The imagine below shows an atom arrangement.
Why is it considered a mixture?
a) it’s composed of 1 kind of atom
b) it’s a physical combination of two or more different substances
c) it’s composed of 2 or more types of elements that are chemically combined.
Answers
Related Questions
(04.01 MC) 20 POINTS!!!!!!!!!!!!!!
Greg wrote the following steps in the formation of sedimentary rocks.
Step 1: Weathering of rocks forms sediments
Step 2: Sediments are heated
Step 3: Sediments are deposited
Step 4: Compaction and cementation forms rocks
Which step contains an error?
Select one:
a. Step 1
b. Step 2
c. Step 3
d. Step 4
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Lemme just- ;-; E
Uh- CoRoNaViRuS
Answers
the answer is solid line
which of these pairs of atoms are isotopes
A: scandium-46, titanium-46
B: iron-56, sodium-24
C: chlorine-35, chlorine-37
D: sodium-24, magnesium-24
Answers
Taking into account the definition of isotopes, the correct answer is option C: chlorine-35, chlorine-37
First of all, all atoms are composed of a central nucleus in which there are positively charged particles, the protons, and neutrally charged particles, the neutrons, around which other negatively charged particles that are electrons move.
That is, atoms are made up of a nucleus (made up of protons and neutrons) and a shell made up of electrons.
On the other side, isotopes are atoms whose atomic nuclei have the same number of protons but different numbers of neutrons.
The atomic number (Z) indicates the total number of protons in the nucleus of a given atom, while the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus.
So, in other words, each isotope of the same element has the same atomic number (Z) but each has a different mass number (A). This means that the different isotopes of the same atom differ from each other only by the number of neutrons. So if a neutron is added to an atom, it becomes an isotope of that chemical element.
So, in this case, the correct answer is option C: chlorine-35, chlorine-37, because the two chlorine atoms correspond to the same element but have different atomic masses, whose values are 35 and 37.
Learn more:
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which two statements are true for both compounds and mixtures
A. Their particles are held together by chemical bonds
B. Their particles all have the same chemical formula
C. They are made up of more than one type of atom
D. They can be separated into two or more elements
Answers
Two cars are moving with the same speed. The VELOCITY of both cars will be the same if the cars are moving in:
1. circles.
2. parallel paths.
3. straight lines.
4. the same direction.
Answers
Answer:
4. the same direction
Explanation:
they would have the same speed adn the same direction.
Velocity is speed+direction
Please answer all of the questions , also please dont answer if your not going to seriously answer my questions.
Answers
Answer:
oh that's really hard
Explanation:
but I'll try my best
Is a comet between Mars and Jupiter?
What is a comet?
What is a asteroid? Not an asteroid belt
Answers
:D...........
.............
Answer:
Yes, there are comets between Mars and Jupiter.
Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun.
Asteroids are small, rocky objects that orbit the Sun.
The diagram shows the process of gas exchange in an animal. What happens during gas exchange in this animal?
A. Blood moves into the lungs
B. Blood moves out the lungs
C. Oxygen moves from the blood to the lungs
D. Oxygen moves out of the lungs and carbon dioxide moves into the lungs
Answers
Answer:
D I think
Explanation:
Hey Guys... I need help again...
Having freckles (F) is dominant over not having freckles (f). A parent with freckles is crossed with a parent without freckles. The Punnett square shows the possible genotypes of the offspring.
What is the genotype of each square?
A: FF Ff ff
B: FF Ff ff
C: FF Ff ff
D: FF Ff ff
Answers
Answer:
A: Ff
B: ff
C: Ff
D: ff
Explanation:
You basically look at the box it's asking for, let's use A as an example. On the top where the A column is there's F, so that's one of the thingys I forgot what they're called. Next look at the row of A, and there's f. Put the 2 together and you get Ff. Reminder that any uppercase ones come first.
A=Ff
B=ff
C=Ff
D=ff
The imagine shows the atomic arrangements of four different substances.
Which are compounds and why?
Answers
Water-H2O
Carbon Dioxide-CO2
Methane-CH4
Example of Scientific question?
