Answer:
Sugar (Sucrose), Corn Syrup (Glucose), Molasses (C6H12NNaO3S)
Explanation:
Each of these is a sweetener.
Hellppppppppplplllppp
Answer:
the third one because oceans don't affect the weather
Explanation:
according to the Aufbau principle, which principle energy level would have higher energy, n=2 or n=5?
Answer:b
Explanation:
PLEASE HELP!!
How many moles are present in 431.56 grams of sodium bicarbonate ( NaHCO3)?
Molar mass of sodium bicarbonate (NaHCO3) = 84.01 g/mol
Answer:
5.14mole
Explanation:
Given parameters:
Mass of sodium bicarbonate = 431.56g
Unknown:
Number of moles = ?
Solution:
To find the number of moles, we use the expression below:
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass = 84.01g/mol
Number of moles = [tex]\frac{431.56}{84.01}[/tex] = 5.14mole
What percent of I-125 has decayed if there are 37.5g of the original sample left?
Answer:
[(x-37.5)/x]*100%
62.5% (assuming the original sample weighs 100.0g)
Explanation:
Let's say that the original sample is x
Mass of I-125 which has decayed: x-37.5
Percentage of decayed mass: [(x-37.5)/x]*100%
Please recheck, for this may not be the correct answer
What is the molar mass of MgI2
Answer:
278.1g/mol
Explanation:
To find the molar mass of the given compound, we must know the atomic mass of the elements within the compound.
Atomic mass of Mg = 24.3g/mol
Atomic mass of I = 126.9g/mol
So;
Molar mass = 24.3 + 2(126.9) = 278.1g/mol
The molar mass of the compound is 278.1g/mol
Balance the Chemical Equation
Pb(OH)2 + HCl ---> H2O + PbCl2
Please help
Answer:
Pb(OH)2 + 2 HCl ---> 2H2o + PbCl2
Explanation:
how did leeuwenhoek discover bacteria
Answer:
Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa. His extensive research on the growth of small animals such as fleas, mussels, and eels helped disprove the theory of spontaneous generation of life.
Explanation:
Hope this helps and have a great day :)
What is the correct number of digits to express a measurement
Answer:
Examples of measured numbers: The diameter of a coin, such as 10.2 mm. The weight of an object, such as 8.887 grams. The length of a pen, such as 12 cm.
Explanation:
Answer:
It completely depends on what you are measuring, what instrument you are using, and the uncertainty associated with your measurement.
Explanation:
When expressing a measurement, there is always going to be a part that you know, and a part that you guess. They both make up known numbers collectively called significant figures (commonly shortened to "sig figs"). For instance, imagine you are measuring the length of a pencil. Let's say it is a typical ruler with divisions of 0.1 cm (picture for reference). You measure the pencil, and to your eyes it looks like it is about 9 cm and 5 small tick marks (so, 0.5 cm), so we'll call that 9.5 cm. Now, this is a known value, so you are certain that it is a least 9.5 cm. However, it may be true that there is one more decimal place that can be known. The general rule is that you want to add one more uncertain digit to the rightmost side of the number, and how many digits depends on the divisions of the instrument. Our ruler has divisions of 0.1 cm (the small tick marks), and so we will go one more place out, and add another digit. Now, let's say our eyes are pretty good, so let's say it's 9.5 cm, and then add that one uncertain digit, a 0 to the smallest division of 0.1, so, 0.10. The final measurement we record is 9.50 cm. Now, it may seem like we are simply guessing or even being unreasonable in our assessment of how long this pencil is. I can promise you that not knowing the actual measurement of this pencil will not make a spaceship crash because of a specification that was not the "right measurement". For those life-or-death measurements, much more precise measurement machines are used; this is just a pencil. Also, it would be unreasonable to say that it is 9.500000 cm or 9.500001 cm. We do not have that kind of certainty with this ruler, only divisions of 0.1 cm, so we can only estimate out to one more decimal place.
