Chemistry High School

Part B: Short Answer - Answer the following questions
6. Why are the elements so important?
7. The transition metal Cobalt has an atomic number of 27 and an atomic mass of approximately 59
AMU. How many neutrons does it have? Show all your calculations for full marks.
I
28
tv
I need help fast 50 points

Answers

Answer 1

Answer:

7. 32neutrons

Explanation:

mass number is equal to number of protons plus the number of neutrons

the atomic number is also known as the number of protons

therefore 59-27=32

Related Questions

All waves carry? Which one on the picture

Answers

Answer:

matter

Explanation:

Answer:

All waves carry energy

How many shrimp do you have to eat before you make your skin turn pink?

Answers

Answer:

That's kind of a weird question. A lot though.

Explanation:

lot

goofy ahhAnswer:

Explanation:

What happens to a wave’s energy when it is absorbed by the road?

Answers

the medium's molecules to vibrate and move. This vibration absorbs or takes some of the energy away from the wave and less of the energy is reflected. One example of absorption is black pavement which absorbs energy from light.

When heat is produced by a reaction, would you call it a chemical change?

Answers

Answer:

However, in this case, one compound is mixed in with another, and these reactants produce a product. When the reactants are mixed, the temperature change caused by the reaction is an indicator of a chemical change. This reaction generates heat as a product and is (very) exothermic.

Explanation:

Answer:

Thermal change

Explanation:

please help me answer this question

Answers

Answer:

Pretty sure it is C

Explanation:

Due to the fact that It is talking about biotic survival

Answer:

I think part C

Because u are talking about the survivability

1. What is the mass of 200 mL of ethanol if the density of ethanol is 0.789g/mL?

Answers

Answer:

The answer is 157.8 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 0.789 × 200

We have the final answer as

157.8 g

Hope this helps you

Ahhhh Help Please! ASAP! Thanks

Answers

Answer: Argon-52

Explanation: Its B

If you had three molecules of P2SO4, how many total atoms would that be? (will mark brainliest) help me pwzz. i would really be happy if someone helps me

Answers

Answer:

pydlhdgkskydkgsoteltstositsoteotsitstositsitstitsitstssyoyos

Select the correct answer from each drop-down menu. When a car is parked in hot sunlight, the temperature of the car’s seats ____ and the thermal energy of the seats _____

Answers

When a car is parked in hot sunlight the temperature of the cars seat INCREASES and the thermal energy of the seats INCREASES

The radiation of the Sun heats the air trapped inside the car which eventually heats everything inside the car including the seats of the car.Sep 10, 2020

(The words in caps are your answer) :)

Answer:

When a car is parked in hot sunlight, the temperature of the car’s seats

increases and the thermal energy of the seats increases .

Explanation:

What type of energy results from the position of an object?

1.kinetic
or
2.potential

Answers

Answer:

kinetic energy

Explanation:

When an unknown amount of methane reacts with 40.7 g of chlorine, 40.5 g of methyl chloride and 36.5 g of hydrogen chloride form how much methane was used round to the tenth

Answers

Answer:

36.3 gram

Explanation:

CH₄ + Cl₂ = CH₃Cl + HCl

In any reaction , mass is conserved

mass of product = 40.5 + 36.5 = 77 g

Let methane reacted be x .

mass of reactant = x + 40.7

mass of reactant = mass of product

x + 40.7 = 77

x = 36.3 gram

methane reacted = 36.3 gram.

46. Which set of numbers balances this equation?. Agl + Na2S →
Ag2S + Nal
O 3,7,20
0 2,1,1,2
O 0,5,0,2
O 2,0,0,2

Answers

It will be the third one

What is the amount of heat, in joules, required to increase the temperature of a 49.5-gram sample of water from 22°C to 66°C?

Answers

The answer to your question is: 9100 J

Hi i need help please. I have to list the following forms of lights from lowest energy to highest energy:
red lights, violet lights, gamma rays, microwaves, infrared light, and radio waves. Thank you so much!

Answers

Answer:

radio waves, microwaves, infrared light, red lights, violet light, gamma rays

Imagine that you heat a pot of water to a boil (212°F), then you turn off the stove and let the water sit there. The room is at room temperature (72°F) What temperature do you predict the water cool to after sitting for 8 hours? (

Answers

Answer:

72 °F

Explanation:

Hello,

In this case, since matter tend the be stable at conditions they do not change, if we have water at room temperature (72 °F) and we heat it until boiling but then we turn off the stove, we molecularly see that due to the heat, the molecules start moving faster and crashing to each other; however when that fed energy starts being removed as the stove gets turned off, the molecules lose energy causing them to start moving slower so they lose energy until a point the remain at the initial status, that is 72 °F because thermal equilibrium is reached. Therefore it is likely for the water to be at 72 °F as well once 8 hours have passed, because a thermal equilibrium is reached with the environmetnal temperature.

Best regards.

Identify the change that will not increase the volume of a gas. Assume that all other variables are constant.
O increase the number of particles
O decrease the pressure
o increase the temperature
decrease the temperature

Answers

Answer:

increase the number

Explanation:

what is 23.54 kg x 9.8 m/s2

Answers

Answer:

230.692

Explanation:

23.54kg*9.8m/s²= 230.692

Answer:

F = 230.69 N

Explanation:

Given data:

Mass = 23.54 Kg

Acceleration = 9.8 m/s²

Force = ?

