Answer:
1s2 2s2 2p3
Explanation:
Which transportation system is best used to transport people and goods to remote inland areas?(1 point)
road transport
hope it helps...!!!
Answer:
1. road
2. It evenly
3. system, subsystem, componet
4. control
5. combustion.
Hope this is helpful
Consider the substances below. • 1 mol of beryllium • 1 mol of salt • 1 mol of water • 1 mol of hydrogen which statement is true about these substances? they have exactly the same mass. they have different numbers of particles. they have the same number of atoms. they have different masses.
True statement for 1 mole of salt, water and hydrogen is that they have the same number of atoms and different masses.
What is Avogadro's Number?Avogadro's Number is that number which tells about the number of entities present in one mole of any substance and it is equal to 6.022×10²³.
Means in one mole of any substance 6.022×10²³ number of atoms of that substance will present.
Relation between moles and mass will be represented as:
n = W/M, where
W = given mass
M = molar mass
So for any given moles, mass of substance will be different as molar mass of all substances are different.
According to given two concepts in 1 mole of salt, water and hydrogen same number of atoms are present but they all will have different masses.
Hence, they have the same number of atoms and different masses.
To know more about Avogadro's number, visit the below link:
https://brainly.com/question/1513182
Answer:
D. They have different masses
Explanation:
Which of these properties of an iron nail is a physical property?
a) does not burn when a flame is applied
b) reacts with hydrochloric acid to release hydrogen gas
c) solid at room temperature
d)rusts
The answer choice which represents a physical property of Iron is; Choice C; solid at room temperature.
Physical Properties of IronPhysical properties of elements are properties observed and measured without changing the makeup, or composition, of a substance. They include characteristics such as color, density, and temperature of phase changes such as melting point or boiling point.
On this note, the fact that iron is solid at room temperature is a physical property.
Read more on Physical Properties of Elements:
https://brainly.com/question/18486908
Questions
1. The introduction to this chapter says that “we live immersed in
a gaseous solution.” What does that mean?
2. How are the three states of matter similar, and how do they
differ?
3. Figure 13.1 shows an experiment that can be used effectively
to demonstrate the pressure exerted by the atmosphere. Write
an explanation of this experiment to a friend who has not yet
taken any science courses to help him understand the concept
of atmospheric pressure.
We live immersed in a gaseous solution means that we are living in an environment where different types of gases are present.
What this phrase means?When we talk about living in this gaseous solution, we means atmosphere. We know that atmosphere is the mixture of different gases.
So we can conclude that we live immersed in a gaseous solution means that we are living in an environment where different types of gases are present.
Learn more about gas here: https://brainly.com/question/25736513
how many moles are in 500.0cm^3 of oxygen gas at stp
Answer:
.02232 mole
Explanation:
At STP each 22.4 liters is a mole
.5 liters / 22.4 l/mole = .02232 mole
How many different principal quantum numbers can be found in the ground-state electron configuration of nickel
4
-----________-------_________------
How many liters of 2M HCl is needed to make 1 L of 0.05M HCI?
Answer:
0.025L of 2M HCl
Explanation:
This is a dilution problem involving the equation
[tex]M_1V_1 = M_2V_2[/tex]
Where M is molarity in grams/liter and V is volume in liters, and 1 and 2 represent initial and final states, respectively.
We know that:
[tex]M_1[/tex] = 2, as 2M HCl is the starting substance
[tex]M_2[/tex] = 0.05, as 0.05M HCl is the desired final substance
[tex]V_2[/tex] = 1, as 1 L is the desired volume of the final substance
Now you can solve for [tex]V_1[/tex].
[tex]2V_1 = 0.05(1)\\V_1 = \frac{0.05}{2} \\V_1 = 0.025[/tex]
Therefore, 0.025L of 2M HCl is needed to make 1 L of 0.05M HCl
what is the difference between high and low pressure?
A. there are the same number of particle collisions happening in high and low pressure
B. in low pressure, there are more particle collisions happening then high pressure
C. in high pressure, there are more particle collisions then low pressure
D. pressure is not caused by the collisions of particles
How are proton , neutron and electron arranged in an atom
Someone can you help me Please urgent
Answer: I believe in you.
Explanation:
studdy. You got this buddy!
How much coal will be produced in the year 2050 for each region?
Answer:
EIA projects less than a quarter of the world's electricity generated from coal by 2050. net electricity generation by fuel.
Explanation:
what is the molarity of 2.0 L of a solution made from 2.4 moles of NaCl and water?
Answer: 1.2 M
Explanation:
molarity = (moles of solute)/(liters of solution) = 2.4 / 2.0 = 1.2 M
The reaction below consistently yields 82% of the theoretical value. If you need to make 10 g of Mg(OH)2 How much Mg3N2 (g) should you use (assume that you will use H2O in excess).
Mg3N2(s) + H2O(l) → Mg(OH)2(s) + NH3(g)
Help me please!
If excess [tex]H_2O[/tex] is used as stated in the illustration the amount of [tex]Mg_3N_2[/tex] that would be required would be 7.57 grams
Stoichiometric calculationFrom the equation of the reaction:
[tex]Mg_3N_2(s) + 6H_2O(l) --- > 3Mg(OH)_2(s) + 2NH_3(g)[/tex]
Since the yield is 80% of the theoretical value, in order to make 10g, the theoretical yield would be 12.5 g.
Mole ratio of [tex]Mg_3N_2[/tex] and [tex]Mg(OH)_2[/tex] = 3:1
Mole of 12.5 g [tex]Mg(OH)_2[/tex] = 12.5/53.32 = 0.225moles
Equivalent mole of [tex]Mg_3N_2[/tex] = 0.124/3 = 0.075 moles
Mass of 0.0041 moles [tex]Mg_3N_2[/tex] = 0.075 x 100.95 = 7.57 grams
More on stoichiometric calculations can be found here: https://brainly.com/question/8062886
Baking soda, or sodium bicarbonate, is used as a leavening or raising agent in some types of bread. The sodium bicarbonate reacts with acids, producing bubbles of carbon dioxide that cause the bread dough to rise. List two ways you could increase the reaction rate to make the dough rise faster.
The rate of reaction refers to how fast or slow a reaction is. The rate of reaction can be increased by;
i) Using finely divided sodium carbonate
ii) Increasing the temperature
Rate of reactionThee term rate of reaction refers to the pace of a chemical reaction. A reaction could be fast or slow.
To increase the rate of this reaction;
i) The sodium bicarbonate could be used in the finely divided form.
ii) The temperature could be raised.
Learn more about rate of reaction: https://brainly.com/question/13440548
PLEASE HELP!!!!! (SCIENCE!!!)
large iguanas are affected by el nino temperatures
because algae do not grow as rapidly with el nino temperatures
survival rates for the larger iguanas drop
if they are bigger than 36 centimeters
the drop happens beginning with sizes around 40 centimeters
Please answer the question in the image correctly
Answer:
the wing shape and color
how is energy obtained from different sources stored, transported, and used?
Answer:
Mode of transportation and source of energy
Energy sources are used in several major ways
Gasoline is used in cars, motorcycles, light trucks, and boats. Aviation gasoline is used in many types of airplanes. Distillate fuels are used mainly by trucks, buses, and trains and in boats and ships. Jet fuel is used in jet airplanes and some types of helicopters.
Explanation:
If 5 mol of oxygen gas effuses through an opening in 10 seconds, how long will it take for the same amount of hydrogen gas to effuse under the same conditions?
( a ) 1.6 s
( b ) 2.5 s
( c ) 40 s
( d ) 160 s
Answer:
B
Explanation:
Recall the law of effusion:
[tex]\displaystyle \frac{r_1}{r_2} = \sqrt{ \frac{\mathcal{M}_2}{\mathcal{M}_1} }[/tex]
Because 5 mol of oxygen was effused in 10 seconds, the rate is 0.5 mol/s.
Let the rate of oxygen be r₁ and the rate of hydrogen be r₂.
The molecular weight of oxygen gas is 32.00 g/mol and the molecular weight of hydrogen gas is 2.02 g/mol.
Substitute and solve for r₂:
[tex]\displaystyle \begin{aligned} \frac{(0.5\text{ mol/s})}{r_2} & = \sqrt{\frac{(2.02\text{ g/mol})}{(32.00\text{ g/mol})}} \\ \\ r_2 & = \frac{0.5\text{ mol/s}}{\sqrt{\dfrac{(2.02\text{ g/mol})}{(32.00\text{ g/mol})}}} \\ \\ & = 2.0\text{ mol/s}\end{aligned}[/tex]
Because there are 5 moles of hydrogen gas:
[tex]\displaystyle 5.0\text{ mol} \cdot \frac{1\text{ s}}{2.0\text{ mol}} = 2.5\text{ s}[/tex]
In conclusion, it will take about 2.5 seconds for the hydrogen gas to effuse.
Check: Because hydrogen gas is lighter than oxygen gas, we expect that hydrogen gas will effuse quicker than oxygen gas.
The volume of a sample of hydrogen gas at 0. 997 atm is 5. 00 L. What will be the new volume if the pressure is decreased to 0. 977 atm? Temperature is constant
Answer: 5.10 L
Explanation:
how many moles of water are needed to react with 2.3 grams of sodium
Answer:
Brainliest pls
Explanation:
Theoretical yield = 0.1 g
Percent yield = 80%
An air sample in an elastic bag has a volume of 3. 8 L when the temperature is 10 C. What will be the volume in liters when it is heated to 150 C?
At 10°C :
Volume = 3.8 LTemperature (in Kelvin) :
[tex]\qquad \tt \dashrightarrow \: 10 + 273[/tex]
[tex]\qquad \tt \dashrightarrow \: 283 \: k[/tex]
Now,
Temperature in Kelvin (at 150° C)
[tex]\qquad \tt \dashrightarrow \:150 + 173[/tex]
[tex]\qquad \tt \dashrightarrow \:323 \: k[/tex]
Now, let's find the volume (x) [ assume pressure to be constant ]
[tex]\qquad \tt \dashrightarrow \: \dfrac{V_1}{T_1} = \dfrac{V_2}{T_2}[/tex]
[tex]\qquad \tt \dashrightarrow \: \dfrac{3.8}{283} = \dfrac{x}{323}[/tex]
[tex]\qquad \tt \dashrightarrow \: \dfrac{3.8}{283} \times 323 = {x}[/tex]
[tex]\qquad \tt \dashrightarrow \: {x} \approx4.34 \: \: litres[/tex]
How does volume affect temperature and pressure?
Answer:
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure
Explanation:
When chemical reactions occur the _____ but the _____.
Answer: Heyo Kenji Here! Here's your answer- when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
Explanation: ~Hope this helps!~
Have a nice day!
- Kenji ^^
Why does brownian motion occur
Answer:
Explanation:
Particles in both liquids and gases (collectively called fluids) move randomly. This is called Brownian motion. They do this because they are bombarded by the other moving particles in the fluid. Larger particles can be moved by light, fast-moving molecules.
Difference between simple and fractional distillation.
Answer:
Simple distillation is the method used to separate substances in mixtures with significantly different boiling points, while fractional distillation is used for mixtures containing chemicals with boiling points close to each other.
For the reaction H2O(g) + Cl2O(g) → 2HCIO(9), you know S rxn and Sosys and S° of HCIO(g) and of H2O(g). Write an expression that can be used to determine Cl2O(g)
The expression that can be used to determine Cl2O(g) is ;
[tex]S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}[/tex]
Determine an expression that can be used to determine Cl2O(g)The general expression for ΔS°rxn of a chemical reaction
ΔS°rxn = ∑mS°products - ∑nS°reactants
where ; m and n = stoichiometry coefficients
Considering the given reaction : H₂O(g) + Cl₂O(g) → 2HCIO (g)
[tex]\beta[/tex]S°rxn = [tex]2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) } ^{o} - S_{Cl_{2}O } ^{o}[/tex] ------- ( 2 )
Rearranging the equation above
[tex]S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}[/tex]
Hence we can conclude that The expression that can be used to determine Cl2O(g) is ;
[tex]S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}[/tex]
Learn more about stoichiometry : https://brainly.com/question/16060223
why is the speed of these particles deffirent in each state
Answer:
due to difference ic kinetic energy
Explanation:
Determine the mass of an object that has a volume of 88.6 mL and a density of 7.77 g/mL. 0.0877 g 80.8 g 96.37 g 688 g 11.4 g 10 points
Answer:
688g
Explanation:
This is the correct awnser
NEED HELP ASAP!! THANKS! (will mark brainliest)
Newspaper has a Specific Heat Capacity of 1.336 J/goC. How many Joules does a 115g sample of newspaper absorb when it changes temperature from 25oC to 31oC?
Answer:
Is this what you're looking for?
Explanation:
Fossil fuels are an important natural resource used by society. which of the following best describes fossil fuels? a. they are any liquid fuel derived from once-living matter. b. they are organic fuels derived from ancient plants and animals. c. they are fuels in which dinosaur fossils are commonly found. d. they are naturally occurring inorganic fuels like coal and petroleum.
Fossil fuels are an important natural resource used by society and they are organic fuels derived from ancient plants and animals.
What are fossil fuels?Fossil fuels are the natural resources means they are derived from the ancient resdue of plants and animale due to theor decomposition under high temperature and pressure.
Fossil fuel may be present in solid, liquid as well as in gaseous form so the given option (a) is incorrect.This is the wrong assumption that in the fossil fuel we get the fossils of dinosaur, so option (c) is incorrect.They are not inorganic fuels infact they are organic fuels.So, fossil fuels are organic fuels derived from ancient plants and animals.
Answer:
B cuh
Explanation:
trust me cus im just smart like dat