Answer:
373 K; 253 K
0°C ; -258°C
Explanation:
In order to change Temperatures to Absolute Value (Kelvin) you shoud do this sum:
T° in C + 273 = T° in K
For question 1:
100°C + 273 = 373K
-20°C + 273 = 253K
For question 2:
T° K - 273 = T° C
273 K - 273 = 0°C
15 k + 273 = -258 °C
Answer:
-67.8
Explanation:
For the reaction, ?N2 + ?H2 → ? NH3,
What is the maximum amount of NH3 which could be formed from 12.26 mol of N2 and 2.11 mol of H2? Answer in units of mol.
Explanation:
➢number of moles. Moles and Chemical Reactions. Chapter 4. 3 H2. + N2. →. 2 NH3 ... How many grams of NH3 would form if 2.11 moles of N2 reacted with ...
If the mass of all the reactants in a chemical reaction is 100g, what will the mass of all products be?
Can you bond 2 silicon atoms (Si) together to form a complete (real) molecule? Explain your reasoning
Answer: no
Explanation: because silicon cannot share over 3 bonds
A doctor tapes a patients knees with a hammer to test the reflex which can provide information about the condition of the _____
Answer:
lol this is what you get for not answering my question and stealing points
Explanation:
If a reaction is endothermic,
1 point
More energy is released when the bonds in the products are formed than is used to
break the bonds in the reactants
The temperature increases
The same amount of energy is used to break the bonds of the reactants as is released
when the bonds in the products are formed
О O
It takes more energy to break the bonds of the reactants than is released when the
bonds in the products are formed
Answer: It takes more energy to break the bonds of the reactants than is released when the bonds in the products are formed
Explanation:
Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat. Thus it takes more energy to break the bonds of the reactants than is released when the bonds in the products are formed
Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat. Thus More energy is released when the bonds in the products are formed than is used to break the bonds in the reactants
What holds more salt warm or cold water?
what kind of chemical reaction is this?
what is the mass in grams of 1.204x10^24 molecules of hydrogen gas (H2) ?
Answer:
4.03 g
Explanation:
The mass in grams of the hydrogen gas is 4.0 g
StoichiometryFrom the question,
We are to determine the mass in grams of the hydrogen gas.
First, we will determine the number of moles of hydrogen gas present.
Using the formula,
[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]
From the given information,
Number of hydrogen molecules = 1.204 × 10²⁴ molecules
Thus,
Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]
Number of moles of hydrogen gas present = 2 moles
Now, for the mass of the hydrogen gas
Using the formula,
Mass = Number of moles × Molar mass
Molar mass of hydrogen gas = 2.016 g/mol
Then,
Mass of the hydrogen gas = 2 × 2.016
Mass of the hydrogen gas = 4.032 g
Mass of the hydrogen gas ≅ 4.0 g
Hence, the mass in grams of the hydrogen gas is 4.0 g
Learn more on Stoichiometry here: https://brainly.com/question/2861244
How many lone pairs are in SO4 2-
Answer:
None
Explanation:
There are two S=O. bonds and two S-O bonds in sulfate ion lewis structure. Sulfur atom is the center atom and four oxygen atoms are located around sulfur atom. There are no lone pairs in the last shell of sulfur atom.
help plsssssssssssssssssssssss
Answer:
b chemical - thermal and mechanical
Explanation:
energy stored in food in is chemical, so it would only make sense of b) was the answer
Four major bahiagrass varieties
What 3 things will you do to dissolve a solid (salt) faster in a liquid (water)
Answer:
There are three ways to make solids dissolve faster: Break the solute into smaller pieces. Stir the mixture. * Heat the mixture.
Explanation:
Substances can dissolve in water three ways—by dissociation, dispersion, and ionization.
How many particles are in one mole of copper (II) sulfate, CuSO4?
True or False: The reactants and the products of a chemical equation always have the same number of atoms.
Answer: True
Explanation: It always has the same number because the both have or are using the same product.
To investigate the effect of salt water on a cell, a researcher places one cell sample in freshwater and a second cell sample in salt water. After six hours, the researcher observes and sketches the two cells as shown. What change in the cells occurred during the six hours the cells remained undisturbed? A.Osmosis occurred in the salt water cell sample because the water from inside the cell moved out of the cell to a lower concentration, causing the cell to shrink. B.Osmosis occurred in the freshwater cell sample because the water from outside the cell moved into the cell to a higher concentration, causing the cell to grow. C.Osmosis occurred in the salt water cell sample because the salt from outside the cell moved into the cell to a lower concentration, causing the cell to shrink. D.Osmosis occurred in the freshwater cell sample because the salt from inside the cell moved out of the cell to a higher concentration, causing the cell to grow.
Answer:
MARK ME BRAINLIEST
Explanation:
MARK ME BRAINLIEST
According to Banquo, the King "Sent forth great largess to your offices." What
gift does King Duncan bring for Lady Macbeth?
Answer:
Diamond
Explanation:
The answer is gotten from Act 2, Scene 1 of the play by Shakespeare titled "Macbeth". In this scene, we see that Banquo met Macbeth late in the night where they had a profound conversation about the gift of diamond which king Duncan had given to Banquo to deliver to Macbeth.
