Answer:
hail Hydra kandksmak Yes
Which pair of elements will form an ionic bond?
Answer: A pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions
Explanation:
Explain the difference between endothermic and exothermic processes. Provide an example of each.
These are reactions that transfer energy to the surroundings (ie the energy exits from the reaction, hence the name exothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. A thermometer is used to detect the temperature increase.
Examples:
Combustion
Neutralisation between acids and alkali
Endothermic reactionsThese are reactions that take in energy from the surroundings (ie energy enters the reaction, which will help you to remember the name endothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become colder. A thermometer is used to detect the temperature decrease.
Example:
Electrolysis
True or False:
Houston, Texas received approximately 2 inches of snow on February 15, 2021. Based on this, we can now say Houston's climate consists of long, freezing winters and yearly snowfall. Please answer ASAP. Thanks
Answer:
False.
Explanation:
I majored in Chemistry
Can any wan help pls pls
Answer:
1) food molecules enter receptors .....
2) The sensory receptors sends the message....
3) The message reaches the brain
4) the brain procces the information it recieved...
5) The brain stores the info ...
6) The brain retrieves the info . ....
(I hope its clear ! I hope its right too ;) )
How many moles are contained in 7.88 x 10^24 atoms of Iron
Answer:
1.31 × 10^47
Explanation:
1 mol of Fe =
[tex]1 \: mol \: of \ fe = 6.02 \times 10 ^{23} \ \\ x \: mol \: offe \: = 7.88 \times {10}^{24} \\ \\ \\ so \: 7.88 \times {10}^{24} \div 6.02 \times {10}^{23} \\ \\ x = 1.31 \times {10}^{47} [/tex]
Help plzzzzz it's due today ----- Would Shining light on the reaction increase or decrease the reaction rate
Answer:
increase
Explanation:
Reactions that are initiated by light are called photochemical reactions. The brighter the light, the faster the reaction.
Answer: An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure. 17.5 “Temperature and Reaction Rate”).
Explanation:
how do I find the slope of this graph? Is it even possible?
Answer:
Not exactly But you can take the slope of the curved portion and the slope of the flatline.
It wont do you much good since your working for absorbance but if you ever see something like a temperature change you can use the slope(s) to find freezing points/melting
Explanation:
If you need to submit a slope you could use a best fit which is just point to point or you could break it up like i mentioned
How many protons does isotope of carbon- 14 atom have
Answer:
Number of protons in Carbon - 14 atom [tex]6[/tex]
Explanation:
The atomic number of carbon 14 atom is [tex]14[/tex]
Number of neutrons in the nucleus of Carbon-14 atom [tex]= 8[/tex]
Atomic number is equal to the sum of neutrons and protons
Number of protons in Carbon - 14 atom [tex]= 14 -8 = 6[/tex]
why a “control” is important in a case-control study of a disease?
Answer:
Explanation:
Purpose of Case Control Studies
To determine whether or not an association exists between a disease and a particular risk factor. To start with a group of people with disease and work back to see whether a possible risk factor may be the cause. It may be the first step in testing a hypothesis.
Predict the chemical formula for the ionic compound formed by NH4+ and POsub4exponent3-
1) How many moles of water does 6.02 x 1023 molecules
represent?
Answer:
1.00 mol
Explanation:
Step 1: Given data
Molecules of water: 6.02 × 10²³ molecules
Step 2: Calculate the number of moles corresponding to 6.02 × 10²³ molecules of water
In order to convert molecules to moles, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
6.02 × 10²³ molecules × 1 mol/6.02 × 10²³ molecules = 1.00 mol (we keep 3 significant figures)
1.I make my cup of coffee in the morning by pouring boiling water over ground-up coffee beans held in a special piece of paper and by collecting the brown liquid that comes through. Which techniques of the five described in the background section is/are used in the preparation of the cup of coffee
Answer:
Filtration
Explanation:
Filtration is a physical separation technique that is used to separate solids from liquids or gases. The process involves the use of a filter which allows just the liquid to pass through.
In this case, the coffee beans is the solid and the boiling water is the liquid. The special piece of paper is the medium (filter) through which the coffee is collected.
The coffee coming through the special piece of paper (filter) is called a filtrate.
Filtration is used in the preparation of the cup of coffee.
Jewelry and tableware are sometimes made of sterling silver. Sterling silver is 92.5% silver (Ag) and 7.5% copper (Cu). If you wanted to make 30 grams of sterling silver for a ring, how many grams of silver and copper would you need to start with?
Amount of sterling silver?
Amount of copper?
total grams of alloys needed?
Answer:
12.33
Explanation:
92.5/7.5= 12.33
30g of the sterling silver ring contains, 27.75 g of silver and 2.25 g of copper.
What is cross multiplication?Cross multiply fractions by multiplying one fraction's denominator by the other fraction's numerator and then comparing the two values. The larger fraction is the one with the higher value.
100g of sterling silver contains 92.5g of silver and 7.5g of copper.percentage of element = amount of the element present in 100 g of materialTherefore,
100g sterling silver = 92.5g silver30g sterling silver = X g silver( cross multiplication),
100 × X = 92.5 × 30
X = 92.5 × 30/ 100
X= 27.75g silver100g sterling silver = 7.5g copper
30g sterling silver= Y g copper
(cross multiply)
100 × Y = 7.5 × 30
Y= 7.5 × 30 / 100
Y= 2.25g copperX (silver)= 27.75 g in 30 g of sterling silverY (copper)= 2.25 g in 30 g of sterling silvertherefore, 30g of sterling silver ring contains, 27.75 g of silver and 2.25 g of copper.
