Answer:
Benzyl Acetate C9H10O2
Explanation:
Answer:
Np
Explanation:
No problem m8374893724873284972384823749832748937249873298478274923874983249872398479832497234
Calculate the mass of magnesium chloride you would need to dissolve in 4dm of water to
make a 0.9g/dm solution.
Question: Calculate the mass of magnesium chloride you would need to dissolve in 4dm³ of water to
make a 0.9g/dm³ solution.
Answer:
3.6 g
Explanation:
From the question,
Density of magnesium (D) = Mass of magnesium (m)/Volume of magnesium(V)
D = m/V............... Equation 1
Make m the subject of the equation
m = D×V............. Equation 2
Given: D = 0.9 g/dm³, v = 4 dm³
Substitute these values into equation 2
m = 0.9×4
m = 3.6 g.
Hence the mass of magnesium is 3.6 g.
Which material would take the longest to cool off once heated?
Liquid water
Lead
Ice
Copper
Answer:
Liquid water
Determine the pH of a 0.015 M HNO3 solution.
Answer:
0.015 M HNO3 = 0.015 M H3O+ pH = -log(0.015) = 1.82 [OH -] = 1.0 x 10 -14/0.015 M = 6.7 x 10 13 Check: HNO3 is a strong acid, so we expect the pH to be low and the [OH ] to be small
The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Thus the pH of 0.015 M HNO3 is 1.82. pH is a unitless quantity
What is pH?pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7
The concentration of HNO₃ is 0.015 M
Dissociation of HNO3 is
HNO3 +H₂O [tex]\rightarrow[/tex] H₃O⁺+NO₃⁻
So the concentration of H₃O⁺=0.015 M
Mathematically,
pH=-log[H⁺]
Substituting the values
pH=-log[0.015 ]
= 1.82
Thus the pH of 0.015 M HNO3 is 1.82
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What best explains the reason Jeff sees a double image of the trees on the water
Answer:
Nerve or muscle damage in the eye might cause double vision. Each eye creates its own image of the environment. The brain combines the representations from each eye and perceives them as one clear picture. Damage to the muscles that move the eyes or the nerves that control eye movement can create a double image.
Explanation:
are insert gases used in fluorescent
Convert 230 centimeters into yards
It would be 2.515 yards. This is because to convert cm into yards, you would need to divide the length value by 91.44 so in your case, it would be 230÷ 91.44 which equals 2.51531.
Hope that helps!
Predict the reactivity of beryllium compared with magnesium give a reason for your answer use the periodic table
Answer:
Beryllium metal is relatively unreactive at room temperature, particularly in its massive form. Magnesium is more electropositive than the amphoteric beryllium and reacts more readily with most of the nonmetals.
Explanation:
When it comes to the ease with which a positive ion or cation of the metal can form, beryllium is less reactive than magnesium.
What is magnesium ?The chemical element magnesium has the atomic number 12 and the letter Mg as its symbol. It is a glossy, gray metal with a low melting point, high chemical reactivity, and a low density. It only naturally occurs in mixtures with other elements, just like the other alkaline earth metals, and it almost always has an oxidation state of +2.
At room temperature, beryllium metal is largely non-reactive, especially in its massive form. Magnesium interacts more quickly with the majority of nonmetals because it is more electropositive than amphoteric beryllium.
Due to the electron being removed being in the 3-level rather than the 2-level and being further away from the nucleus's attraction, the first ionization energy of magnesium is lower than that of beryllium.
Thus, When it comes to the ease with which a positive ion or cation of the metal can form, beryllium is less reactive than magnesium.
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47.9 ml hrdrogen is collected at 26° Celsius and 718 torr. Find the volume occupied at STP
Answer:
The volume at STP is 41.3mL
Explanation:
To solve this question we must find the volume using the combined gas law. The equation is:
P1V1 / T1 = P2V2 / T2
Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of the gas.
P1 = 718torr
V1 = 47.9mL
T1 = 26°C + 273.15 = 299.15K
P2 = 760torr at STP
V2 = ?
T2 = 273.15K at STP
Replacing:
718torr*47.9mL / 299.15K = 760torr*V2 / 273.15K
41.3mL = V2
The volume at STP is 41.3mL
what is the heating curve on the horizontal line
Answer:
The plateaus or horizontal lines on the graph represent the transition between states of the sample. The first plateau represents the melting (or transition from solid to liquid) and the second plateau represents boiling (or transition from liquid to gas).
