Answer:
density of sugar = 1.6 g/cm³
density of oil = 0.87 g/mL
Explanation:
1)
Given data:
Mass of object = 12.9 g
Volume of object = 8 cm³
Density of brown sugar = ?
Solution:
Formula:
d = m/v
d = density of object
m = mass of object
v = volume of object
Now we will put the values in formula.
d = 12.9 g/ 8 cm³
d = 1.6 g/cm³
2)
Given data:
Mass of oil = 43.5 g
Volume of container = 50 mL
Density of oil = ?
Solution:
Formula:
d = m/v
d = density of oil
m = mass of oil
v = volume of oil
Now we will put the values in formula.
d = 43.5 g/ 50 mL
d = 0.87 g/mL
6.82
A 2.10-mole sample of crystalline acetic acid, ini-
tially at 17.0°C, is allowed to melt at 17.0°C and is
then heated to 118.1°C (its normal boiling point) at
1.00 atm. The sample is allowed to vaporize at.
118.1°C and is then rapidly quenched to 17.0°C, so
that it recrystallizes. Calculate AH° for the total pro-
cess as described.
Answer:
0 kj
Explanation:
melting/initial temperature = 17.0°c
boiling point = 118.1°C
pressure = 1.00 atm
2.10 mole sample of crystalline
attached below is the detailed solution required
3. describe how unequal heating causes weather
Answer:
The uneven heating causes temperature differences, which in turn cause air currents (wind) to develop, which then move heat from where there is more heat (higher temperatures) to where there is less heat (lower temperatures).
Explanation:
Matter is anything that takes up space and can be described by physical and chemical properties. Which statement
BEST differentiates chemical properties from physical properties?
A)
Physical properties are properties that can be physically seen or touched,
while chemical properties can only be found when matter is mixed with
specific chemicals.
B)
Physical properties are measured when matter changes its physical state,
while chemical properties can only be measured if matter remains in one
state for an extended time.
C)
Physical properties are difficult to measure because they require special
tools to detect, and chemical properties are easy to measure and require
not special tools to detect.
D)
Physical properties can be measured/observed without changing matter
into something else, while chemical properties describe matter's ability to
react/combine with other matter.
Answer:
D)
Physical properties can be measured/observed without changing matter
into something else, while chemical properties describe matter's ability to
react/combine with other matter.
Explanation:
Physical Change
The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.
1 = These changes were reversible.
2= They have same chemical property.
3= These changes can be observed with naked eye.
Example :
Water converting to Ice
Water converting to gas
In this water molecule remain the same only they rearrange themselves that change its state of mater not composition
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
1 = These changes are irreversible
2 = These changes occur due to chemical reactions
3 = These may not be observed with naked eye
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO₂ and ash in case of wood
Boiling of egg: that change the chemical composition of protein in the egg .
The reaction of Hydrogen and oxygen:
H₂ (g) + O₂ (g) → 2H₂O (l)
consider an iron cube and an aluminun cube. If the two cubes were at the same temperature, how would the average kinetic energy of the particles in iron compare with the average kinetic energy of the particles in aluminun
Answer:
I think there would be no differences
What is the oxidation number of Gallium?
Answer: +3
Explanation: Gallium liquefies just above room temperature. Gallium is a soft solid, however it quickly becomes liquid when heated.
How many atoms are in a sample of 2.89 moles of potassium (K)?
Answer:
The answer is
1.74 × 10²⁴ potassium atomsExplanation:
To find the number of atoms given the number of moles we use the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
n = 2.89 moles
We have
N = 6.02 × 10²³ × 2.89
We have the final answer as
1.74 × 10²⁴ potassium atomsHope this helps you
1.why does gravity exist?
2.what does the strength of gravity on?
3.what will have stronger force of gravity, jupiter or earth ?
This class is science !!
Answer:
Gravity exists because elementary particles (electrons, quarks, and neutrinos), are NOT static with time and expansion. Matter is dynamic; elementary particles must continually accrete energy (the quanta of space) in order to conserve the continually increasing angular momentum of the expanding universe.
