Answer:
Liquid
Explanation:
A student measures the heights of four bean plants grown in different types of soil. The amount of water given to each plant is kept the same and they are placed in the same location. What is the independent variable?
Answer:
The independent variable here is the types of soil
Explanation:
An independent variable is the variable that is not affected by the outcome of other variables in a given experiment. This variable is the variable that is intentionally altered/changed (directly or indirectly) by the researcher in order/expected to produce a result for the experiment. Thus, the independent variable here is the types of soil. This is because the soil was intentionally changed/varied by the researcher and it's expected to determine the heights of the bean plants grown.
really simple answer if you know please
A 400 kg box and a 200 kg are to pushed across a horizontal table, the exact same distance with the exact force. Which box will have the most work done on it? Which box will get to the end first? Explain both of your responses.
1. Box A
2. Box B
Explanation:
Box A has the greatest mass. As mass is directly proportional to Work. ie. Work= Force * Distance and Force= mass* acceleration. So,
Work = Mass* Acceleration * Distance
Box B reaches the end first as according to newtons second law, acceleration is inversely proportional to mass.Since, box B has the less mass, it will have higher acceleration and cover more distance.(Distance is directlyproportionalto speed)
Which of these form an ionic bond
Answer:
the second 1
Explanation:
Explain why helium (He) is stable (unreactive), but hydrogen (H) is unstable (reactive)
Answer:
Helium is stable because it has 1 shell and the first shell can only have 2 electrons. Hydrogen is unstable because it has 1 shell but only 1 electron.
Help with this please
Is tap water electrolytes or nonelectrolytes?
Is sugar solution electrolytes or nonelectrolytes?
Is lactic acid solution electrolytes or nonelectrolytes?
Answer:
electrolytes yes it is
Explanation:
i'm built different
Determine between what two integers the square root of a number is
Answer:
If you have your square roots for memory, you know that the square root of 36 is equal to 6. Use a calculator to check your work. Take the square root of 36, as well as the square roots of the two integers surrounding 36, and make sure that the square root of 36 is between the square roots of the two integers.
Explanation:
Consider the chemical equations shown here.
Upper N Upper O (g) + Upper O Subscript 3 Baseline (g) right arrow Upper N Upper O Subscript 2 Baseline (g) + Upper O Subscript 2 Baseline (g) delta Upper H Subscript 1 Baseline = negative 198.9 kilojoules. StartFraction 3 Over 2 EndFraction Upper O Subscript 2 Baseline (g) right arrow Upper O Subscript 3 Baseline (g) delta Upper H Subscript 2 Baseline = 142.3 kilojoules. Upper O (g) right arrow one half Upper O Subscript 2 Baseline (g) delta Upper H Subscript 3 Baseline = negative 247.5 kilojoules.
What is Delta.Hrxn for the reaction shown below?
Upper n upper O (g) plus upper O (g) right arrow upper N upper O subscript 2 (g).
Answer:
-304.1
Explanation:
Just took it on Edge 2020
The enthalpy change for the target reaction is obtained as -304.1 kJ.
What is Hess law?The Hess law of constant heat summation states that; the heat of reaction can be obtained as the sum of the heat of several reactions.
In this case, the enthalpy change for the target reaction can be identified as; -198.9 + 142.3 + (-247.5) = -304.1 kJ.
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Plate tectonics to erosion why do earthquakes occur
Answer:
n California there are two plates - the Pacific Plate and the North American Plate. The Pacific Plate consists of most of the Pacific Ocean floor and the California Coast line. The North American Plate comprises most the North American Continent and parts of the Atlantic Ocean floor. The primary boundary between these two plates is the San Andreas Fault. The San Andreas Fault is more than 650 miles long and extends to depths of at least 10 miles. Many other smaller faults like the Hayward (Northern California) and the San Jacinto (Southern California) branch from and join the San Andreas Fault Zone.
The Pacific Plate grinds northwestward past the North American Plate at a rate of about two inches per year. Parts of the San Andreas Fault system adapt to this movement by constant "creep" resulting in many tiny shocks and a few moderate earth tremors. In other areas where creep is NOT constant, strain can build up for hundreds of years, producing great earthquakes when it finally releases.
Explanation:
Which two substances are reactants in the following chemical equation? CO+H2O -> CO2+H2
A. H2O
B. H2
C. CO2
D. CO
Answer:
a. and d.
Explanation:
H₂O and CO are reactants in the following chemical equation which are water and carbon monoxide respectively.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Multiply 4 2/3 and 1 2/7
Answer:
6
Explanation:
First, turn the mixed numbers into improper fractions.
4 2/3 = 14/3
1 2/7 = 9/7
Next, find the LCM of the denominators of the fractions.
3: 3, 6, 9, 12, 15, 18, 21
7: 7, 14, 21, 28, 35, 42
Then, we can see that 21 is the LCM of 7 and 3 so then we see how many times we had to multiply to get that number.