Explanation:
PLEASE HELPPPPPP?????
URGENT PLEASEEEE HELP
A functional group is a specific arrangement of atoms in an organic compound that is capable of characteristic reactions
Is this true of false
PLEASE HELPP NO LINKSS
Answer:
True
Explanation:
What’s the correct answer ?
Answer:
Explanation:
i think c
A solution consists of 10.3 g of the nonelectrolyte glucose, C6H12O6, dissolved in 250. g of ethanol. What is the new freezing point of the ethanol solution
Answer:
-114.6°C is the new freezing point
Explanation:
The addition of a solute to a pure solvent produce the decreasing in the freezing point (Freezing point depression, Colligative property). The equation to find the new freezing point of the mixture is:
ΔT = Kf*m*i
Where ΔT is the change in the freezing point,
Kf is the freezing point depression constant of the solvent = 1.99°C/m
m is molality of the solution (Moles of solute / kg solvent)
i is Van't Hoff factor = 1 for nonelectrolytes
Molality of the solution is:
Moles glucose -Molar mass: 180.156g/mol-
10.3g * (1mol / 180.156g) = 0.05717 moles
kg of solvent:
250g * (1kg / 1000g) = 0.250kg
Molality = 0.05717 moles / 0.250kg =
0.2287m
ΔT = 1.99°C/m*0.2287m*1
ΔT = 0.46°C
As the freezing point of ethanol is -114.1°C, the freezing point of te solution is:
-114.1°C - 0.46°C
= -114.6°C is the new freezing point
An unknown gas has pressure, volume and temperature of 0.9 atm 8L and 120°C respectively. How many moles of gas are present?
Answer:
n = 0.223 mol.
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to approach this problem via the ideal gas law, which involves the pressure, moles, temperature and volume of the gas:
[tex]PV=nRT\\\\[/tex]
Thus, by solving for moles we obtain:
[tex]n=\frac{PV}{RT}[/tex]
Therefore, we plug in the given volume, temperature (in Kelvins) and pressure to obtain:
[tex]n=\frac{0.9atm*8L}{0.08206\frac{atm*L}{mol*K}*(120+273)K} \\\\n=0.223mol[/tex]
Best regards!
how many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide
a. 3
b. 4
c. 6
d. 2
One mole of NaOH = 40g NaOH
One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in water
One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in wateraccording to the given data,
One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in wateraccording to the given data,we have 6 moles of NaOH so we need 6 litres of Water olto prepare 1M Solution
Question #1: Identify the type of Mutation below
Original
TTCGATA
TTGATA
Copy
Insertion
Substitution
Deletion
Answer:
Deletion
Explanation:
A mutation refers to a change in the DNA sequence. This means that the original sequence of bases in the DNA has been altered permanently.
There are three types of DNA mutations; base substitutions, deletions and insertions.
In the particular case of this question, the original is TTCGATA while the copy is TTGATA. If you look closely at the two, you will notice that the C has been omitted. This is an example of deletion.
Short Answer/Essay
Note: Your teacher will grade your responses to questions 19 and 20 to ensure you receive proper credit for your answers.
What is global warming? What can people do to reduce global warming?
Answer:
lol global warming is the gradual increase in the temperature of the earth and its atmosphere. this is do to the greenhouse effect caused by increased levels of carbon dioxide.
Explanation:
common knowledge
A certain automobile contains 4 tires, 2 headlights, 1 steering wheel,
and 6 spark plugs. How many of each part will be required to build 17 of
these cars?
Answer:
143 parts I think probably not
2Fe2O3 + C → Fe + 3CO2 You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2?
A student observed pond water through a field microscope. He saw several organisms moving around in the water. His teacher explained that bacteria are too small to be seen with the limited magnification of the field microscope. The unicellular organisms the student observed were most likely from the kingdom -
Answer:
Kingdom Monera.
Explanation:
The unicellular organisms the student observed were most likely from the Kingdom Monera because in this kingdom, unicellular organisms are included which are prokaryotic in nature. Monera is a Greek word means "single" is a kingdom that contains organisms that are made up of one cell and having a prokaryotic cell means having no nuclear membrane and we know that bacteria is also a unicellular organism and prokaryotic in nature.
Write a sentence or mathematical expression that relates each of the
following:
-mass to moles
-moles to mass
-moles to particles
-particles to moles
Answer:
Mass to moles: mass/molar mass=mole
Moles to mass: moles x molar mass = mass
Moles to particles:1mole = 6.022x10^23 particles
Particles to moles: 1 particle =1/(6.022x10^23) mole
Explanation:
What volume of water is required to prepare 1.50M solution with 2.55 moles of NaCl?
Answer:
?
Explanation:
Molarity is the molar concentration of the moles in a solution. The volume of water required for preparing 1.50 M NaCl solution is 1.7 L.
What is volume?Volume is the number of moles of solute present in a molar concentration of a solution.
Molar concentration is given as,
[tex]\rm Molarity (M) = \dfrac{\text{moles of solute}}{\text{litres of solution}}[/tex]
Given,
Molarity of sodium chloride = 1.50 M
Number of moles of sodium chloride = 2.55 mol
Substituting values in the above equation the volume is calculated as:
[tex]\begin{aligned}\rm Volume &=\rm \dfrac{moles}{molarity}\\\\&= \dfrac{2.55}{1.50}\\\\&= 1.7 \;\rm L\end{aligned}[/tex]
Therefore, 1.7 L of water is required.
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True/False: Sometimes people have to make modify or make adjustments to the land so that we can use it to farm.
What is the oxidation number of each nitrogen atom (N) in calcium nitrate (Ca(NO3)2)? (3
points)
+2
+3
+5
+6
Which of the selections completes the following nuclear reaction?
Answer:
najsbsbsmnshzhskwjzhhsbsbsbsbzbbsnzn
hsnznzkskzjbxbs
gasjhsjsbabakjahajakqjahsvhwksbxbwhsjkxjsjshshshshshhshshshsjshxhsbsbsbsbhshshdbdbbdbdbdhbsjajshshshsjsksksjsjsjjsbsksshshssgsgsbsbvsgsbsjsksjsjxjxjksksjgshkajahsgshsjsjabavsvshwhsggehsjsjsjdnsjajs
Answer:
uhh the Neutron i guess lol you didn't give any choices or explanation
Explanation:
4 InS03 + 3 RSC2 --> 2 In Sc3+3 RS04
Using the balanced equation, if you had 4.3 moles of InSoz, what volume would RS04 occupy at
STP?
Answer:
Explanation:
How many moles of carbon dioxide are produced from the reaction of six moles of oxygen?
Explanation:
Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced. Thus 6 moles of are produced.
Answer: 6
Explanation:
Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced. Thus 6 moles of are produced.
An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?
A single proton has the charge of +1.
A neutron is neutral and has a charge of 0
A single electron has the charge of -1
Since the nucleus contains both protons and neutrons, with neutrons have charge of 0 and protons with +1, the total charge of the nucleus would be 25 * 1 which is +25.
Answer:
25+
Explanation:
25+ = the number of protons in the nucleus
During the process of photosynthesis, plants use energy from the Sun to transform carbon dioxide from the air into
OA. soil and molecules of sugar.
OB. protein and minerals,
OC.
oxygen gas and molecules of sugar
OD
minerals and liquid carbon dioxide.
OA soil and molecules of suger
A hot air balloon has a volume of 2,510,000L at a pressure of 105 kPa and 122 degrees Celcius. If the balloon increased to 2,600,000L and the temperature increased to 150 degrees Celcius, what would be the pressure of the balloon?
Answer: The new pressure of the balloon is 108 kPa
Explanation:
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 105 kPa
[tex]P_2[/tex] = final pressure of gas = ?
[tex]V_1[/tex] = initial volume of gas = 2510000 L
[tex]V_2[/tex] = final volume of gas = 2600000 L
[tex]T_1[/tex] = initial temperature of gas = [tex]122^0C=(122+273)K=395K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]150^0C=(150+273)K=423K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{105\times 2510000}{395}=\frac{P_2\times 2600000}{423}[/tex]
[tex]P_2=108kPa[/tex]
The new pressure of the balloon is 108 kPa