Answer:
C-HOC6H12OH and HOOCCH.COOH
hexane-1,6-diol and propane-1,3-dioic acid
give three different between temporary and permanent change
Answer:
temporary is only for specific amount of time and permanent is suppost to mean forever
Explanation:
all i can say is not much can be permanent
Analyze the following chemical combinations
a) MgO
b)CaCl2
c) Na2O
When the gravimeter was invented.
Answer:
it was invented in 1960
Explanation:
it was descibed as a wooden instrument ideally suited for gravity programmes in areas of limited latitude and temperature variations
what would the molarity of a solution be if you diluted 350 mL of 3 M NaOH to 1.4 Liters?
Answer:
0.75 M
Explanation:
Equation for dilution:
M1V1 = M2V2
Make units the same:
350 mL = 0.35 L
Plug the numbers into the equation
(3M) (0.35 L) = (M2) (1.4L)
Divide both sides by 1.4L
Which gives you 0.75 = M2
Plz help it’s due very soon
Answer:
192g
Explanation:
so for this find out there moles of CH4 by moles=mass/mr
48/16=3 then use molar ratio 1:2 so times it by 2 which is 6 moles. then uses mass =moles*mr so 6*32=192g is the answer hope this helps to understand.
Answer:
64
Explanation:
How many joules would be required to change the temperature of 250.0 g of aluminum from 15.0°C to 75.0°C? The specific heat capacity of a luminum is 24.2J/g°C.
Para la siguiente reacción: 2NH 3(g) + CO 2(g) ———> (NH 2 ) 2 CO (l) + H 2 O (l) a) ¿Cuántos gramos de NH 3 se necesitan para formar 720 g de (NH 2 ) 2 CO? b) ¿Cuántos moléculas de agua se obtienen a partir de 9 litros de CO 2 ayudenme porfa
Answer:
a. 408g de NH3 son necesarios
b. 2.42x10²³ moléculas de agua se obtienen
Explanation:
a. Basados en la reacción, 2 moles de NH3 producen una mol de (NH2)2CO. Para resolver esta pregunta debemos convertir la masa de (NH2)2CO a moles. Estas moles a moles de NH3 y su respectiva masa:
Moles (NH2)2CO -Masa molar: 60.06g/mol-
720g * (1mol / 60.06g) = 11.99 moles (NH2)2CO
Moles NH3:
11.99 moles (NH2)2CO * (2mol NH3 / 1mol (NH2)2CO) = 23.98 moles NH3
Masa NH3 -17.031g/mol-:
23.98 moles NH3 * (17.031g / mol) = 408g de NH3 son necesarios
b. 1mol de CO2 produce 1mol de agua. Se debe convertir el volumen a moles usando PV = nRT. Estas moles = Moles de agua. 1mol = 6.022x10²³ moléculas:
Asumiendo STP:
PV = nRT; PV / RT = n
Donde P = 1atm a STP
V = 9L
R = 0.082atmL/molK
T = 273.15K a STP
1atm*9L / 0.082atmL/molK*273.15K = n
n = 0.402 moles CO2 = Moles H2O
Moléculas:
0.402 moles agua * (6.022x10²³ moléculas / 1mol) =
2.42x10²³ moléculas de agua se obtienen10. Which is an example of mechanical energy?*
(1 Point)
1. charges a computer battery
the energy stored in candy
2. a golfer hitting a golf ball
3. heat given off from your body
Answer: A golfer hitting a golf ball.
Explanation:
The atomic particles move more in this option than the others.
En la electrosis del cloruro de sodio (Na Ci) el cloruro es atraido por elcatodo. Falso o verdadero. Y porque?
Answer:
Falso
Explanation:
La electrólisis es la descomposición de una solución cuando la corriente continua se pasa a través de ella.
La corriente entra y abandona el electrolito a través de los electrodos. El electrodo positivo se llama el ánodo mientras el electrodo negativo se llama cátodo.
Los iones positivos se mueven hacia el cátodo, mientras que los iones negativos se mueven hacia el ánodo.
Dado que el cloruro es un ion negativo, se mueve hacia el ánodo y no hacia el cátodo.
The complete combustion of methane can be seen in the equation: CH4 + 2 points
202 - CO2 + 2H2O If 50 g of methane are reacted completely, which
statement describes the reaction? *
O The total mass of the reactants is 50 g.
