Answer:
1.06 moles of nitrogen gas will react with 3.20 moles of magnesium in the container.
Explanation:
[tex]3 Mg (s) + 1 N_2 (g) \rightarrow 1 Mg_3N_2 (s)[/tex]
Moles of magnesium heated = 3.20 mol
According to reaction, 3 moles of magnesium reacts with 1 mole of nitrogen gas, then 3.20 moles of magnesium will react with:
[tex]=\frac{1}{3}\times 3.20 mol=1.07 \text{ mol of }N_2[/tex]
1.06 moles of nitrogen gas will react with 3.20 moles of magnesium in the container.
what is the k expression for this reaction? plz help !
Answer:
K = [HI]² / [H₂] [I₂]
Explanation:
To write the expression of equilibrium constant, K, it is important that we know how to obtain the equilibrium constant.
The equilibrium constant, K for a given reaction is simply defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient. Thus, the equilibrium constant is written as follow:
K = [Product] / [Reactant]
Now, we shall determine the equilibrium constant for the reaction given in the question above. This can be obtained as illustrated below:
H₂(g) + I₂(g) —> 2HI (g)
K = [HI]² / [H₂] [I₂]
A box is pushed at a constant speed of 1.5 m/s for 12 seconds using a force of 50 Newtons across the floor. Calculate the distance the box travelled using. *
Answer:
Distance = 18 meters
Explanation:
Given the following data;
Force = 50 N
Speed = 1.5 m/s
Time = 12 seconds
To find the distance travelled;
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the equation;
[tex]Speed = \frac{distance}{time}[/tex]
Making distance the subject of formula, we have;
Distance = speed * time
Substituting into the formula, we have;
Distance = 1.5 * 12
Distance = 18 meters
Additionally, to find the workdone;
Workdone = force * distance
Workdone = 50 * 18
Workdone = 900 Joules
What is the mass of 2.053 moles of silver nitrate?
Answer:
Explanation:
Silver nitrate grams to moles
1 grams Silver Nitrate is equal to 0.0058867472248402 mole
How many moles is 17.6 g NaOH?
a
0.567 mol NaOH
b 227 mol NaOH
C
0.704 mol NaOH
d 0.440 mol NaOH
Answer:
[tex]\boxed {\boxed {\sf D. 0.440 \ mol \ NaOH}}[/tex]
Explanation:
To convert from moles to grams, the molar mass is used (mass of 1 mole). The values are the same as the atomic masses on the Periodic Table, but the units are grams per mole (g/mol) instead of atomic mass units.
1. Molar MassWe are given the compound sodium hydroxide (NaOH) and we need to look up the molar masses of the individual elements.
Na: 22.9897693 g/mol O: 15.999 g/molH: 1.008 g/molThe formula for the compound has no subscripts, so there is 1 mole of each element in 1 mole of the substance. We can simply add the molar masses.
NaOH: 22.9897693 + 15.999 + 1.008 = 39.9967693 g/molThis means there are 39.9967693 grams of sodium hydroxide in 1 mole.
2. Convert Grams to MolesUse the molar mass we found as a ratio.
[tex]\frac {39.9967693 \ g \ NaOH}{ 1 \ mol \ NaOH}[/tex]
Since we are converting 17.6 grams of NaOH to moles, we multiply by this value.
[tex]17.6 \ g\ NaOH *\frac {39.9967693 \ g \ NaOH}{ 1 \ mol \ NaOH}[/tex]
Flip the ratio so the units of grams of NaOH cancel.
[tex]17.6 \ g\ NaOH *\frac {1 \ mol \ NaOH}{ 39.9967693 \ g \ NaOH}[/tex]
[tex]17.6 *\frac {1 \ mol \ NaOH}{ 39.9967693}[/tex]
[tex]\frac{17.6 }{ 39.9967693} \ mol \ NaOH[/tex]
[tex]0.4400355406 \ mol \ NaOH[/tex]
3. RoundThe original measurement of grams has 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.
0.4400355406The 0 in the ten thousandths place (in bold above) tells us to leave the 0 in the thousandth place.
[tex]0.440 \ mol \ NaOH[/tex]
17.6 grams of sodium hydroxide are equal to 0.440 moles of sodium hydroxide.
Which property would most likely be the same when comparing two random samples of copper?
A mass
O B. volume
OC weight
OD. density
Answer:
melting point and conductivity
Explanation:
as long as both samples are copper, it will melt at the same time, aswell as conduct electricity the same.
PLEASE HELP I AM BEGGING YOU!!!!!!!!
Balancing Equations help (please explain)
Answer:
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
Explanation:
Which of the following lists describes characteristics of an acid?