9/7 x 3/3 = 27/21
14/3 x 7/7 = 98/21
Last you just multiply straight across and simplify if needed.
27/21 x 98/21 = 6/1
6/1 = 6
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Consider the reaction of lead(II) nitrate reacting with sodium phosphate to create lead(II) phosphate and sodium nitrate. If 37.1 g of lead(II) phosphate was created in the reaction, how much (mass) sodium phosphate was originally needed to produce this amount of product
Mass of sodium phosphate needed : 7.54 g
Further explanationReaction
3Pb(NO₃)₂ + 2Na₃PO₄ → Pb₃(PO₄)₂ + 6NaNO₃
mol Pb₃(PO₄)₂(MW=811.54272 g/mol)
[tex]\tt \dfrac{37.1}{811.54272}=0.046[/tex]
mol Na₃PO₄ = mol Pb₃(PO₄)₂=0.046
mass Na₃PO₄(MW=163,94 g/mol) :
[tex]\tt 0.046\times 163.94=7.54124~g[/tex]
Compare and contrast the daughter cells of mitosis and meiosis.
Answer:
For the most part, in mitosis, diploid cells are partitioned into two new diploid cells, while in meiosis, diploid cells are partitioned into four new haploid cells.The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred.
Explanation:
On the periodic table, groups are elements with similar *
O Atomic Number
O Atomic properties
O Atomic Mass
O None of the Above
Answer:
atomic number
Explanation:
hope this will help u(maybe)
A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. Elements fits into a group of elements with similar properties.
What is the name of the process shown in the above picture?
A intercellular communication
B meiosis
C diffusion or simple diffusion
D osmosis
Answer:
C is the answer to the question
Answer:
C. Diffusion or simple diffusion
Explanation:
I took the test
What are the "relative mass" and "actual mass" of the electron, proton, and neutron?
Explanation:
Protons are the positively charged particles in an atom
Neutrons do not carry any charges
Electrons carry negative charges
Particles Charge Actual Mass Relative mass compared to proton
Electrons -ve 9.11 x 10⁻³¹kg [tex]\frac{1}{1840}[/tex]
Protons +ve 1.67 x 10⁻²⁷kg 1
Neutrons 0 1.68 x 10⁻²⁷kg 1
In order to turn oxygen gas into a liquid, it must be ___________.
A. turned into a solid first
B. cooled down
C. heated up
D. mixed with water
Answer:
B
Explanation:
How is Earth's surface most likely to change when a river flows across a steep landscape over time?
It will form into a mountain due to deposition.
Physical weathering will create a channel with curvy loops.
A valley will be carved out due to erosion.
A lake will form due to chemical weathering.
Answer:c
Explanation:
A valley will be carved out due to erosion.
Answer:
it was c
Explanation:
i will do anything just pls answer this like anythting
Answer:
second
Explanation:
Reaction rate describes the blank
of a chemical reaction
Answer:
Explanation:
Likewise, the rate of a chemical reaction is a measure of how much reactant is consumed, or how much product is produced, by the reaction in a given amount of time. The rate of reaction is the change in the amount of a reactant or product per unit time.
A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0 mm of mercury. What will its volume be at 20.0 °C and 780 .0 mm of mercury pressure?
Answer:
New volume V2 = 92.7 Liter (Approx)
Explanation:
Given:
V1 = 106 l
T1 = 45 + 273.15 = 318.15 K
P1 = 740 mm
T2 = 20 + 273.15 = 293.15 K
P2 = 780 mm
Find:
New volume V2
Computation:
P1V1 / T1 = P2V2 / T2
(740)(106) / (318.15) = (780)(V2) / (293.15)
New volume V2 = 92.7 Liter (Approx)
The final volume will be 44.69 L
Initial volume V₁ = 106.0 L
Initial pressure P₁ = 740.0 mm of Hg
Initial temperature T₁ = 45.0⁰C
Final pressure P₂ = 780.0 mm of Hg
Final temperature T₂ = 20.0⁰C
It is required to calculate the final volume V₂
What is an ideal gas equation?
The ideal gas equation is formulated as:
PV = nRT.
In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.
Applying the ideal gas equation considering the gas inside the balloon to be ideal, to get the new volume.
So, from ideal gas law, we get,
[tex]\frac{PV}{T} = constant[/tex]
where P = pressure, V= Volume, T= temperature.
So,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
[tex]V_2 = \frac{P_1V_1T_2}{P_2T_1}[/tex]
On substituting the values;
[tex]V_2=\frac{106.0\times740.0\times20.0}{780.0\times45}[/tex]
V₂ = 44.69 L
Hence, The final volume will be 44.69 L
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A gas experts a force of 5,610 N over an area of 0.342 m2. What pressure does the gas expert in Pa?
