Chemistry Middle School

HELPPPPPPP!!!!!!!!!!

Answers

Answer 1

Answer:

It is D

Explanation:

Im 90% percent sure

Answer 2

It’s D hope it helps

Related Questions

help pls i will give brainlest

Answers

Answer: its 5ft tall and 12 inches

Explanation:

The answer is 5 foot 12 inches

How do the properties of each of these materials vary? Paper and Cardboard, Plastic, Wood, Metals

PLEASE HELP NOW

Answers

They are all made from trees

The properties of all of these material vary from each other. Paper, cardboard and plastic are insulators and metals and conductors. Each of them has different physical properties.

What are physical properties ?

The physical properties of a substance include properties which changes its physical structure, size, shape, phase etc. Solubility, conductivity, resistance etc. are also physical properties.

Here, paper, cupboard and plastic are insulators and they does not conduct electricity. Whereas, metals are very good conductors and they have wide range of applications in optoelectronic devices.

Each of these materials has different melting temperature and different uses. Their density also vary significantly. The paper is the less dense one here and metals are denser.

The applications of these materials are based on their physical properties.

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Which of these themes is common to both stories?
the importance of friendship
how unreliable magic is--you can’t count on it
power makes people behave badly

Answers

Answer:

Explanation:

Ndnddkdndndndndnenndndndnekekeke dkdkejeneje ieekkeekke elekekeke kekeneke ekekekek ekekeke

Describe three abiotic and three biotic components of an ocean marine ecosystem.

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Answer:

abiotic sand sunlight water currents

biotic fish bacteria jellyfish

pretty sure this is right

because biotic is living and abiotic is nonliving

Abotic sand
Boric fish

Plz help!!!!!!!!!!!!!!

Answers

I think it’s d
If it’s wrong then I’m sorry

Answer:

Explanation:

Which of these statements best describes which traits are expressed by an organism? A. An organism expresses all the traits for which it carries genes.
B. An organism expresses only the traits whose genes are inherited from a parent.
C. An organism expresses only the traits whose genes it will pass on to its offspring.
D. An organism expresses some traits for which it carries genes while others are dominant

Answers

The statement that best describes which traits are expressed by an organism is A.

An organism expresses all the traits for which it carries genes. This is because an organism's traits are determined by the combination of genes it carries, which includes both dominant and recessive genes. Even if a trait is not expressed in an organism, it can still be carried in its genes and passed on to its offspring. Therefore, all the traits for which an organism carries genes have the potential to be expressed in either the organism or its offspring.

B-An organism expresses only the traits whose genes are inherited from a parent.

ZOOM IN TO SEE, But which one would be the correct answer this is easy!

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Answer:

Explanation:

The correct choice is b

Individual organisms have a variety of traits that make them different from each other. Traits such as fur color and eye color vary from one individual to another. What determines the traits of an individual organism?

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Answer:

Traits can be determined mostly by genes but can be by environmental factors, or a combination of both. Traits can be qualitative (such as eye color) or quantitative (such as height or blood pressure) A given Trait is part of an individual's overall phenotype.

I hope this helps you out!

Phenotype, dna I think I’m not really sure but I tried, I’m just starting this

Please help (i know this is a lot but it makes no sense!!!!)

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Is this math or chemistry....:

In your own words, explain how gametes (the cells made for sexual reproduction) differ from normal body cells.

Write your response below.

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Answer:

gametes have to become haploid - they have to reduce their genetic material to a single copy, while somatic cells are diploid

Explanation:

The human gametes differ from all the other cells in the boy because the somatic cells have a complete set of chromosomes but gametes only have half a set of chromosomes.

pls i need answers to the 1st, 2nd, and 3rd question

Answers

I believe number one has 2 valance electrons

number 2 has 1 valance electron

and number 3 has 8 valance electrons

valance electrons are the electrons on the outermost ring

I agree with the 1st answer

which phrase describes air pressure O decreases with denser air O decreases as altitude decreases O equals mass divIded by Volume O decreases as a result of fewer air particles pushing down

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Air pressure decreases as altitude decreases. This phenomenon occurs because the atmosphere's density diminishes with increasing height above the Earth's surface and the correct option is option 2

As one ascends to higher altitudes, there are fewer air particles above, leading to a decrease in air density. Consequently, the pressure exerted by the air decreases at higher elevations.

