Salt suitable for sprinkling on food at meals.
Q4) The changes that occur in an experiment that are directly caused by the experimenter (you) are called ___________.
Answer:
Independent Variables
Explanation:
These are changes that are made by the experimenter. They are factors that one is able to manipulate or control their values.
NEED HELP WITH THIS ASAP PLEAS
What is a mole
Question 1 options:
The SI base unit that represents quantity
The number of atoms in a substance
A large number
small furry animal
What is the value of Avogado's number?
Question 2 options:
6.022x1023
6.022x1023 moles
6.022x1024 moles
6.022x1022
Question 3 (0.1 points)
You have one mole rocks in a gravel pit. How many rocks are in this gravel pit?
Question 3 options:
1 rock
6.022 rocks
6.022x1023
6.022x1023 rocks
You have 5 moles of marbles. How many marbles is this?
Question 4 options:
3.011x1023 marbles
3.011x1024 marbles
6.022x1023 marbles
6.022x1023 moles
You have 1/2 of a mole of dollar bills. How many dollar bills do you have?
Question 5 options:
3.011x1023 moles
3.011x1012 dollars
3.011x1023 dollars
6.022x1023 dollars
You have 1.274 moles of peanuts. How many peanuts do you have?
Question 6 options:
7.672x1023 moles
6.022x1027 peanuts
6.022x1023 peanuts
7.672x1023 peanuts
Answer:
23 atoms of sul- fur. Knowing this, you can measure out 55.847 g of iron and 32.066 g of ... Amount of substance in moles. Number of atoms, molecules, or formula units of substance. Convert using the molar mass of the substance. 1. 2. 3 ... Avogadro's number is the number of atoms per mole of lithium and can be used.
Knowing only the number of atoms of oxygen, you can find the grams of CO2. When converting from atoms to grams always make sure to keep track of your units!
Explanation: plz mark brainleist
determine the number of molecules in 43.9 g of carbon tetrachloride
Answer: There are about 0.28 molecules in 43.9 g of carbon tetrachloride. If you are rounding up, it would be 0.3
Explanation:
2Fe2O3+3C_4Fe+3 CO2 how many moles of Carbon are needed to produce 1.9 moles of iron (Fe)?
Why is the melting of an ice cube an example of a physical change?
A. because a new substance forms
B. because the change is reversible
C. because the melting ice releases energy
D. because the water has different properties than the ice
Answer:
The answer is C because the melting ice releases energy
Explanation:
2NaHCO3 + 3CaCl2 → CaCO3 + 2NaCl + H2O + CO2
Which statement is true about the equation above?
There are 3 chlorines on the reactant side and 3 chlorines on the product side of this equation.
There are 3 chlorines on the reactant side and 3 chlorines on the product side of this equation.
There are 3 calciums on the reactant side and 2 calciums on the product side of this equation.
There are 3 calciums on the reactant side and 2 calciums on the product side of this equation.
There are the same number of oxygen atoms in the reactants and the products. There are the same number of oxygen atoms in the reactants and the products.
This equation does not follow the law of conservation of mass.
Answer:
There are the same number of oxygen atoms in the reactants and the products
Explanation:
However the equation is not balanced
3 Ca on one side and 1 on the other
Glucose is a molecule that organisms can use to release energy, and that is made of nitrogen, lead, and palladium attoms (true false)
Answer:
true
Explanation:
Proxima Centauri is the nearest star to Earth, besides the sun. What can you predict about its brightness compared to other stars? A. Proxima Centauri would be one of the brightest stars in the night sky. B. Proxima Centauri would have the same brightness as other stars in the night sky. C. Proxima Centauri would be one of the dimmer stars in the night sky. D. There is not enough information to make this prediction.
Answer:
ITS D
Explanation:
Answer:
I did the test and the answer is A.
how to round the decimal 4.15 to the hundredths place?
Answer:4.15 is already in the hundreths place so you are good!
if it was 4.155 then you would round it to 4.16 but its NOT that so the answer IS 4.15
Explanation:
Ocean water density varies more at the the poles throughout the year than at the equator.
Lesson 2.08
True
False
Answer:
true
Explanation:
i go to k12
Ocean water density varies more at the the poles throughout the year than at the equator. Therefore, the given statement is true.
