Chemistry High School

I need help with this , here are the words ( black,radiation, time, holes and universe

Answers

Answer 1

Black holes….. universe……. radiation……. time

Related Questions

using the standard enthalpies of formation, what is the standard enthalpy of reaction?

Answers

Answer:

This equation essentially states that the standard enthalpy change of formation is equal to the sum of the standard enthalpies of formation of the products minus the sum of the standard enthalpies of formation of the reactants. and the standard enthalpy of formation values: ΔH fo[A] = 433 KJ/mol.

Explanation:

Hope this helps.

which solids will melt under applied pressure? check all that apply.

Answers

The answer for this question is ice

According to the forces of attraction , ice is a solid which will melt under applied pressure.

What are the forces of attraction?

Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.

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Draw the circuit symbol that would represent the 9V battery

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I hope this picture helps

Identify the cells in interphase, prophase, metaphase, anaphase, and telophase by circling the cells.

Answers

Answer: See diagram below

Explanation

Interphase- cell prepares to divide

Prophase- nucleolus disappears and chromosomes shorten

Metaphase- chromosome lines up in the center

Anapahase- chromatids are pulled apart to opposite poles

Telophase- cell about to/is divided into two

The volume of a bottle is 500cm. what is the volume of the bottle in millimeters

Answers

Answer:

5000mm

Explanation:

10mm makes 1 cm

so if we compare them:

10mm-->1cm

x -->500cm

now cross multiply:

1x-->5000

divide both sides by 1 for x to be alone

therefore we get x=5000

what is the second most abundant gas in the atmosphere

Answers

Oxygen is the second. The first is nitrogen which makes up 78% of air. Oxygen makes up 21% of air.

The three most common states of matter on Earth are solids,blank
and gases. A fourth state,blank
exists in stars and in
flashes.blank

Answers

Answer:

example:meaning of the blank you need to do complete the words

Explanation:

#CarryOnLearning

hỗn hợp E gồm 6 este có cùng CTPT C8H8O2 và đều chứa vòng benzen. Cho 68g phản ứng tối đa với V ml dd NaOH 1M đun nống, thu được 15g muối và 77,4g hh ancol Y. Giá trị của V là?

Answers

Explanation:

just a few days ago and I have a

ch4, o2 > co2, h20

1. Does this chemical reaction follow the law of conservation of matter?

2. How many atoms of hydrogen do you have in the reactants? How many atoms of hydrogen to you have in the product?

3. Give 1 reason why this chemical reaction/equation follows OR does not follow the law of conservation of matter?

Answers

1. No, it doesn't.

2. 4 Hydrogen atoms are on the reactants side and 2 hydrogen atoms on products side.

3. Because the mass of reactants is not equal to the mass of the products thus it doesn't follow the law of conservation of matter.

But on balancing the eqn,

CH4 + 2O2 > CO2 + 2H2O

The above eqn will follow the law of conservation of matter because the mass of reactants is equal to the mass of products.

new substances are formed in a chemical reaction as a result of

Answers

Answer:

New substances formed when breaking of bonds take place and new bonds get formed which results in formation of new products. That breaking of bond is a chemical change because in such a process composition of substance gets changed and forms a new substance.

A cat has volume 40 m3 and density 980 kg/m3. Calculate the mass of the cat.

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Here: 980•.0004 =3.92

A superficial dermal erythema that is classified as an exanthem is more commonly known as a(n) __________

Answers

Answer:

ITS CALLED RASH

Explanation:

What charge would an ion have if it had more electrons than protons?
A. It would have a net positive charge.
OB. It would have no charge.
C. It would have a net negative charge.
Ο Ο
D. It would be neutral, since electrons would be outside the nucleus.

Answers

Answer:

it will have a net negative charge and it is known as anion

when a solution is diluted, what happens to the number of moles of solute in the diluted solution.

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Answer: The amount does not change.

Explanation:

why are metals not used on transistors and integrated circuits

Answers

Answer:

The usage of gold is generally avoided in semiconductor technology, since it acts as a deep-level trap and recombination center, i.e. charge carriers of opposite sign do recombine at Au defects in Si and get lost to the current.

Which of the following is a physical change?

Dissolving salt in water

Digesting food

Burning wood

Oxidation

Answers

Digesting Food

Explanation I Just Know

please hep!! water has a density of 1.0 g/mL. a plastic cup floats when it is placed into a container of water. what can you conclude about the density of the plastic cup? (look at the picture)

Answers

It is less dense than water.

Water has a density of 1.0 g/mL. A plastic cup floats when it is placed into a container of water as it is less denser than water.

Density is a key notion in physics and material science that quantifies how tightly packed a substance's particles or molecules are within a certain volume. It is a measure of the mass contained in a certain amount of space that gives useful information about the properties of various materials.

