Answer:
moles Hg = 25.8 / 200.59 = 0.129
atoms = 0.129 x 6.02 x 10^23 =7.74 x 10^22
Moles Zn = 0.0340 / 65.39 =0.000520
atoms = 3.13 x 10^20
work in the same way : divide the mass by the molar mass and multiply by 6.02 x 10^23
Explanation:
The number of atoms in 0.0340g of Zinc (Zn) is 3.148 × 10²⁰ atoms.
HOW TO CALCULATE NUMBER OF ATOMS:
The number of atoms contained in a substance can be calculated by multiplying the number of moles of that substance by Avogadro's number (6.02 × 10²³). That is;no. of atoms = no. of moles × 6.02 × 10²³
In this question, we must first convert 0.0340g of Zinc to moles by using the following formula:no. of moles = mass ÷ molar mass
no of moles = 0.0340g ÷ 65g/mol
no of moles = 5.23 × 10-⁴mol
Hence, the number of atoms in Zinc is as follows:no of atoms = 5.23 × 10-⁴ × 6.02 × 10²³
no. of atoms = 5.23 × 6.02 × 10²³-⁴
no of atoms = 31.48 × 10¹⁹
no of atoms = 3.148 × 10²⁰ atoms.
Therefore, the number of atoms in 0.0340g of Zinc (Zn) is 3.148 × 10²⁰ atoms.Learn more: https://brainly.com/question/22552359?referrer=searchResults
the spectral classes of four stars are shown in comparison with a Hertzsprung-Russell diagram. Based on the information which star is most like the sun?
Answer: star 3
Explanation: i did the test
Answer: star 3
Explanation:I did the test
please answer 3 plzzzz
7th grade science
Answer:
Explanation:
Show us the picture, then we can help.
What is a function of the backbone in animals?
A. It protects against predators.
B. It regulates blood glucose.
C. It surround the spinal cord.
D. It limits movement.
Plz help how do I predict the shape of the molecule for GaBr3
Explanation:
GaBr3 is called gallium tribromide. It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.
Answer:
GaBr3 is called gallium tribromide.
Explanation:
It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.
Hope this helps! :)
When KCL dissolved in ethanol, what is the intermolecular attraction between K+ ions and ethanol molecules?
Answer: Ion-Dipole
Explanation: I took the CK-12 practice and got it right
When KCL dissolved in ethanol, the intermolecular attraction between K+ ions and ethanol molecules is ion - dipole interaction.
What is an ion dipole interaction ?The term ion-dipole interaction is defined as the intermolecular force of attraction between cation or anion and a molecule. It is present in the solution where ionic compounds dissolve in polar solvents.
Due to the polar O-H group's presence in the molecule, ethanol is a polar substance. Thus, the molecule has a dipole moment. The dipole's positive end rests on hydrogen, and its negative end rests on oxygen.
K+ ions can interact with the ethanol's negative end of the dipole through ion-dipole interaction when KCl is dissolved in the alcohol.
Thus, When KCL dissolved in ethanol, the intermolecular attraction between K+ ions and ethanol molecules is ion - dipole interaction.
To learn more about an ion dipole interaction, follow the link;
https://brainly.com/question/13950662
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Help with stochiometry asap
H2SO3
What does this stand for?
Answer:
It means Sulfurous Acid
Explanation:
If the temperature is -25 degrees C then water will be in a ___________ phase. However, if the temperature increases to 10 degrees C, it would be in a _________ phase.
A. solid...liquid
B. liquid...gas
C. gas...liquid
D. solid...solid
Answer:
A
Explanation:
Water is solid below 0 degrees C
Water is liquid between 0 and 100 degrees C
Water is gas above 100 degrees C
Which of the following is the smaller atom: magnesium or chlorine?
Answer:
Chlorine atoms are smaller
Explanation:
Magnesium have more electrons than chlorine.
Answer: Chlorine
Explanation: Since chlorine's 17 protons are greater than magnesium's 12 protons, chlorine will have a greater effective nuclear charge to draw chlorine's valence electrons closer to the nucleus and, thus, chlorine is expected to have the smaller atomic radius, while magnesium with the lower effective nuclear charge is expected to have the larger atomic radius.
can you help me with this i don't think it is that hard i just have a lot on my mind.
Answer:
Global wind
Explanation:
The jet streams go around the whole earth from west to east
Hope you have a good day :)
Activity 7 Let's Think First
Directions: Below are possible situations during an earthquake. Encircle the letter of the appropriate action.
1. If you are outside of your house, move away from the buildings.
A. I will do it
B. I will just run anywhere.
2. If you are inside your house, get cover under a table.
A. I will do it
B. I will not do it
3. If you are in a moving car, what will you say to the driver?
A. Just keep driving.
B. Please stop.
4. Drop to the ground and protect your head.
A. I will do it
B. I will not think about it.
5. Prepare a disaster emergency kit beforehand.
A. I will do it
B. I will not do it.
particles are very ..........