Answer: Acids have a sour taste. Lemons, vinegar, and sour candies all contain acids. Acids change the color of certain acid-base indicators. Two common indicators are litmus and phenolphthalein. This are som Characteristics of acid.
Answer:
Sour tasteCorrosive (burn your skin and break down other materials)Increase the concentration of H+ when added to waterDissolve metalsDonate a hydrogen ionlow pHExplanation:
these are the characteristics of an acid.
hope this helps!
PLEASE help — I’m failing!
Determine each of the following for a 4.23 x 10-3 M solution of HCl:
a. H3o+
b. OH-
c. pH
d. pOH
Answer:
a.
[tex][H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M[/tex]
b.
[tex][OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M[/tex]
c.
[tex]pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37[/tex]
d.
[tex]pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63[/tex]
If you dilute 250 mL of 6.4 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?
Base A dissociates 25% in water. Base B dissociates 50%. Base C dissociates
75%. Which base is the WEAKEST conductor of electricity?
Answer:Base A is the weakest conductor electricity
Explanation:
Dissociation is a factor that affects electrical conductivity. The greater the percentage of dissociation for bases the stronger the conductivity of electricity.
Given that
Base A dissociates 25% in water
Base B dissociates 50%.
Base C dissociates 75%
We can conclude that Base A is the weakest conductor oelectricity since it has the lowest percentage of dissociation.
Please help me ASAP!!!!
Answer:
Explanation:
Determine the balanced chemical equation for the chemical reaction.
Convert all given information into moles (most likely, through the use of molar mass as a conversion factor).
Calculate the mole ratio from the given information.
Anyone know this question
You will be marked as brainlest if you are able to solve this question
Answer:
See Explanation
Explanation:
1) According to the question, the reactivity of a metal is measured by the temperature of the solution after reaction. The higher the temperature of the solution, the greater the reactivity of the metal. Based on this criterion, the metals can be arranged in an order of reactivity as follows;
Mg> Zn > Fe.
2) The equation of the reaction is;
Mg(s) + 2H^+(aq) ------>Mg^2+(aq) + H2(g)
If we consider the changes in oxidation number from left to right;
The oxidation number of Mg changed from zero to +2
The oxidation number of H changed from +1 to zero
Recall that a redox reaction is a reaction in which the oxidation number of species changes from left to right in the reaction. Hence this reaction is a redox reaction.
The reducing agent experiences an increase in oxidation number. In this case, Mg is the reducing agent.
The oxidation half equation is;
Mg(s) ------> Mg^2+(aq) + 2e
The reduction half equation is;
2H^+(aq) + 2e ------> H2(g)
What pairs will form IONIC bonds?
Choices are :
A.) Na and F
B.) Mg and Ge
C.) C and O
D.) N and N
What is the chemical name for CaCl2?
Calcium chlorine
O Calcium(I) chloride
O Calcium chloride
O Calcium(II) chloride
Balance the chemical equation using the drop-down options.
CaC2 +
A H20 --->
Ca(OH)2
A C2H2 +
Answer:
CaC2 + 2H20 ⇋Ca(OH)2 + C2H2
Explanation:
CaC2 + A H20 ---> Ca(OH)2 + A C2H2
This is calcium carbide reacting with water to produce calcium hydroxide and ethyne commonly called acetylene.
Let's now balance the equation.
CaC2 + 2H20 ⇋Ca(OH)2 + C2H2
If a gas is 0.8L at 900 mm Hg and 400K, what is the new pressure if the volume decreases to 0.5L and 300K?
Answer:
The new pressure of the gas is 1080 mmHg
Explanation:
The general equation provides a way to calculate the relationship between changesnp in volume, temperature and pressure of a given mass of gas.
The general gas equation is given as P1V1/T1 = P2V2/T2
Where P1 is initial pressure of gas
V1 is initial volume of gas
T1 is initial temperature of gas
P2 is final pressure of gas
V2 is final volume of gas
T2 is final temperature of gas
From the given question, P1 = 900 mmHg, V1 = 0.8 L, T1 = 400 K, P2 = ?, V2 = 0.5 L, T2 = 300 K
Making P2 subject of the general gas equations:
P2 = P1V1T2/V2T1
P2 = (900 × 0.8 × 300) / (0.5 × 400)
P2 = 1080 mmHg
Therefore, the new pressure of the gas is 1080 mmHg.
What is the pOH of
a
2.6 x 10-6 M H+ solution?
Answer:
pH = -log 2.6 x 10-6 M
pH = 5.585
pOH= 14 - 5.585 = 8.415
8.4 as 2 sig figs
What are the two groups the animal kingdom is divided into?
Answer:
Taking the animal kingdom as an example, we can see that it is split into two clear groups: Invertebrates - animals without a backbone. Vertebrates - animals with a backbone.
Explanation:
Definition: This is the energy that comes to Earth from the Sun.
Example: using the sun to dry your laundry hanging on the clothesline
Answer:
well to me it is called natural energy
Alex cut a pizza into 8 equal slices. He removed 2 of the slices of pizza. What is the measure of the angle made by the missing
Answer: 90 degrees.
Explanation:
Question is in picture! Due in 30 minutes!
Answer:
wheresthepicture.-
Explanation:
Answer:
don't see a picture
Explanation:
A gas has a volume of 300 mL in a rigid container at 50oC and 1.75 atm. What will be its pressure at 100K?
Answer:
Its pressure will be 0.54 atm at 100 K.
Explanation:
Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.
Gay-Lussac's law can be expressed mathematically as the quotient between pressure and temperature equal to a constant:
[tex]\frac{P}{T} =k[/tex]
Studying two different states, an initial state 1 and a final state 2, it is satisfied:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 1.75 atmT1= 50 °C= 323 K (being 0 C=273 K)P2= ?T2= 100 KReplacing:
[tex]\frac{1.75 atm}{323 K} =\frac{P2}{100 K}[/tex]
Solving:
[tex]P2= 100 k*\frac{1.75 atm}{323 K}[/tex]
P2= 0.54 atm
Its pressure will be 0.54 atm at 100 K.
Given the following electronic configurations, identify how many valence electrons each atom has.
A=
Element
Electron Configuration
Number
of
Valence
Electrons
B =
C=
Sodium
(Na)
152 2s 2p 3s
А
DONE
Oxygen (0)
1s 2s 2p
B
Iron (Fe)
1s 2s 2p 3s 3p 452
306
С
Answer:
sodium=atomic number 11 it electronic configuration is ,K=2, L=8,M=1 Valence is 1
oxygen= atomic number 8 it electronic configuration is K=2, L=6 Valence is 2
iron= atomic number 26 it electronic configuration is K= 2 L= 8,M=8 N=6 Valence 2
Answer: A=1
B=6
C=8
Explanation:
The student then takes a 1.00M stock solution of table sugar (sucrose C12H22O11) and mixes 0.305L of stock solution with additional distilled water to create a dilute solution with a total volume of 1.25L.
Explain how the student can determine the molarity of the resulting solution. Show a valid calculation for the final molarity. PLS HELP
Answer: The molarity of final solution is 0.244 M.
Explanation:
Given: [tex]M_{1}[/tex] = 1.00 M, [tex]V_{1}[/tex] = 0.305 L
[tex]M_{2}[/tex] = ?, [tex]V_{2}[/tex] = 1.25 L
Formula used to calculate the molarity f resulting solution is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\1.00 M \times 0.305 L = M_{2} \times 1.25 L\\M_{2} = \frac{1.00 M \times 0.305 L}{1.25 L}\\= 0.244 M[/tex]
Thus, we can conclude that the molarity of final solution is 0.244 M.
What is the role of a consumer in the flow of energy through a food chain?
Answer:
The role of consumers in an ecosystem is to obtain energy by feeding on other organisms and sometimes transfer energy to other consumers. Changes that affect consumers can impact other organisms within the ecosystem.
Explanation:
Hope this helped Mark BRAINLIEST!!!!
Consumers are organisms that obtain energy by eating other organisms. Consumers may consume either producers or other consumers. Consumers include animals.
What is food chain ?A food chain is a network of links in a food web that begins with producer organisms and ends with an apex predator, detritivore, or decomposer species.
A food chain also demonstrates how organisms are related to one another through the food they consume. Each trophic level is represented by a different level of a food chain.
Producers can produce their own food and energy, but consumers are not the same. Consumers are living things that must hunt, gather, and eat their food.
Thus, Consumers must eat in order to gain energy, or they will perish. Omnivores, carnivores, herbivores, and decomposers are the four types of consumers.
To learn more about the food chain, follow the link;
https://brainly.com/question/16065961
#SPJ6
correct name for Ti(SO4)2?
Answer:
Titanium(IV) Sulfide
Explanation:
PLEASE HELP ASAP!!
WHAT IS THE CYCLE OF OZONE IN THE STRATOSPHERE?
A. UV splits an oxygen molecule into two oxygen atoms, which combine with a oxygen molecule to create ozone.
B. An ozone molecule splits into an oxygen molecule and an oxygen atom.
C. An ozone molecule forms from and then splits into two oxygen molecules and two oxygen atoms.
D. A & B
what if the solubility of KNO3 at 60 celsius?
A. 28 grams of KNO3
B. 38 grams of KNO3
C. 45 grams of KNO3
D. 108 grams of KNO3
Answer:
D. 108 grams of KNO3(Potassium nitrate)