Conversely, at lower altitudes, the air is denser due to the larger number of air particles above, resulting in higher air pressure. This relationship between air pressure and altitude is crucial for understanding weather patterns, climate changes, and the functioning of various natural processes on Earth.

Thus, the ideal selection is option 2.

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Answer B decreases as altitude decreases

How many independent variables can be tested in a controlled experiment? Please HELP!!

Answers

Answer:

One independent variable

Explanation:You should generally have one independent variable in an experiment. This is because it is the variable you are changing in order to observe the effects it has on the other variables.

Answer:

one independent variable

How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

Answers

Answer:

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Relative Atomic Mass = Mass of one atom
———————————
(1/12)th Mass of one C12 atom

first used the term cell when he used a (5)_____ to observe box-like structures when he was examining cork under a microscope. (6)_____ also saw what we know know as (7)_____ when looking at pond water. These observations, along with the observations of several other scientists over the course of 200 years, lead to the development of the (8)_____.

Answers

Answer:

sorry if its wrong.

Explanation:

(5) a cell was used to refer to these tiny units of life

(6) Robert Hooke

(7) cell walls

(8) modern cell theory. im so sorry if im wrong.

7: How many times can a volcano erupt?

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Answer:

Some small volcanoes only erupt once in their lives,

while other volcanoes erupt multiple times. Kilaeua volcano in Hawaii, which has been erupting continuously since 1983, is the world's most active volcano. While some volcanoes erupt at regular intervals, there are always exceptions to the rule

Answer:

small volcano's only 1 time while big volcano's mutiple times

Explanation:

help plz?
explain what is sorted sediment. why does it occur?

Answers

Answer:

Particles become sorted on the basis of density, because of the energy of the transporting medium. High energy currents can carry larger fragments. As the energy decreases, heavier particles are deposited and lighter fragments continue to be transported. This results in sorting due to density.

Explanation:

Particles are sorted based on density’s

Which statement is true regarding kinetic energy and potential energy?

Both kinetic energy and potential energy rely on motion.

Both kinetic energy and potential energy are stored energy.

Potential energy relies on motion, while kinetic energy is stored energy.

Kinetic energy relies on motion, while potential energy is stored energy.

Answers

Answer) Kinetic energy relies on motion, while potential energy is stored energy.

Answer: kinetic energy relies on motion, while potential energy is stored energy.

Explanation:

PLEASE HELP THESE ARE MY LAST 3 QUESTIONS LEFT AND IM HAVING TROUBLE WITH THEM
1. CH18C20H15CHCO2 How many atoms of each element are in one molecule of cardenolides?

2.How many atoms are in mercury (I) phospate? The chemical formula is (Hg2)3(PO4)2

3.The burning of hexane is shown in the following chemical equation. How many oxygens are in the products to the right of the arrow? 2C6H14 + 19O2 → 12CO2 + 14H2O + heat

Answers

Answer:

2)Hg2 3 po4 2

Mercury(I) Phosphate (Hg2)3(PO4)2 Molecular Weight

3)2C6H14 + 19O2 → 12CO2 + 14H2O + heat

Explanation:

i dont know the 1st one i ggoles the 2nd one and it gave me this, hope it helps

Which correctly lists the three gases that are part of Earth's cycles in both the atmosphere and biosphere?
O radon, carbon monoxide, oxygen
O carbon dioxide, nitrogen, oxygen
O nitrogen, carbon dioxide, carbon monoxide
O carbon dioxide, radon, oxygen

Answers

Answer:

The correct answer is actually, B) carbon dioxide, nitrogen, oxygen

Answer:

Explanation:

What is one way that potential energy might be involved in rescue team missions?

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Answer: The rescue workers can get energy to the batteries in their equipment during rescue missions by using a generator to convert the kinetic energy to potential energy. Potential energy is then stored in the battery.

Explanation:

From a quizlet i found online.