Answer:
pls comment if this helps
Explanation:
small this is because people cant see them
Pls help I need help with this ..
Answer:
iTS FLIPPED
Explanation:
Answer:
i don't know sorry so lets be friends
classify the reaction
Answer:
Synthesis reaction
Explanation:
2Hg+O2 ⇒ 2HgO is in the direction of off
Element + Other Element ⇒ Product
The conceptual model of a synthesis reaction is 2Hg+O2 ⇒ 2HgO
If the amount of energy required to break bonds in the reactants is more than the amount of energy released in forming bonds in the products, then the reaction will have a negative change in enthalpy (−ΔH). (2 points)
True
False
CH AT FOR THE WeebsRUs
Answer:
YASSSSSSS
Explanation:
i think the answer is true
Which phrases describe the open-ocean zone? Check all that apply.
very little sunlight
few nutrients
low temperatures
low density
located near coasts
Answer:
- few nutrients
- low temperatures
-very little sunlight
Explanation:
Answer:
I think it's: located near coasts.
___________________is the rate that an object moves in a certain direction. Question 3 options:
Speed
Displacement
Direction
Velocity
Answer: Velocity
Explanation:
i just took the quiz for k12
Velocity is the rate at that an object moves in a certain direction. The correct option is d.
What is velocity?The directional speed of an item in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity. A vector is a velocity. It comprises both magnitude and direction.
The size of velocity is speed. In still air, a particle gravitationally settles and quickly reaches its terminal velocity. The term "settling velocity" refers to a particle's final speed in a still fluid (also known as the "sedimentation velocity").
The particle settling velocity in the foreshore region plays a significant role in understanding fluctuations in the hydraulic regime and interactions between sediment and fluid in the surf zone.
Therefore, the correct option is d, Velocity.
To learn more about Velocity, refer to the link:
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pls help i have 2 hours to do this
what are the resulting elements and compounds of a chemical reaction called?
i need the answer in 2 minutes.
Answer:these starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products
Explanation:I hope this helps
4. When is it appropriate to use Roman numerals in naming compounds?
Answer:
Explanation:
Roman numerals are used in naming ionic compounds when the metal cation forms more than one ion.
Can someone help-
Not number 9)
Answer:
Metamorphosis
Explanation:
Complete metamorphosis occurs through four stages: egg, larva, pupa, and adult. The incomplete metamorphosis occurs
Nitrogen (N) and hydrogen (H) react with each other to produce ammonia (NH3). This reaction is shown in an equation as N2 + 3H2 → 2NH3. What is the ratio of nitrogen atoms to hydrogen atoms in ammonia?
Answer:
the ratio is 1:3
Explanation:
you must find it
The number 6.02 x 1023 is
Avogadro's constant
hope this helped:)
Answer:
6158.46
Explanation:
[tex]602 \div 100 \times 1023[/tex]I WILL GIVE BRAINLIST!!!!!!!!!!!!!!!!!!!!!! PLZZZZZZZZZ HELPPPPPPPPPPPPPP
Explain how proper motion will affect the constellation as seen from the earth.
PLeasee help meee guys iam crying i need corect answer
Hydrogen gas is extremely flammable is it chemical property or physical?
Answer:
chemical
Explanation:
I believe it is a chemical property. Mark brainliest if this helps!
Sand is composed of silicon dioxide SiO2. A 210 gram sample has how many moles?
The number of moles of 210 gram sample of sand contains 3.5 moles of mole of SiO₂
Sand is composed of silicon dioxide (SiO₂).
Therefore, let's calculate the molecular mass of SiO₂ . Therefore,
Molecular mass of SiO₂The molecular mass of the compound is the sum of the atomic mass of the compound.
SiO₂ = 32 + (16 × 2) = 28 + 32 = 60 g/molTherefore,
60 g = 1 mole of SiO₂
210 g = ?
cross multiply
number of moles = 210 / 60
number of moles = 21 / 6
number of moles = 3.5 moles
learn more on moles here:https://brainly.com/question/4816100
An ionic bond forms between what two types of atoms?
80 foot-pounds of work is needed to move the sofa in Tyler's apartment. Which of the following statements is true?
Being able to curl your tongue is a recessive trait (t), while not being able to curl your tongue is a dominant trait (T).
Having curly hair is also a recessive trait (s), while having straight hair is a dominant trait (S).
Parent 1 can curl their tongue (tt) and also has straight hair (Ss). Parent 2 cannot curl their tongue (TT) and has
curly hair (ss). In your notebook, perform a dihybrid cross for these traits. Parent 1: ttSs Parent 2: TTSS
13
What are the Parent 1 gametes? (HINT: FOIL. There will be 4 genotypes)
14
What percent of offspring can curl tongue and have straight hair?
15
What percent of offspring cannot curl tongue and have curly hair?
The atomic size of zirconium is smaller than
a. niobium
b. Yttrium
c. Molybdenum
d. None of the above
Answer:
b
Explanation:
because hahamaskdjdjskskskskkssksksks