neutrons.
Which symbol represents that atom, including its mass number?
Answers
Answer:
Cl
Explanation:
cl has mass number 35 and its atomic number is 17 so number of proton =atomic number 17 and number of neutron is =mass number -number of proton =35-17 =18
Which gases are needed for animal and plant respiration? Select two options. FAST ITS TIMED
oxygen
nitrogen
carbon dioxide
neon
carbon
Answers
When you cut an apple, what are the chemical changes and physical changes when cutting it?
Answers
Answer:
cutting of an apple is both physical and chemical change
because cutting a apple, the size and shape of the apple changes. it will be a chemical change because after cutting an apple, the color apple changes when left open
Name the compounds represented by the
following formulas.
a. Ca(NO2)2 c. (NH4)2Cr207
b. Fe(OH)3 d. CuCH3COO
Answers
Answer:
Canxi nito dioxit; Sắt oxit vàng; Amoni dicromat;đồng axitaxetic
Explanation:
Someone pls help me I will make you brain
Answers
Answer:
a
Explanation:
How many moles of Oz would be required to generate 13.0 mol of NO2
in the reaction below assuming the reaction has only 74.1% yield?
2 NO (g) + O2 (g) → 2 NO2 (g)
Answers
Answer:32
Explanation:
Have a nice day :)
What kind of feature results from the convergence of two oceanic plates?
Answers
Answer: When a convergent boundary occurs between two oceanic plates, one of those plates will subduct beneath the other. Normally the older plate will subduct because of its higher density. The subducting plate is heated as it is forced deeper into the mantle, and at a depth of about 100 miles (150 km) the plate begins to melt.
Explanation:
How would the electron configuration of nitrogen change to make a stable configuration?
It would lose four electrons.
It would gain three electrons.
It would gain two electrons.
It would lose five electrons.
Which quantity determines how two atoms bond?
the difference in the number of valence electrons
the difference in their electronegativities
their total number of valence electrons
the sum of their electronegativities
Which statement best explains why the elements in Group 18 do not have electronegativity values?
The elements do not have electrons.
The elements are too large.
The elements have filled valence levels.
The elements have only one electron shell.
Based on patterns in the periodic table, which ion has a stable valence electron configuration?
potassium (K) with a 1+ charge
magnesium (Mg) with a 1− charge
sulfur (S) with a 1− charge
fluorine (F) with a 1+ charge
Which chemical formula represents a polyatomic ion?(1 point)
Na+
Cl–
NaCl
ClO–
Answers
The answers to the questions are as follows;
It would gain three electronsThe difference in their electronegativities.The elements have filled Valence levelspotassium (K) with a 1+ chargeClO-Question 1:
How would the electron configuration of nitrogen change to make a stable configuration?Since Nitrogen has 5 Valence electrons, it needs 3 electrons to attain it's octet configuration. As such, it gains 3 electrons.
Question 2:
Which quantity determines how two atoms bond.The quantity which determines how two atoms bond is The difference in their electronegativities.
Question 3:
Which statement best explains why the elements in Group 18 do not have electronegativity values.This is because the elements have filled Valence levels.
Question 4:
Based on patterns in the periodic table, which ion has a stable valence electron configurationThe ion which has a stable Valence electron configuration is potassium (K) with a 1+ charge
Question 5;
Which chemical formula represents a polyatomic ion?The chemical formula which represents a polyatomic ion is; ClO-
Physical properties are
Answers
Answer:
the 1st one
Explanation:
(b) A student states, "When the alcohol sample was at a temperature of 500 K, all the particles
were moving faster than any of the particles were moving at 400 K." Do you agree or disagree
with this student's statement? Justify your answer.
B
I
Submit
514
alel
(c) Using boxes like the ones below, draw three particle diagrams representing the sample of
alcohol cooling in this experiment. The diagrams should represent the sample at 3 minutes, 12
minutes, and 17 minutes.
Sign out
09:50
Answers
The kinetic energy of particles depends on temperature. As temperature increases, the kinetic energy of particles increases.
Temperature is defined as a measure of the average kinetic energy of the molecules of a substance. The higher the temperature of a substance the greater its kinetic energy.
From the foregoing, when the temperature is increased from 400K to 500K, greater kinetic energy is imparted to the molecules of the substance hence they move faster according to the kinetic theory of matter.
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People who have certain lung diseases, such as emphysema or lung cancer, often have to use oxygen from tanks. A large volume of oxygen can be put into a small tank because oxygen is a gas, and gases can be_________.
Answers
Answer:
I believe the answer is compressed
Explanation:
The answer may be a slightly different word, but if it's looked at by a human and not a robot compressed should work too
Gases can be compressed by applying high pressure. Thus large volume of oxygen can be contained in a tank by compressing the gas with high pressure.
What are gases?Gases are substances in state where its molecules are located far apart and are able to spread in the surroundings. This property of spreading based on the concentration difference is called diffusion.
Thus, gases diffuse from high concentrated area to lower concentration region. Gaseous substances does not have a certain volume, mass or shape. But when they are collected into a container then the volume will be that of the container.
in liquid state, molecules are some more closer in comparison to gases and an intermolecular attraction of force bind these molecules together to have a certain volume and mass. Whereas in solids, all the molecules are tightly packed.
Gases can be liquified by applying high pressure at low temperature so that the distance between molecules can be decreased and an intermolecular force of attraction occurs there.
So that large volume of gases can be collected to a tank by compression using high pressure.
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help asap ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
Answers
Answer:
Option C
Explanation:
Something white solid forms means here is any salt reacted .And it has been reacted with any hydroxide or acid or another salt. And an undissolved solid product formed.which is white.Its totally chemical change
Using the periodic table, complete the ya me to describe each atom. Type in your answers.
Answers
Answer:
Explanation:
Using the periodic table, complete the table to describe each atom. Type in your answers. - 14514242.
hello can anyone help?
Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?
1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.
A) 1 2 and 3
B) 1 and 2 only.
C) 1 and 3 only
D) 2 and 3 only
Answers
Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