2
The current temperature, wind, precipitation and
other atmospheric conditions at any given time describes what?
A Controls
B Climate
C Tropics
D Weather
Please someone help me ...............
Answer:
Q58. number of moles(n) and relative formula mass(Mr)
Q59. a) 2 H2S + O2 --> 2 H2O + 2 S
b) After the balanced equation you should able to draw it yourself - I cannot draw it on here :)
Explanation:
Which of the following is an example of acceleration?
A. A boat sits on a boat trailer.
B. A car moves in a straight line at 60 km/hr.
C. A plane moves in air at a steady speed of 850 km/hr.
D. A bus moves on a straight road and then
makes a right turn.
Answer:
it's either B. or C.. hope this helps!
Explanation:
Answer:
D. A bus moves on a straight road and then makes a right turn.
Explanation:
Acceleration is a change in direction or speed. All of the other examples involve straight lines or constant speed.
How much sugar can be dissolved of the 0.3 ml of water is heated to 1000C?
Calculate the percent by mass of benzene in a solution containing 14.2 g of benzene in 28.0 g of
carbon tetrachloride
Answer:
33.65%
Explanation:
total weight of solution=14.2+28=42.2g
benzene=14.2/42.2*100=33.65%
How many grams of hydrogen reacts with 32 g of oxygen to produce 34 g of hydrogen peroxide
Answer:
2 grams.
Explanation:
H2 + O2 ---> H2O2
Using molar masses:
2*1 g hydrogen reacts with 2*16 g oxygen.
so 2g H2 reacts with 32 g O2.
Please help me on this.
Answer: true
Explanation:
i hope this helps
The process of cell division in which the resulting cells have half the chromosomes number of the parent cell.
Question 1 options:
ossmosis
mitosis
meiosis
diffusion
Answer:
Meiosis
Explanation:
This is The process of cell division in which the resulting cells have half the chromosomes number of the parent cell.
When magnesium is added to hydrochloric acid, a gas is formed. Explain what happens in the reaction, how the gas is collected and how it could be tested to prove what it is.
Answer:
Explained below.
Explanation:
Formula when magnesium reacts with hydrochloric acid is given by;
Mg(s) + 2HCl(aq) = MgCl2(aq) + H2(g)
So, from the equation, we can see that the gas formed is hydrogen.
This hydrogen gas is collected by a method known as water displacement.
This gas can be tested for by holding a burning splint near to the top of the test container. The resulting effect should be a high pitched pop sound because the hydrogen gas will react with the oxygen gas in the air to result in a small explosion.
The effective nuclear charge of a neutral atom aluminum, Al with atomic number 13 is
Answer:
wala hindi ko yan alam ty
Which system is responsible for the production of red blood cells?
hormone erythropoietin (EPO) is responsible for the production of red blood cells.
a 2.7 L of N2 is collected at 121kpa and 288 K . if the pressure increases to 202 kpa and the temperature rises to 303 K , what volume will the gas occupy?
Answer:
The gas will occupy a volume of 1.702 liters.
Explanation:
Let suppose that the gas behaves ideally. The equation of state for ideal gas is:
[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)
Where:
[tex]P[/tex] - Pressure, measured in kilopascals.
[tex]V[/tex] - Volume, measured in liters.
[tex]n[/tex] - Molar quantity, measured in moles.
[tex]T[/tex] - Temperature, measured in Kelvin.
[tex]R_{u}[/tex] - Ideal gas constant, measured in kilopascal-liters per mole-Kelvin.
We can simplify the equation by constructing the following relationship:
[tex]\frac{P_{1}\cdot V_{1}}{T_{1}} = \frac{P_{2}\cdot V_{2}}{T_{2}}[/tex] (2)
Where:
[tex]P_{1}[/tex], [tex]P_{2}[/tex] - Initial and final pressure, measured in kilopascals.
[tex]V_{1}[/tex], [tex]V_{2}[/tex] - Initial and final volume, measured in liters.
[tex]T_{1}[/tex], [tex]T_{2}[/tex] - Initial and final temperature, measured in Kelvin.
If we know that [tex]P_{1} = 121\,kPa[/tex], [tex]P_{2} = 202\,kPa[/tex], [tex]V_{1} = 2.7\,L[/tex], [tex]T_{1} = 288\,K[/tex] and [tex]T_{2} = 303\,K[/tex], the final volume of the gas is:
[tex]V_{2} = \left(\frac{T_{2}}{T_{1}} \right)\cdot \left(\frac{P_{1}}{P_{2}} \right)\cdot V_{1}[/tex]
[tex]V_{2} = 1.702\,L[/tex]
The gas will occupy a volume of 1.702 liters.
0.32 moles of oxygen gas has a temperature of 27°C and pressure of 2 atm in a closed container. What is the volume?
Answer:
3.9 L
First convert temperature to Kelvin
then use the ideal gas law
use algebra to solve for V
Since your solving for volume, your answer should be in Liters.
Please help not to fail chemistry
Answer:
I think the heat on the surface or the fire under the dish cost evaporation coz when the water got heat tge water evaporate or go to the upper part of dish and cool down then back to the bottom.
Explanation:
Plss correct me if im wrong