Answer:by using a generator to convert the kinetic energy to potential energy. Potential energy is then stored in the battery

I just need help all I need is the answer please some one

Answers

Answer: The correct fill-in-the-blank answers are:

1. through binary fission (already filled in)

2. be resistant to penicillin

3. through asexual reproduction.

4. cell replicates before

5. a simpler process

Explanation:

The correct fill-in-the-blank answers are:

1. Bacteria reproduce through binary fission (already filled in)

2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin

3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.

4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.

5. Asexual reproduction is a simpler process than sexual reproduction.

Know more about Bacteria: https://brainly.com/question/6941760

Water has a boiling point of 100 degrees Celsius, a melting point of 0 degrees Celsius, and a density of 1 g/cm. What is this a list of?

1. unimportant details

2. chemical properties

3. incorrect facts

4. physical properties

Answers

Answer:

Chemical properties

Explanation:

Water has a boiling point of 100°C or 373 KWater has melting point of 0°C or more exactly 273.16KThe density of water at 4°C is 1000kg/m^3

The answer is 1. Unimportant details

how did alexa canadys accomplishment impact the general public

Answers

Answer:

She was the first female African American to be certified by the American Board of Neurological Surgery.

Explanation:

She became the first female African American can to be certified.

Answer: Alexa Canady was the first female African-American neurosurgeon in the United States when she graduated from medical school in 1981. Alexa Canady is the first African-American woman to receive certification from the American Board of Neurological Surgery.

Has negative values

Group of answer choices

Celsius and Fahrenheit

Celsius and Kelvin

Fahrenheit and Kelvin

Answers

Answer:

Explanation:

Celsius and Fahrenheit

They have negative values but not Kelvin as its lowest is O Degree Kelvin.

Hope this helps!

BRAINLIEST ME PLS!!!

KNO₃ number of atoms

Answers

Answer:

Explanation:

Heavy atom count:5

Formal Charge:0

Complexity: 18.8

Isotope Atom count: 0

hope this helps:))

Answer:

There are 5 atoms in KNO3

pls help me no links

Answers

Answer:

mixture

Explanation:

If I remember correctly it should be mixture

Is there a relationship between CO2 levels rising and heavy precipitation? If so, what is it?

Answers

Answer:

Explanation:

Yes, there is a relationship between rising CO2 levels and heavy precipitation. As the concentration of CO2 in the atmosphere increases, it leads to a warming of the Earth's surface due to the greenhouse effect. This warming, in turn, causes an increase in the rate of evaporation of water from the Earth's surface, including from the oceans, lakes, and rivers.

This increased evaporation results in more water vapor in the atmosphere, which can lead to heavier precipitation events, including more frequent and intense rainstorms, snowstorms, and other forms of precipitation. This is because warmer air can hold more moisture, making it more likely to produce heavy rainfall.

In addition, the warming of the Earth's surface can also lead to changes in atmospheric circulation patterns, which can further increase the likelihood of heavy precipitation events in some regions.

Overall, the relationship between rising CO2 levels and heavy precipitation is complex and can vary depending on the specific location and other environmental factors. However, there is evidence to suggest that as global temperatures continue to rise due to rising CO2 levels, heavy precipitation events are likely to become more frequent and intense in many parts of the world.

Answer: Yes there is a direct relationship between CO2 and heavy precipitation. Rising in CO2 means increasing the temperature in the atmosphere which causes more water vapor evaporates into the atmosphere and which causes high rainfall or precipitation.

Explanation: Increased atmospheric CO2 levels are causing plant stomata to close, allowing plants to hold more water in their stems, reducing transpiration, and possibly impacting tropical rainfall patterns in varying ways depending on region.

Hiya! I need some help- This is about climate!
Make a claim about how the sun’s energy affects the climate of an area. Provide evidence with factors supporting your claim. Explain your reasoning.

Answers

Answer:

The sun's energy creates climate change in every area like in Australia the sun's energy caused all the fire's in Australia.

Explanation:

Our climate is also strongly affected by the amount of solar radiation received at Earth too!

CO2(g) + NH3(g) + H2O(l) → NH4HCO3(s) witch type of reaction plzz within 1 hour

Answers

combination reaction

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