Answer:
Q = 1698.51 J
Explanation:
Given that,
Mass of water, m = 63.4 grams
It changes temperature from 22.3C to 28.7C.
We need to find the heat involved. The heat involved due to the change in temperature is given by :
[tex]Q=mc\Delta T[/tex]
Where
c is the specific heat of water, c = 4.186 joule/gram °C
So,
[tex]Q=63.4 \times 4.186 \times (28.7- 22.3)\\\\Q=1698.51\ J[/tex]
So, 1698.51 J of heat is involved.
PLEASE HELPPPP!!!!
WILL MARK BRAINLEST!!!
Answer:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
Formic acid, HCOOH, is a major component in ant bites. Calculate the mass, in grams of 3.14 x 1023
molecules of formic acid.
Answer:
23.97 grams.
Explanation:
First we convert 3.14 x 10²³ molecules into moles, using Avogadro's number:
3.14x10²³ molecules ÷ 6.023x10²³ molecules/mol = 0.521 molesThen we convert 0.521 moles of HCOOH into grams, using the molar mass of formic acid:
0.521 mol * 46 g/mol = 23.97 gThe answer is 23.97 grams.
Boiling water at sea level is hotter than boiling water in the
mountains.
example of cyclization
Answer:
yes
Explanation:
yes
K + Br2 → KBr
Identify a covalently bonded molecule in the reaction above that is a
REACTANT.
Answer: A covalently bonded molecule in the reaction
[tex]K + Br_{2} \rightarrow KBr[/tex] is [tex]Br_{2}[/tex].
Explanation:
A bond formed by sharing of electrons between two or atoms is called a covalent bond.
For example, bromine is a group 17 element and it has 7 valence electrons. It needs one more electron to complete its octet.
So, when one bromine atom chemically combines with another bromine atom then sharing of electrons takes place which leads to the formation of [tex]Br_{2}[/tex] molecule.
Hence, in the equation [tex]K + Br_{2} \rightarrow KBr[/tex]; [tex]Br_{2}[/tex] reactant is a covalently bonded molecule. A covlent bond is formed by two or more non-metal atoms that chemically combine together.
In a chemical equation, reactants are written on the left side and products are written on right side.
Thus, we can conclude that a covalently bonded molecule in the reaction
[tex]K + Br_{2} \rightarrow KBr[/tex] is [tex]Br_{2}[/tex].
What is the mass of 3.32 mols of N2
please help:))))
Answer:
92.96 g
Explanation:
In order to calculate the mass of any number of moles of a given substance, we need to know the substance's molar mass:
Molar mass of N₂ = (Molar Mass of N)*2We can look for the molar mass of N in any periodic table.
Molar mass of N₂ = 28 g/molNow we proceed to calculate the mass of 3.32 moles of N₂:
3.32 mol * 28 g/mol = 92.96 gTwo ways that salinity can increase
Here are the other two options
Why is helium lighter than lead? Please someone help !
Which of the following is common to both nuclear fusion and nuclear fission? PLZ I NEED ANSWER quickly
1.The fuel must be in the plasma state
2.A chain reaction is needed to start the reaction
3.Matter is converted into energy
4.Temperatures over one million degrees Celsius are needed for the reaction to occur
Answer:
I think number4.Nuclear fusion reaction is not possible in earth
Nuclear fusion and nuclear fission both have common to temperatures over one million degrees Celsius are needed for the reaction to occur. Therefore, option 4 is correct.
What is nuclear fusion ?A reaction known as nuclear fusion occurs when two or more atomic nuclei fuse to create new atomic and subatomic particles. Energy is released or absorbed depending on how much mass there is between the reactants and products.
Nuclear reactions that involve fusion and fission both yield enormous quantities of energy that can be used to generate power.
The two heavy isotopes of hydrogen, deuterium and tritium, are the primary fuels used in nuclear fusion. Only 0.0153% of natural hydrogen is deuterium, which may be easily and cheaply produced from seawater. Lithium, which is also widely distributed in nature, can be used to create tritium.
Thus, option 4 is correct.
