Chemistry High School

Please help- D;

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Please Help- D; .....

Answers

Answer 1

Answer: Silicon dioxide

Explanation:

di is 2 and since oxygen is 2

Related Questions

What happens to the pitch when the frequency of a sound wave decrease?


A it stays the same


B it decreases by that same amount


C it increases twice the amount


D it increases by the same amount

Answers

Answer:

B

Explanation:

Pitch is determined by frequency. So if frequency increases, pitch increases and produces a higher sound. If frequency decreases, pitch decreases and produces a lower sound. Frequency and wavelength are inversely related, meaning that if frequency increases, wavelength becomes shorter and vice versa

How does water pressure relate to depth?

Answers

The deeper you go under the sea, the greater the pressure of the water pushing down on you. For every 33 feet (10.06 meters) you go down, the pressure increases by one atmosphere . Many animals that live in the sea have no trouble at all with high pressure

6) The following questions refer to F2 and Cl2.
a. Draw the molecular model (space-filling or ball-and-stick) that would
provide the best means for comparing the differences in bond length and
bond energy.
b. Which structure has the longest bond length? Justify your answer.
c. Which bond has the greatest bond energy? Justify your answer.
d. Which structure has the least potential energy associated with its bond?
Justify your answer.

Answers

Answer:

chill

Explanation:

How is a chemical equation different from a chemical formula?

Answers

Answer:

Explanation:

A chemical formula is the combination of atomic symbols that designate a particular chemical compound, or a substance with two or more different elements.  The formula shows which type and how many of each element makes up that specific compound

What are two properties that make a metal a good choice to use a wire in electronics? *

Answers

Answer:

Explanation:

The two properties that make a metal a good choice to use a wire in electronics are :

ductility   conductivity

Explain what the periodic table is and how it's organized

Answers

Answer:

The periodic table is a set of elements organized by their atomic number, from lowest (hydrogen 1) to highest (oganesson 118). That number is the amount of protons in the nucleus of an atom of the element. The table is split into three groups of elements (metals, nonmetals and metalloids). As you go down the table the elements are more reactive.

Explanation:

^^

CO2+ H2O + hν → C6H12O6 + O2
ayudenme plisss

Answers

Answer:

This is the balanced equation I believe-

6CO2 + 6H2O → C6H12O6 + 6O2

However, that is without the HV because I’m not sure what the hv means.

The most penetrating form of radiation is __ radiation.
a. alpha
b. beta
c. positron
d. gamma

Answers

D gamma is the answer

Answer: gamma. it is extremely deadly to living tissue

Explanation:

Can someone please help me with the with this

Answers

Answer:

Chemical

Explanation:

is Copper(II) hydroxide ionic

Answers

yes it is ionic it can form two ionic bonds
Yes it is because its involves a metal and a non-metal.

When you name a binary compound, you have to add____ to the ending of the second element in the compound.

A) -ate
B) -ide

Answers

Answer:

B - ide

Explanation:

Plants cannot grow too close together because their Blank______ need to spread out and absorb nutrients from the soil.

Answers

their roots need room to spread out

give two areas where the compressible nature of gas is applied​

Answers

Answer:

1. Gases can be easily liquefied into very small volumes and stored in liquid form Eg in LPGA cylinders and used in homes.

2. Balloons can be easily filled with air.

The fact that a gas is easily compressible is applied in the colling devices such as air conditioners as well as in the pumping of tyres with air.

Are gases compressible?

Gases are easily compressible because they do not have a definite volume. This is positively applied in many areas of life.

The fact that a gas is easily compressible is applied in the colling devices such as air conditioners as well as in the pumping of tyres with air.

Learn more about compressibility of gases:https://brainly.com/question/12105531?

#SPJ6

A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over
the next few minutes?


A. Molecules in both the metal and the surrounding air will start moving at lower speeds.
B. Molecules in both the metal and the surrounding air will start moving at higher speeds.
C. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
D. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down

Answers

B. Molecules in both the metal and the surrounding air will start moving at higher speeds.

when gas changes to liquid is it gaining or loosing energy?

Answers

When a gas changes into a liquid, it is called condensation. ... When a liquid changes into gas, it is called evaporation. Phase changes are usually caused by changes in temperature or pressure. As the states of matter change from solid to liquid to gas, respectively, their composition changes as well.

Answer:

Loosing energy

Explanation:

As the particles movement in gas slows down further when it is cooled

What can air pollutants do?

Answers

Answer:

Air pollution can also cause headaches, dizziness, and nausea. ... Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs.

