Answer:
Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH-). The process of mixing acid or a base in water is an exothermic one.
Answer:
Electrolytes
Explanation:
Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solutions. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH-). The process of mixing acid or a base in water is an exothermic one.
How much heat is released when 60.0 G of steam at 235°C is converted to water at 100°C?
Answer:12668 J.
Explanation:
First of all, steam is there so in order to convert it into water it must have to release latent heat of vaporization which is equal to approximately 2450 kJ/kg or 2450 J/g.
So, the calculation is given below.
Heat released during conversion of steam at 100°C to water at 100°C= m*L
= 5*2450= 12250 J.
Heat released during conversion of water at 100°C to water at 80°C= m*Cp*(∆T)
= 5*4.18*20= 418 J.
So total heat released= 12668 J.
hope this helps:)!!!
The heat energy released or absorbed by a system can be calculated using calorimetric equation. The heat is released when 60.0 g of steam at 235°C is converted to water at 100°C is 33858 J or 338 KJ.
What is calorimetry?Calorimetry is an analytical tool used to determine the heat energy q absorbed or released in a reaction system. The calorimetric equation connecting mass of the reactant m, specific heat capacity c and temperature difference ΔT is related by the expression:
q = mcΔT.
The mass of steam is given 60 g and temperature difference is from 235 to 100 °C thus 135 °C and the specific heat capacity of water or steam is 4.18 J/°C. The heat energy released is calculated as follows:
q = 60 g × 4.18 J/°C × 135 °C
= 33858 J
Hence, heat is released when 60.0 g of steam at 235°C is converted to water at 100°C is 33585 J.
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19. What is Beryllium's spin ?
Answer:
Nuclear properties
Naturally occurring beryllium, save for slight contamination by the cosmogenic radioisotopes, is isotopically pure beryllium-9, which has a nuclear spin of 3/2.Beryllium is alloyed with copper or nickel to make springs, gyroscopes, electrical contacts, spot-welding electrodes and non-sparking tools, according to the Royal Society of Chemistry. Other beryllium alloys are used in high-speed aircrafts and missiles, as well as spacecraft and communication satellites.
Explanation:
hope this helps if not let me know
What does the word transfer mean?
A. To move from one place to another
B. To block energy flow
C. To move for a new job
D. To move to a warmer place
Group of answer choices
Answer: i think its A.
Explanation: hope it helps :>
Which of the following is the most likely impact of clearing natural landscape to construct high-rise buildings?
Decrease in pollution
Scarcity of drinking water
Increase in animal population
Abundance of non-native plants
Answer:
the abundance of non-native plants. this MAY be right.
Explanation:
i thought it would be an increase in pollution.
Calculate the volume of 450g of gold (density=19.3 g/cm^3)
use dimensional analysis and set up your equation like so:
[tex]450g\ x\ \frac{cm^3}{19.3g}[/tex]
if you do the calculations, the 'g' should cancel out which leaves you with the unit 'cm³'
[tex]cm^3=\frac{450g}{19.3g}[/tex]
[tex]cm^3=23.31606218...[/tex]
= 23.3 cm³
[tex]\text{Density,}~ \\\\~~~~~~~\rho = \dfrac{m}{V}\\\\\implies V = \dfrac{m}{\rho}\\\\~~~~~~~~~~=\dfrac{450 ~g}{19.3 ~ g~cm^{-3}}\\\\~~~~~~~~~~=23.3~ cm^3\\\\\text{Hence, the volume of 450g gold is }~23.3 ~cm^3.[/tex]
How many moles of NaCl are in 5.0 L of a 0.200 M solution?
Answer:
0.1 moles
Explanation:
moles=5.0×0.200
In which state do molecules have the highest kinetic energy? A. in the liquid state B. in the solid state
which of the following provide evidence of plate motion?
A. shapes of the continents
B. fossil s of the same species found on multiple continents
C. the age distribution of basalt at mid ocean ridges
D. the size of the continents
Answer:
The following evidences of plate motion are:
offset of rocks along the San Andres fault.
the age distribution of basalt at mid-ocean ridges.
the age distribution of the Hawaiian Islands
Need help with this chem question
Answer:
b its will shift left
c yes
how does fire relate to science
Answer: A fire itself is the result of a chemical reaction known as combustion, where fuel and oxygen react with one another and atoms rearrange themselves irreversibly. For this to occur, fuel must reach its ignition temperature, and combustion will continue if there is enough fuel, heat and oxygen
Which you would expect to diffuse faster, A or B?
A a gas through another gas
B a liquid through another liquid
b) explain you answer
help pls!
Answer:
A
Explanation:
I would expect a gas to diffuse through another gas faster because gases generally diffuse much faster than liquids. Hence, A is the best option.
What state of matter is it ?
Answer:
aqueous
Explanation:
PLEASE HELP ASAPP!!!!! PLEASE I’LL TRY TO GIVE BRAINLIEST!
What is a benefit of fossil fuel consumption?
low pollution
increased greenhouse gases
renewable resource
cheap energy
Answer:
Cheap energy
Explanation:
Fossil fuels such as coal, oil, and gas are widely available and are much cheaper than other forms of energy (wind, nuclear, etc.) Fossil fuel products are also quite efficient, as the efficieny of fossil fuels is about 50% (which is actually really good), while solar panels for example are only about 15% efficient.
A 30:70 (mole %) ratio of acetone:water is heated to 54.36 ∘C at 760 mmHg. What is the total vapor pressure of the system? The vapor pressures for acetone and water at 54.36 ∘C are 712 mmHg and 154 mmHg respectively.
Answer:
numbers
Explanation:
idek im just bored
Nitroglycerine (C3H5(NO3)) is a powerful explosive. The products of this reaction are
elemental oxygen, elemental nitrogen, water, and carbon dioxide. The Gibbs free energy for this
reaction is negative at 273 K. Determine whether the reaction is spontaneous.
The Gibbs free energy describes the spontaneity of the chemical reaction. The reaction involving nitroglycerine is spontaneous.
What is spontaneity?Spontaneity is the condition of the reaction that continuously makes the product without adding input energy again and again. It is determined by the Gibbs free energy of the system.
When the Gibbs free energy of the thermodynamic system is negative then the reaction is said to be exothermic and is a spontaneous reaction. The negative Gibbs free energy of nitroglycerine at 273 K shows spontaneity.
Therefore, the reaction is spontaneous.
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Chemistry equations are only used in a science lab, we don't use chemistry in everday life situations.
Please select the best answer from the choices provided
OT
OF
Answer:
False
Explanation:
Chemistry is always around us
Which has a higher metallic character?
A)Lithium
B)calcium
Please explain your answer
Answer:
Lithium
Explanation:
lithium because metallic character decreases down the group and lithium comes before in group then calcium
The proposed mechanism for a reaction is:
Step 1: A+B= X(fast)
Step 2: X+C - Y(slow)
Step 3: Y - D (fast)
Which rate law is consistent with this mechanism?
-
O A.
rate = k[A][B]
ОВ.
rate = K[X][C]
O C.
rate = k[A][B][C]
OD.
rate = k[X][Y]
=
Answer:
rate = k[X][C]
Explanation:
When you are solving for rate law, you are only looking at the reactants of the slow reaction. In this case, step 2 is the slow one. Since there is only one X and one C on the reactants side, the coefficient in the rate law would each be one, which you don't need to include, as it is assumed.
05.03: SOUND Energy 9PTS!(9 points)
If objects have a lot of room to vibrate they tend to produce low pitches. If objects can only vibrate a little, they tend to vibrate faster and produce higher pitches. This investigation different an ounce of water effect a glass ability to vibrate observing the pitches it produces.
Question
How does the amount of water in a glass effect the pitch of sound
Hypothesis
complete the hypothesis statement by filling in blank.
If the amount of water in a glass is ________. then the sound pitch will be _______
Variables
What is the test Variable?
__________________________________________________________________
What is the outcome variable?
__________________________________________________________________
What are the constants in this investigation?