Solution:

Mass ×Acceleration is equal to force.

F = 23.54 Kg × 9.8 m/s²

F = 230.69 Kg.m/s²

Kg.m/s² = N

F = 230.69 N

Cocoa powder dissolves in milk. Cocoa is the ___ and milk is the ___

solute, solvent

Answers

Cocoa is the solute and milk is the solvent.

Cocoa powder dissolves in milk. Cocoa is the solute and milk is the solvent

What will happen when a reactant is added to a system at equilibrium?

Answers

Answer:

the equilibrium of the system will be upset.

Explanation:

a p e x

When counting the electron groups around the central atom to determine its shape, select the 4 ways that electron groups would be counted

Answers

By orbital, first orbital has 2 next is 8 and third is 8, if there are 3 orbitals do (2+8, which is simple) and then count the outer most orbital if it has for example 5 the electrons are 2+8+5.

newly discovered substance on Mars has a mass of 2.3x10-5,g and volume of
200 ml. What is its density in g/mL?

Answers

Answer:

The answer is

[tex] \huge 1.15 \times {10}^{ - 7 } \: \: g/ml \\ [/tex]

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{2.3 \times {10}^{ - 5} }{200} \\ [/tex]

We have the final answer as

[tex]1.15 \times {10}^{ - 7 } \: \: g/ml[/tex]

Hope this helps you

Will award 40 points! Is my answer correct??

Answers

I don't see any questions or answers...

can someone walk me through how to solve this?

Answers

All you have to do is find the density for I guess all of the points and u just do density=mass/volume and the mass and volume are on the x and y-axis so there’s ur data and they should all end in “g/Ml”

What do you call a combination of potential and kinetic energy?

Answers

I think is Mechanical energy

which non metal is the most reactive?
lithium
cesium
chlorine
iodine

Answers

Answer:

iodine

Explanation:

You are part of a scientific team designing a space probe that will land on Saturn's moon Titan. Your task is to write a report detailing the conditions the probe will need to withstand and propose some materials to be used in the construction of the probe.

Answers

Answer:

Material required to construct the Probe is :

Palladium based alloy, nickel based alloys, rhenium tungsten, wires, piping, duct, roofing membrane, aluminium or titanium body and circuit.

Explanation:

Probe is a robotic aircraft used to explore the galaxy. It does not revolve in the orbit. It goes beyond the orbit and explores the different planets. These probes are used by scientists to collect information regarding the space without sending an astronaut. Probes are sent into the space, they collect information and transmits data to the scientists on earth.

A tide with the largest difference between water levels at high and low tides is known as a spring tide. Two spring tides occur in each lunar cycle. This is because a spring tide occurs when the Moon
A
is closest to Earth.

B
and the Sun pull on Earth at a 90° angles.

C
and the Sun are aligned and pull on Earth.

D
is farthest from Earth.

Answers

Answer:

C is the answer

Explanation:

Tidal cycles are affected by lunar day, semidiurnal and diurnal, lunar nodes, axial tilt ... Their tidal forces act to reinforce each other, and the ocean both rises higher and ... Tidal ranges - differences between neap tides and spring tides - graph ... The perigee of the moon can occur at any point in the orbit around the earth due ...

The correct option is option C among all the given options. This is because a spring tide occurs when the Moon and the Sun are aligned and pull on Earth.

What is tide?

Any periodic deformation of one astronomical entity brought on by the gravitational pull of another is referred to as a tide. The most well-known are the regular fluctuations in Earth's sea level that are caused by shifts in the Sun's and Moon's relative locations. You can think of the tides as driven waves, flowing waves, and standing waves.

A tide with the largest difference between water levels at high and low tides is known as a spring tide. Two spring tides occur in each lunar cycle. This is because a spring tide occurs when the Moon and the Sun are aligned and pull on Earth. The Moon's ability to produce tides results from changes inside its gravitational field across Earth's surface in comparison to its strength at the planet's center.

Therefore, the correct option is option C among all the given options.

To learn more about tide, here:

https://brainly.com/question/3304072

#SPJ6

Why are atomic masses not whole numbers?

Answers

Answer:

This is because, the atom mass of an atom is the average of the atomic masses of all its isotopes multiplied by their abundance in nature. Therefore, is it highly unlikely to get a whole number as the atomic mass.
Another reason is that, since carbon-12 is the reference atom, the atomic mass is calculated relative to it.

Atomic mass is never an integer number for several reasons: The atomic mass reported on a periodic table is the weighted average of all the naturally occuring isotopes. Being an average it would be most unlikely to be a whole number. The mass of an individual atom in atomic mass units is the mass relative to carbon-12.

True or False: Mechanical weathering is the breakdown or rock by changing its chemical composition.

Answers

Answer: False

Explanation:

That’s not using mechanics

Answer:

False

Explanation:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.

Hope this helps☺️

Brainliest!
Ionic or Covalent bond??? Cu, and F

Answers

An ionic bond is where one atom takes one valence electron from the other. ... The Si-F is one of the most polarized covalent bonds and has a lot of ionic character.

Answer:

Ionic

Explanation:

Main distinction between ionic and covalent bonding

What is the main distinction between ionic and covalent bonding? Electrons aren't equally shared in an ionic bond. The electronegativity difference is closer to zero in a covalent bond. ... If the difference is large, the bond is ionic.

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