To learn more about nuclear fusion, follow the link;
https://brainly.com/question/12701636
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if a soda can is opened and left on a scale fot 24 hours how might the final mass change?
Answer: If a soda can is opened and left on a scale for 24 hours then the final mass change will decrease.
Explanation:
A soda can is like any other carbonated beverage that contains carbon dioxide dissolved under pressure. So, when a soda can is opened then there will occur a release in pressure due to which excess of carbon dioxide gas moves out of the solution in the form of bubbles.
When soda can is remained open for 24 hours then additional carbon dioxide moves slowly into the air. As a result, there will occur a decrease in final mass change.
Thus, we can conclude that if a soda can is opened and left on a scale for 24 hours then the final mass change will decrease.
Density measurements can be used to analyze mixtures. For example, the density of solid sand (without air spaces) is about 2.84 g/mL. The density of gold is 19.3 g/mL. If a 1.00 kg sample of sand containing some gold has a density of 3.10 g/mL (without air spaces), what is the percentage of gold in the sample
Answer:
Following are the responses to the given question:
Explanation:
Let S = solid sandy mass inside the blend
Let G = gold mass in such a blend
We search that percent G by mass
Mixture density = total blend mass / total blend volume = 3.10 g/mL
Mixture sum [tex]= S + G = 1 \ kg = 1000\ g[/tex]
Complete mixing volume = sand volume + gold volume volume
Complete mixing volume [tex]= (\frac{sand\ mass}{sand \ density}) + (\frac{gold\ mass}{gold \ density})[/tex]
Total mixture volume:
[tex]= (\frac{S}{2.84}) + (\frac{G}{19.3})\\\\ = \frac{(19.3 S + 2.84 G)}{54.812\ mL}[/tex]
[tex]\text{Mixture Density} = \frac{\text{mass mixture}}{\text{mixture volume}}[/tex]
[tex]= 3.10 \frac{g}{mL} \\\\ \to 3.10 = \frac{1000 \ g}{ \frac{(19.3 S + 2.84 G)}{ 54.812}}\\\\\to 19.3 S + 2.84 G = 17681[/tex]
When
[tex]S + G = 1000 \ g[/tex]
Solving equation:
[tex]\to 19.3 S + 2.84 G = 17 681\\\\\therefore \ S + G = 1000 \ g\\\\\to 19.3 S + 2.84 G = 17 681\\\\\to -2.84S -2.84 G = -2840\\\\----------------\\\\\to 16.46S = 14 841\\\\\to S = 901.7 g \ SanD[/tex]
When
[tex]\to S+ G = 1000\\\\\to G = 1000 - 901.7\ g\\\to G = 98.3 g \ GOLD[/tex]
If the temperature of 15 grams of water changes from 21C to 24C, how many joules of heat were involved? Show work
Answer:
189 Joules
Explanation:
Applying,
Q = cm(t₂-t₁)............. equation 1
Where Q = Heat, c = specific heat capacity of water, m = mass of water, t₁ = Initial Temperature, t₂ = Final temperature.
From the question,
Given: m = 15 grams = 0.015 kg, t₁ = 21 °C, t₂ = 24 °C
Constant: c = 4200J/kg.°C
Substitute these values into equation 1
Q = 0.015×4200×(24-21)
Q = 0.015×4200×3
Q = 189 Joules
A sample of carbon atoms were chemically combined with a sample of oxygen atoms to yield the compound carbon dioxide. The sample of oxygen atoms was artificially manufactured to have a 3:1 ratio of
Answer:
The law companies that value excessive ethics comply with the legal guidelines
PLS HELP! WILL GIVE BRAINLIST!
Assume there are 1000 units of energy in the producer level of the energy pyramid. How many units of energy are available at each of the three consumer levels? Show your calculations. Hint first, change the percentages to decimals.
Answer:
Energy retained at consumer level 1 - units
Energy retained at consumer level 2 - units
Energy retained at consumer level 3 - units
Explanation:
Pcl3+H2O=H3PO3+Hcl=?