__________________________________________________________________
What would you do to ensure that you have a control for this experiment
________________________________________________________________________________________________________________________________________
The pitch of sound increases with decrease in the air volume.
What is the effect of the space on the pitch of sound?The pitch of sound increases with as decrease in the space available for the vibrating particles to vibrate decreases.
In the experiment with water in a glass and the pitch of sound:
If the amount of water in a glass is increases then the sound pitch will be increased.The test variable is the volume of water in th glass cupThe outcome variable is the pitch of soundThe constants are the glass cup and the sound sourceThe control in the experiment can be designed by ensuring that no external sound source is present.Therefore, it was observed that the pitch of sound increases with decrease in the air volume.
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Heat from a fire place is transferred out to the room it How does the heat from the fire place transfer out to the room?
A sample of argon (Ar) gas has a volume of 7.31 L at a pressure of
735 mm Hg and a temperature of 45 C. Determine the volume in
liters when the temperature changes to 55 C and the pressure
changes to 325 mm Hg.
Answer:
17.1 L
Explanation:
P1V1/T1 = P2V2/T2 T is in K
P1V1/T1 * T2/P2 = V2
735 * 7.31 / (45+273.15) * (55+ 273.15)/325 = V2
V2 = 17.1 L
How many moles are in 0.50 g sodium bromide
Which of the following results when hydrogen and chlorine chemically bond to form hydrogen chloride?
A.
a solution
B.
a mixture
C.
a precipitate
D.
a compound
Answer:
Hydrogen chloride is a mixture of hydrogen and chlorine elements. The chemical abbreviation of hydrochloric acid is HCl.
Explanation:
5
Select the correct answer.
In the Arrhenius equation, which variable represents the activation energy for the reaction?
A. Ea
B. R
C.T
D.k
Answer:
A. Ea, activation energy,, hope this helps.
Why are prefixes often added to si units
Answer:
b
Explanation:
b
PLEASE HELP!! 30 PTS
Identify the combination reaction.
1.) 2H 2 + O 2 ⟶ 2H 2O
2.) Cl 2 + 2KBr ⟶ 2KCl + Br 2
3.) Al 2S 3 ⟶ 2Al + 3S
4.) C 4H 12 + 7O 2 ⟶ 6H 2O + 4CO 2
Answer:
1.) 2H2 + O2=2H2O
2.)Cl2 + 2KBr= 2KCl + Br2
4.)C4H12 + 7O2= 6H2O + 4 CO2
1
2
3
4
5
LO
6
7
B
8
9
10
Which functional group is found in an ester?
O=0
R R
O=0
o
с
/
R
OR'
R- OH
O
Answer:
second option
O=C-OR
R
Explanation:
ester: A compound most often formed by the condensation of an alcohol and an acid, with elimination of water. It contains the functional group C=O. joined via carbon to another oxygen atom.
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According to one acid base theory the water acts as ?
What mass of Al2O3 is formed in the reaction of 4700 kg of aluminum?
Answer in units of kg
Answer:
2350kg of Al₂O₃
Explanation:
Step 1 : Write the balanced chemical equation:
4Al + 3O₂ → 2Al₂O₃
Step 2: Find the Ratio of Al : Al₂O₃
Al : Al₂O₃
4 : 2
2 : 1
4700: 2350
= 2350kg of Al₂O₃
This is an impossible formula. Pretend it is real.
If you had 1 mol of Mn6(ClO4)3 how many moles of O would there be? Make sure your answer includes TWO decimal places.
Moles are the ratio of grams to the grams per mole. There are 12 moles of oxygen after dissociation.
What is dissociation?Dissociation is the release of the ions, cations, and anions of the molecular compound in the water. The dissociation of the compound is shown as:
Mn₆(ClO₄)₃ ⇆ 6 Mn³⁺ + 3ClO⁴⁻
From the dissociation, it can be said that 1 mole of magnesium chlorate dissociates into 12 moles of oxygen atoms.
Given, that the moles of the compound is 1 mole.
Then moles of oxygen atom will be: 1 × 12 = 12 moles
Therefore, 12 moles of oxygen atoms are produced from the dissociation of the compound.
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