Gneiss is a sedimentary rock and granite is a metamorphic rock. That is option A.
What are rocks?Rocks are geological hard materials that are made up of various types which include:
Sedimentary rocks: These are rocks that made up of various layers formed from sediments. Example is the gnesis.Metamorphic rocks: These are rocks that are form from pre existing rocks that undergoes some transformation. Example is graniteTherefore, Gneiss is a sedimentary rock and granite is a metamorphic rock.
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Answer:
C
Granite is formed due to the slow cooling of magma below Earth's surface and gneiss is formed due to metamorphosis.
Explanation:
I took the test!
What is the pH of 0.0025M H2SO4
Answer:
pH=2.3
Explanation:
One H2SO4 molecule produce two H+ ions.
So conc. of H+ = 2(0.0025)
=0.005
Now, pH=-log (conc. of H+)
=-log(0.005)
=2.3
Select the correct answer.
In a given chemical reaction, the energy of the products is greater than the energy of the reactants. Which statement is true for this reaction?
A. Energy is absorbed in the reaction.
B. Energy is released in the reaction.
C. No energy is transferred in the reaction.
D. Energy is created in the reaction.
E. Energy is lost in the reaction.
How many moles are in 15000 atoms of iron (Fe)?
Avogadro's law states that in each mole of a substance, there are [tex]6.022 \times 10^{23}[/tex] particles.
This means that 15000 atoms is equal to [tex]\frac{15000}{6.022 \times 10^{23}}=\boxed{2.4909 \times 10^{-20} \text{ moles (to 5 sf)}}[/tex]
There are 2.49 × [tex]10^{-20}[/tex] moles present in 15000 atoms of iron (Fe).
What is a mole?A mole is the quantity of a material that includes 6.023 x [tex]10^{23}[/tex] of that substance's components.
What is an atom?The smallest component of ordinary stuff that makes up a chemical element would be an atom.
Calculation of mole
It is known that 1 mole = 6.023 x [tex]10^{23}[/tex] particles.
So, the 1500 atoms will be equal to the = 1500 / 6.023 x [tex]10^{23}[/tex] = 2.49 × [tex]10^{-20}[/tex] moles .
Therefore, there are 2.49 × [tex]10^{-20}[/tex] moles present in 15000 atoms of iron (Fe).
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The heat of fusion of water is 79.9cal/g, the heat of vaporization of water is 540cal/g, and the specific heat of water is 1.00cal/deg/g. How much ice at 0 celsius could be converted to steam at 100 celsius by 9522cal of heat?
The amount of ice converted into steam is 13.23 gram.
What is Heat of Vaporisation ?Heat of Vaporisation is the amount of heat required to convert 1 gm to liquid at its boiling point to vapour.
Let x gram of ice is there
At first x gm of ice will melt
The heat required is x * Heat of fusion = x * 79.9 = 79.9x
Then the heat required to rise the temperature of x gm of water from 0 degree to 100 degree Celsius .
= mc ΔT
= x * 1 * 100 = 100x
The heat required to convert x gm of liquid into x gm of steam
= x * 540 = 540x
The total heat supplied is 9522 cal
79.9x + 100x + 540x = 9522
719.9 x = 9522
x = 13.23 gm
The amount of ice converted into steam is 13.23 gram.
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Question 34 (1 point)
4.00 moles of Ar gas and 5.00 of Xe gas are added to a flask, giving a total pressure
of 15.00 atm. What is the partial pressure, in atm, due to just Xe gas in this system?
6.67 atm
5.00 atm
9.00 atm
8.33 atm
Answer:
8.33 atm
Explanation:
Xe is 5 out of (4+5) or 5 / 9 ths of the gas present
5/9 * 15 atm = 8.33 atm
Jon does an experiment in which he varies the amount of calcium chloride (CaCl2) powder used for the chemical reaction with sodium bicarbonate (NaHCO3). He plans to observe whether the amount of CaCl2 powder has an effect on reaction rate.
Make the most logical prediction for the results of his experiment using the drop-down menus.
