Answer:
when you heat the blend, you form iron sulfide, a compound
Depending on the ratio, you could form Fe4S3 or fool's gold
Explanation:When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has properties entirely different from Fe and S. Therefore, heating of mixture of iron and sulphur powder is a chemical change forming a compoundf
what are 5 different bases for birds
Answer:
adenine, guanine, cytosine, thymine, and uracil
If you were able to magnify a penny down to the atomic level, what two
observations could you make about the atoms?
The two observations you would make about the atoms are
They are made up largely of empty spaceTheir mass is concentrated at the center called a nucleusThese observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.
Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.
So,
The two observations you would make about the atoms are
They are made up largely of empty spaceTheir mass is concentrated at the center called a nucleusLearn more about the atom here:
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Answer:
it releases energy that is used for power
Explanation:
Answer: It releases energy that is used for power.
Explanation: https://www.investopedia.com/terms/h/hydrocarbon.asp
1. ___is the speed and direction of movement.
1 Acceleration
2Density
3Velocity
4Work
Answer:
VELOCITY
Explanation:
VELOCITY IS THE SPEED AND DIRECTION OF MOVEMENT
Explanation:
velocity
reason: The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north).
Which statement about exothermic reactions is TRUE?
A.In an exothermic reaction, energy is absorbed, bonds are broken, and the temperature decreases.
B. In an exothermic reaction, energy is released, bonds are formed, and the temperature increases.
Which statement about exothermic reactions is TRUE?
A.In an exothermic reaction, energy is absorbed, bonds are broken, and the temperature decreases.
B. In an exothermic reaction, energy is released, bonds are formed, and the temperature increases.3. Which of the following are examples of chemical changes? Select all that apply.
-Water freezing
-Cookies baking
-Dry Ice subliming
-Wood burning
Answer:
wood burning and cookies baking
Explanation:
took the test <333
Answer:
Wood burning and cookies baking
Explanation:
Select the part that contains the information that a plant cell uses for growth and activities.
a. golgi b. vacuole c. chromosomes d. chloroplasts
The part that contains the information that a plant cell uses for growth and activities is known as Chromosome. Thus, the correct option for this question is C.
What are Chromosomes?Chromosomes may be defined as thread-like structures that appear during cell division. These structures are present in the nucleus of the cell and are made up of DNA, RNA, histones, and some non-histone proteins.
Chromosomes were first discovered by E. Strasburger in 1875. But the term chromosome was given by Waldeyer in 1888. Ultimately, the nucleus of the cell contains all sorts of genetic information which are essential for the growth and activities of organisms.
The Nucleus contains DNA which is known as the genetic material of most organisms including plants.
Therefore, a chromosome is a part that contains the information that a plant cell uses for growth and activities. Thus, the correct option for this question is C.
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2. Differentiate the types of tectonic plates.
There are three main types of plate boundaries:
Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust. ...
Divergent boundaries – where two plates are moving apart. ...
Transform boundaries – where plates slide each other.
sorry pag mali ...Answer:
Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust. ...
Divergent boundaries – where two plates are moving apart. ...
Transform boundaries – where plates slide passed each other.
Explanation:
Read the statements. In eukaryotic organisms, genes usually consist of two alleles. The two alleles are often on different parts of the same chromosome.
These sentences contain incorrect information. Which option describes the mistake?
○ In Eukaryotic organisms, the two alleles of the gene are on different chromosomes.
○ in eukaryotic organisms, genes are usually spread over four or more chromosomes,
○ In eukaryotic organisms, genes usually consist of a single allele.
○ In eukaryotic organisms, the two alleles of the gene are joined end to end on the same chromosome.
Answer:
I think its B but im not too sure
Which of the following would exhibit the lowest conductivity?
a. Mg
b. NaCl
c. CO(2)
d. MgCl(2)
Answer:
the correct answer is b. Co2...............
Name each compound
NaF
K2CO3
….
What kind of feature results from the convergence of two oceanic plates?
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:
Question 116 g of sunflower oil is
used in a recipe. The density of the
oil is 0.925 g/mL. What is the volume
of the sunflower oil in mL?
Explanation:
Volume = mass ÷ density
= 116 g ÷ 0.925 g/mL
= 125.41 mL
A 116 g of sunflower oil of 0.925 g/mL has a volume of 125.41 mL.What is the nutrient indicator of Amino Acids?
Answer:
An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized from scratch by the organism fast enough to supply its demand, and must therefore come from the diet.
Explanation:
Hope it helps you
The diagram shows the box for an element in the periodic table.
What is the atomic mass of the element shown?
A. 11
B. 23.0
C. 34.0
D. 12
A
Explanation:
sodium is a chemical element with the symbol and the atomic number is 11
Atomic Number
Atomic Mass Number
Protons
Neutrons
Electrons
Charge
Element 1
6
12
A
6
6
B
Element 2
6
13
6
C
D
1+
Look at the above table.
How many neutrons should be at (C) Element 2
Question 5 options:
6
7
11
13
Answer: 7
Explanation:
protons + neutrons = atomic mass number
Why do we use the mole concept ??
