Answers
Answer:
Question 2: Because the elements could be unstable, forming elemental compounds.
Question 1: Water is made up of Hydrogen and oxygen, which is namely called H2^o What makes it a pure substance is the little mass and molecules it's made up of.
Related Questions
PLEASEEE HELP ITS DUE SOON!
Answers
Answer:
The correct answer would be C) Support
Calculate the mass of the zinc that reacts with 4.11 g of hydrochloric acid to form 9.1 g of zinc chloride and 3.97 g of hydrogen gas.
Answers
Answer: Mass of zinc that reacts with 4.11 g of hydrochloric acid to form 9.1 g of zinc chloride and 3.97 g of hydrogen gas is 8.96 g
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
Given: mass of hydrochloric acid = 4.11 g
Mass of products = Mass of zinc chloride + mass of hydrogen = 9.1 g + 3.97 g = 13.07 g
As mass of reactant = mass of products
mass of hydrochloric acid + mass of zinc = Mass of zinc chloride + mass of hydrogen
4.11 g + mass of zinc = 13.07 g
mass of zinc = 8.96 g
When the wind blows across a body of water, ____ between the water and air causes the water to move. ions gravity friction density
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Isotope what dose it mean
Answers
Answer:
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
"some elements have only one stable isotope"
Explanation:
plllllz its 100 and i give brain list
Answers
Answer:
Your answer is the on with the clownfish and the anemone
Explanation:
Hope this helps!
Select a statement which is NOT true about solubility.*
(1 Point)
a) Solubility of solids in liquids increases with temperature.
b) Solubility can be increased by using powdered sugar than sugar cube.
c) Solubility of gases decreases with decrease in temperature.
d) Solubility of solids are different in different solutions.
Ok
Answers
Answer:
I think it's b.
Explanation:
Because solubility increased by temperature.
Answer:
b) Solubility can be increased using sugar powder than sugar cube
i just had my chemistry lessons completed and we were revising solubility llol
heyyyy this is science I will give you brainliest but u have to show your work
Fun question; Naurto or sauske
Answers
In each of the following sets of elements, which one will be least likely to gain or lose electrons?
1. Cesium (Cs), Rubidium (Rb), and Sodium (Na)
2. Barium (Ba), Calcium (Ca), and Beryllium (Be)
3. Fluorine (F), Chlorine (Cl), and Bromine (Br)
4. Tellurium (Te), Oxygen (O), and Sulfur (S)
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2. The elements in this set are the group II alkaline earth metals, and they follow the same trend as the alkali metals. Of the elements here, beryllium (Be) would have the highest effective nuclear charge, and so it would be the least likely to lose its valence electrons. In fact, beryllium has a tendency not to lose (or gain) electrons, i.e., ionize, at all; it is unique among its congeners in that it tends to form covalent bonds.
3. While the alkali and alkaline earth metals would lose electrons to attain a noble gas configuration, the group VIIA halogens, as we have here, would need to gain a valence electron for an full octet. The trends in the group I and II elements are turned on their head for the halogens: The smaller the atomic number, the less shielding, and so the greater the pull by the nucleus to gain a valence electron. And as the atomic number increases (such as when you go down the group), the more shielding there is, the weaker the effective nuclear charge, and the lesser the tendency to gain a valence electron. Bromine (Br) has the largest atomic number among the halogens in this set, so an electron would feel the smallest pull from a bromine atom; bromine would thus be the least likely here to gain a valence electron.
4. The pattern for the elements in this set (the group VI chalcogens) generally follows that of the halogens. The greater the atomic number, the weaker the pull of the nucleus, and so the lesser the tendency to gain electrons. Tellurium (Te) has the highest atomic number among the elements in the set, and so it would be the least likely to gain electrons.
How many moles of each element are in one mole of (NH4)2S? (3 points)
a
1 mole of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
b
1 mole of nitrogen, 6 moles of hydrogen, 1 mole of sulfur
c
2 moles of nitrogen, 6 moles of hydrogen, 1 mole of sulfur
d
2 moles of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
Answers
Answer:
2 moles of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
Explanation: i took the test and got it right
The number of moles for each element in one mole of (NH₄)₂S are:
d. 2 moles of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
Identification of number of moles:The number of moles can be identified by dividing the given mass by molar mass.