Answer:
16,403.5 PaExplanation:
The pressure exerted by the gas can be found by using the formula
[tex]p = \frac{f}{a} \\ [/tex]
f is the force
a is the area
From the question we have
[tex]p = \frac{5610}{0.342} \\ 16403.508...[/tex]
We have the final answer as
16,403.5 PaHope this helps you
How did Devils Tower form, and why is it so much
taller than the surrounding landscape?
Answer:
When the Tower formed around 50 million years ago, it was one to two miles below the Earth's surface. The harder igneous rock of the Tower is more resistant to erosion, and the gray columns of Devils Tower began to stand out above the surrounding landscape.
Explanation:
How many electrons do you need to be considered to have octect? Will Hydrogen and Chlorine share electrons or transfer electrons to each other? Explain your answer. What element has an octect of two valence electrons? How does octect work? What is the difference between ionic and covalent bonds? How is the chemical bond formed in an inonic compound?
Answer:
(1) The outermost shell should have Eight electrons to complete or called as octet and attain stability.
(2) Hydrogen and Chlorine share Electrons with each other and form Covalent bonding.
(3) Hydrogen forms an octet by obtaining an electron, and Helium is the only element that has an octet with two electrons.
(4) The octet rule states that an atom should attain eight electrons in the outermost shell to get stability, However we have exceptional like Hydrogen and helium.
(5) In Ionic bond there is a formation of Ions of the elements in a compound, like in NaCl there will be Na+ and Cl-.
(6) While in Covalent bond there is sharing of electron between the atoms included like O2.
(7) In ionic bond there is an electrostatic force of attraction while in Covalent bond the is a mutual sharing of electrons.
PLS HELPPP How many moles of oxygen atoms (not molecules) are present in 6.41×1025 molecules of dinitrogen pentoxide (N2O5)? 1. 532 mol 2. 106 mol 3. 32 × 1025 mol 4. 266 mol
Answer:
(4) 266 moles
Explanation:
We have Dinitrogen Pentoxide N2O5
6.41*10^25 molecules are given
No of Moles of N2O5 = [tex]\frac{No of Molecules }{Avogadro's Number}[/tex]
= [tex]\frac{6.41 * 10^25}{6.022*10^23}[/tex]
= 106.5 mol
Now using Unitary Method
2 Mole of Nitrogen pentoxide require 5 mole of Oxygen to form N2O5
1 mole of N = [tex]\frac{5}{2}*O[/tex]
In 106.5 mole of N = [tex]\frac{5}{2}*106.5[/tex] = 266.25 mole
So, 6.41*10^25 molecules of N2O5 will require 266.25 mole of Oxygen atoms.
Which era did we live on in 2008
Answer:
21st century
Explanation:
How many magnesium atoms are in the product
Answer: Im not sure if you are doing this in your class.
Explanation:
So... for the element of MAGNESIUM, you already know that the atomic number tells you the number of electrons. That means there are 12 electrons in a magnesium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and two more in shell three
Please help ill mark brainliest please
Answer:
The moons orbit around planets.
Mass is the force that holds people ans objects to earths surface.
Explanation:
Answer:
A, C, E, G
Explanation:
I think they are your answer
Can I have brainliest
Is this question an error or am I missing something?
Answer:
ur missing something`
What volume of 1.60 M hydrochloric acid solution (HCI) is required to neutralize 48.0 mL of 0.200 M sodium
hydroxide solution (NaOH)?
Answer:
Volume of HCl require = 6 mL
Explanation:
Given data:
Volume of HCl require = ?
Molarity of HCl solution = 1.60 M
Volume of NaOH = 48.0 mL
Molarity of NaOH = 0.200 M
Solution:
Formula:
M₁V₁ = M₂V₂
By putting values,
1.60 M×V₁ = 0.200 M×48.0 mL
V₁ = 0.200 M×48.0 mL/1.60 M
V₁ = 9.6 M .mL /1.60 M
V₁ = 6 mL
Which one of the next salts is the most soluble in water, if: Ksp (BaCO3) = 5.1 • 10-9 mol2 / l2; Ksp (CaCO3) = 4.8 • 10-9 mol2 / l2; Ksp (BaSO4) = 1.1 • 10-10 mol2 / l2? *
Answer:
Explanation:
Ksp (BaCO₃) = 5.1 x 10⁻⁹
Ksp (CaCO₃) = 4.8 x 10⁻⁹
Ksp (BaSO₄) = 1.1 x 10⁻¹⁰ = .11 x 10⁻⁹
Since solubility product of BaCO₃ is greatest , its solubility is maximum .It is to be noted that all of them will be giving only two number of ions after dissolution in water .
BaCO₃ = Ba⁺ + CO₃⁻
Ksp = [ Ba⁺²] [ CO₃⁻² ]
= [ Ba⁺²]²
[ Ba⁺²] = √ Ksp
similarly we can find equations for others .