Chemistry High School

Can someone help me please :)

Answers

Answer 1

I think it’s the third option but I’m not entirely sure

Answer 2

I’m sure it’s the third one!

Related Questions

How many valence electrons must Calcium lose when forming an ionic compound with Bromine?

Answers

Answer:

Explanation:

The article states that amplitude plays a role in what happens to a sound
wave. Why do you think higher amplitude waves are more often
transmitted while lower amplitude waves are reflected or absorbed?

Answers

Answer:

Sound waves travel through matter

Explanation:

Higher amplitude sound waves are more likely to be transmitted through matter instead of reflected. Lower amplitude sound waves are more likely to be reflected or absorbed, resulting in a lack of an echo. Sound can travel through air, water, and solids

Why do scientist use the scientific method

Answers

Answer:

Explanation:

scientists always look for evidence

Answer:

Yea its B

Explanation: The person above me legit toke the answer out of my mouth

Please help
I will give a brainliest

Answers

THe correct answer is heat

Answer:

Explanation:

heat

A closed container is the best way to measure the volume of a
A. gas
B. liquid
C. solid
D. Both A and B are correct.

Answers

Answer:

A closed container is the best way to measure the volume of a liquid

Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.

Answers

Answer:

Chemical Energy is energy stored in the bonds of atoms and molecules. Batteries, biomass, petroleum, natural gas, and coal are examples of stored chemical energy. Chemical energy is converted to thermal energy when we burn wood in a fireplace or burn gasoline in a car's engine.

MARK BRAINLIST PLZ NEEDS ONE MORE

Explanation:

How can calcium oxide change directly to limewater?
Wants equation and observation

Answers

Answer:

Lime(Calcium Oxide) is a white solid with strongly basic properties.Lime reacts readily with water to produce slaked lime,which is the chemical compound calcium hydroxide.....

When carbon dioxide gas is passed through or over limewater,it turns milky due to the formation of calcium carbonate.

Can someone help me with these two questions

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4. The pressure of the inner core is higher than the outer core

5. The coolest layers are farthest from the core

Please help due soon fill in the blanks will give brainliest

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Answer:

Proton has positive charge (+) and located in nucleus

Electron has negative charge (-) and located in electron cloud

Neutron has neutral charge (0) and located in nucleus

1pt Twins raised in different families still exhibit similar mannerisms, indicating that at least some behavior is
O A. genetis
OB. environmental
O C. instinctual
OD. learned

Answers

The answer is A, genetic.

Twins reared apart help identify genetic and environmental influences on behavioral development, this allowed direct estimates of genetic effects on behavior and health, because they share all their genes, but differ in their environments.

6/14and3/7 answer 6/11and9/16answer 5:6=10:12answer

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your question was incomplete.............. you haven't mentioned any required information

The diagram below shows the apparatus used to pass a current through copper
sulfate solution.
1 x
Positive electrode
Negative electrode
Copper sulfate solution
What is the name of component X in the diagram above?
point
Fuse
Switch
оооо
Ammeter
O Battery

Answers

i think the answer is b) i.e. Switch....

according to me ammeter and battery are already there...

If we react 5.4g of sodium chloride with an unknown amount of fluorine gas, we produce 4.9g of sodium fluoride and 3.7g chlorine gas. How much fluorine was consumed in the reaction?

Answers

Answer:

4.43 g

Explanation:

The reaction between sodium chloride and flourine gas is given as;

NaCl + F2 --> NaF + Cl2

From the stochiometry of the equation;

1 mol of NaCl reacts eith 1 mol of F2 to form 1 mol of NaF and Cl2

Mass of 1 mol of F2 = 38g

Mass of 1 mol of sodium flouride, NaF = 42g

This means 38g of flourine reacted with NaCl to form 42g of NaF

xg of F2 would form 4.9g of NaF

38 = 42

x = 4.9

x = 4.9 * 38 / 42

x = 4.43 g

I will need help plz thank you

The Earth's surface is _____ water.

50 %

71 %

97 %

Answers

Answer:

71%

Explanation:

71% explanation: About 71 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water. Water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers, and even in you and your dog. Water is never sitting still.

What does the salinity of seawater represent?

The concentration of salt dissolve in the ocean
The concentration of all dissolved chemicals in the ocean
The volume of salt in the ocean
the mass of salt in the ocean

Answers

Answer:

Salinity is a measure of the 'saltiness' of seawater, or more precisely the amount of dissolved matter within seawater.

What is the percent composition of nitrogen in N 2 O

Answers

Answer:

28 %

Explanation:

Mass mass N2O = 28 + 16 = 44 mass nitrogen = 2 x 14 = 28 % nitrogen Chemistry.

can someone please help me, i'll give you a 5 star rating and brainliest answer

Answers

there are 2 hydrogen and one oxygen. oxygen needs 2 bonds to be complete and hydrogen only needs one. so to be complete oxygen needs 2 hydrogen in order to become h2o.

Bohr's model of the atom attempts to explain the idea that
the atom is mostly empty space
O all atoms of one type of element are identical
O energy is quantized
O protons and neutrons are found in the nucleus

Answers

Answer:

O energy is quantized

Explanation:

Bohr's model of that atom attempts to explain the idea that energy is quantized within an atomic space.

In 1913 Neils Bohr put forward his own model of the atom based on the quantum mechanics developed by Planck. He suggested that the extranuclear part consists of electrons in specific spherical orbits around the nucleus. As one moves outwards from the nucleus the energy level increases.

Newton wrote the mathematical concepts to prove the _____ shape of planet’s orbits.
spherical
circular
triangular
elliptical

Answers

Answer:

Eliptical

Explanation:

While some orbits may seem circular, like Earth's, it is still an ellipse. Planets orbit stars in an elliptical shape, but some come very close to perfect circles. As for the other two, im certain you have never seen a triangular or spherical orbit. Hope this helps.

Which equation is balanced in an acidic solution?

Answers

Answer:

I think C but it could be D

Explanation:

I would say go for C

A student claims that a large percentage of water on Earth is immediately available to drink. Is he correct? Why or why not?

Answers

Answer:

No, the student is not correct. The earth may have a lot of water... but not every part of water is drinkable. Most water is filled with bacteria and or viruses making it not suitable to drink! :)

Explanation:

HOPE THIS HELPS! BRAINLIEST? :)

Please help quick
1) How much heat does 23.0 g of water absorb as its temperature increases from 25.4 °C to 42.8 °C?

2) A sample of unknown metal has a mass of 120.7 g. As the sample cools from 90.5 °C to 25.7 °C, it releases 7020 J of energy. What is the specific heat of the sample?

Answers

Answer:

c = 0.898 J/g.°C

Explanation:

1) Given data:

Mass of water = 23.0 g

Initial temperature = 25.4°C

Final temperature = 42.8° C

Heat absorbed = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Specific heat capacity of water is 4.18 J/g°C

ΔT = 42.8°C - 25.4°C

ΔT = 17.4°C

Q = 23.0 g × × 4.18 J/g°C × 17.4°C

Q = 1672.84 j

2) Given data:

Mass of metal = 120.7 g

Initial temperature = 90.5°C

Final temperature = 25.7 ° C

Heat released = 7020 J

Specific heat capacity of metal = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 25.7°C - 90.5°C

ΔT = -64.8°C

7020 J = 120.7 g × c × -64.8°C

7020 J = -7821.36 g.°C × c

c = 7020 J / -7821.36 g.°C

c = 0.898 J/g.°C

Negative sign shows heat is released.

The level of CO2 in the blood is detected by chemoreceptors located in the aortic arch
and carotid arteries. These send impulses to either the cardioaccelerator or
cardioinhibitor center in the hypothalamus of the brain, which in turn sends an
impulse to the pacemaker of the heart to increase or decrease heart rate. Draw a
feedback diagram to illustrate what happens to restore homeostasis when blood CO2
rises.

Answers

Answer:

The level of CO2 in the blood is detected by chemoreceptors located in the aortic arch

and carotid arteries. These send impulses to either the cardioaccelerator or

cardioinhibitor center in the hypothalamus of the brain, which in turn sends an

impulse to the pacemaker of the heart to increase or decrease heart rate. Draw a

feedback diagram to illustrate what happens to restore homeostasis when blood CO2

rises.

Explanation:

The level of CO2 in the blood is detected by chemoreceptors located in the aortic arch

and carotid arteries. These send impulses to either the cardioaccelerator or

cardioinhibitor center in the hypothalamus of the brain, which in turn sends an

impulse to the pacemaker of the heart to increase or decrease heart rate. Draw a

feedback diagram to illustrate what happens to restore homeostasis when blood CO2

rises.

Balance the following chemical equation by providing the correct coefficients.

Na + H2O ———— NaOH+H2
Please help!!!!!!!!

Answers

Answer:

2, 2, 2, and 1

Explanation:

I put that in and it was correct.

Lucy volunteers at an animal shelter, and she takes care of an orange tabby 1 point
cat and her kittens. Some of the kittens have orange markings, but some
have gray markings. What units of genetic material determine how living
things look?

Answers

Answer; the answer is variations

The unit of genetic material that determines how living things look is called variations, look below for more description.

What are genetic variations?

Hereditary variety alludes to contrasts among the genomes of individuals from similar species. A genome is all the innate data — every one of the qualities — of a creature. Hereditary variety is the distinction in DNA successions between people inside a populace.

For example, the human genome contains somewhere close to twenty and 25 thousand qualities.

Find more information about Genetic variations here:

brainly.com/question/14926046

The substance that cannot be broken down into a simpler form by ordinary chemical means is called a __ ?

Answers

Answer:

Elements

Explanation:

An element is any substance that cannot be broken down into simpler form by ordinary chemical means.

Elements are distinct substances that cannot be split up into simpler substances. .

Such substances consist of only one kind of atom. There are over hundred elements known till date. Elements are made up of unique atoms. In a chemical reaction, elements combines and rearranges.

How many atoms of beryllium are equal to 0.39 moles of beryllium?

Answers

Answer:

2.35 x 10²³atoms

Explanation:

Given parameters:

Number of moles of Be = 0.39moles

Unknown:

Number of atoms = ?

Solution:

To solve this problem:

1 mole of a substance contains 6.02 x 10²³ atoms

0.39 mole of Be will contain 0.39 x 6.02 x 10²³ = 2.35 x 10²³atoms

A vector is a quantity with magnitude and ____

Answers

A direction . A vector quantity.

Answer:

direction

Explanation:

A P E X

1. What happens when an electric current is applied to a tube filled with a gas, like neon, electrons...

Answers

It goes boom I think

Answer:

When an electric current is passed through a gas, the gas emits light. Neon signs operate in this way; a tube having an electrode at each end is filled with a gas at low pressure and a high voltage (generally in the range of 1000 to 5000 volts) is applied to the electrodes.

Explanation:

PLZ HELP!!!!!asapnow

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Answer:

Friction of wind against the ocean surface

friction of wind against the ocean surface

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