What is the oxidation number of each nitrogen atom (N) in calcium nitrate (Ca(NO3)2)? (3
points)
+2
+3
+5
+6
Carbon dioxide reacts with lithium hydroxide to produce lithium carbonate and water.
What mass of lithium hydroxide would be required to react with 1.00 x 103 grams of carbon dioxide?
Answer:
1.08827 x 10^3 g.
Explanation:
The equation for the reaction is:
2LiOH + CO2 ----> Li2CO3 + H2O
Using the molar masses:
CO2 = 12.011 + 2* 16 = 44.011.
LiOH = 6.94 + 1.008 + 16 = 23.948
S0 44.011 of CO2 reacts with 2*23.948 g of LiOH
1.00 *10^3 g CO2 reacts with 2*23.948 * 1.00 *10^3 / 44.011
= 1088.27 g LiOH.
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 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
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:
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?
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:
A gas at 55.0°C occupies a volume of 3.60L. What volume will it occupy at 30.0° C?
Pressure is constant
Answer:
3.33L
Explanation:
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!
Which one of the samples contains the most molecules?
o
A. 1 mol of CO2(g)
B. 1 mol of UF6(g)
O C. 1 mol CH3COOH()
D. They all have the same number of molecules
Answer: D is right
Explanation: One mole contains 6.0225 ·10^23 molecules
Despite of the substance
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.
To learn more about magnesium, follow the link;
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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
Which material would take the longest to cool off once heated?
Liquid water
Lead
Ice
Copper
Answer:
Liquid water
What element is 1s^2 2s^2 2p^6 3s2 3p^3
Answer:
Phosphorus
Explanation:
If you add up all the electrons (the exponents) it equals 15 which is the atomic number of phosphorus. And since stable atoms have the same number of protons and electrons it'll be phosphorus
Identify each of the following as a single bond, double bond, or triple bond.
_______ have cells that are all dried out.
Explanation: the answer plant seeds
not skin
are insert gases used in fluorescent
What are 2 diseases caused by coronaviruses?
.In a _____ relationship one variable increases and a second variable increases proportionally,
A. inverse relationship/inversely proportional
B. direct relationship/directly proportional
C. converse relationship/conversely proportional
Answer:
Explanation: b
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
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!
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
Consider the reaction below.
HI + H2O → H30++
Which is an acid-conjugate base pair?
O HI and H20
O H2O and Hž0+
OH30+ and I
O HI and
Answer:
HI and I-
Explanation:
Hello there!
In this case, according to the acid ionization of hydroiodic acid:
[tex]HI+H_2O\rightarrow I^-+H_3O^+[/tex]
Now, since the acid, HI, results in the conjugate base, I- and the base, H2O in the conjugate acid, H3O+, it is correct to assert that the acid-conjugate base pair is HI and I-
Best regards!
The acid-conjugate base pair in the reaction above is HI and I-. Details about conjugate base can be found below.
What is a conjugate base?A conjugate base is the substance formed when an acid loses or donates its proton or hydrogen ion.
According to this question, the following reaction is given:
HI + H2O → H30+ + I-
The acid in this reaction is HI while the conjugate base is I-.
Learn more about conjugate base at: https://brainly.com/question/12883745
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PLEASE HURRY I'M TIMED Where does the flow of energy begin in every ecosystem?
the consumers
the producers
the sun
the herbivores
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:
What volume of H2S is needed to produce 14.2 L of SO2 gas? The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O.
Answer:
14.2 L H2S
Explanation:
Mole ratio
2 mol H2S:2 mol SO2
We are just looking for volume, so the required amount is the same as the produced amount as long as the mole ratio is balanced.
The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
What is Mole ratio?Two factors can be used to identify stoichiometry problems: the information provided in the problem and he information that needs to be solved for, also known as the unknown.
The given and the unknown might both be reactants, could both be products, or could both be products with one of them acting as a reactant. Mole amounts can be used to express the substance quantities.
However, it is typical in a laboratory setting to calculate a substance's mass in grams to determine how much of it is present. A gaseous substance's volume can be used to express its quantity.
Therefore, The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
To learn more about balanced equation, refer to the link:
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An empty beaker weighs 20g and when filled with
Kensene weighs 60g. If the Volume of the kerosene is 15cm2 calculate
the density of the kerosene
Answer: The density of kerosene is [tex]2.7g/cm^3[/tex]
Explanation:
Density is defined as the mass contained per unit volume.
[tex]Density=\frac{mass}{Volume}[/tex]
Given : Mass of kerosene = mass of beaker with kerosene - mass of empty beaker = 60 g - 20 g = 40 g
Volume of kersone = [tex]15cm^3[/tex]
Putting in the values we get:
[tex]Density=\frac{40g}{15cm^3}[/tex]
[tex]Density=2.7g/cm^3[/tex]
Thus the density of kerosene is [tex]2.7g/cm^3[/tex]
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:
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.
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.