help me- i hate science sm-

Answer:

carbon dioxide is produced.

CO2 is the chemical formula.

Answer:

ummmmmmmmmmmmmmmmmmmm

Answer:

Before submerged 150ml

After submerged: 180ml

rock volume: \(180 - 150 = 30\)

formula for density:

\( \frac{mass}{volume} = 5.38 \)

\( \frac{175}{30} = 5.38 \)

THE ANSWER IS b

prettty sure this is wrong but eh :/ probably correct

Answer: The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment. Each section of a lab report has its own purpose. 1. Title: expresses the topic of your study 2. Abstract: summarizes your research aims, methods, results, and conclusions

Explanation:

Answer:

39

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.

Molecular nitrogen (N2) is a chemical element whose structure is composed of

two nitrogen atoms which are tightly bound together

An element is a substance which cannot be split into simpler units by an ordinary chemical process.

Below are some examples of elements:

So therefore, molecular nitrogen (N2) is a chemical element whose structure is composed of two nitrogen atoms which are tightly bound together

Complete question:

What is the structure of the chemical element nitrogen?

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It is important to know the affects of temperature on pressure and thereby on winds.  At high temperature, the pressure will be high and thus, the winds will pass from that area.

What is winds?

Wind is the passage of air through the atmosphere. The uneven distribution of temperature leads to the difference in pressure. The pressure gradient results in wind.

Air pass from  high pressure area to low pressure area. According to Gay- Lussacs law, at the pressure gases is directly proportional to the temperature.

Hence, as the temperature increases, pressure in that area increases, leads to air currents to the opposite direction. This will definitely affects harnessing.

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Answer:

The answer is product

Explanation:

Hope this helped Mark BRAINLEST!!!

The total mass of products obtained in the reaction; CaCO3→CO2​+CaO is  30 grams. Given the reaction; Fe+O2→Fe2O3​, atoms of Fe and O2 are rearranged during the reaction. During a chemical reaction, mass is conserved. Given the reaction NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2, we can see that the atoms of the reactants are regrouped during the reaction.  Given the reaction 2H2+O2→2H2O, there are four atoms of hydrogen before and after the reaction.

According to the law of conservation of mass, atoms are neither created nor destroyed in a chemical reaction. Similarly, mass is neither created nor destroyed.  

This means that the number of atoms of each element before and after the reaction must remain the same. A chemical reaction only involves the rearrangement of atoms in reactants to form products.

The total mass of reactants must be equal to the total mass of products according to the law of conservation of mass.

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Answer:

C

Explanation:

Thermal produces heat that is all around us even in ice because all matter contain heat enegry.

Answer:

1 2 3 it's because yes nnnnnn

the answer is solid line

Answer:

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Reactants are the starting materials, while products are the end result of the reaction. All chemical reactions are accompanied by a change in entropy.

In general, chemical reactions can be classified as either redox reactions or non-redox reactions. In redox reactions, there is a transfer of electrons between reactants. In non-redox reactions, there is no electron transfer. All exothermic reactions are redox reactions, while endothermic reactions may be either redox or non-redox.

Explanation:

Hope this helps!

Answer: A

Explanation:

The spot labelled as'A' in the image will turn into extrusive igneous rocks.

Igneous rocks are one of the three main rock types the other two including sedimentary and metamorphic rocks.These rocks are formed by cooling and solidification of lava or magma.

The magma is derived from partial melts in the planet's mantle or crust.Melting is caused by increase in temperature or decrease in pressure or even change in composition.Solidification occurs either below surface which is called as intrusive rocks or on the surface as extrusive rocks.

They are classified according to their texture,mode of occurrence,chemical composition,geometry and mineralogy of rock.The two important variables for classification are mineral composition and cooling history.

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Answer:

b. high to low.

heat dissipates, spreads out.

The transfer of heat takes place from the region of high temperature to the region of low temperature.

It is a mechanism or phenomenon, which convey entropy and energy from one location to another. In order to attain thermodynamic equilibrium, the transferring of heat takes place from the warmer object to the cooler object.

The transferring of heat always takes place from the object at the higher temperature to the object with the lower temperature. The heat transfer in case of a gas is associated with a change in temperature.

Thus, the correct answer is option B, that is, high to low.

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Answer:

its A

Explanation:

If a 3.0 (pg) sample of curium-245 has a half-life of 8500 years, then the conclusion which can be drawn is the curium-245 sample will have a mass of about 1.5 pg after 8500 years

Half life time is that time after which initial concentration of reactant becomes half of the initial.

