Answer:
The electromagnetic force is an important force in the chemical and biological sciences, as it is responsible for molecular connections like ionic bonding and hydrogen bonding.
Is this balanced ?2 Fe(NO3)3 + 3 MgSO4 → 3 Mg(NO3)2 + 2 Fez(SO4)3
it shoudl be : 2Fe(NO3)3 + 3MgSO4 → 3Mg(NO3)2 + Fe2(SO4)3
(the difference is Fe2(SO4)3 has no coefficient)
45.89 g of Hydrogen atoms contains how many moles of Hydrogen
atoms?
Please show work it’s due in 5 minutes I’ll give brainliest
2.63 g
Explanation:
One way to approach this problem is to determine the percent composition of hydrogen in water.
HEELPPP!!!
What is the charge of the nucleus?
a) negative
b) positive
c) neutral
Answer:positive
Explanation:
Answer:
Positive.
Explanation:
Since a neutral charge won't cancel out a positive charge, the overall charge of a nucleus is positive.
A friend insists that using an electric drill in his flooded basement is safe because, he says, “Water doesn’t conduct electricity.” What would you say to your friend?
Answer:
I will say to my friend that
pure or distilled water does not conduct electricity
but instead of this.
water conduct electricity
be aware of it
What type of reaction takes place in the equation below:
C2H5OH + O2 CO2 + H2O
Answer:
Im pretty sure its Combustion
In a victor Mayer's experiment 0.33g of organic liquid of molecular weight 120g/mol was vaporized at 293k and 1.013 *10 N/ m calculate the vol in cm3 of air displaced
Answer:
66.13 cm³
Explanation:
Using the ideal gas equation, PV = mRT/M where P = pressure = 1.013 × 10⁵ N/m², V = volume of liquid vaporized = volume of air displaced, m = mass of organic liquid = 0.33 g, M = molar mass of gas = 120 g/mol and R = molar gas constant = 8.314 J/mol-K and T = temperature at vaporization = 293 K.
PV = mRT/M
So, V = mRT/PM
Substituting the values of the variables into the equation, we have
V = 0.33 g × 8.314 J/mol-K × 293 K/(1.013 × 10⁵ N/m² × 120 g/mol)
V = 803.881/121.56 × 10⁻⁵ m³
V = 6.613 × 10⁻⁵ m³
V = 6.613 × 10⁻⁵ × 1m³
V = 6.613 × 10⁻⁵ × 10⁶ cm³
V = 6.613 × 10 cm³
V = 66.13 cm³
A sample of a pure element has a mass of 45.6g and contains 4.19 x 10 23 atoms. Identify the element.
ZINC
Explanation:To identify the element based on the informartion given, we have to find the molar mass since this mass is unique to each element.
Molar mass = mass ÷ moles
We already know the mass based on the question, as such we now need to find the # of moles.
Since 1 mole contains 6.02214 × 10²³ atoms
then let x moles contain 4.19 × 10²³ atoms (given in the question)
⇒ x = (4.19 × 10²³ atoms × 1 mol) ÷ 6.02214 × 10²³ atoms
x = 0.69577 mol
Now that we have the moles we can substitute it into the molar mass equation and solve for the molar mass.
⇒ molar mass = 45.6 g ÷ 0.69577 mol
⇒ molar mass ≈ 65.54 g/mol
This molar mass is closest to that of ZINC.
(GIVING BRAINLIEST)
....
Answer:
C
Explanation:
Because a planet is a celestial body distinguished from the fixed stars by having an apparent motion of its own (including the moon and sun), especially with reference to its supposed influence on people and events.
Answer:
it is the second one ;)
Explanation:
please help, i will give brainlist, I'm desperate
Answer:
hydrogen
Explanation:
this is a reaction between to elements your other element would consist of deuterium but since you pick one you pick the only elemnt that creates this newclear fusion.
The teacher asked the students to design an experiment that would demonstrate that temperature will affect the pressure of a gas. Which of the
following would be a valid experiment that shows the correct relationship between gas temperature and pressure?
The correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.
How are pressure and temperature of a gas related ?
According to Gay lussac's law, the temperature and pressure of a gas are directly proportional to each other, provided the volume is constant.
When the temperature of a gas is increased, the molecules gain more kinetic energy and hence the frequency of them hitting the walls of the container increases which basically implies that the pressure increases.
On the other hand when the temperature is low, the molecules do not have substantial kinetic energy to hit the walls of the container frequently, that is the pressure decreases.
When the bicycle tires were kept out in the winter, the low temperature decreased the air pressure inside the tires. While when they were warmed at room temperature, the pressure inside the tires increased.
Therefore, the correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.
To know more on Gay lussac's law, click on
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How many moles are in 58.6 L of N2gas at STP?
Answer:
[tex]\boxed {\boxed {\sf 2.62 \ mol \ N_2}}[/tex]
Explanation:
The relationship between moles and gases is unique. Regardless of the type of gas, there will always be 22.4 liters of gas in 1 mole, as long as it's at STP (standard temperature and pressure).
We can make a ratio using this information.
[tex]\frac {22.4 \ L \ N_2}{ 1 \ mol \ N_2}[/tex]
Multiply by the given number of moles.
[tex]58.6 \ L \ N_2 *\frac {22.4 \ L \ N_2}{ 1 \ mol \ N_2}[/tex]
Flip the fraction so the liters of nitrogen cancel.
[tex]58.6 \ L \ N_2 *\frac {1 \ mol \ N_2}{ 22.4 \ L \ N_2}[/tex]
[tex]58.6 *\frac {1 \ mol \ N_2}{ 22.4 }[/tex]
[tex]\frac {58.6 \ mol \ N_2}{ 22.4 }= 2.61607143 \ mol \ N_2[/tex]
The original measurement of liters has 3 significant figures, so our answer must have the same.
For the number of moles calculated, 3 sig figs is the hundredth place. The 6 in the thousandth place tells us to round the 1 to a 2.
[tex]2.62 \ mol \ N_2[/tex]
58.6 liters of N₂ gas at STP is equal to about 2.62 moles.
helpppppp plssssssss does anyone know this ? what type of structure is shown in the diagram?
Answer:
the structure of atom which discovered by Thomson the describe on how the sub-atomic particles are arranged in an atom
If you divided one regtangle into ten smaller regtangles and then each of those into ten each of the smallest regtangles is?
Answer:
0.01.
Explanation:
This is because, if you divided one rectangle by ten, it will give 0.1
That is 1/10 = 0.1
If each of the smaller rectangles is divided by 10.
It will be 0.1/10 which will be equal to 0.01.
The rectangles will be 0.01 each.
Using the reaction C12H22O11 + 12 O2 ->12CO2 + 11H2O (e). How many grams of carbon dioxide can be produced from 456.7g sucrose
Answer:
704.6 g CO2
Explanation:
MM sucrose = 342.3 g/mol
MM CO2 = 44.01 g/mol
g CO2 = 456.7 g sucrose x (1 mol sucrose/MM sucrose) x (12 moles CO2/1 mol sucrose) x (MM CO2/1mol CO2) = 704.6 g CO2
Which of the following do all substituted hydrocarbons have in common?
They all have halogen groups.
B)
A hydrogen on an alkyl chain has been replaced by a heteroatom.
C)
They all contain oxygen.
D)
They're short-chain hydrocarbons.
Answer:
C they all have oxygen
Explanation:
look they all have oxygen , carbon has it so does the
What type of galaxy is pictured?
A.) elliptical
B.) irregular
C.) lens
D.) spiral
can someone explain how to do this, I don't understand?
Answer:
a) 2
b) 3
c) 5
d) 6
Explanation:
True or false: Sometimes older rocks end up on top of younger rocks.
Answer:
true
downstream to the riverbed. However, the most common mechanism to produce older rocks on top of younger is by thrust faulting. Thrust faults form where rocks are being compressed, usually by plate tectonic mechanisms. Thrust faults rip up older strata and pile it on top of younger rocks.
Explanation:
A scientist is measuring dissolved oxygen levels in a lake over a period of one year. Which collection of samples would ensure consistency regarding these measurements?
A. samples from the same locations and at the same depths each week
B. samples from different locations and at different depths
C. samples from the same locations but at different depths each month
D. samples from different locations at the same depth and at the beginning and end of the year
Answer: A
Explanation:
11.
Which of these statements is true about the two graphed parallelograms?
A
B
8
6
A
4
B'
D
C
2
D
C'
-6
2
4
6
-2.
-2
-4
-6
-8 +
A
They are similar, because one can be obtained by dilating the other about the origin with a scale factor of
Answer:
Explanation:
dfghyuiop[]5565677dam u baddie no comparing
Ammonium perchlorate NH4ClO4 is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N2, chlorine gas Cl2, oxygen gas O2, water H2O, and a great deal of energy. What mass of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate? Be sure your answer has the correct number of significant digits.
