Is this correct?? please help​

Answer:

Mass of oxygen required = 19.5 moles × 16 g/mol = 312 g.

Explanation:

Answer:

[tex]3.40x10^{24}[/tex] molecules

Explanation:

[tex]\frac{5.65mol}{1} *\frac{6.02*10^{23}mlx }{1 mol}=3.4013x10^{24} mlx[/tex]

btw mlx stands for molecules and i put the answer in correct sig figs in case your teacher is like mine and wants answers in correct significant figures

Answer:

I think this is the right answer, I researched this. I am not sure if this is the right answer.

Lava flows rarely kill people because they move slowly enough for people to get out of their way. If magma is thick and sticky, gases cannot escape easily. Pressure builds up until the gases escape violently and explode. ... Explosive volcanic eruptions can be dangerous and deadly.

Explanation:

Answer:

             27.025 g of H₂O

Explanation:

The Balance chemical equation is

                                   2 H₂ + O₂ = 2 H₂O

Step 1: Calculate Limiting Reagent

Moles of H₂

                        Mole = 16 g / 2.02 g/mol = 7.937 mol

Moles of O₂

                        Mole = 24 g / 32.00 g/mol = 0.750 mol

Mole ratio of H₂ : O₂ is 2 : 1. Hence, 7.937 mol of H₂ will need 3.9685 mol of O₂. This means O₂ is limiting reagent.

Step 2: Calculate Moles of H₂O

0.750 mol of O₂ will produce 1.50 mol of H₂O because the mole ratio of O₂ : H₂O is 1 : 2.

Step 3: Calculate mass of H₂O

                          Mass = 1.50 mol × 18.02 g/mol = 27.025 g of H₂O

Answer:

5 simple characteristics of bacteria-

Single-Celled.

Absent Organelles.

Plasma Membrane.

Cell Walls.

DNA.

Explanation:

Answer:

Here is your answer

Explanation:

Please mark me brainliest

Answer:

Forest fire

Explanation:

Mark me as brainliest

Environmental change that is considered short term is forest fire.

Short-term environmental change is the environmental change that occurs quickly and affects organisms. Forest fires are an example of a short- term environmental change.

Short-term changes include changes in seasonal patterns, unseasonal rainfall, changes in the life cycle of insects and animals, and so on. Long term changes examples are melting of glaciers or a rise in levels of water bodies which may cover islands close to sea level.

El Niño and La Niña are two examples of short-term climate changes lasting one to a few years. In an El Niño, the trade winds reverse direction, as do the equatorial surface currents. This causes warm water to pool off of South America and stop upwelling. A La Niña is like normal conditions only more so.

Therefore, Environmental change that is considered short term is forest fire.

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Answer:

natural selection

Explanation:

The process that results in changes to the genetic material of a population over time

Answer:

Answer:

I believe its an NH4^+ ion & an NO3^- ion

Explanation:

hope this helps!

Answer:

prepare

Assemble a disaster supply kit.

Locate safe places in your home for each type of disaster.

Determine the best evacuation routes from your home.

Become trained in first aid and CPR.

Show each family member how and where to shut off utilities (water, gas, electricity).

Explanation:

Answer:

An important example of chemical potential energy is the energy stored in the food that you eat. Inside your body, this food is distributed around your body and is reacted in your cells to release the energy stored in the chemical bonds.

Explanation:

Answer:

1.18 atm

Explanation:

We need to use the Ideal Gal Law for this question:

 PV = nRT, where P is the pressure, V the volume, n the moles, R the gas constant, and T the temperature in Kelvins.

I'll choose a gas constant that has units compatible with the given conditions:

 R = 0.08206 (L*atm)/(K*mol)

P = (8.5 moles)*(0.08206 (L*atm)/(K*mol))*(365.1K)

Make sure all the units cancel except atmospheres.

P = 1.18 atm

If the chemist has 35.0 g of Na, then 26.94 grams of chlorine is required to react completely with the sodium.

Number of moles of any substance can be calculated as [tex]${\rm{n = }}\frac{{\rm{W}}}{{\rm{M}}}$[/tex].