In short, find the smallest division of a ruler or whatever device (like a chemical beaker) you are using, and then add one uncertain digit to the end of that. If it's 0.1 cm, then add one digit to that. (example: 5.6 --> 5.63; 3 because that is what it looks like on the ruler). If it's 1 cm, then add an extra .1, so the measurement is 1.1 cm. And of course, it's not always cm you are using, that was just an example. Best of luck!
For work to be done on an object:
*
The work input must be equal to the work output
The energy input must be equal to the energy output
Only a force must be applied, moving the object is not required
The object has to move a distance when a force is applied to it
Answer:
The object has to move a distance when a force is applied to it
Explanation:
For work to be done on a body the force applied must move the body through a particular distance.
Work done = Force x distance
If no distance is moved by the force, no work is done.
Also, the angle between the force and the distance must be 0 to do the maximum work on the body.
What is natural selection help plz help
Answer:
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
Explanation:
Hope this helps! Please consider marking brainliest! I hope you have an amazing day. Always remember, your smart and you got this! -Alycia :)
Answer:
Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
Explanation:
The chemical equation below shows the photosynthesis reaction.
6CO2 + 6H2O → C6H12O6 + 6O2
A reaction uses 528 g of CO2. How many grams of water are used in this reaction?
Answer:
12
Explanation:
Star A and star B are the same distance away from earth. From earth, star A seems brighter than star B. Which star has the highest absolute brightness?
Answer:
Star B
Explanation:
Star B, this is because, usually in the discussions about stars, the more luminous star or say, the brighter star usually is the one that possesses the smaller absolute brightness.
That being said, succinctly put, if we have two stars A and star B, if star A is brighter than star B, then star A has a lower absolute brightness. Also, if star B is less brighter than star A, then it has the higher absolute brightness.
Answer:
STAR B
Explanation:
Which statement(s) below are correct regarding Rutherford's gold foil experiment? Choose ALL that apply.
a. The atom is mostly empty space
b. The mass and positive charge is concentrated in the center of the atom
c. Atoms contain a nucleus
d. Most alpha particles bounced off of the gold foil
Answer:
A,B,C
Explanation:
If different atoms can come together to form living and nonliving things, why is there a limit to different combinations we encounter around the universe?
Explanation:
There is a limit to different things we encounter around the universe due to a lot of reasons.
Some combinations takes place under special conditions due to the activation energy barrier present.To overcome these barriers, some catalysts that are not readily available are needed. This reduces the combination of some atoms in nature.
Also, the right temperature and pressure conditions might not be present. For most reactions to occur, the right conditions must be made available by nature.This and many more reasons limits the combination of chemical substances.
There is a limit to different things we encounter around the universe due to a lot of reasons:
Some combinations takes place under special conditions due to the activation energy barrier present. To overcome these barriers, some catalysts that are not readily available are needed. This reduces the combination of some atoms in nature. Also, the right temperature and pressure conditions might not be present. For most reactions to occur, the right conditions must be made available by nature.So, for a chemical reaction to occur there are certain parameters that need to taken into consideration for a chemical reaction to actually takes place.
Learn more:
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If you mix aqueous solutions of potassium nitrate and iron(II)sulfate what will be the precipitate, if there is one at all?
Answer:
No one will precipitated because these all are soluble in water
Explanation:
2KNO3 + FeSO4 -----> K2SO4 + Fe(NO3)2
What happens to a cell when it's in different environments?
How many moles are in 1.204x10^24 atoms of a gas?
Please help!
1.999 mol gas
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.204 × 10²⁴ atoms gas
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.204 \cdot 10^{24} \ atoms \ gas(\frac{1 \ mol \ gas}{6.022 \cdot 10^{23} \ atoms \ gas})[/tex]Multiply/Divide: [tex]\displaystyle 1.99934 \ moles \ gas[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
1.99934 mol gas ≈ 1.999 mol gas
4. How many moles in 2.0 x 1023 atoms of H2O?
here.