Answers
Explanation:
how to understand the difference between acid and base
An atom's nucleus contains three protons and three neutrons. What is the overall charge of the nucleus?
O A. O
O B. -3
O C. +3
O D. +6
Answers
Explanation: Protons have positive charge, electrons have negative charge, and neutrons have no charge. Therefore, having three protons and 3 neutrons would give you a net +3 charge.
Hope this helps!
The statement, that describes the overall charge of the nucleus is "+3."
What is nucleus?The atom is made up of a small nucleus surrounded by electrons that move. The nucleus is a positively charged area in the centre of the atom that is made up of closely packed protons and neutrons.
The nucleus includes protons, which have a positive charge equal to the negative charge of an electron. Neutrons, which have nearly the same mass but no charge as protons, may also be found in the nucleus.
The nucleus is made up of three neutrons and three protons. Neutrons have no charge. The charge on the nucleus results from the charge on its protons. As a result, the total charge of the nucleus is +3.
Hence the correct answer is C.
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Helium is a "special" element in Group 18 because it does not have 8 valence electrons. Why doesn't helium have 8 valence electrons like all the other elements in group 18?
Answers
C IS THE ANSWER BECAUSE HELIUM HAS JUST 2 ATOMS
Helium is an element which belongs to a family called noble gas.
Among the noble gas element, helium is the only member with two (2) electrons.
Helium is a s-block element. S-block can only accommodate a maximum of 2 electrons. The two (2) electrons that helium has complete its outermost shell as seen from its electronic configuration below:
He (2) => 1s²Since the outermost shell of helium is completely filled, it is thus included in the noble gas family (i.e group 18).
Other members of the this group include: Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)
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did you know you have to answer 1000 questions to be able to message someone?
Answers
Answer: i didnt know that
Explanation:
Answer: Yes this is in fact true
Explanation:
What is the mass of the ethyl alcohol that exactly fills a 400.0 mL container? The density of ethyl alcohol is 0.789 g/mL.
Answers
Answer:
g = (0.789 g/mL) (200.0 mL) = 158
The mass of ethyl alcohol that exactly fills 400 ml of container is 315.6 grams.
How is mass related to density?Formula of density is given as , density =mass/volume
∴mass=density×volume
From the formula it is evident that density and mass are directly proportional while density and volume are inversely proportional.
From the given data, volume=400 ml and density =0.789 g/ml
∴by the formula,mass=density×volume
mass=0.789×400
mass=315.6 g
Mass and volume are extensive properties that depend on the amount of substance while density is an intensive property and does not depend on amount of substance.
Intensive properties are properties which are independent,wherein size of particles does not change.These properties cannot be easily computed and are not easily identifiable.
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What is the temperature range on the moon?
Answers
Answer: Daytime temperatures near the lunar equator reach a boiling 250 degrees Fahrenheit (120° C, 400 K), while nighttime temperatures get to a chilly -208 degrees Fahrenheit (-130° C, 140 K).
Based on your knowledge of how the greenhouse effect works, why does the level of carbon dioxide affect the global temperature?
This is for science, I need it in my own words.
I will give brainless.
Answers
Answer:
bruh
Explanation:
Identify the feature of the ocean floor covered by the green box.
A. Coral Reef
B. Abyssal Plain
C. Beach
D. Mid-Ocean Ridge
Answers
Explain why plants need sunlight?
A.) Plants need sunlight to create food such as sugars and starches.
B.) Sunlight is used to allow plants perform photosynthesis at night.
C.) Sunlight is used to help release waste produce such as oxygen in plants.
D.) Plants need sunlight to help capture carbon dioxide to create sugars and starches.
Answers
Answer:
D
Explanation:
They make their own food by combining a gas called carbon dioxide, which they get from the air, with water from the soil. ... To power the process, the plant uses the energy of sunlight. A green pigment in the leaves called chlorophyll traps the Sun's energy
explanation
the answer is B because they need water, carbon dioxide and sunlight to preform photosynthesis
What do you understand by Biological nitrogen fixation? PLEASE ANSWER RN
Answers
Answer: Because it is the principal source of the nitrogen in the soil, nitrogen that plants need to grow, nitrogen fixation is one of the most important biochemical processes on Earth. Nitrogen within living organisms is eventually decomposed and converted to atmospheric nitrogen.