Answer:
PCl3 + 3H2O → HPO(OH)2 + 3HCl. Phosphorus(III) chloride react with water to produce phosphorous acid and hydrogen chloride.
Explanation:
Answer:
the answer is stop studying,enjoy your life,party all night,bite like a dog and purr like a cat thats it
Explanation:
i dunno
Consider this reaction: HCO3− + H2S → H2CO3 + HS− Which is the Bronsted-Lowry base? H2S HCO3- HS– H2CO3
Answer:
hco3
Explanation: bc i said so
Please hurry!
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Please answer the question ASAP
Please help me!
which of the following is always altered when a substance undergoes a chemical change?
A) mass of the substance
B) arrangement of the atoms composing the substance
C) color of the substance
D) state of matter of the substance
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Instructions
Balance each equation.Be sure to show off your lists! Remember you cannot add or place off coefficients in the middle of a chemical formula.
Example
2Na + MgF2 —-> 2NaF + 2Mg
Na= 2. Na=2
Mg= 1. Mg=1
F= 2. F=2
3. Cl₂ + 2KI --> 2KCl + I₂
Cl = 2 Cl = 2
K = 2 K = 2
I = 2 I = 2
4. 2NaCl --> 2Na + Cl₂
Na = 2 Na = 2
Cl = 2 Cl = 2
5. 4Na + O₂ --> 2Na₂O
Na = 4 Na = 4
O = 2 O = 2
6. 2Na + 2HCl --> H₂ + 2NaCl
Na = 2 Na = 2
H = 2 H = 2
Cl = 2 Cl = 2
7. 2K + Cl₂ --> 2KCl
K = 2 K = 2
Cl = 2 Cl = 2
How many structural isomers does C5H12 have?
a. two
b. three
c. one
d. five
Answer:
three structural isomers
Pentane (C5H12) is an organic compound with five carbon atoms. Pentane has three structural isomers that are n-pentane, Iso-pentane (methyl butane) and neopentane (dimethylpropane).
The major products obtained from the following sequence of reactions are:
(CH 3) 2 CHCH 2 N(CH 2 CH 3 ) 2 →CH 3 I H 2 O→ Ag 2 O →heat products.
Answer:
The answer is "Option C".
Explanation:
Please find the complete question and its solution in the attached file.
using Hoffman's elimination reaction.
Hydrocarbons in which carbon atoms are connected by only single bonds in straight chains or branched chains are called
a. alkanes.
b. alkynes.
c. alkenes.
d. aromatic hydrocarbons.
Answer:
Hydrocarbons in which carbon atoms are connected by only single bonds in straight chains or branched chains are called
a. alkanes.
Identify find a functional groups as indicated
why does glucose more soluble in water comparing to benzoic acid?
Answer:
Because it desolves in water very well
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At room temperature a mystery substance is observed to take the shape of its container and can expand or be compressed to change its volume this mystery substance is most likely a:
A) liquid
B) solid
C) crystal
D) gas
Answer:
Gas
Explanation:
This is because a gas is the only substance in the given options which can be expanded or compressed as its particles are far away from each other. They can also take the shapes of the containers they are put in.
HOPE THIS HELPED
across the period the size of an atom decreases and effective nuclear charge
Answer:
Atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant. Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital.
Explanation:
Please help me. Question is post on photo.
Answer:
London Dispersion Only
Explanation:
BF3 is non polar and nonpolar molecules only have london disperion forces
What is the pH of a .00034 M of HCl solution?
3.5
5.3
3.0
5.0
Answer:
pH = 3.5
Explanation:
HCl is a strong acid, so we can use this little formula to find the pH of the solution:
pH = -log[H3O+]
(where H3O+ is the strong acid, HCl)
So we just plug in the molarity for the concentration of the acid...
pH = -log(0.00034)
Solve.
pH = 3.468521083
And apply sig. figs....
pH = 3.5
Substances that are physical combinations of two or more different types of matter are known as
Answer:
A mixture!
Explanation:
Mixtures are a substance made of combining two or more different kinds of matter :)
Hope this helped!
Which group on the periodic table is a noble gas most likely to bond with?
Answer:
The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.Explanation: