Questions in Chemistry

What is an example of a physical model in science

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Give an example of a physical model, and explain one limitation of the model. Then give an example of a mathematical model, and explain one limitation.

What is the original source of energy in an ecosystem

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What is the original source of the energy that flows through most ecosystems? What would happen without this source?

What do elements in the same group have in common

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What do elements in a group on the periodic table have in common?

How does the rate of formation of o2 compared with

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Given the following balanced equation, determine the rate of reaction with respect to [O2]. If the rate of formation of O2 is 7.78 x 10-1 M/s, what is the rate …

How to learn 1 to 20 elements of periodic table

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How to remember the first 20 elements of the periodic table?

What is the role of cytoplasm in a living cell

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What is the role of cytoplasm in a living cell? A fight infections B. digest proteins C. surround organelles D. pass on genetic information

In the periodic table the elements are arranged in ________

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In the modern periodic table, elements are arranged in order based on the number of in the nuclei of their atoms.

What is the molar mass of copper ii sulfate cuso4

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An aqueous solution is 15.0% by mass of copper(II) sulfate pentahydrate, CuSO4∙5H2O.What is the molarity of CuSO4 in this solution at 20°C?The density of this solution at 20°C is1.167g/mL(molecular weight …

How does an instant cold pack get cold so quickly

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Please help urgent !!! How does an instant cold pack get cold so quickly?

Identify the influence of mass and distance on gravitational forces

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What 2 factors determine gravitational force? Total Mass Weight Gravity Distance

What are common signs that a chemical reaction has occurred

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Identify common signs that a chemical reaction has occurred

Write an equation for the neutralization of h2so4 by koh

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(a) Write the balanced neutralization reaction that occurs between H2SO4 and KOH in aqueous solution. Phases are optional. (b) Suppose 0.750 L of 0.480 M H2SO4 is mixed with 0.700 …

What is the final electron acceptor in aerobic cellular respiration

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Identify the source of the electrons that travel down the electron transport chain. explain why oxygen is the final electron acceptor in aerobic cellular respiration.

Chemical reactions occur when atoms are separated joined or rearranged

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According to Dalton's atomic theory, elements are composed of tiny particles called ___ .Atoms of each element are ___ from the Atoms of all other elements. Atoms of different elements …

What are the charges of each of the subatomic particles

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Describe the charges of the subatomic particles by choosing the answer from the drop-down menu. Proton have a charge. Have a 0 charge. Electrons have a charge.

How do you make a bohr model of an atom

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Create an atom diagram using the Bohr model. Directions Choose three elements from the following list. Use a periodic table to determine the number of protons, neutrons, and electrons. Draw …

How many protons and electrons does a neutral atom have

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A neutral atom has 37 electrons. How many protons does the atom have?

What is a light year and what does it measure

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A light year measure the distance a lightbeam can travel in one year one light year is equivalent to 9500000000000 km why do scientist use light years to measure distances …

Factors that affect the strength of electric and magnetic forces

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What produces and affects the strength of a magnetic field

Why must the stopper be removed from the separatory funnel

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Select the statement that is NOT true about venting during an extraction. A.The separatory funnel stem should not be pointed towards any person while venting. B. The stopper must be …

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