In one mole of (NH₄)₂S there are moles of each participating element i.e. nitrogen, oxygen, hydrogen, and sulfur.
In this molecule, there are 2 moles of nitrogen, 8 moles of hydrogen, and one mole of sulfur.
Thus, option d is correct.
Find more information about One mole here:
brainly.com/question/1358482
Answer the question using the equation: HCl(aq)+H2O(l)→H+(aq)+Cl-(aq)+H2O(l)→H3O+(aq)+Cl-(aq) Which product is a Lewis base?
Answers
Answer:
Cl-
Explanation:
The equation of the reaction is;
H+(aq)+Cl-(aq)+H2O(l)→H3O+(aq)+Cl-(aq)
Lewis base refers to substances that can donate a lone pair of electrons(e.g OH^-, Cl^- etc) or a pair of nonbonding electrons.(eg NH3, H20 etc). A Lewis base is therefore an electron-pair donor. They are easily recognized because they often have lone pairs or are negatively charged species.
If we look at the products, Cl- is a Lewis base because it is a lone pair donor. We see this more clearly because the specie is negatively charged.
Answer:
Cl
Explanation:
Cuban swimmer Cesar Godoy won the gold medal In the 150-meter freestyle swim. He
swam 150 meters In 23 seconds. How fast did he swim on average?
Answers
The average speed = 6.52 m/s
Further explanationGiven
distance = 150 m
time = 23 s
Required
The average speed
Solution
The average speed : distance traveled divided by time taken or total distance divided by total elapsed time
Can be formulated :
avg speed = distance : time
avg speed = d : t
Input the value :
avg speed = 150 m : 23 s
avg speed = 6.52 m/s
A scientist was studying a population of elephants. The first year, he counted a population of 80. Over the next eight
years, the population's numbers were 94, 100, 103, 110, 125, 120, 125, 120. What appears to be the carrying capacity
for this population?
0 120
0124
O 125
O 126
Answers
Answer:
The carrying capacity of this population would be 125 we know this because we see that this number occur multiple times and seems to be the tipping point after which the number of the population always go down
Answer:
The carrying capacity of this population would be 125 we know this because we see that this number occur multiple times and seems to be the tipping point after which the number of the population always go down
Explanation:
Convection is the transfer of heat through the rising and sinking of a fluid. A student is constructing an explanation for how convection currents form in the mantle. Which statement would be most useful for the student to include in the explanation?
Answers
Answer:
Capilarity: the rise and fall of the convention currents heat in the mantle
Answer:
Earth's temperatures increase with depth.
Explanation:
because i just know
3. What is the primary consumer in the following food chain, sun - tomato plant - tomato worm - wasp?
tomato worm
tomato plant
wasp
sun
Answers
Answer:
Tomato worm
Explanatio
v
vv
Answer
Tomato Worm
Explanation:
Which member of the alkali metals has the highest
electronegativity?
A)Na
B)Cs
C)Fr
D)Rb
E)Li
F)K
Answers
Answer:
E)Li
Explanation:
Electronegativity is the tendency of an atom to attract a pair of bonding electrons. In the periodic table, electronegativity increases across the period and decrease down the group.
This means the element at the top of the group would have the highest electronegativity.
The correct option is;
E)Li
help for brainlist and extra points!!
Answers
Answer:
Explanation:
c.
which pair shares the same empirical formula. c2h2 and c6h6, c2h2 and c2h4, ch2 and c6h6, ch and c2h4
Answers
Answer:
Answer: CH₃ and C₂H₆ have same empirical formula.
Explanation:
it just compares in that it its the same
Answer:c2h2 and c6h6,
Explanation:
The students in Mrs. Jamison's class were conducting a lab experiment to determine the if temperature affected how fast 2 drops of food coloring mixed into water. They used frozen water, refrigerated water, room temperature water, and hot water. Which water allowed the food coloring to mix the fastest?
A) Hot water
B) Frozen water
C) Refrigerated water
D) Room temperature water
Answers
Answer:
A
Explanation:
Water decomposes into hydrogen and oxygen
Some Nomenclature stuff^
Answers
Answer:
This isnt a question
Explanation:
Answer:
this isn’t a question
Explanation:
Not a question
Plz help... answer this question!
Answers
Answer:
B
Explanation:
Because element is made up of only one type of atoms and figure b show only one type of atoms.