It is vital to highlight that density is a material attribute that remains constant regardless of sample size. A little piece of iron, for example, has the same density as a huge iron block, despite the larger block having more mass.

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(WILL GIVE BRAINLESS )Complete the sentence describing Newton's third law of motion: For every action in one direction, O b ос Od a weaker force acts in the same direction. an equal force acts in the opposite direction. a stronger force acts in the opposite direction. an equal force acts in the same direction.

Answers

Answer:

An equal force acts in the opposite direction.

Explanation:

In 6CH4, we have 6 molecules of CH4. What is the 6 called?

Answers

Answer:

The coeffeceient

Explanation:

Do you have more human cells or
bacteria cells in your body?

Answers

There are more bacteria cells in your body than human cells.

Fossil fuels—such as coal, oil, and natural gas—come from ancient, and long dead, plant and animal matter. These fuels have been generated through millions of years of the Earth's geologic processes. Most fossil fuel reserves are found underground, relatively close to the Earth's surface.

At the current rate that human civilization is burning fossil fuels for energy, the Earth's geologic processes have no chance of keeping pace. This means that fossil fuels are a _______ energy resource.
A.
synthetic
B.
nonrenewable
C.
plentiful
D.
renewable

Answers

Answer:

Nonrenewable

Explanation:

There is a finite supply of fossil fuels

Someone pls help me I will make you brain

Match them plsss

Answers

Answer:

carbon monoxide - B

nitrogen oxides - D

particulate matter - A

sulfur oxides - C

Explanation:

not sure if i'm fully correct though

Answer:

Carbon monoxide is (B)

Nitrogen oxides is (D)

particulate matter is (A)

sulfur oxides is (C)

Explanation:

sorry if I did it wrong

1) pbo+co-->pb+co2 which type of reaction is this?
a) redox reaction
b) oxidation reaction
c) reduction reaction
d) none of the above

Answers

Answer: a) Redox Reaction

Explanation:

PbO + CO → Pb + CO₂

Oxidation States of the Elements

Reactants Products

Pb +2 0

O -2, -2 -4

C +2 +4

Since the oxidation state/number of Pb decreased, it is being Reduced.

Since the oxidation state/number of C increased, it is being Oxidized.

∴ this is a Redox Reaction

How would the boiling point of water be affected if you doubled the amount of water?

Answers

Answer:

The boiling point wouldn´t be effected. The amount of time it would take to get it to that point would increase

Explanation:

Explain the relationship between primary, secondary, tertiary consumers, and decomposers

Answers

Answer:

The organisms that consume the primary producers are herbivores: the primary consumers. Secondary consumers are usually carnivores that eat the primary consumers. Tertiary consumers are carnivores that eat other carnivores.

Who created the "plum pudding model" of the atom?

Thomson
Rutherford
Crooks
Chadwick

Answers

It was first proposed by J. J. Thomson in 1904.

Which is an outer planet?

Answers

Answer:

Saturn

Explanation:

Mercury, Venus, and Mars are all inside the asteroid belt. Saturn is outside the asteroid belt along with Jupiter, Neptune, Uranus, and if you count, Pluto

7. How do the test variables (independent variables) and outcome variables (dependent variables) in an
experiment compare?
The test variable (independent variable) and outcome variable (dependent variable) have no affect
BL A. on each other.
The test variable (independent variable) controls the outcome variable (dependent variable).
BB
The outcome variable (dependent variable) controls the test variable (independent variable).
B.C.
The test variables (independent variables) and outcome variables (dependent variables) are the same
Bi D. things

Answers

Answer:

The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.

Explanation:

Hope this helps...

how does our use of carbon stores affect the amount of co2 in the atmosphere?

Answers

Answer:

We are releasing the stored carbon into the atmosphere

Explanation:

We are releasing the stored carbon into the atmosphere, thus increasing the amount of CO2 in the atmosphere. We are releasing the carbon stores faster than they can be replenished by nature.

Our use of carbon stores increases the amount of carbon dioxide in the atmosphere.

What are carbon stores?

Carbon stores are those places present in the environment in which carbon is present in its different composition.

As it is present in the soil in the form of organic molecules and as a deposit in the sedimentary rocks of earth such as limestones, dolomite and in the deep oceans. If we uses these carbon stores then as a result carbon dioxide releases in the environment and increases its level.

Hence amount of carbon dioxide increases.

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The atomic number of an element is 10, which element does this atom represent?

Answers

Answer:

Neon

Explanation:

Neon is the Group 18 element.It is a nobel gas.electronic configuration is given by

[tex]\\ \sf\longmapsto [Ne]=1s^22s^22p^6[/tex]

Answer:

Name: Neon

Formular: Ne

Explanation:

[tex].[/tex]

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