Chemistry » Page 46

Chemistry

Jett Moody

How many chromosomes would be in a sex cell of a Syrian hamster

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Chemistry

Livia Waller

if you pull a Tomac radius versus First ionisation Energy would the graph reveal a direct or inverse relationship

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Chemistry

Jerome Roach

Which of the following bonds is the most polar in nature:

(1) Cl2

(2) HCl

(3) HBr

(4) HI

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Chemistry

Tripp

Combustion analysis of a 13.42-g sample of the unknown organic compound (which contains only carbon, hydrogen, and oxygen) produced 36.86g CO2 and 10.06g H2O. The molar mass of estriol is 288.38g/mol.

Find the molecular formula of the unknown compound

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Chemistry

Foster

What concept in Dalton's atomic theory has been modified?

A. All matter is composed of atoms.

B. Atoms of different elements have different properties and masses.

C. Atoms can combine in chemical reactions.

D. Atoms cannot be divided.

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Chemistry

Hugh Weiss

Which particles in an atom can increase or decrease in number without changing the identify of the elements?

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Chemistry

Turner Blair

Which process best describes the cause of lightning

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Chemistry

Carlie Mccormick

Which formula can be used to express the law of conservation of momentum, where p = momentum? pi = pf pi > pf pi < pf pi ≠ pf

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Chemistry

Liam Mclean

What is sound energy? Give two examples.

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Chemistry

Leon Davila

Which of the following are examples of plasmas?

ice cubes

tails of comets

a gas fire

the ionosphere

a neon sign

a flashlight

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Chemistry

Izabelle Wagner

How much sugar will dissolve in 1000 g of water at 80°c?

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Chemistry

Lydia Osborne

The order of elements in the periodic table is based on

a. the number of protons in the nucleus.

c. the number of neutrons in the nucleus.

b. the electric charge of the nucleus.

d. atomic mass.

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Chemistry

Selah

A calorie is the amount of energy needed to rise the temperature of 1g of water 1°c. true or false

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Chemistry

Guest

The discovery of the atomic nucleus, or perhaps better stated the development of theory of the nucleus, is credited to Ernest Rutherford in 1911. He was a kiwi physicist who worked in the laboratory of JJ. Tomson, who developed the earlier Plum Pudding model of the atom. A few years earlier, in 1904, Japanese physicist Hantaro Nagaoka postulated the saturnian model of the atom where he envisioned a very heavy positively charged center of the atom with electrons orbiting much like the rings of Saturn. What are the similarities and differences between the Nagaoka and Rutherford models of the atom? If he developed his theory about 7 years earlier than Rutherford, why is Nagaoka not credited with the discovery of the nucleus? Hint: what's a nucleus anyways

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Chemistry

Zachery Coffey

Atomic emission spectra are unique to each element. true false

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