What role did photographic plates play in the discovery of radioactivity?
Answers
When Henri Becquerel investigated the newly discovered X-rays in 1896, it led to studies of how uranium salts are affected by light. By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.
Explanation: Please mark me brainliest :)
What type of Chemical is Pb?
Answers
Answer:
Explanation:
That is the symbol for the element lead
Mr. Evans rides his bicycle an average speed of 8 km/hr. How far has he
traveled if he rides 4 hours?
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Answer:
[tex]\boxed {\boxed {\sf 32 \ kilometers}}[/tex]
Explanation:
Distance is the product of speed and time.
[tex]d=s*t[/tex]
The speed is 8 kilometers per hour and the time is 4 hours.
[tex]s= 8 \ km/hr \\t= 4 \ hr[/tex]
Substitute the values into the formula and multiply. Note that the hours will cancel when multiplied.
[tex]d= 8 \ km/hr * 4 \ hr[/tex]
[tex]d= 32 \ km[/tex]
Mr. Evans traveled 32 kilometers.
Answer:
32 km.
Explanation:
Distance = speed × time
We know that Mr. Evans is riding his bicycle at an average of 8km/hr, or 8 kilometers per hour. He is riding his bike for 4 hours, so we will need to multiply according to the formula.
8 × 4 = 32
The answer to the question is 32 kilometers.
Select the correct answer.
How does adding oxygen (O2) to this reaction change the equilibrium?
2SO2(g) + O2(g) ⇌ 2SO3(g)
A.
The equilibrium shifts right to produce more SO3 molecules.
B.
The equilibrium shifts left to produce more O2 molecules.
C.
The equilibrium shifts right because of decreased collisions between SO2 and O2 molecules.
D.
The equilibrium shifts left with an increase in SO2 and O2 molecules.
E.
The equilibrium shifts left because of increased collisions between SO2 and O2 molecules.
Answers
Answer:
A. The equilibrium shifts right to produce more SO3 molecules.
Explanation:
Explain the similarities and differences between putting a beaker of ethanoic acid in the refrigerator and mixing it with sodium carbonate
Answers
Answer:
See explanation
Explanation:
When a beaker of ethanoic acid is placed in the refrigerator, its temperature drops and the vessel feels cool.
Now, when we mix ethanoic acid and sodium carbonate, an endothermic reaction occurs, fizzing is observed as carbon dioxide is given off and heat is lost to the surroundings causing the reaction vessel to feel cool to touch.
The difference between putting ethanoic acid in the refrigerator and adding sodium carbonate to the solution is that, in the former, no new substance is formed. The substance remains ethanoic acid when retrieved from the refrigerator. In the later case, new substances are formed. The substance is no more ethanoic acid because a chemical reaction has taken place.
PLEASE HELP ME what happened to the green trait in mendel's pea plants
Answers
Answer:
Mendel's gene involved in pea color decides whether the chlorophyll in the pea will be broken down or degraded. When this gene isn't working, the chlorophyll stays around and the pea is green. So in this case the recessive trait is indeed due to a broken gene.
Explanation:
The green trait in Mendel's pea plants should be involved is considered to be pea color.
Green trait in Mendel's pea plants:Mendel's gene included in pea color that the chlorophyll should be in the pea and the same should be split down or degraded.
Also when the gene should not be working so here chlorophyll should stays around and the pea should be green.
In this case, the recessive trait for indeed because of the broken gene.
Learn more about plants here: https://brainly.com/question/18532463
Something used to power some devices.
Answers
Answer:
electricity
Explanation:
or maybe food
A __________________ chemical equation shows that the same number of atoms in the reactants are also in the product.
balanced
rearranged
transferred
beautiful
Answers
What is the highest occupied energy level for an atom of copper (Cu)? *
Answers
Answer:
third energy level - 18
hope this helps
State, in terms of the strength of intermolecular forces, why 12 has a higher boiling point than F2
Answers
Answer:
See explanation
Explanation:
The greater the relative atomic mass of an atom the more polarizable the atom is.
Also, the magnitude of dispersion forces depends on the molecular mass of the compound.
We must remember that both I2 and F2 are nonpolar molecules that are purely held together by dispersion forces.
Hence, I2, having the greater molecular mass and surface area experiences a greater magnitude of dispersion forces and consequently has a higher boiling point than F2.