Strength of gravity
9.80665 m/s 2
Jupiter
convert the following
For lunch you have a glass of sweetened ice tea. The glass contains crushed tea leaves, sugar, a slice of lemon, and both liquid and frozen water (ice cubes). Which of the following categories of matter best describes the contents of the glass? *
Answer:
I think solids
Explanation:
sorry if its not right
How many moles are there in 7.4 X 1023 molecules of AgNO3?
What is each quantity of the length of a pencil
Answer:
In units of measurement of length we use centimeter (cm) to measure. We can use this unit for measuring the length of a pencil, the width of a book etc. but this unit is too big to measure the thicken of a pencil. So we use another unit called millimeter (mm).
Explanation:
If a substance has a density GREATER
than the liquid it's in, then it will
Answer:
sink
Explanation:
a substance with a higher density than others will sink and vice versa
what is the difference between a galvanic cell and an electrolytic cell? APEX
Answer:
A. A galvanic cell generates electrical current, and an electrolytic cell uses electrical energy to cause redox reactions to occur.
Explanation:
A galvanic cell produces electrical energy through the conversion of chemical energy whereas the electrolytic cell carries out the conversion of the electrical energy/current supplied to it into chemical energy. The reaction that takes place in the galvanic cell is spontaneous which is responsible for the electrical energy that is produced. The redox reaction in the electrolytic cell is not spontaneous. Electrical energy has to be supplied to it in order to initiate the reaction.
why does it take more energy to evaporate water than to melt ice?
Answer:
The energy required to completely separate the molecules, moving from liquid to gas, is much greater that if you were just to reduce their separation, solid to liquid. Hence the reason why the latent heat of vaporization is greater that the latent heat of fusion.
Answer:
It takes longer to boil water than to melt ice because of the difference in the amount of heat required to overcome the forces of attraction by keeping the temperature constant during this time. ... This is the reason it takes longer in boiling than in melting.
Calorimetry Gizmo
The answer for Calorimetry Gizmo this lab is hard to find answer but I just save you so yeah :)
Answer:
The answer is JEDDBDDD
Explanation:
How many atoms of aluminum are in a molecule of magnesium aluminum oxide (Al2MgO4)?
Answer:
12
Explanation:
Please help ASAP I’ll make you u as brainlister please 100 points pelaseee
Answer:
(C) im pretty sure is the answer
Explanation:
Answer:
C
Explanation:
Burning 1 kg of coal releases about 3 million joules of energy. If you could use all of the chemical energy to lift another kilogram of coal, how high could you lift it?
I could lift 3.06 x 10⁵ m high
Further explanationEnergy is the ability to do work. Energy can change from one energy to another
Potential energy is the energy that an object has because of its position
The potential energy can be formulated:
Ep = m. g. h
E = potential energy of an object, joule
m = object mass, kg
g = gravity acceleration, m / s²
h = height of an object, m
energy of coal = 3.10⁶ J
mass = 1 kg
g = 9.8 m/s²
[tex]\tt h=\dfrac{E}{m.g}\\\\h=\dfrac{3.10^6}{1\times 9.8}=3.06\times 10^5`m[/tex]
A + ion (positive ion, one with extra positive charge)?
Answer:
If an ion has a positive charge then it has lost an electrons.
Explanation:
So you don't "gain" anything when the ion has a positive charge. It loses an electron which means it has more protons than electrons. Thus, the ion has a positive charge. If it "gained" an electron then it would have a negative charge.
What is our solar System inside
Answer:
The milky waY is the answer
Explanation:
what is the original name for gold
Answer:
It's Anglo Saxon.
Explanation:
From the Latin aurum, which stands for Aurora, the dawn goddess, comes the symbol Au. Early humans were aware of and highly valued gold. Gold is a beautiful and valuable metal that has been used for at least 5500 years. The original name for gold is Anglo-Saxon.