I predict that using a larger amount of calcium chloride powder will
______
a. increase
b. decrease
c. have no effect on
the reaction rate because the calcium chloride molecules will ______
a. have more kinetic energy
b. balance the number of product molecules
c. collide more often with other reactant molecules
Answer:
a.) increase
c.) collide more often with other reactant molecules
Explanation:
Generally, when you increase the quantity of reactants, the rate of the reaction increases (the forward reaction). When there are more reactants, there are more chances for them to interact with each other. More interactions means more reactions.
I predict that using a larger amount of calcium chloride powder will increase the reaction rate because the calcium chloride molecules will collide more often with other reactant molecules.
When does the reaction rate would increase?It becomes fair to assume that the reaction rate would increase when Jon increases the quantity of calcium chloride (CaCl2) powder utilised in the chemical reaction with sodium bicarbonate (NaHCO3).
This is due to the fact that adding more calcium chloride powder to the reaction mixture will add more CaCl2 molecules.
There will be more collisions between CaCl2 and NaHCO3 molecules due to the larger concentration of CaCl2 molecules. Successful collisions between reactant molecules are essential for the production of products in a chemical reaction.
Therefore, a greater reaction rate will result from more CaCl2 and NaHCO3 molecules colliding often. The additional molecules contribute to a higher number of energetic collisions, where the reactant particles possess sufficient energy to overcome the activation energy barrier and undergo the reaction.
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A hot air balloon is filled with 1.89 x 10² liters of air at 21°C. If atmospheric pressure does not change,
how hot must the air become in order to increase the volume to 4.5 x 10² liters?
Answer:
7.0k x 10^2k
Explanation:
Which of the following best describes a neutralization reaction?
Answer:
A
The H+ from acid and OH- from base forms water, the other parts form the salt.
When developing an experimental design, which action would improve the
quality of the results?
O A. Have a different researcher make the measurements.
OB. Ensure that it answers a question about cause and effect.
C. Include as many responding variables as possible.
OD. Keep the sample size of test subjects to a minimum.
SUBMIT
Answer:
A
Explanation:
I'm right I took the test
PLEASE HELP ASAP!!!!!!!!!!!!
In the scientific sense the two examples of people doing work is: A and D
Meaning of WorkWork can be defined as a result of applying force to a particular object that changes its displacement in the direction of the applied force.
Work can only be done when their is a force that is being applied and a displacement that occurs.
In conclusion, In the scientific sense the two examples of people doing work is: A and D
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What is the molarity of a solution made by dissolving 3.09 moles of NaCl in 1.50 L of solution?
Answer:
2.06M NaCl
Explanation:
Molarity is defined as a ratio of moles of the solute (the substance you're dissolving) to Liters of solution (the volume of the finished solution). It uses the letter capital M as an abbreviation for the unit.
We're given values for both numbers (with the correct units already), so substitute, and calculate the number part:
[tex]\dfrac{n_{solute}}{V_{solution}}=\dfrac{3.09 [\text{mol NaCl}]}{1.50 [\text{L solution}]}=2.06\dfrac{[\text{mol NaCl}]}{[\text{L solution}]}=2.06[\text{M NaCl}][/tex]
Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Explain how beta emission works.
The nucleus of the atom is the heaviest part of the atom.
The nucleus consists of neutrons and protonsBoth neutrons and protons have masses, but only protons have chargesThe nucleus contains all the positive charges of an atomThe mass of an atom is the sum of the numbers of protons and neutrons in a nucleusWhen the ratio of neutrons to protons is too high, the nucleus becomes unstable and Beta emission has to take place.
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At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.086 s^-1:
2H3PO4(aq)=P2O5(aq)+3H2O(aq)
Suppose a vessel contains H3PO4 at a concentration of 1.27 M . Calculate how long it takes for the concentration of H3PO4 to decrease to 7.0% of its initial value. You may assume no other reaction is important.
Round your answer to 2 significant digits.
Please, need this ASAP
It takes 31 s for 1.27 M H₃PO₄ to decrease its concentration to 7.0% of its initial value following first-order kinetics.
What is first-order kinetics?First-order kinetics occur when a constant proportion of a reactant disappears per unit time.
Let's consider the following first-order kinetics reaction with a rate constant k = 0.086 s⁻¹.