Answer:
Here
Explanation:
Chemists need the mole concept to bridge the gap between the microscopic world of atoms to the macroscopic world of humans. As you know, the molecular level consists of particles that are invisible to us.
Answer:
it allows us to count atoms and molecules by weighing macroscopic amounts of material.
Why do planets orbit faster as they get closer to the Sun?
The orbit becomes smaller closer to the Sun.
The orbit becomes smaller closer to the Sun.
The eccentricity changes as the planet gets closer to the Sun.
The eccentricity changes as the planet gets closer to the Sun.
The force of gravity increases closer to the Sun.
The force of gravity increases closer to the Sun.
The Sun's magnetism causes a "sling shot" effect.
Explanation:
The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.
what type of carbohydrates provide the body with a sustained release of energy?
Answer:
Fiber-rich, complex carbs
Complex carbs with fiber take much longer to digest than simple carbs. This helps to maintain stable blood sugar levels because sugar enters the bloodstream gradually . Complex carbohydrates provide sustained energy and help you feel fuller for longer because they are digested more slowly.
Which form of carbohydrates can your body use for energy?Glucose, also known as blood sugar, is the primary energy source for your body's cells, tissues, and organs. Glucose can be used right away or stored for later use in the liver and muscles.Carbohydrates are the body's preferred fuel source because they can be quickly converted to glucose. A light carbohydrate snack right before exercise is a good idea for quick energy. Eat protein with carbs to slow the rate at which your body absorbs them for longer-lasting energy.Fat is the most concentrated source of energy in the body, providing more than twice the potential energy of carbohydrate or protein (9 calories per gram versus 4 calories each per gram).To learn more about : Glucose
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a sheet of pure aluminum loses heat. what will happen to the aluminum atoms
Answer:
they will slow down i think
Explanation:
losing heat means it cools down so atoms are slower
which group of elements would react with lithium
Explanation:
lithium has group 1 elements and it valance electron has 1
so it more react with group 7 to be more stable
which molecules are required for the citric acid cycle to fully oxidize the carbons donated by acetyl coa?
Explanation:
At the start of the citric acid cycle, a molecule of oxaloacetate accepts a two-carbon acetyl group from acetyl CoA to form citrate. This reaction kicks off the citric acid cycle; thus, oxaloacetate is required for the cycle to take place.
To begin the citric acid cycle, an oxaloacetate molecule accepts a two-carbon acetyl group from acetyl CoA to form citrate. Because this reaction initiates the citric acid cycle, oxaloacetate is required for the cycle to occur.
What is citric acid cycle ?The Krebs cycle, also known as the citric acid cycle or TCA cycle, is a chain of reactions that occurs in the mitochondria and is used by almost all living cells to produce energy through aerobic respiration. It consumes oxygen and emits water and carbon dioxide as byproducts.
All aerobic organisms use a series of chemical reactions to generate energy by converting acetate derived from carbohydrates, fats, and proteins into carbon dioxide.
The citric acid cycle involves the attachment of an acetyl group from acetyl CoA to a four-carbon oxaloacetate molecule to form a six-carbon citrate molecule.
Thus, Citrate is oxidized in a series of steps, releasing two carbon dioxide molecules for each acetyl group fed into the cycle.
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When you cut an apple, what are the chemical changes and physical changes when cutting it?
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
During recrystallization, why is it necessary to cool the solution slowly?
answer:
the reason is to ensure more solute is dissolving as it cools down. it is important to do it slowly because water will be sucked into buchner flask by a partial vaccum through the rubber tubing and be able to arrange molecules.
What words did the Pilgrims use to describe the new laws?
new and legal
just and equal
godly and fair
In the underlined section, what do the colonists promise to do?
“… and by virtue hereof to enact, constitute and frame such just and equal Laws, … as shall be thought most meet and convenient for the general good of the Colony, unto which we promise all due submission and obedience.”
—Mayflower Compact
igneous rocks might show that there once was blank near by
Answer:
volcano is the likely answer
Predict the ions that form when magnesium(group IIA) and nitrogen (group VA) react:.
Answer: Mg²⁺ & N³⁻
Explanation:
Since Magnesium is in group 2, then it favors losing two electrons forming a cation with a charge of +2 ( Mg²⁺).
Since Nitrogen is in group VA, it favors gaining three electrons forming the anion with charge -3 (N³⁻).
Atoms share one or more pairs of electrons.
Options:
Ionic Bond or Covalent Bond?
Answer:
covalent bonds
Explanation:
ionic transfer of e^- ions formed (charges)
ionic=non-metal+ metal
ex: F+Ca
covalent sharing e^- no true charges
covalent= non-metal+ non-metal
ex: F+P
( my notes)
Nguyên tử nguyên tố sắt có 26e
a. Viết cấu hình e của sắt
b. Sắt thuộc nguyên tố s,p,d,f
Answer:
1s2 2s2 2p6 3s2 3p6 3d6 4s2
Explanation:
cuales son los nombres de la distribución de los electrones en un átomo ?