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Why is the average air temperature of Makassar warmer than the average air
temperature of Chirstchurch?
Answer:
becuase of the sun
in different places some places would be cold
Which name for an ionic compound is
incorrect?
Chromium(IID fluoride (for CrF3 )
Copper(ID) oxide (for Cuo)
Potassium(I bromide (for KBr)
Answer:
no se ingles todavía no aprendo a hablar inglés ya si estuvieran en español los respondia
13. What is the meaning of the word faint?
How many atoms is 45 moles of silicon (Si)?
In a graph, what effect would adding a catalyst have on D?
A. It would decrease.
B. It would increase.
C. It would stay the same.
D. You cannot tell from this graph.
Answer:
C. It would stay the same
Explanation:
PLATO answer
Chemical reactions happen when _____. a.atoms attract or repel one another b.heat is created by friction c. two or more substances are mixed substances are heated or d.cooled
Answer:
A
Explanation:
A balloon with a volume of 0.5L at 293K is cooled to 20K. What is the balloon's new
volume?
Answer:
0.03 L
Explanation:
Step 1: Given data
Initial volume of the balloon (V₁): 0.5 LInitial temperature of the balloon (T₁): 293 KFinal volume of the balloon (V₂): ?Final temperature of the balloon (T₂): 20 KStep 2: Calculate the final volume of the balloon
The balloon is filled with air. If we assume it behaves as an ideal gas, we can calculate the final volume of the balloon using Charles' law.
V₁/T₁ = V₂/T₂
V₂ = V₁ × T₂/T₁
V₂ = 0.5 L × 20 K/293 K = 0.03 L
Hypothesis: What do you think will happen when you add more magnets to the set up?
Answer:
........................
g 8. A hydrogen atom is initially a rest and in the ground state. A proton with kinetic energy 1000 eV scatters off the atom. In the process the hydrogen atom is ionized. The kinetic energy of the ionized electron is measured to be 15.2 eV and the kinetic energy of the proton produced from the ionization of hydrogen is 4.3 eV. What would be the final kinetic energy of the projectile proton after the collision
Answer:
Explanation:
Ionization energy of hydrogen atom is 13.6 eV . This energy will be provided by energetic proton , the kinetic energy of which is 1000 eV. The kinetic energy of ionized electron is 15.2 eV . Kinetic energy of proton produced from from the ionization of hydrogen or the nucleus of the hydrogen atom is 4.3 eV . All these energy must have come from kinetic energy of initial proton.
So kinetic energy of projectile proton after collision
= 1000 - ( 13.6 + 15.2 + 4.3 ) eV.
= 966.9 eV .
Argon makes up about 0.93% of our atmosphere. If the atmospheric pressure is 760 mm Hg, what is the pressure contributed by argon?
Answer:
[tex]P_{Ar}=7.068mmHg[/tex]
Explanation:
Hello!
In this case, according to the given percent of argon in our atmosphere, it is possible to compute the pressure contributed by it as shown below:
[tex]P_{Ar}=P_{atm}*0.93\%[/tex]
Thus, we plug in to obtain:
[tex]P_{Ar}=760mmHg*0.0093\\\\P_{Ar}=7.068mmHg[/tex]
Best regards!
The pressure of the argon gas will be equal to [tex]P_{Ar}=7.068 \rm\ mmHg[/tex]
What will be the pressure of the argon gas?Pressure is defined as the normal force acting on any surface in the case of gases it is the normal force acting on the surface of the earth.
now it is given in the question that the Argon contains 0.93% part in the atmosphere.
So here are the calculations
[tex]\rm P_{Ar}=P_{Atm}\times 0.93[/tex]%
[tex]\rm P_{Ar}=700\times 0.93[/tex]%
[tex]\rm P_{Ar}=7.068\ mmHg[/tex]
Thus the pressure of the argon gas will be equal to [tex]P_{Ar}=7.068 \rm\ mmHg[/tex]
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How many moles are in 74.8 grams of NaCl?
Answer:
1.28 mol NaCl
Explanation:
Find the mass of NaCl by adding the two elements atomic mass
Na: 22.99
Cl: 35.45
22.99+35.45=58.44 g
Now convert to moles
74.8 g / 58.44 g = 1.27994524298 mol
How many atoms is 45 moles of silicon (Si)?
i have understood that the meaning of life is
I have understood that the meaning of life is to have a vision and live a purposeful life.
Living a meaningful life is concerned about the essence of waking up everyday and having something meaningful that you're doing or engaging yourself into what you have vision about.
Life is good and lively when you have a vision, this vision is drive by a passion for a particular thing. When you're visionary, you will be happy every day and it is visionaries that change the world positively.
Over an extended period of time, this vision will be brought into life where people can benefit from it. Here, is where purpose comes in.
When you're able to impact positively into another people's life and make their life easier, you're living a purposeful life.
Learn more about vision and purpose here:
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How many moles are in 5.34 x 10*21 particles of Nitrogen?
Calculate ΔGo if the equilibrium constant is 1.37 x 10-5
Explanation:
your answer willing be 8.7
Which is larger in A and B
Answer:
Here is the answer ⬆️⬆️⬆️⬆️⬆️
Elements are solid liquid and gas substance that can be found on earth which statements best describes an element
Answer:
i guess
Explanation:
we will never know