Where, W = given mass

M = molar mass

Balanced equation for the formation of NaCl can be written as:

[tex]${\rm{2N}}{{\rm{a}}_{{\rm{(s)}}}}{\rm{ + C}}{{\rm{l}}_{\rm{2}}}_{{\rm{(g)}}} \to {\rm{2NaC}}{{\rm{l}}_{{\rm{(s)}}}}$[/tex]

Here the ration of Na and Cl is 2:1.

No. of moles of Na = 35/23 = 1.52 mole

If 2 moles of Na is consumed by 1 mole of Cl, then 1 mole of Na is consumed by half mole of Cl.

Mole of Cl required to consume 1 mole of Na = 1.52/2 = 0.760 mole.

Now used mass of Cl can be find out by using the formula of moles as follow:

W = 35.45 × 0.760 = 26.94 grams

Hence, 26.94 grams of Cl is required to completely react with 35.0 grams of Na.

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Answer:

54

Explanation:

trust me its what it told me the expert verified confusing

Answer:

An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.

Explanation:

Answer:

293°C

Explanation:

20°C+273=293°C

Answer:

answer=217.047pa

Explanation:

we apply the Gay Lussac's law "at constant volume the pressure of a fixed mass of a gas is directly proportional to kelvin temperature"

p1/t1=p2/t2

hence we can modify the equation

p2=t2*p1/t1

=210*308/298

=217.047pa

The menstrual cycle is regulated by hormones. Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone.

Carbon atoms is made up of a nucleus of neutrons and six protons which is surrounded by six electrons.

This refers to a chemical element which has an atomic number of 6 and is denoted as C. It is the major constituent of all organic substances which are present in nature.

Examples include carbohydrate, hydrocarbons etc and usually acts as the central atom in reactions.

It is made up of  neutrons, six protons and six electrons thereby making it the most appropriate choice.

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Answer:

i guess answer is 0.0600

Explanation:

Here,

Density=0.791g/cm^3

Volume=75.89ml

So,

Mass=Density*Volume

=0.791g/cm^3×75.89ml

=60.02g/cm^3.ml

Expressing them in kg

60.02/1000

=0.0600 kg

Answer:

➢ There are eight lone pairs of electrons in each of the three resonance structures of NO3- ion. These eight lone pairs are provides by three oxygen atoms. There are no lone pairs on nitrogen atom.

[tex]Into \: your Arms[/tex]

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Yeast is a substance which contributes to beer brewing by producing ethanol during alcohol fermentation.

This a process in which  carbohydrate is converted into an acid or alcohol. A common fungus used by brewing companies in fermentation processes is referred to as Yeast.

It converts Sugar to the following products:

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Answer:

Polystyrene and plastic foam are both used as insulators as they have small air bubbles trapped inside them. This makes them very good insulators because heat energy can't flow through them

Explanation:

The first law of thermodynamics characterises the two types of energy transfer, as heat and as thermodynamic. The final internal (thermal) energy of the system is 1,500 J.

The energy present in a system itself for conducting reactions is called internal energy.

Given,

According to the first law of thermodynamics:

[tex]\rm Q = \Delta U + W[/tex]

Substituting values in the above equation:

[tex]\begin{aligned}\rm Q &= \rm U_{2} - U_{1} + W\\\\\rm U_{2} &= \rm Q - W + U_{1}\\\\\rm U_{2} &= 700 - 400 + 1200\\\\&= 1500 \;\rm J\end{aligned}[/tex]

Therefore, option D. 1500 J is the final energy.

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Answer: The answer would be: 1500 J

Explanation:

took the quiz

Answer:

Calcium has an Atomic number of 20 and Atomic mass of 40.078 u

Hope this helps!

In this experiment, errors may be due to the presence of impurities of the splashing of solutions used in the laboratory analysis.

Experiments are often used by scientists to determine cause and effect relationships. These experiments are often not free from errors. These errors affect the quality of the results from the experiments.

In this experiment, errors may be due to the presence of impurities of the splashing of solutions used in the laboratory analysis.

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