O The total mass of products is 50 g.
O The total mass of products is less than 50 g.
The total mass of reactants is greater than 50 g.
Answer: The statement total mass of reactants is greater than 50 g is true.
Explanation:
According to law of conservation of mass, it is known that mass can neither be created nor it can be destroyed but it can only be transformed from one form to another.
For example, [tex]CH_{4} + 2O_{2} \rightarrow CO_{2} + 2H_{2}O[/tex]
Here, mass of methane is 50 grams but oxygen is also present over here whose mass isn't given. This means that total mass of reactants is greater than 50 grams.
Thus, we can conclude that the statement total mass of reactants is greater than 50 g is true.
Increasing the temperature of an endothermic reaction results in ____
· more reactants and products.
· no change in the quantities of reactants and products.
· more reactants and fewer products.
· fewer reactants and products.
· more products and fewer reactants.
Answer:
more reactents and products
three functions of the stem
The three functions of the stem:
To support the leaves,To conduct water, and To conduct minerals to the leaves.how do you think the particles in a substance behave when we give them more energy?
Answer:
they speed up
Explanation:
if you give more heat to a substance they gain more energy which makes them speed up. if you add more particles to a substance the particles gain more pressure which if inside a container can put more strain on the container
example - a balloon
the more air you put into a balloon, the more likely it is to burst because there are more particles colliding with the sides of the container and there is less space
if you put the balloon under a heat source it is more likely to burst because the heat gives the particles more energy which then makes them collide with the container more as they are moving around more
2. When we lift a stool, its ____________
A) gravitational potential energy is increased
B) gravitational potential energy is decreased
C) kinetic energy is decreased
D) gravitational potential energy remains unchanged
A.)
Standing on an elevated ledge would be more potential energy than standing on the ground. Same applies for anything else -- Including a chair!
what's radioactivity with a clear definition
why is it impostant during a science project to record measure
Answer:
it is important to be both accurate and precise. Accuracy represents how close a measurement comes to its true value. This is important because bad equipment, poor data processing or human error can lead to inaccurate results that are not very close to the truth.
Explanation:
hope this helps:)
Which of the following has kinetic energy?
Answer:
c ) a gymnast doing a cartwheel. ........
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Calculate how many methane molecules and how many carbon and hydrogen atoms are there in 25 g of Methane?
From the formula of methane it is clear that one mole of methane has 4hydrogen atoms. So, 37.6×1023 hydrogen atoms are there in 25.0 g of methane. Therefore, 9.4×1023methane molecules and 9.4×1023 hydrogen and 37.6×1023carbon atoms are there in 25.0 g of methane.
mark me brainliestt :))
How many moles of oxygen are required to react with methanol in order to produce 13 moles of formaldehyde?
Answer:
6.5 moles of Oxygen are required
Explanation:
Based on the reaction:
CH3OH + 1/2 O2 → CH2O + H2O
1 mole of methanol reacts with 1/2 moles O2 to produce 1 mole of formaldehyde and 1 mole of water.
Thus, to produe 13 moles of formaldehyde, CH2O, are needed:
13 moles CH2O * (1/2mol O2 / 1mol CH2O) =
6.5 moles of Oxygen are requiredRead the following graduated cylinder.
How many ML?
Answer:
12.8 mL
Explanation:
the bolded bar indicates a count of 5. counting from there would add up to 8/10ths of a mL.
is carbon dioxide from a fire extinguisher a physical or chemical change?
Answer:
Fire is a chemical reaction between oxygen and the fuel. If you want to put out a fire, just get rid of one of those three things – fuel, oxygen or heat. ...It also prevents oxygen from reaching the fuel. Most fire extinguishers work by separating the fuel from the oxygen.
Explanation:
Answer:
It is a chemical change
Explanation:
can i do chemistry project on effects of caffeine
Answer:
You do as you wish, but it isn't a terrible idea.
Explanation:
Caffeine is a drug that has been normalized in society for a long time. But it's effects on the nervous, digestive, excretory, and circulatory systems are a good basis to start a project off of.