What is density?Density is the mass of a specific material per unit volume. d = M/V, in which d is density, M is weight, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density. For instance, whereas Earth has a density of 5.51 grams, water has a density of 1 milligrams.
Particle density, which is typically represented as n, describes the number of particles per volume instead of the density of either a single particle. Ocean water density varies more at the the poles throughout the year than at the equator.
Therefore, the given statement is true.
To learn more about density, here:
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how do we know that all the continents were all together at one point in time. writing prompt and it has to be at least 7 sentences
Answer:
We can tell by how the continents look. Scientists who propose the pangea theory have said this. You can see for yourself because all the continents look like puzzle pieces you could put together. Scientists can also tell from the species. For example, let's say a scientist found a bone of a creature at the edge of a continent, the edge of another would have the same species. They have also calculated that the continents in itself are still splitting apart, but very slowly. The reason they split up was because tectonic plate movements.
HELPPPP!!!! Which statement about plants is accurate?
A.
Plants derive energy to grow from nutrients in the soil.
B.
Plants use sunlight and carbon dioxide to create food.
C.
Plants use oxygen and water to create food.
D.
Plants derive energy to grow from water and nutrients.
Answer:
B. Plants use sunlight and carbon dioxide to create food.
Explanation:
This process is called photosynthesis
Make a diagram showing how communication satellites could be used to relay
information from a broadcasting station in new york to a receiving station in
london.
Answer:
Explanation:
Satellite acts as a relay station for earth sources. A transmission station sends the information to the satellite, which in turn retransmits to the receiving stations. The original signal being transmitted from the earth station to the satellite is called uplink of 6 GHz The retransmitted signal from the satellite to the receiving station is called downlink of 4 GH frequency. The transponder is the transmitter-receiver combination in a transponder.
How do particles differ after a chemical change?
Answer:
The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction.
The particles of the substance are rearranged after a chemical change.
The difference between a physical change and a chemical change is that in a chemical change, the particles of a substance are rearranged to form a new compound.
This regrouping of particles is really what yields the product. The product is always chemically different from the starting materials.
Hence, the particles of a substance are rearranged during a chemical change.
Learn more; https://brainly.com/question/6284546
is Nb6+ a oxidizing agent?
Answer:
yes
Explanation:
because of high positive charge of Nb6+ delta G is more negative for Nb6+ as an oxidising agent♡
Answer:
So Sn2+ is a reducing agent (oxidises itself to Sn4+ hence becoming stable) while Pb2+ is already stable so it neither undergoes oxidation nor reduction.
I need help with the questions in the picture. Please show workings.
Explanation:
you need to review these formulas
A skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. What is the skateboarder's acceleration? acceleration=[acceleration]m/s2
Answer:
The skateboarder's acceleration is -2.33 m/s².
Explanation:
The acceleration of an object is a magnitude that indicates how the speed of the object changes in a unit of time. That is, acceleration is the change in speed in a unit of time.
Acceleration is calculated as the relationship between the variation or change in the speed of a mobile and the time used for said change:
[tex]acceleration=\frac{change in the speed}{time}=\frac{final speed - initial speed}{time}[/tex]
In this case:
final speed= 0 m/sinitial speed= 7 m/stime= 3 sReplacing:
[tex]acceleration=\frac{0 m/s - 7 m/s}{3 s}[/tex]
and solving you get:
acceleration= -2.33 m/s²
The skateboarder's acceleration is -2.33 m/s².
What’s the answer???
Answer:
Well I know that the first one is true.
Explanation:
Answer:
1. TRUE
2. FALSE
3. C
Explanation:
What is defined as a state of matter with a defined volume and shape?
A. Gas
B. Liquid
C. Plasma
D. Solid
Answer:
gas is the state of matter with a defined volume and shape
Since the number of atoms in a substance is so large, a unit to count them was created. This unit is the number of atoms in 12
grams of carbon-12 known as
A)
a mole
B)
a formula unit
Avogadro's number
D)
an atomic mass unit
Identify two sources of heat that melt rocks beneath Earth's surface.
