Answer:
Acid rain
Explanation:
The independent variable in the hypothesis statement is the acid rain. An independent variable is usually the cause in an experiment.
This variable give rises to the effects observed as the dependent variable.
In the presence of the acid rain, the fish population will increase.
The dependent variable is the fish population or number of fishes.
The independent variable is the acid rain as it is the cause of the effect observed on the fish population.
Plz helppp me in this science question
Answer:
1. Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a short amount of time.
2. a. 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.
b. Acceleration is the rate of change of velocity.
3. It can be caused by friction.
Explanation:
can anyone help with this?
The concentration of the acid solution : 0.43 M
Further explanationReaction
Cu + 2HCl ⇒ CuCl₂ + H₂
the amount of Cu reacting :[tex]\tt 13.36-4.54=8.82~g[/tex]
mol Cu :(Ar=63.5 g/mol))[tex]\tt \dfrac{8.82}{63.5}=0.139[/tex]
concentration of the acid solution(HCl) :mol HCl :
[tex]\tt \dfrac{2}{1}\times 0.139=0.278[/tex]
concentration :
[tex]\tt M=\dfrac{mol}{V}=\dfrac{0.278}{0.65~L}=0.43[/tex]
Which statement best describes how to determine whether a precipitate will form?
If Q > Ksp, a precipitate forms to reduce the concentrations of ions.
If Q > Ksp, more solid dissolves to increase the concentrations of ions.
If Q < Ksp, a precipitate forms to increase the concentrations of ions.
If Q < Ksp, more solid dissolves to reduce the concentrations of ions.
Answer:
karl marks.............
Explanation:
........
.....
....
............
Answer:
A. If Q > Ksp, a precipitate forms to reduce the concentrations of ions.
Explanation:
Edg 2021
What is the term for a chemical reaction that uses more energy to break bonds than it releases when forming them?
-Help
Answer: Endothermic Reaction
Explanation:
Imagine that instead of balls, you were rolling positively charged ions of the same element).
One ion has a +1 charge, one ion has a +2 charge, and one ion has a +3 charge. Instead of a
hair dryer, you now have a giant positively charged magnet. Which ion do you think would
be deflected the most by the magnet? Which ion would be deflected the least by the magnet?
Why?
what is the mass of 2.01 x 10^23 atoms of lead?
Answer:
Mass = 68.376 g
Explanation:
Given data:
Mass of lead = ?
Number of atoms of lead = 2.01 ×10²³ atom
Solution:
Number of moles of lead:
1 mole of lead contain 6.022×10²³ atom
2.01 ×10²³ atom × 1 mol /6.022×10²³ atom
0.33 mol
Mass of lead:
Mass = number of moles × molar mass
Mass = 0.33 mol × 207.2 g/mol
Mass = 68.376 g
A _____ ionic compound is a polyatomic ionic compound composed of three or more different elements.
Answer:
ternary
Explanation:
A ternary ionic compound is a polyatomic ionic compound composed of three or more different elements.
What is ionic compound?An ionic compound is a chemical complex made up of ions that are held together through electrostatic forces. The molecule is essentially neutral, however, it contains positively charged cations as well as negatively charged anions.
What is ternary ionic compound?An ionic compound with three components is known as a ternary ionic compound. One type of cation including one type of anion are still present in a typical ternary ionic combination. Polyatomic ions are cations, anion, or both.
Therefore, a ternary ionic compound is a polyatomic ionic compound composed of three or more different elements.
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Can anyone convert this 16 serving recipe to a 20 serving recipe:
1. 1 cup salted butter* softened
2. 1½ cup white (granulated) sugar
3. 1 cup light brown sugar packed
4. 2 tsp pure vanilla extract
5. 2 large eggs
6. 3 cups all-purpose flour
7. 1 tsp baking soda
8. ½ tsp baking powder
9. 1 tsp sea salt
10. 2½ cups chocolate chips (or chunks, or chopped chocolate)
Answer: just double the recipe my dude
Explanation:
everyone is gonna want atleast 3 of these cookies.
How do we represent a shared pair of electrons when drawing the Lewis structure of a covalent bond
Answer:
Please mark as Brainliest!!
Explanation:
The former, known as a 'Lewis dot diagram,' indicates a pair of shared electrons between the atomic symbols, while the latter, known as a 'Lewis structure,' uses a dash to indicate the pair of shared electrons that form a covalent bond. More complicated molecules are depicted this way as well.
Mass is measured in_______
or kilograms.
Answer:
the answer for another measurement of mass is grams
All the physical properties of a mineral result from the mineral's ___. internal arrangement of atoms presence of trace elements chemical formula specific gravity
Answer:
A. internal arrangement of atoms
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such defines the structure of a chemical element.
Generally, these atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.
Hence, all the physical properties of a mineral result from the mineral's internal arrangement of atoms.
The physical properties of the mineral result from the mineral should be A. internal arrangement of atoms
What is an atom?It refers to the smallest unit that contains the matter where the chemical elements should be formed. Also, it is the basic building blocks of matters that represent the structure of the chemical elements. Also, it should be made up of three different particles i.e. protons, neutrons, and electrons.
Hence, The physical properties of the mineral result from the mineral should be A. internal arrangement of atoms
Therefore, the first option is correct.
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Can matter be categorized by weather it’s a pure substance or mixture?
Explanation:
Matter can be broken down in two categories by pure substance and mixtures. Pure substance are further broken down into elements and compounds. Mixtures are physical combined structures that can be separated into their original components.
the percentage of oxygen by mass in water is greatest when...?
ANSWER: We know, by law of constant proportion :
Chemical compounds always contains its component in constant fixed ratio or in fixed percentage without depend on its source, method of preparation and mass of compound.
Therefore, percentage of oxygen is same for any mass.
Hence, this is the required solution.
Explanation:
What mass of water is required to react completely with 157.35 g CO2? (Molar mass of H2O = 18.02 g/mol; molar mass of CO2 = 44.01 g/mol)
157.35 g CO2 =
g H2O
Answer:
64.43
Explanation:
i just took it
Answer:
64.43 and the next one is 16.94 on edge 2020
What the best approach to get onto someone lol
Explanation:
Donate to their twitch and become a tier 5 sub.
IF YOU ANSWER THIS CORRECT U WILL BE AWARDED ... 10pts and brainleist! :) PLEASEEE IM SUFFERING WITH THIS questionnn :(
Answer:
student b because when rotating around the earth the sun will only shine on one spot.
How many moles of Radium are in 280 g of Radium?
HELP PLEASE
Answer:
1.23 moles
Explanation:
What is the primary factor determining whether an atom is
stable or unstable?
Answer: An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy and is unstable.
Explanation: I HOPED THAT HELPED!
The primary factor determining whether an atom is stable or unstable is the forces between the particle.
An atom is the smallest indivisible particle that makes up an element.
An atom is said to be stable if the forces between the particles of the nucleus are balanced. Whereas, an atom is unstable if its forces are unbalanced.
The instability of an atom is due to the excess of either neutrons or protons.
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which of the following elements is the smallest between phosphorus chlorine sulfur and silicon
Answer:
The atomic radius of elements are used to estimate the sizes of elements. The atomic radius is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid state of metals.
To solve this problem we will obtain the atomic radius values of the given elements from a standard atomic radius table;
Si 111 pm
P 98 pm
Cl 79 pm
S 87pm
pm = picometer
We see that chlorine has the least atomic radius
Explanation:
what kind of bond does sodium and chlorine form
a. iconic
b.covalent
Answer:
This type of chemical bond is called an ionic bond because the bond formed between two ions of opposite charge. The sodium cation (Na+) and the chlorine anion (Cl-) are attracted to one another to form sodium chloride, or table salt.
Explanation:
Can I have brainliest if I am right, please?
What factors affect the geometry of a molecule?
The factors that affect geometry of a molecule are
> The number of bonding electron pairs around the central atom.
> The number of pairs of non-bonding ("lone pair") electrons around the central atom.
The factors affect the geometry of a molecule are repulsion between pairs of valence electrons.
What determines molecular geometry?It is the branch of Organic Chemistry that names the geometric shapes that give shapes to atoms arranged in space within molecules, that is, molecular geometry studies the spatial distribution of atoms in molecules.
The main factor that determines the geometry of molecules is the repulsion between the pairs of valence electrons. The Lewis structure provides atomic connectivity, showing us the number and types of bonds between atoms. The spatial shape of a molecule is determined by its bond angles
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What type of particles move to create electricity
Again for the subject there was no sentence
Answer:
Electrons
Explanation:
PLZ HURRY 20 POINTS Into which layer of the Earth do plate boundaries extend? outer core lithosphere lower mantle asthenosphere
Answer:
Lithosphere is the layer of the Earth do plate boundaries extend
Explanation:
Answer:
B. lithosphere
Explanation:
hope this helps
The combination of all the organ systems working together make up a(n) _______________________.
1.organ system
2.organism
3.organ
4.cell
Answer:
2
Explanation:
Identify 5 properties of matter that you encounter every day. Be detailed in your explanation.
Answer:To proceed scientifically, you could measure several properties of the unknown liquid and compare them with the properties of known substances. You might observe and measure such properties as color, odor, texture, density, boiling point, and freezing point.
Explanation:
What landform forms at convergent ocean plate boundaries?
Answer:
Mountains or Islands
Explanation:
They are formed when two plates collide, either crumpling up and forming mountains or pushing one of the plates under the other and into the mantle to melt
Mountain or islands are the landforms that are formed at convergent ocean plate boundaries.
What are landforms?
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins.
Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure, and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features.
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How many moles of ammonia can be made from 0.150 moles of nitrogen gas
Moles of ammonia NH₃ = 0.3
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products
Reaction
N₂(g)+3H₂(g)⇒2NH₃(g)
mol ratio N₂ : NH₃ = 1 : 2
mol NH₃ :
[tex]\tt \dfrac{2}{1}\times 0.15=0.3[/tex]
what might happen to atoms if force didn't exist
Answer: If the strong force didn't exist, there would be nothing but hydrogen and neutrons floating in space.
Explanation:
In animals. energy is produced by the:
A. endoplasmic reticulum
B. nucleus
C. mitochondria
D. chloroplast
Volume of Water -
Volume of Water * Object =
Mass of Object
60 ml
73.5 ml
51.3 g
Density
Answer:
3.8 g/mL
Explanation:
From the question given above, the following data were obtained:
Volume of Water = 60 mL
Volume of Water + Object = 73.5 mL
Mass of object = 51.3 g
Density of object =?
Next, we shall determine the volume of the object. This can be obtained as follow:
Volume of Water = 60 mL
Volume of Water + Object = 73.5 mL
Volume of object =?
Volume of object = (Volume of Water + Object) – (Volume of Water)
Volume of object = 73.5 – 60
Volume of object = 13.5 mL
Finally, we shall determine the density of the object as illustrated below:
Volume of object = 13.5 mL
Mass of object = 51.3 g
Density of object =?
Density = mass /volume
Density of object = 51.3 /13.5
Density of object = 3.8 g/mL
Thus, the density of the object is 3.8 g/mL