Answer:
0.33 moles
Explanation:
to find the number of moles,
moles = number of atoms / avogadro's number ie 6.02 x [tex]10^{23}[/tex]
moles = 2.0 x [tex]10^{23}[/tex] / 6.02 x [tex]10^{23}[/tex]
moles = 0.33 mol
What isotope of carbon is radioactive:
A) Carbon-12
B) Carbon-13
C) Carbon-14
D) Carbon-13 and Carbon-14
how many grams is 5.16 mol br2?
Answer:
Mass = 824.57 g
Explanation:
Given data:
Mass of bromine = ?
Number of moles of bromine = 5.16 mol
Solution:
Formula:
Mass = number of moles × molar mass
Molar mass of bromine = 159.8 g/mol
by putting values,
Mass = 5.16 mol × 159.8 g/mol
Mass = 824.57 g
The total mass of an atom expressed in atomic mass units is known as the *
mass number.
atomic number.
isotopic number.
covalent number.
Answer:
c
Explanation:
What is the percent composition of nitrogen in N 2 O
Answer:
63.6%
Explanation:
The given compound is:
N₂O;
The problem here is to find the percent composition of nitrogen in the compound.
First find the molar mass of the compound:
Molar mass of N₂O = 2(14) + 16 = 44g/mol
So;
Percentage composition of Nitrogen = [tex]\frac{2 x 14}{44}[/tex] x 100 = 63.6%
Which statement best describes the density of an atom's nucleus?
A The nucleus occupies most of the atom's volume but contains little of its mass,
The nucleus occupies very little of the ston's volume and contains little of its mass.
The nucleus occupies most of the stom's volume and contains most of its mass
The nucleus occupies very little of the ston's volume but contains most of its mass
Answer:
D. The nucleus occupies very little of the volume but contains most of its mass
Explanation:
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the nucleus occupies very little of the volume but contains most of its mass. The correct option is option D.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density = Mass of an atom's nucleus ÷volume marked on the graduated cylinder
Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. The nucleus occupies very little of the volume but contains most of its mass.
Therefore, the nucleus occupies very little of the volume but contains most of its mass. The correct option is option D.
To know more about density, here:
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The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?
A The force of the air resistance on the moving hammer
B The force of the person using the hammer
C The force of gravity pulling down on the hammer
D The force of the nail pushing in the opposite direction
Answer:
A
Explanation:
In simple terms: Hammer goes one way, air goes the other way.
Answer:
d
Explanation:
i took the test
The symbol for iron is Fe. The chemical symbol for oxygen is O. The formula for iron oxide, a type of rust is Fe2O3. How many iron atoms are in one molecule of iron oxide? A. 1
B. 2
C. 3
D. 4
Most of the volume of a gas is ______________________.
Group of answer choices
A. a vacuum
B. dark
C. gone
D. empty space
Please help!
Answer:
D. empty space
Explanation:
Most of the volume of a gas is empty space, which allows gases to be easily compressed. Gas particles are in constant motion, moving rapidly in straight paths. When gas particles collide, they rebound and travel in new directions. Every time they hit the walls of the container, they exert pressure.
Which element below would most likely gain 3 electrons?
Answer:
Lithium
Explanation:
White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?
A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. (1) Since it is given that the white gold is having a uniform composition throughout.So,it means this is a Homogeneous mixtures.
Yo can someone help me answer this
Answer:
D
Explanation:
You need both, independant and dependant variables for a hypothesis.
ScF2 +
KBr ---->
KE +
ScBr2
Balanced equation :
ScF₂ + 2KBr ⇒ 2KF + ScBr₂
Further explanationGiven
Reaction
ScF₂ + KBr ⇒ KF + ScBr₂
Required
Balanced equation
Solution
1. Give coefficient
ScF₂ + aKBr ⇒ bKF + cScBr₂
Sc, left=1, right=c⇒c=1
F, left=2, right=b⇒b=2
K, left=a, right=b⇒a=b⇒a=2
The equation becomes :
ScF₂ + 2KBr ⇒ 2KF + ScBr₂
