Help me answer the question please I don’t get it this is earth science not chemistry.

Answers

Answer 1

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1. A teacher instructs her students to measure out 50.0 mL of hydrogen
peroxide for three trials of an experiment. A student measures out 37.2 mL,
38.7 mL, and 36.9 mL.
Use this information to answer the questions below (1a and 1b).
3 points
1a. Calculate the percent error for each measurement and include them
below. (For example: 1%, 2%, 3%) *

Answers

Answer:

by measuring the teacher gets to 1590

Explanation:

ndnmv drf

Matter is anything that takes up space and can be described by physical and chemical properties. Which statement
BEST differentiates chemical properties from physical properties?
A)
Physical properties are properties that can be physically seen or touched,
while chemical properties can only be found when matter is mixed with
specific chemicals.
B)
Physical properties are measured when matter changes its physical state,
while chemical properties can only be measured if matter remains in one
state for an extended time.
C)
Physical properties are difficult to measure because they require special
tools to detect, and chemical properties are easy to measure and require
not special tools to detect.
D)
Physical properties can be measured/observed without changing matter
into something else, while chemical properties describe matter's ability to
react/combine with other matter.

Answers

Answer:

Physical properties can be measured/observed without changing matter

into something else, while chemical properties describe matter's ability to

react/combine with other matter.

Explanation:

Physical Change

The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.

1 = These changes were reversible.

2= They have same chemical property.

3= These changes can be observed with naked eye.

Example :

Water converting to Ice

Water converting to gas

In this water molecule remain the same only they rearrange themselves that change its state of mater not composition

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

1 = These changes are irreversible

2 = These changes occur due to chemical reactions

3 = These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO₂ and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H₂ (g) + O₂ (g) → 2H₂O (l)

How many atoms of aluminum are in a molecule of magnesium aluminum oxide (Al2MgO4)?

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Answer:

Explanation:

A + ion (positive ion, one with extra positive charge)?

Answers

Answer:

If an ion has a positive charge then it has lost an electrons.

Explanation:

So you don't "gain" anything when the ion has a positive charge. It loses an electron which means it has more protons than electrons. Thus, the ion has a positive charge. If it "gained" an electron then it would have a negative charge.

what are parts in the human stomach

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The cardia, fundus, body and pylorus

How many molecules are there of the following compound?

5NaNO3

Answers

Answer:

84.99467

Explanation:

This should be the answer.

5 molecules Na is 1 N is 1 and O3 is 3 molecules so thats a sum of 5 molecules

6.82

A 2.10-mole sample of crystalline acetic acid, ini-

tially at 17.0°C, is allowed to melt at 17.0°C and is

then heated to 118.1°C (its normal boiling point) at

1.00 atm. The sample is allowed to vaporize at.

118.1°C and is then rapidly quenched to 17.0°C, so

that it recrystallizes. Calculate AH° for the total pro-

cess as described.

Answers

Answer:

0 kj

Explanation:

melting/initial temperature = 17.0°c

boiling point = 118.1°C

pressure = 1.00 atm

2.10 mole sample of crystalline

attached below is the detailed solution required

What is the oxidation number of Gallium?

Answers

Answer: +3

Explanation: Gallium liquefies just above room temperature. Gallium is a soft solid, however it quickly becomes liquid when heated.

Which types of reactions would result in the production of gas?
PLEASE HELP NOW!! worth lots of points

Answers

Answer:

farts

Explanation:

List and describe six forms of energy.

Answers

Answer:

Gravitational energy, electric energy, magnetic energy, nuclear energy, thermal energy, chemical energy.

Explanation:

gravitational energy - the energy resulting from the attraction of two masses to each other

electric energy - energy from a static or moving electrical charge.

magnetic energy - energy from the attraction of opposite magnetic fields, repulsion of like fields, or from an associated electric field

nuclear energy - energy from the strong force that bonds protons and neutrons in an atomic nucleus

thermal energy - also called heat, this is energy that can be measured as temperature. It reflects the kinetic energy of atoms and molecules

chemical energy - energy contained in chemical bonds between atoms and molecule

mechanical energy - the sum of the kinetic and potential energy

radiant energy - energy from electromagnetic radiation, including visible light and x-rays (for example)

1Which statement about plant cells is true? A A plant cell cannot contain both a nucleus and chlorophyll. Incorrect answer B A plant cell can contain both chlorophyll and a nucleus. Incorrect answer C A plant cell must contain chlorophyll, but can have no nucleus. Incorrect answer D A plant cell has neither a nucleus nor chlorophyll.

Answers

Answer:

B A plant cell can contain both chlorophyll and a nucleus.

Explanation:

All plants are eukaryotic organisms i.e the cells of all plants possess a membrane-bound nucleus that houses their genetic material (DNA). In addition to this, most plant cells also contain a unique organelle called CHLOROPLAST, which they use to capture the energy from sunlight in order to perform a process called PHOTOSYNTHESIS.

According to this question, plant cells can contain both chlorophyll and a nucleus. They can possess chlorophyll because chlorophyll is a pigment in their chloroplast that captures the light energy.

A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
OV
Na
Mg
Se

Answers

Answer:

Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.

Explanation:

The mass number is given at the top left of the elements symbol, for example, sodium has a mass number of 23.

Sodium (Na) square from the periodic table. The mass number (23) is top-left. The atomic number (11) is bottom-left.

We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.

The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).

Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.

what is the original name for gold

Answers

Answer:

It's Anglo Saxon.

Explanation:

From the Latin aurum, which stands for Aurora, the dawn goddess, comes the symbol Au. Early humans were aware of and highly valued gold. Gold is a beautiful and valuable metal that has been used for at least 5500 years. The original name for gold is Anglo-Saxon.