Answer:
magma, melting
An alloy of sodium and potassium is used as a coolant due to its
A.high thermal conductivity
B.physical state
C.high reactivity
D.all except c
Answer:
A
Explanation:
Because It's dense meaning that it doesn't burn
Explanation:
https://youtu.be/f_kgUUaMZlw
Which of the following shows the conservation of mass during cellular
respiration? *
O 6 H2O + C6H1206 – 6 02 + energy
O C6H1206 +6 02 - 6 CO2 + 6H20 + energy
O 6 CO2 + 6 H20 + energy - C6H1206 + 6 02
O 3 CO2 + 3 H20 + energy - 3 C6H1206 +3 02
Answer:
C6H12O6 + 6O2 - 6CO2 + 6H2O + ENERGY
Explanation:
Let me know if I'm right
Which figures are not significant? *
trailing zeros to the left of an invisible decimal point
leading zeros to the right of a decimal point
leading zeros to the left of a decimal point
all of the above
none of the above
Answer:
leading zeroes to the left of a decimal point. and trailing zeros to the left of an invisible decimal point.
Explanation:
All nonzero digits are significant figures. Example: 713 has three significant figures. 18,991 has five significant figures.Zeros located between two nonzero digits are significant figures. Example: 505 has three significant figures. 17,009 has five significant figures.Zeros at the ends of numbers are only significant if there is a decimal point in the number. Example: 502.00 has five significant figures (5,0,2,0,0). 5020 has three significant figures (5,0,2) 100,000 has one significant figure (1)Zeros that come before the first nonzero digit are not significant. Example: 0.0007 has one significant figure (7). 0.0970 has three significant figures (9,7,0) Consider a star with a surface temperature of 12,000
K. According to the graph, the star's peak wavelength
is in the
A) ultraviolet range.
B) radio wave range.
C) visible light range.
D) infrared range.
Answer:
a
Explanation:
Answer:
A. ultraviolet range
Explanation:
name the following compound Mol2
Answer:
you cant answer this
Explanation:
you left something out of the question
Shown above is information about the dissolution of AgCl(s) in water at 298K. In a chemistry lab a student wants to determine the value of s, the molar solubility of AgCl, by measuring [Ag+] in a saturated solution prepared by mixing excess AgCl and distilled water. How would the results of the experiment be altered if the student mixed excess AgCl with tap water (in which [Cl−]=0.010M) instead of distilled water and the student did not account for the Cl− in the tap water?
Answer:
Value for K would be too small. Less AgCl would dissolve due to the common ion effect due to the presence of Cl- in the water.
Explanation:
Think of this through the lenses of a shifting problem. Cl- ions are a product in this situation and increasing its concentration would shift the reaction back to the solid AgCl. In this specific case, due to Cl- ions, AgCl would dissolve less to maintain equilibrium and as a result, the concentrations of Ag+ and Cl- ions would be lower than normal making a smaller K value.
In the solution of AgCl in tap water, the dissociation constant K has been decreased.
The dissolution of silver chloride in water results in the formation of silver ions and chloride ions.
The dissociation constant has been the amount of compound that has been dissociated into the constituent ions at equilibrium.
Dissociation constant for AgClThe dissociation constant has been dependent on the number of ions in the solution that has been present.
The common ion effect has been defined as the change in the dissociation constant for the compound with the presence of common ions in the solution.
The dissociation of AgCl in tap water has been resulted with presence of Cl ions in the solution. There has been early reach to the equilibrium in tap water.
Thus, with the solution of AgCl in tap water, the dissociation constant K has been decreased.
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How many moles each element are in a mole of methane?
[tex] \large \mathcal{ANSWER}[/tex]
This means that the mass of one methane molecule is 12.011 u + (4 × 1.008u), or 16.043 u. This means that one mole of methane has a mass of 16.043 grams. A mole can be thought of as two bags of different sized balls. One bag contains 3 tennis balls and the other 3 footballs.
Samples of helium (He), nitrogen (N 2 ), and methane (CH 4 ) are at STP. Each contains 1 mole or 6.02 × 10 23 particles. However, the mass of each gas is different and corresponds to the molar mass of that gas: 4.00 g/mol for He, 28.0 g/mol for N 2 , and 16.0 g/mol for CH 4 .
Balance the equation c2h2(g)+o2(g)-->co2(g)+h2o(g)+heat
Answer: 2C2H2 (g) + 5O2 ----> 4CO2 (g) + 2H20 (g) + heat
Explanation:
What’s the answer????
Answer:
1. C
2. A
3. A
Explanation: