Answer:
Number of atoms in 5.9 g of N2 = 1.268 *10^23
Explanation:
Weight of one mole of N2 is 28.0134 g
In one mole of N2, number of atoms = 6.023 *10^23
Number of atoms in 28.0134 g (one mole) of N2 = 6.023 *10^23
Number of atoms in 1 g of N2 = 6.023 *10^23/28.0134
Number of atoms in 5.9 g of N2 = 6.023 *10^23/28.0134 * 5.9
= 1.268 *10^23
describe how to calculate the relative atomic mass
Which of the following are HETEROGENEOUS mixtures from this list (check all that apply).
A. Air
B. Sweet Tea
C. Trail mix
D. Soil
E. Beach sand
F. Water
A cylinder of hot gas with pressure of 2.81 atm is at 371°C. It is then
cooled to 85°C. What is the gas pressure at the lower temperature?
Help
Answer: 3.38 Atm is the partial ressure of each gas
A 1.85 kg textbook is sitting on a bookshelf 2.23 m above the floor. How much potential energy does it have?
Answer:
[tex]\boxed {\boxed {\sf 40.4299 \ Joules}}[/tex]
Explanation:
Potential energy is energy due to position. It is the product of mass, height, and acceleration due to gravity.
[tex]PE= m \times g \times h[/tex]
The mass of the textbook is 1.85 kilograms. Assuming this is on Earth, the acceleration due to gravity is 9.8 meters per square second. The height is 2.23 meters.
m= 1.85 kg g= 9.8 m/s²h= 2.23 mSubstitute the values into the formula.
[tex]PE = 1.85 \ kg \times 9.8 \ m/s^2 \times 2.23 \ m[/tex]
Multiply the first 2 numbers together.
[tex]PE=18.13 \ kg*m/s^2 *2.23 \ m[/tex]
Multiply again.
[tex]PE= 40.4299 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second (1 kg*m²/s²) is equal to 1 Joules (J) Our answer of 40.4299 kg*m²/s² is equal to 40.4299 J[tex]PE= 40.4299 \ J[/tex]
The textbook has 40.4299 Joules of potential energy.
how deadly and destructive is the crystal movement of a volcano?
Answer:
Explosive eruptions occur when magma, which is molten rock in the ground, contains gas. ... The most dangerous features of these events are volcanic ash flows swift, ground-hugging avalanches of searing hot gas, ash and rock that destroy everything in their path.
Explanation:
A sexually mature seahorse can produce thousands of offspring. What is the BEST reason overproduction of offspring by marine organisms is considered to be a reproductive advantage?
A:It increases competition.
B: It decreases competition.
C: It contributes to the organism’s biological success.
D: It causes stress on the environment which will apply stress to the creature to adapt.
Many people try to eliminate fat from their diets. Which is one reason it is
necessary for humans to eat fat?
Answer:
C
Explanation:
While it is common to notice that many people avoid food that contain fat due to the fact that they are avoiding the adverse implications of fat consumption, the consumption of fat also has some advantages.
Prominent among the advantages of fat in the body is that fat cushions the internal organs. This cushioning of the internal organs avoids sudden damage to these organs.
For this reason, it is necessary for humans to eat fat.
Both Arrhenius and Bronsted-Lowry defintions of an acid are similar. According to both of these definitions, an acid is a compound that -
donates a pair of electrons
contains a nonmetal anion
donates a hydrogen ion
should be labeled as corrosive
Answer:Donates a hydrogen ion
Explanation:
How many grams would be in 1.752 x10^26 formula units of Ca(No3)2
Answer:
47730 grams.
Explanation:
First we convert 1.752x10²⁶ formula units of Ca(NO₃)₂ into moles, using Avogadro's number:
1.752x10²⁶ formula units ÷ 6.023x10²³ formula units/mol = 290.88 molThen we convert 290.88 moles of Ca(NO₃)₂ into grams, using the molar mass of Ca(NO₃)₂:
290.88 mol * 164.088 g/mol = 47730 gConsider an ideal gas contained in a cylinder with the volume 34.4L, temperature 667K and pressure 2atm.What will be pressure of the gas if it is heated at 1000k and the volume becomes 50L.
Given :
An ideal gas contained in a cylinder with the volume 34.4L, temperature 667K and pressure 2 atm.
To Find :
What will be pressure of the gas if it is heated at 1000k and the volume becomes 50L.
Solution :
We know, by ideal gas equation :
[tex]Pv = nRT[/tex]
Now, in the given question only their are two state and also their is no leakage so amount of gas is also constant.
So,
[tex]\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}\\\\\dfrac{2\times 34.4}{667} = \dfrac{P_2 \times 50}{1000}\\\\P_2 = \dfrac{2\times 34.4 \times 1000}{667 \times 50}\ atm\\\\P_2 = 2.06 \ atm[/tex]
Therefore, the pressure of gas is 2.06 atm.
If a system is left to change spontaneously, in what state will it end?
A. The state with the lowest possible energy consistent with the state of maximum disorder
B. the state with lowest possible energy
C. The same state in which it began
D. The state with the maximum disorder
Answer:
The state with the lowest possible energy consistent with the state of maximum disorder
so letter A
If a system is left to change spontaneously then, the state with the lowest possible energy is consistent with the state of maximum disorder. option A is correct.
what is spontaneous change?A spontaneous change may be so fast or rapid or in a fraction of time that it is essentially instantaneous or fast or so slow that it cannot be observed over any practical time of period.
A is the spontaneous change is one in which the system happening into which the A an increase or boost in internal energy B lowering decline in entropy C lowering in energy D no energy change Medium.
The time-evolution or change of a system in which it releases free energy and it moves to a lower, or decreased more thermodynamically stable energy state, closer to attend the thermodynamic equilibrium.
Therefore, the system is left to change spontaneously then, and the state with the lowest possible energy is consistent with the state of maximum disorder. option A is correct.
Learn more about spontaneous change, here :
https://brainly.com/question/14437673
#SPJ2
4. How would you calculate the poH of a base when given the
concentration of [OH]-?
Answer:
Use pOH = -log₁₀ [OH-]
Explanation:
pOH can be calculated from the concentration of hydroxide ions using the formular below:
pOH = -log₁₀ [OH-]
The pOH is the negative logarithm of the hydroxide ion concentration.
HELP ASAP!
Which statement describes one way that nuclear fission differs from nuclear
fusion?
Answer:
answer is A- nuclear fission is too hard to control for use in practical applications
Answer:
O C. Nuclear fission is used to produce electrical power.
Explanation:
what uses a coil that is a temporary electromagnet
Answer: transformers, generators ,inductors, electric motors
Explanation:
What is the pH of a solution that contains 0.009 grams of oxalic acid in 100
mL of water?
Answer:
pH = 3.0 ya that's it......
¿Qué estudia la química orgánica?
Answer: el estudio de la síntesis, estructura, reactividad y propiedades del diverso grupo de compuestos químicos construidos principalmente de carbono
Explanation:Hope I helped:)
Which type of changes are melting, freezing, and boiling?
Answer:
the changes are physical changes
What structure behind the eardrum touch that membrane?
Answer:
The middle ear is the portion of the ear internal to the eardrum, and external to the oval window of the inner ear. The mammalian middle ear contains three ossicles, which transfer the vibrations of the eardrum into waves in the fluid and membranes of the inner ear.
Explanation:
An endothermic dissolution process a. absorbs energy as heat and has positive enthalpy of solution. b. releases energy as heat and has positive enthalpy of solution. c. absorbs energy as heat and has negative enthalpy of solution. d. releases energy as heat and has negative enthalpy of solution.An endothermic dissolution process a. absorbs energy as heat and has positive enthalpy of solution. b. releases energy as heat and has positive enthalpy of solution. c. absorbs energy as heat and has negative enthalpy of solution. d. releases energy as heat and has negative enthalpy of solution.
Answer:
a. absorbs energy as heat and has positive enthalpy of solution.
Explanation:
A reaction can either be exothermic or endothermic. An endothermic reaction, as the dissolution described in the question, is that which absorbs heat energy from the surroundings in order to start the reaction.
Because an endothermic reaction makes heat lost from the surroundings, the enthalpy (∆H) of the solution will be positive (+). ∆H is got by finding the difference between the enthalpy of the reactants and products and since the enthalpy of a product in endothermic reaction is more, the enthalpy change (∆T) will be positive.
(Quick pls!! Just the answer, no links) Which scenario is an example of a scientific way of thinking?
A. A researcher reviews images of lunar eclipses taken by
professional photographers and then ranks them in order of which
are the most beautiful
B. A researcher writes to a government representative to convince
the representative to encourage public participation in eclipse
watching
C. A researcher analyzes data on the motions of the Moon and Earth
and then makes a prediction about when the next lunar eclipse will
ocour
D. A researcher reade several different articles on the beat way to
enjoy a lunar eclipse and then decides which method is beat
Explanation:
The right answer is C
Hope i could be helpful
Determine the empirical formula of a compound containing 0.57% hydrogen, 72,1% Todine, and 27.3\% oxygen.
Which is the balanced equation for a reaction between hydrogen gas and oxygen gas
Answer:
it is known that two molecules of hydrogen gas, H2, react with one molecule of oxygen gas, O2, to form two molecules of water, H2O. This reaction may be represented by the chemical equation 2H2+O2→2H2O. The formula weight of hydrogen gas is 2.01594, that of oxygen gas 31.9998, and that of water 18.01534
Answer:
it is known that two molecules of hydrogen gas, H2, react with one molecule of oxygen gas, O2, to form two molecules of water, H2O. This reaction may be represented by the chemical equation 2H2+O2→2H2O. The formula weight of hydrogen gas is 2.01594, that of oxygen gas 31.9998, and that of water 18.01534
Explanation:
the user above
give me the type of reactions ___ CuCO3 → ___ CuO + ___ CO2
0.630 moles of sodium chloride are how many grams (with calculation)
Answer:
Heyaa!! Im Pinky and Im here to inform you that your answer is...
Explanation:
!!! 36.8189451 Grams !!!
Have an amazing day!!!
~Pinky~!!
When particles lose heat, what else is true?
Answer:
Answer: When the particles lose heat they move slower and have decreased kinetic energy.
Calculate the density of the baseball. Use the formula
D= m/V
where D is the density, m is the mass, and V is the
volume.
Determine whether the density of baseball is within the
legitimate range for an official baseball.
Record your answers in Table C of your Student Guide.
What is the density of the baseball?
g/cm3
The acceptable density range of official baseballs is
between 0.70 g/cm3 and 0.80 g/cm3. Is the
questionable ball in this range of acceptable density?
Answer:
0.73 and yes
Explanation:
The answers are 0.73 and yes! <3 ^-^
I need help for chemistry, I barely know English...
Answer:
6c12
Explanation:
Which part of an organism is LEAST likely to form a fossil?
A. skin
B. tooth
C. bone
D. shell
Answer:
[tex]\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}[/tex]
A. Skin
Explanation:
Skin unlike teeth, bones & shells is fragile & get decomposed easily under the soil.
Answer:
um a I think because when you look at dinosaur you don't see their skin anymore just like the bones and teeth
What is represented by the dashed blue line and the solid black line in the image below? motion,vectors,scalars,distance,displacement
Answer:
Distance
Explanation:
There as you see the lines are in a following of a path, like marathon. IT also states above each structure. Start and finish, why would it show motion. It shows distance.
What happens during a lunar eclipse?
A
Earth passes between the sun and the moon.
B
The moon passes between the sun and Earth.
C
The sun passes between Earth and the moon.
D
Earth, the sun, and the moon are at right angles in space.
Answer:
A.EARTH PASSES BETWEEN THE SUN AND THE MOONExplanation:
When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse.
pabrainliest po plss:)