Given that initial concentration of curium-245 = 3pg

After half life time concentration of curium-245 = 1.5pg

Hence, the curium-245 sample will have a mass of about 1.5 pg after 8500 years is the conclusion.

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Answer:

The acid in the soil

Explanation:

The more acid the bluer in terms of hydrangea flowers if there was a balance between the two it will be half and half of the two colors.

Answer:

Since the hydrangeas are changing color depending on whether the soil is acidic or basic, they must have an indicator. This means that any hydrangea planted in acidic soil will have blue flowers and any hydrangea planted in basic soil will have pink. One common indicator present in many plants is anthocyanin, so maybe hydrangeas contain that chemical.

Explanation:

I took the test

Answer:

orange made up from methyl

Answer: a carboxylic acid and an amine

Explanation: just took the test

Four atoms—Carbon (C), Oxygen (O), Hydrogen (H), and Nitrogen (N)—make up the molecule in question. Alkyl halides and carboxylic acids are two functional groups that may be distinguished from the molecule's structure.

A halogen atom (such a chlorine, bromine, or iodine atom) is joined to a carbon atom to form the functional group known as an alkyl halide. The C is joined to a R group, which is another name for a carbon-based group, in this molecule.

This shows that it is an alkyl halide since the C is joined to a halogen atom. A functional group called a carboxylic acid is made up of an oxygen atom and a hydrogen atom that are double-bonded to a carbon atom.

This molecule has Given that the two oxygen atoms are connected to the carbon atom and the hydrogen atom is bound to the oxygen atom, the chemical formula C O O H denotes a carboxylic acid.

The molecule in issue therefore comprises an alkyl halide as well as a carboxylic acid. No amine and ester, no aldehyde and carboxylic acid, and no amine and alcohol are present.  

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Answer: the answer is b or c

Explanation:

I took it

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

Answer:

D

Explanation:

From my experience this is what happens when I put sugar in warm water glass

Deanna stirred a teaspoon of sugar into a glass of warm water. The sugar completely dissolved in the water. The statement that is true about the dissolved sugar is the sugar forms a mixture with the water. Therefore, option D is correct.

The term solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specified temperature.

Temperature, pressure, polarity, and molecular size are all factors that influence solubility. For most solids dissolved in liquid water, solubility increases with temperature. This is due to increased vibration or kinetic energy of the solute molecules at higher temperatures.

Water is known as the "universal solvent" because it dissolves more substances than any other liquid. This is critical for all living things on the planet.

Thus, the dissolved sugar is the sugar forms a mixture with the water, option D is correct.

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Answer:b

Explanation:

Answer:

hold on i will help you soon

The period of time when sexual intercourse takes place between two organisms is called mating. However, all the matings need not end in fertilization.

The gestation period is a time when the embryo develops completely into a fetus. This is usually from the time of fertilization to the time of giving birth.

Let us take the comparison of the gestation period of 3 mammals.

The gestation period of a cow varies from 279- 287 days. The mating between the bull and cow occurs during the heat or oestrus period of the cow. At that time the bull mounts on the cow or vice-versa may happen during the mating period. This is termed bulling.

In the case of horses, the gestation period is 320-380days. The mating ritual in a horse is a bit different than in a cow. It usually has three phases of sexual behavior which includes: courtship, mating, and post mating behavior. During courtship, the stallion which is the male horse will approach the mare, prance, sniff her, nuzzle her, and groom her. The mare which is the female horse may squeal, kick, or move away to show the stallion that she is not ready. When the mare is receptive to breeding, she may stand still, deviate her tail, and urinate, leading the stallion to mount her. It usually breeds well in pastures than in controlled environmental breeding conditions.

Whereas in camels, the gestation period is far longer than in cows and horses. It is about 360-440days. The male camel displays its organ called a dulla to show out is ready for mating. The male camel Urinates on its own tail and swishes it over its back so that the Urine contains female-attracting pheromones. It shows distinct violent behavior towards other male camels. The female camel undergoes an estrous cycle in the breeding season which lasts receptive for 3-4 days, and non-receptive following the other 10 days. In the receptive period, the camel sits down and exposes its genitalia for the male camel to copulate. The whole mating takes about 20 minutes and is accompanied by gurgling and frothing by the male and bleating by the females.

It should be noted that African elephants have longer gestation periods like Asian elephants whereas no other animal has a longer gestation period than an elephant or a shorter gestation period than mice.

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