Explanation:

volume of 5.2 X 10^26 molecules of CH4

Answers

Answer:

19348.84 L

Explanation:

At STP, we know that;

6.02 × 10^(23) molecules = 22.4 L

Therefore, 5.2 × 10^(26) molecules = 5.2 × 10^(26) × 22.4/(6.02 × 10^(23)) = 19348.84 L

Thus, volume of CH4 with 5.2 X 10^26 molecules is 19348.84 L

For the reaction 2NH3(g) + O2(g) -> 2NO(g) + 3H2O(g). The reaction is run using 824 g NH3 and excess oxygen. How many moles of NO are formed? How many moles of H2O are formed?

Answers

Answer:

Explanation:

Step One

Find the molar Mass of NH3

N =   14

3H =  3

Mass = 17

Step Two

Find the number of moles of NH3

mols = given mass / Molar Mass

given mass = 824 grams

molar mass = 17

mols = 824/17

mols =  48.47

Step Three

Find the moles of NO

Here you have to look at the balanced equation

Every 2 mols of HN3 produces 2 mols of NO

So the number of mols of NH3 = 48.47

The number of mols of  NO      = 48.47

Step Four

Find the mols of H2O

2 mols of NH3 produces 3 moles of H20

48.47 mols H20 produces x moles of H20

3/x = 2/48.47     Cross Multiply

2x = 3*48.47

2x = 145.41         Divide by 2

x = 145.41/2

x = 72.71            mols of water.

I WILL MARK Brainest
Hi, I really need help, my mental health is horrible right now and I can’t do any work, and I really just need help answering these questions because I really don’t want to get bad marks but I don’t have the motivation to do anything, thanks so much!

Answers

It should be sketch,identify, dig, then set water for the watering times, hope this helps, hope you feel better soon

Can someone please help

Answers

Answer:

Water is the answer

Explanation:

A violent disturbance in the atmosphere is a
eye of hurricane
surge
front
storm

Answers

Answer: Storm surge

Explanation:

If a compound has 27.36 % Na, 1.20 % H, and 57.14% 0, with the rest being
carbon. What is the percent of carbon in the compound?

Answers

Answer:

14.3% C

Explanation:

27.36 + 1.20 + 57.14 = 85.7

100 - 85.7 = 14.3%

Ecosystems are constantly _______________ (changing, remain the same) in the ________________ (same, different) ways over time.

Answers

Answer:

changing

different

Explanation:

ANSWER:
1 changing
2 same

Explanation: eco systems are something that animals an insects adapt to an live in so if there is a change in weather or whatever it may be ecosystems are always changing

I NEED THE ANSWER ASAP IM ON A TIMER

Answers

That’s tuff, lol stay in school.

Please help due today!

Answers

Answer:

It's the first answer choice for sulfur and the second answer choice for magnesium I believe

Which type of plate boundary is associated with seafloor spreading at the source of the spread: convergent, divergent, or transform?

Answers

Answer:

The answer is divergent

Sand dunes are large piles of of sand that can be found in the dessert. What causes these sand dunes to form
A. Ice
B. Wind
C. Earthquakes
D. Volcanoes

Answers

B. Wind

Explanation: fun fact: wind also moves rocks

This reaction supports the Law of Conservation of Mass (hint: is the equation balanced?):
2KOH ® K20 + H2O True or
False

Answers

Answer:

False

Explanation:

Left:

K = 2 atoms

O = 1 atoms

H = 1 atoms

Right:

K = 2 atoms

O = 1 atoms

H = 2 atoms

O = 1 atoms

As you can see both sides do not have the same amount of atoms, therefore it is not balanced.

Hope this Helps!!

:)


A student says that since the atomic theory is just a theory, it should not be considered useful. Which
statement best argues against the student's opinion? (2 points)
O Scientific theories change over time.
O Scientists often do not agree about specific details of scientific theories.
O Scientists often propose competing theories.
O Scientific theories do not become Scientific Laws.
O Scientific theories are the results of many experiments and observations.

Answers

Answer:

O Scientific theories are the results of many experiments and observations.

Explanation:

Going through the options;

O Scientific theories change over time.

This is true and supports the student's opinion. So wrong option!

O Scientists often do not agree about specific details of scientific theories.

This is true. However, it supports the student's opinion. So wrong option!

O Scientists often propose competing theories.

This is true. However, it supports the student's opinion. So wrong option!

O Scientific theories do not become Scientific Laws.

This is False. Theories that have withstood the test of time and countless experiments become laws. However it support's the student's opinion. So wrong option!

O Scientific theories are the results of many experiments and observations.

This is true and is against the student's opinion. This option is correct!

mg+o2 balanced eaquation

Answers

Answer:

2Mg+O2=2MgO

balanced equation

hope it helps.

Answer:

Oroduct is mgo and it is balanced equation

Because both MG and o² have valence 2

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