Cheers! (:
1. What metal is oxidized in the most common dry cell?
zinc
iron
carbon
copper
Answer:
the correct answer is zinc
write a chemical equation for action of HBr on ethanol
answer:
hope this one helps have a great day !
lime water turns milky when carbon dioxide gas passed through it and on further exposure to carbon dioxide the milkiness disappear, why
Resultant carbon dioxide passed through limewater in the right tube, producing a milky solution due to precipitation of the insoluble suspension of calcium carbonate: ... The milkiness disappears since calcium bicarbonate is water-soluble.
3
.
The volume occupied by one mole of an ideal gas at 273K and 1.01x10% Pa is 22.4 dm'mol".
What volume of hydrogen, in dm", is produced when excess magnesium ribbon reacts with 100 cm?
of 2.00 mol dm hydrochloric acid?
Mg(s) + 2HCl(aq) → MgCl, (aq) + H2(g)
A.
0.100
B.
2.24
C.
4.48
D.
22.4
Answer:D
Explanation:
The electronegativities of carbon and sulfur are almost the same. Both elements form covalently bonded compounds with hydrogen. Why is hydrogen sulfide a polar compound while methane is a nonpolar compound?
a.Sulfur has a stronger attraction for electrons than does carbon
b.A hydrogen sulfide molecule has lone pairs of electrons
c.Sulfur forms ionic bonds with hydrogen while carbon forms covalent bonds
d.Sulfur ions are larger than carbon ions
Answer:
b. A hydrogen sulfide molecule has lone pairs of electrons
Explanation:
The presence of lone pairs indictates that the molecule will be polar unless its molecular geometry is linear or square planar. In the case of H2S, its shape is bent due to the lone pair and it is a slightly polar molecule.
A gas at constant volume has a pressure of 2.80 atm at 400. K. What will be the pressure of the gas at 360. K? (4 points)
2.52 atm
2.94 atm
3.11 atm
3.78 atm
Option first 2.52 atm
Answer:
Solution given:
pressure 1[P1]=2.8atm
pressure 2[P2]=?
temperature [T1]=400k
temperature [T2]=360k
now
By using gas equation
P1V1/T1=P2V2/T2
since
volume is constant
P1/T1=P2/T2
2.8/400=P2/360
P2=2.8*360/400
P2= 2.52
Answer:
It's 2.52
Explanation:
This requires Gay-Lussac's Law, in which the relationship is P1 / T1 = P2 / T2. "P" stands for Pressure and "T" is Temperature. The first pressure is 2.80, the first temperature is 400 Kelvin, the second pressure is unknown (that's what your solving for), and your second temperature is 360 Kelvin. Because you don't have the second pressure, your equation will look like 2.80 atm x 360 K / 400. This will tell you that the pressure of the gas at 360 K will be 2.52.
I also took the test and it was correct.
If the change in velocity increases, what happens to the acceleration during the same time period?
Acceleration decreases.
Acceleration increases.
Acceleration becomes negative.
Acceleration becomes steady.
Answer:
Acceleration decreases
Answer:
its b
Explanation:
Which of the following is a correct statement about water?
A)Hydrogen bonding causes water to be strongly cohesive.
B)Hydrogen bonding causes water to have a low surface tension.
C)Water is a universal solvent because polar and nonpolar solutes can dissolve in it.
D) Water is less dense as a liquid than as a solid because of changes in bond structure.
Answer:
D) Water is less dense as a liquid than as a solid because of changes in bond structure.
Explanation:
I hope I was able to help!
Have a nice day :)
The correct statements about water is that hydrogen bonding causes water to be strongly cohesive and is less dense as a liquid and solid.
What is hydrogen bonding?It is bonding in between the hydrogen atom and most electronegative atoms like flourine, chlorine, oxygen atoms, etc.
In water molecule hydrogen bonding is present in the form of intermolecular as well as intramolecular force and makes it more cohesive to get attracted towards each other.Water molecule has a high surface tension, as a result of which it is able to form a drop of water.Water is not a universal solvent, else it is a polar solvent and able to dissolve only polar molecules.It is also true that water is less dense as a liquid than as a solid because of changes in bond structure.Hence water is less dense as a liquid than as a solid because of changes in bond structure and hydrogen bonding causes water to be strongly cohesive.
To know more about water, visit the below link:
https://brainly.com/question/18681949