Answer: 0.99 grams of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles of } NH_4ClO_4=\frac{3.3g}{117.5g/mol}=0.028moles[/tex]
The decomposition of ammonium perchlorate is :
[tex]2NH_4ClO_4\rightarrow Cl_2+N_2+2O_2+4H_2O[/tex]
According to stoichiometry :
2 moles of [tex]NH_4ClO_4[/tex] produce = 1 mole of [tex]Cl_2[/tex]
Thus 0.028 moles of [tex]NH_4ClO_4[/tex] produce=[tex]\frac{1}{2}\times 0.028=0.014moles[/tex] of [tex]Cl_2[/tex]
Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.014moles\times 71g/mol=0.99g[/tex]
Thus 0.99 grams of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate
Cuáles son el pHy PoH de una solución cuya concentración de iones hidronio [H+]es de 0.000475 M de acido sulfurico?
Earth
Moon
SUN
Based on the diagram above, what moon phase would most likely be occurring?
so, a gas, and an
ТВУ папіѕег на
3. Predict. If Joe wanted the reaction to "go faster," how could he change the procedure?
a) use a large sized piece of the solid Cu
b) lower the initial temperature below 25 °C for the liquid reactant, HNO3
c) use a 0.5 M HNO3 instead of 2.0 M HNO3
d) cut the large sized Cu solid into smaller sized pieces
Answer:
d) cut the large sized Cu solid into smaller sized pieces
Explanation:
The aim of the question is to select the right condition for that would increases the rate of the reaction.
a) use a large sized piece of the solid Cu
This option is wrong. Reducing the surface area decreases the reaction rate.
b) lower the initial temperature below 25 °C for the liquid reactant, HNO3
Hugher temperatures leads to faster reactions hence this option is wrong.
c) use a 0.5 M HNO3 instead of 2.0 M HNO3
Higher concentration leads to increased rate of reaction. Hence this option is wrong.
d) cut the large sized Cu solid into smaller sized pieces
This leads to an increased surface area of the reactants, which leads to an increased rate of the reaction. This is the correct option.
what type of solid is H20 (ice)?
Answer:
Ice is a molecular and crystalline solid.
Explanation:
Water freezes at 0 degrees Celsius; it has strong molecular bonds between the hydrogen and oxygen atoms of each molecule, and weaker intermolecular bonds between each molecule of water. The polarity of the molecules helps align them into an organized, repeating patterned, crystalline structure when a solid.
does anyone have the gizmo cell types answer key for activity d?
Answer:
im sorry i dont
Explanation:
An ore is a combination of a metal and another element. TRUE OR FALSE
Answer:
Explanation:
ℎ ℎ
The volume of a gas is 400 mL when the pressure is 1 atm. At the same temperature, what is the pressure at which the volume of the gas is 2 L
Answer:
the pressure is equal to 0.2atm
The pressure at which the volume of the gas is 2 L at the same temperature as when the volume of a gas is 400 mL and pressure 1 atm is 0.2 atm.
What is the combined Gas Law?According to combined gas law,
[tex]\rm \dfrac{PV}{nT} = R[/tex]
In the Combined Gas Law,if we change either one of the variables the others will also change.
When the moles of the gas is constant , the above equation can be written as ,
[tex]\rm \dfrac{P'V'}{T'} = \dfrac{PV}{T}[/tex]
Given is P = 1 atm , V= 400ml , V'= 2L= 2000ml , P'= ? T=T'
So we will substitute the values in the above formula keeping temperature constant.
[tex]\rm P'V' = PV\\\\\rm P' \times 2000 = 1 \times 400\\ \\\m P'= \dfrac{1\times 400}{2000} = 0.2 \; atm\\\\\rm P' = 0.2 \; atm\\[/tex]
Therefore the pressure at which the volume of the gas is 2 L at the same temperature as when the volume of a gas is 400 mL and pressure is 1 atm is 0.2 atm.
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Which element will form an ionic bond with chlorine (Cl): bromine (Br) or magnesium (Mg)
Answer:
The answer is Magnesium
Refer to the following balanced equation in which ammonia
reacts with nitrogen monoxide to produce nitrogen and water.
4NH3(g) + 6NO(g) → 5N2 (9) + 6H20(1)
How many moles of NH3 are necessary to produce 0.824
mol N2 ?
mol NH3
-Your answer should be rounded to three significant figures.
-Do not Include units
in your answer.
Answer:
0.659
Explanation:
n(NH3)/n(N2)=4/5
n(NH3)=4/5×0.824 =0.659