The element number 79 for gold is Au. Gold's Latin name, Aurum, or shining morning, and its earlier Greek origins predate the Anglo-Saxon term for it. It is one of the more abundant elements with a higher atomic number and exhibits very little reactivity towards the majority of atmospheric conditions, such as water and air.
Although gold is typically inert, it can react with a substance called aqua-regia. A substance called aqua regia is used to dissolve gold. Nitric and hydrochloric acids are combined to make them. The oxidizing agent will be nitric acid, which will result in the creation of gold ions.
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A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
OV
Na
Mg
Se
Answer:
Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
Explanation:
The mass number is given at the top left of the elements symbol, for example, sodium has a mass number of 23.
Sodium (Na) square from the periodic table. The mass number (23) is top-left. The atomic number (11) is bottom-left.
We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.
The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).
Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
what bond is Mg3(PO4)2
Sunlight shining through a clear window it’s Jeremy’s face while he does his homework he uses a large wooden wooden block to cover the window what do the wooden block in the clear window demonstrate
Are hemoglobin formation and functioning brains and muscles benefits of Iron?
Chlorine has an atomic number of 17. How many protons are in
the nucleus of a chlorine atom?
Answer:17 protons
Explanation:
An element with 17 protons will always be chlorine. However an element's mass numbers can vary, which means that it can have different numbers of neutrons. So although chlorine has a mass number of 35 which means it has 18 neutrons, it can also have a mass number of 37, which means it has 20 neutrons.
Plz help! :D
What element is as hard as magnesium?
Answer:
Calcium
Explanation:
Im not 100% sure tho
What is a stable electron configuration?
zinc metal reacts with hydrochloric acid to produce hydrogen gas.
what best describes this reaction?
a. A single replacement reaction takes place because zinc is more reactive and hydrogen
b. A single replacement reaction takes place because zinc is more reactive than chlorine
c. A double replacement reaction takes place because zinc is less reactive than hydrogen
d. A double replacement reaction takes place because zinc is less reactive than chlorine
a. A single replacement reaction takes place because zinc is more reactive and hydrogen
Further explanationIn voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent
The more to the right, the metal is less reactive (harder to release electrons) and the stronger oxidizing agent
So that the element located on the left can push the element on the right in the redox reaction
Reaction
Zn+2HCl ⇒ ZnCl₂ + H₂
If we look at this reaction, the elements that play a role are those that undergo a redox reaction
Oxidation : Zn⇒Zn²⁺ + 2e
Reduction : 2H⁺ + 2e ⇒H₂
So Zn (located on the left) can push H (the element on the right) in the redox reaction ⇒ Zn more reactive
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
A+BC⇒AC+B
So the above reaction involves the elements Zn and H which undergo a redox reaction and are included in a single replacement
Answer:
A
Explanation:
Calculating Density Warm Up
What is the density (g/cm3) of 48.0 g of a metal if the
level of water in a graduated cylinder rises from 25.0
mL to 33.0 mL after the metal is added?
1) 0.17 g/cm3
2) 6.0 g/cm3
3) 380 g/cm3
33.0 mL
25.0 mL
object
Calculating Density Warm Up
Answer:
2
Explanation:
33-25=8
48/8=6
The density (g/cm3) of 48.0 g of a metal if the level of water in a graduated cylinder rises from 25.0 mL to 33.0 mL after the metal is added density will be 6.0 g/cm3. option B is correct.
What is density?
The density of any substance is the division of the mass of the given substance to the volume of the given substance and its unit is centimeter cube.
where,
density = mass of substance / volume of the substance
mass of substance = 48.0 g
volume of substance = 33.0 - 25.0 = 8 ml
substituting the value in the formula,
density = 48.0 / 8 = 6 cm³
Therefore, density (g/cm3) of 48.0 g of a metal if the level of water in a graduated cylinder rises from 25.0 mL to 33.0 mL after the metal is added density will be 6.0 g/cm3. option B is correct.
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