Answer:
D I think
Explanation:
Can someone please help me with this question? Thanks in advance.
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
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
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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Please i really need help
Answer:
in my opinion the answer is A
What do cells need to get energy from food?
A. Carbon dioxide
B. Oxygen
C. ammonia
D. Vitamin C
Answer:
I believe the answer is B oxygen
Explanation:
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pls help first to answer i will mark brainliest.
Answer:
The answer is B
Explanation:
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
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:
brainly.com/question/14403750?referrer=searchResults brainly.com/question/10043246?referrer=searchResults brainly.com/question/15553207?referrer=searchResultshttps://brainly.com/question/20595163?referrer=searchResultshttps://brainly.com/question/419606?referrer=searchResultsSpeed is defined as the distance an object travels per unit of time. Which TYPE of speed is observed when you look at the speedometer of a car?
Question 7 options:
A)
Constant Speed
B)
Instantaneous Speed
C)
Average Speed
Which elements have 8 valence electrons?
Answer:
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr).
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?
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?
Answer:
in side
Explanation:
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?
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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Get ready for the wave of screenshots :>
Answer:
okay let me know when i can help, ill be happy too help
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?
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:
Is a comet found between Mars and Jupiter
This is a Yes or No question
Thank you, Subject is science
Answer:
yes there is a comet
Explanation:
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.
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.
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
What is the center of a plant cell? The actual question is what’s the center of an onions root tip?
Thermal energy “flows” from warmer areas to colder areas. Heat is a measure of this flow.
True or False
Answer:
True
Explanation:
Throughout the universe, it's natural for energy to flow from one place to another. And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation.
The statement, "Thermal energy “flows” from warmer areas to colder areas. Heat is a measure of this flow" is true.
What is thermal energy?The energy created by heat is referred to as thermal energy. It is created when a body's temperature rises. As a result, the molecules, and atoms start to sprint, move quickly, or crash into one another.
When a substance's temperature rises, heat, a type of energy, is created. Temperature, thermal energy, and heat all relate to one another. Heat always moves from a hot body to a cold body.
The heat or thermal energy in the body increases as the temperature rises, causing the movement of the atoms to accelerate and the atoms to collide. Heat is a variable of thermal energy.
Thus, the statement is true.
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NASCAR fans love race day when they get a chance to cheer their favorite team! If a driver was able to travel 600 miles in 3 hours, what is her average speed? Be sure to use the correct formula (s=d/t)
Question 8 options:
A)
1800 mph
B)
200 mph
C)
300 mph
200 mi/hr
Step-by-step explanation:
s= d/t 600 miles/3 hrs = 200 miles/hr
BTW I Love NASCAR
Ponds, streams, and forests are all examples of which ecology term? A: Niches B: Populations C: Ecosystems D: Producers
Answer:
Ecosystems
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.
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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Put the levels of organization in order with 1 being the largest and most complex and 7 being the smallest and most specific.
Question 3 options:
ORDER
CLASS
KINGDOM
SPECIES
PHYLUM
GENUS
FAMILY
DOMAIN
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
Answer:
I think is C
Explanation:
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This photo shows a kind of reproduction. Which of the following describes this type of reproduction?
A. Two parents are required to produce this offspring.
B. Each offspring has a different combination of genes.
C. The offspring have identical genes.
D. Parents make reproductive cells with only half of their genes.
A. Two parents are required to produce this offspring.
Identify the following as examples of abiotic or biotic factors. Mark “A” for abiotic factors or “B” for biotic factors
_________Climate
_________Grass
_________Seaweed
_________Soil
_________Coyote
_________Altitude
_________Precipitation
_________Termite
_________Spider
_________Sunlight
Answer:
Explanation:
Climate - Abiotic
Grass - Biotic
Seaweed - Biotic
Soil - Abiotic
Coyote - Biotic
Altitude - Abiotic
Precipitation - Abiotic
Termite - Biotic
Spider - Biotic
Sunlight - Abiotic
Is a comet between Mars and Jupiter?
What is a comet?
What is a asteroid? Not an asteroid belt
: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.
Nancy dumps a mixture of salt, iron filings, and wood shavings into a beaker of water and stirs for 60 seconds. Predict the appearance after she stops stirring and allows the mixture to settle.
Answer:
When the mixture settles, there will be no visible salt, but she will see the iron shavings at the bottom of the beaker and the woodchips floating.
Explanation:
The salt will dissolve, the iron shavings will sink and the wood chips will float because they're less dense.
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
PLEASE HELP !!!
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Answer:
6m/s
Explanation:
I've done this problem
Example of Scientific question?
Explanation:
how to understand the difference between acid and base