Answer: Nitrogen fixation is a process by which molecular nitrogen in the air is converted into ammonia or related nitrogenous compounds in soil.
Explanation:
Can someone please help me with this question? Thanks in advance.
Answers
Answer:
1. Fe + H2SO4 = FeSO4 + H2
iron + sulfuric acid = duretter + hydrogen
2. Mg + 2 HNO3 = Mg(NO3)2 + H2
Magnesium + nitric acid = magnesium nitrate +hydrogen
3. Zn + 2 HCl = ZnCl2 + H2
Zinc + hydrogen chloride= zinc chloride+ hydrogen
Hammer orchids are plants with flowers that are highly modified to resemble a female thynnid wasp (i.e., a wasp of the Thynnidae family) and can only be pollinated by thynnid wasps. Female thynnid wasps cannot fly, but males can. When the female is prepared to mate, she will climb up a tall plant or a blade of grass and wait for a male to appear. Males will pick up the female from her perch and mate with her in flight.
Given this information, in three to five sentences, describe these details:
one other feature of the hammer orchid that could attract its pollinator
how the orchid’s flower adaptation could lead to pollination
why you believe a plant would have more reproductive success with either a specialized pollinator or multiple pollinators
i need help!! y'all wht should i put?
Answers
Answer:
in side
Explanation:
plzz write a small pharghraph
Question:
A 250mL Erlenmeyer flask weighing 55g contains 5g of sodium bicarbonate. To this, an excess, 15g, of acetic acid is added to the flask. While swirling, many bubbles are present. Finally, you stop swirling the flask, and the bubbles stop. You then place this flask on an analytical balance. The mass registers 73g.
How does this final mass compare with the value expected according to the Law of Conservation of mass?
Why do you believe that this comparison exists?
State the Law of Conservation of Mass. Do these results break this law? Why?
What changes, if any, could be made to the procedures in this experiment to allow a closer comparison to what the Law of Conservation would expect?
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Yikes ;-;
I’m stuck- Help-
Answers
Answer:
I'm pretty sure this is potential energy
Explanation:
Potential energy is energy held by an object when its let go its kinetic energy
Potential energy is the point where the object is still and has no type of movement. The energy remains constant until ready to be gained or lost.
Hope this helps!
FIRST TO ANSWER GETS BRAINLIEST
Please hurry this assignment has to be turned in by 11:59
1. Terms in Science are Greek or Latin words
2. Terms in Science are derived from Greek or Latin words
Why?
Answers
Answer:
Terms in science are derived from greek and latin words because precise meaning and precise use of words is crucial in all forms of scientific communication, it helps to be able to make new medical terms from Latin and Greek roots whose meanings do not alter over time
Explanation:
300 g of requires 30000 J of thermal energy to raise the temperature from 25 °C to 85 °C, what is the heat capacity of water? ANSWER ASAP PLEASE
Answers
According to the concept of specific heat capacity, the heat capacity of water is 1666.67 J/Kg°C.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
Substitution of values in the above equation, c=30000/0.3×(85-25)
c=1666.67 J/kg°C
Thus, the heat capacity of water is 1666.67 J/Kg°C.
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When citric acid reacts with baking soda, a salt, water and a gas are produced. What is the name of the gas?
a) carbon dioxide
b) oxygen
c) sodium citrate
d) water vapor
Answers
Answer:
The answer is A
Explanation:
Rocks around mid-ocean ridges teach scientists about
A. how wide abyssal plains are
B. how earthquakes happen
C. changes in the earth's crust
Will give brainlest
Answers
Answer:
I think is C
Explanation:
PLEASE MARK ME AS BRAINLIEST
Cells use energy to carry out various cell processes. Which of the following molecules store energy for the cell to use?
Group of answer choices
Water
ATP
DNA
Chloroplast
Answers
Answer:
ATP
Explonation: It is caused by the sugar molecules that are broken-down