2 H₃PO₄(aq) = P₂O₅(aq) + 3 H₂O(aq)
Given the initial concentation is [H₃PO₄]₀ = 1.27 M, the concentration representing 7.0% of this value is:
[H₃PO₄] = 7.0% × 1.27 M = 0.089 M
We can calculate the time elapsed (t) using the following expression.
ln ([H₃PO₄]/[H₃PO₄]₀) = - k × t
ln (0.089 M/1.27 M) = - 0.086 s⁻¹ × t
t = 31 s
It takes 31 s for 1.27 M H₃PO₄ to decrease its concentration to 7.0% of its initial value following first-order kinetics.
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Balance the following chemical equation:
P4(s)+ O2(g) - P4 O10 (s)
Answer:
The balanced chemical equation is P₄ (s) + 5O₂ (g) → P₄O₁₀ (s)
Explanation:
In order to balance the chemical equation, you first need to see what's out of balance.
In this case our Oxygen is not balanced, so in order to make the two the same, we need to see what coefficient we need to add to the compounds to balance the problem.
So, adding a coefficient of 5 to the O₂ will result in an equal number of oxygen on both sides.
Question 19 of 30
Why does Hess's law allow you to determine the enthalpy change of a
reaction?
A. It states that the enthalpy of any reaction can be determined using
a bomb calorimeter.
B. It states that the change in enthalpy is independent of the pathway
the reaction takes to get to the products.
C. It states how the equilibrium constant is related to the enthalpy
change.
D. It states that the change in enthalpy depends on the reaction
pathway between the products and the reactants.
Answer:
B.) It states that the change in enthalpy is independent of the pathway
the reaction takes to get to the products.
Explanation:
Hess's Law states that the overall enthalpy change is the sum of the enthalpy changes of all preceding steps. It does not matter how many steps there are or the type, so long as the enthalpy change of each is combined at the end, the overall change can be determined. The sequence (aka pathway) is not important.
The buildup of sediment where a river empties into a slow-moving or nonmoving body of water is known as a/an
A type of soil made almost entirely of windblown sediment is called _______.
The _______ in soil comes from decaying plants and animals and their waste products.
_______, which is made up of tiny particles and drains water very poorly, is one of the main components of soil.
A type of soil called peat is most likely to form in a/an
Water helps in the development of soil by carrying _______ and nutrients from upper layers to lower layers.
The _______ of nutrients from soil is common in wet environments, like rain forests.
Quartz-rich parent material leads to the development of _______ soils.
The layers of soil composed mainly of organic matter are known as the ______ and _______ horizon.
A layer of soil in which clay, iron, and other elements from the overlying soil accumulates is known as the _______ horizon, or subsoil.
ANSWERS:
river delta.
loess
organic matter
Clay
swamp (or wetland).
minerals
leaching
sandy
O and A
B
The buildup of sediment in which a river empties right into a slow-transferring or non transferring frame of water is referred to as a Delta.
What is Delta ?Deltas are wetlands that shape as rivers empty their water and sediment into some other frame of water, together with an ocean, lake, or some other river.
A form of soil made nearly completely of windblown sediment is referred to as Loess.
The natural count number in soil comes from decaying flora and animals and their waste products.
Clay, that's made of tiny debris and drains water very poorly, is one of the essential additives of soil.
A form of soil referred to as peat is maximum probably to shape in a/an Coastal surroundings in Tropical placing.
Water enables withinside the improvement of soil with the aid of using carrying Mineral and vitamins from higher layers to decrease layers.
The Richness of nutrients from soil is not unusualplace in moist environments, like rain forests.
Quartz-wealthy determine cloth results in the improvement of Sandy soils.
The layers of soil composed specifically of natural count number are referred to as the O and A horizon.
A layer of soil wherein clay, iron, and different factors from the overlying soil accumulates is referred to as the B horizon, or subsoil.