The element number 79 for gold is Au. Gold's Latin name, Aurum, or shining morning, and its earlier Greek origins predate the Anglo-Saxon term for it. It is one of the more abundant elements with a higher atomic number and exhibits very little reactivity towards the majority of atmospheric conditions, such as water and air.

Although gold is typically inert, it can react with a substance called aqua-regia. A substance called aqua regia is used to dissolve gold. Nitric and hydrochloric acids are combined to make them. The oxidizing agent will be nitric acid, which will result in the creation of gold ions.

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1.why does gravity exist?

2.what does the strength of gravity on?

3.what will have stronger force of gravity, jupiter or earth ?

This class is science !!

Answers

Answer:

Gravity exists because elementary particles (electrons, quarks, and neutrinos), are NOT static with time and expansion. Matter is dynamic; elementary particles must continually accrete energy (the quanta of space) in order to conserve the continually increasing angular momentum of the expanding universe.

Strength of gravity

9.80665 m/s 2

Jupiter

3. describe how unequal heating causes weather

Answers

Answer:

The uneven heating causes temperature differences, which in turn cause air currents (wind) to develop, which then move heat from where there is more heat (higher temperatures) to where there is less heat (lower temperatures).

Explanation:

What is the main difference between gases and liquids

Answers

Answer:

1.Liquids have less force of attraction between molecules than solids and more than gases; gases have a very weak force of attraction between the molecules which is the least amongst the three states of matter. 2.Liquids have definite volume; gases do not have definite volume.

Explanation:

:) HOPE THIS HELPS

Answer:

particles

Explanation:

particles are buzzing around very quickly when in a gas, but when in a liquid they vibrate.

Ciara’s bike has rusted, which means that the iron in the metal changed to rust.
What has occurred?

an energy formation
an exothermic reaction
a chemical reaction
a precipitate formation

Answers

Answer:

Chem Reaction

Explanation:

Cuz it big brain time

The iron in the metal changed to rust, which is a chemical reaction. Therefore, option (C) is correct.

What is the rusting of iron?

The rusting of iron is an oxidation reaction in which the iron combines with oxygen in the air in the presence of water to produce Fe₂O₃.xH₂O, a hydrated iron (III) oxide.

This hydrated iron (Ill) oxide is rust and the color of rust is reddish-brown. This reddish-brown rust can be seen on iron nails, pipes, and railings. on. Rust is formed when the iron is exposed to oxygen in the presence of moisture and is not an instantaneous reaction. Rusting of iron takes place over a long period of time.

Fe (s) + O₂ (g) + xH₂O (l) → Fe₂O₃. xH₂O (s)

The oxidation state of iron increases which is followed by the loss of electrons as a result of the rusting reaction. Iron(III) oxide or ferric oxide has the iron atom has an oxidation state of +3.

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Sunlight shining through a clear window it’s Jeremy’s face while he does his homework he uses a large wooden wooden block to cover the window what do the wooden block in the clear window demonstrate

Answers

I would have to know the subject

For lunch you have a glass of sweetened ice tea. The glass contains crushed tea leaves, sugar, a slice of lemon, and both liquid and frozen water (ice cubes). Which of the following categories of matter best describes the contents of the glass? *

Answers

Answer:

I think solids

Explanation:

sorry if its not right

In an ionic bond
a. electrons are shared equally
b. protons are transferred
c. electrons are shared unequally
d. electrons are transferred

Answers

Answer: a chemical bond; in which one atom donates an electron to another atom

Explanation:

In Bohr’s model of the atom, where are the electrons and protons located?

Answers

The electrons move around the protons, which are in the center of the atom.

A sample of gas has a volume of 10 ml at 2 atm. The pressure increases to 4 atm. What is the new volume?

Answers

Answer:

The answer is 5 mL

Explanation:

In order to find the new volume we use the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

We have

[tex]V_2 = \frac{10 \times 2}{4} = \frac{20}{4} \\ [/tex]

We have the final answer as

5 mL

Hope this helps you

If a substance has a density GREATER
than the liquid it's in, then it will

Answers

Answer:

sink

Explanation:

a substance with a higher density than others will sink and vice versa

How many atoms are in a sample of 2.89 moles of potassium (K)?

Answers

Answer:

The answer is

1.74 × 10²⁴ potassium atoms

Explanation:

To find the number of atoms given the number of moles we use the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 2.89 moles

We have

N = 6.02 × 10²³ × 2.89

We have the final answer as

1.74 × 10²⁴ potassium atoms

Hope this helps you

What is a stable electron configuration?

Answers

They have two or eight electrons in their valence shell. They do not gain, lose or share electrons.

I NEED HELP!!! How is continental crust different from oceanic crust?

Oceanic crust is thinner and more likely to sink.

Oceanic crust is thicker and more dense.

Continental crust is more dense and lighter.

Continental crust is thicker and more likely to sink.

Answers

Answer:

Explanation:

Oceanic crust is thinner and more likely to sink

Answer:

The answer is A Oceanic crust is thinner and more likely to sink.

Explanation:

I hope this is right sorry if it's not.

Are hemoglobin formation and functioning brains and muscles benefits of Iron?

Answers

Whats a homogoblen? Not even sure what to say to this question

Please help ASAP I’ll make you u as brainlister please 100 points pelaseee

Answers

Answer:

Explanation:

Answer:

Explanation:

consider an iron cube and an aluminun cube. If the two cubes were at the same temperature, how would the average kinetic energy of the particles in iron compare with the average kinetic energy of the particles in aluminun

Answers

Answer:

I think there would be no differences

Which element am I? Give my symbol ONLY! What a robber says as he's running away!

Answers

Answer:

ummmmmmmmmmmmmmmm..mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm.................... candyunicorns1999 has left the chat

Answer:

Explanation:

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