Delta is stated to be a frame of sediments deposited whilst a river flows into a status water, together with the ocean or a lake.Loess are wind blown deposits of silts and clay composed of quartz, feldspar and different minerals . Loess dominantly have excessive porosity.Organic subjects compose specifically of stays of animal and flora . After this flora and animals dies they shape natural count number that provides to soil vitamins.Clayey soil represent very tiny debris which have a bad draining cappotential because of it tiny bad spaces .Tropical placing in a coastal surroundings affords the important environments for soils like peat to shape . It has plentiful of plant stays . Moreover peat is the primary degree of coal formation, containing wet and unconsolidated plant substances.Minerals part of what help withinside the improvement of the soil .And additionally it is carried right all the way down to the earth with the aid of using water thru a procedure referred to as Leaching.Richness of nutrient are not unusualplace in tropical surroundings which are moist and help plentiful life.Sandy soil are fashioned from dad and mom substances containing minerals together with feldspar and quartz.Horizon O and A are referred to as topsoil and are specifically compose of animal and flora stays and big quantity of minerals.The subsoil or B Horizons consists of mineral together with irons , clay minerals because of percolation from the pinnacle soils and it has a tendency to build up here(subsoil).Learn more about Horizon here ;
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Calculate how many grams of the product form when 16.7 g of calcium metal completely reacts. Assume that there is more than enough of the chlorine gas.
Ca(s) + Cl2(g) → CaCl2(s)
39.96 g product form when 16.7 g of calcium metal completely reacts.
What is the stoichiometric process?Stoichiometry is a section of chemistry that involves using relationships between reactants and/or products in a chemical reaction to determine desired quantitative data.
Equation:
[tex]Ca(s) + Cl_2(g)[/tex] → [tex]CaCl_2(s)[/tex]
In this case, for the undergoing reaction, we can compute the grams of the formed calcium chloride by noticing the 1:1 molar ratio between calcium and it (stoichiometric coefficients) and using their molar mass of 40 g/mol and 111 g/mol by using the following stoichiometric process:
[tex]m_{ca_C_l_2}[/tex]= 16.7 g Ca x [tex]\frac{1 mol \;of \;Ca}{40g Ca}[/tex] x [tex]\frac{1 mol \;of \;CaCl_2}{1 mol \;Ca}[/tex] x [tex]\frac{111g of \;CaCl_2}{1 mol \;CaCl_2}[/tex]
[tex]m_{ca_C_l_2}[/tex] = 39.96 g
Hence, 39.96 g product form when 16.7 g of calcium metal completely reacts.
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Question 5 of 30
Which best describes a gamma ray that is given off during nuclear decay?
A. High-energy electromagnetic waves
B. A stream of small, positively charged particles
C. Low-energy electromagnetic waves
D. A stream of small, negatively charged particles
Gamma rays are high-energy electromagnetic waves given off during nuclear decay; option A.
What are electromagnetic waves?Electromagnetic waves are waves which are produced as a result of the interaction of the magnetic and electric fields.
Types of electromagnetic waves include gamma rays, radio waves, ultraviolet waves.
Gamma rays are high-energy electromagnetic waves given off during nuclear decay
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Which compound is water soluble?
O Li₂S
O PbBr₂
O Au(OH)3
O KCI
Answer:
Li2S is soluble in water
PbBr2 is soluble in hot water
KCI is soluble in water
Determine the hybrid orbital of this molecule.
The hybrid orbital of this molecule is [tex]sp^3[/tex]. Hence, option C is correct.
What is hybridisation?Hybridization is defined as the concept of mixing two atomic orbitals to give rise to a new type of hybridized orbitals.
In this compound, [tex]sp^3[/tex] a hybrid orbital makes I-O bonds. Due to [tex]sp^3[/tex]hybridization iodate should have tetrahedral geometry but because of the presence of lone pair of electrons the shape of [tex]IO^{3-}[/tex] the ion is pyramidal.
The hybrid orbital of this molecule is [tex]sp^3[/tex]. Hence, option C is correct.
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Which one of the atoms shown would most likely form a cation with a charge of +1
The atom present in Option (1) most likely to form cation with a charge of +1
What is a Cation ?
A cation has more protons than electrons, consequently giving it a net positive charge.
For a cation to form, one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them.
The atoms present in Option 1 have one eletron in its outermost shell therefore, it is easy for the atom to lose one elecron than more electron and to attain stable electronic confiuration.
Hence, The atom present in Option (1) most likely to form cation with a charge of +1
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Pleaseee help pleaseee!!!
NaClO₃ ⇒ NaCl + O₂ ⇒ unbalanced
1. O : left 3, right 2
give coefficient left 2, right 3
2NaClO₃ ⇒ NaCl + 3O₂
2. Na and Cl : left 2, right 1
give coefficient right 2
2NaClO₃ ⇒ 2NaCl + 3O₂ ⇒ balanced
6.67 x 10-3 g of arsenic (As) is found in a 0.600 L sample of water. If the density of this
sample is 1.00 g/mL, what is the concentration of arsenic in ppm?
ppm = mg/L = mg/kg
6.67 x 10⁻³ g = 6.67 mg
ppm = 6.67 mg : 0.6 L = 11.12
An atom of elements x has one more shell of electrons than an atom of beryllium,but h are s one less valence electron then beryllium.which element is element X?
Element X is sodium.
If there is one more shell of electrons, then this means it is one period below.
Since there is one less valence electron, it is one group to the left.
What is the balanced form of the chemical equation shown below?
C₂H5OH() + O₂(g) → H₂O(A) + CO₂(g)
Answer: C(2)H(5)OH + 3O(2) —> 3H(2)O + 2CO(2)
Explanation:
*The number in parentheses or
( ) represents the subscript of the element
Carbon-2
Hydrogen-6
Oxygen-7
I hope this is helpful.
Cyclopropane is a compound of carbon and hydrogen that is used as a general anaesthetic. When 1 g of this substance was burned completely in oxygen, 3.14 g of carbon dioxide and 1.29 g of water were produced. What is the empirical formula of the compound? The molar mass of cyclopropane is about 42 g/mol. What is the molecular formula?
Helium is which of the following types of matter?
element
mixture
molecule
compound
Answer:
element.....
it is in the periodic table
what is the relationship of work with distance and the force?
The good answer will be marked as brainlist.....
Answer:
Work is the use of force to move an object. It is directly related to both the force applied to the object and the distance the object moves. Work can be calculated with this equation: Work = Force x Distance.
:)
what is the name of this compound?
The compound above is a cyclic (ring) compound.
What are organic compounds?Organic compounds are compounds which contains carbon and hydrogen.
Some classes of organic compounds include the following:
AlkanesAlkenesAlkynesAkanolsAlkanonesEstersKetonesAminesSo therefore, the compound above is a cyclic (ring) compound.
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how do i solve these equations using proust's law? we haven't gone over balancing chem equations in class and our teacher doesn't want us to use those but instead some kind of ratio? can someone explain
Answer:
Explanation:
Ok so Proust's Law, better known as the Law of Definite Proportions, states that the components of a compound always exist in a fixed ratio. This means that it does not matter what the source of the components are nor the coefficients in front of them. The ratio your teacher is referring to is most likely mass percent/ percent composition. This ratio is the amount of the component over the amount of the entire compound times 100%.
*I am not very familiar with this law so please do with my answers what you will :)*
7.)
First, you want to find the percent composition (aka mass composition) of Na in NaCl.
45.89 g Na
--------------------- x 100% = 39.3%
116.89 g NaCl
So, there must be 39.3% sodium in NaCl. You can find how much chlorine is in NaCl by subtracting that percent by 100 (to find the percent composition of chlorine) then multiplying it by the mass.
100% - 39.3% = 60.7%
60.7% / 100 = 0.0607
116.89 g NaCl x 0.0607 = 70.91 g Cl₂
You could also just subtract the mass of sodium from the mass of sodium chloride to find the mass of chlorine.
116.89 g NaCl - 45.89 g Na = 71 g Cl₂
8.)
10.57 g Mg + 6.96 g O₂ = 17.53 g MgO
6.96 g O₂
--------------------- x 100% = 39.7% O₂
17.53 g MgO
9.)
6.46 g Pb = 1 g O₂
68.54 g Pb = 28.76 g O₂
68.54 g Pb / 28.76 g O₂ = 2.83 g ≠ 6.46 g
No, the two samples are not the same because the proportion of lead to oxygen is not the same for both samples. In the first sample, there is 6.46 g lead for every oxygen. In the second sample, there is 2.38 g lead for every oxygen.
