Chemistry » Page 52

Lyla Valenzuela

Chemistry

Oil, which is built from the nonmetals hydrogen, carbon, and oxygen:

A) Ionic

B) Covalent

C) Unsure

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Chemistry

The positively charged particle in the nucleus of an atom is the

1. neutron

2. magnetron

3. electron

4. proton

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Chemistry

You have 180g of a radioactive substance. it has a half-life of 265 years answer

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Chemistry

Which energy level has the least energy

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Chemistry

Ricardo wants to determine the length of a strip of zinc metal. What is the SI unit for length? foot inch liter meter

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Chemistry

If you took an empty balloon, weight it on a scale then filled the balloon up with air and weighed it again would you expect the weight of the balloon to change?

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Chemistry

Which of the following statments is true for gas particles? they move freely and combine with each other.

they dont move at all

they move slowly and in a structured pattern

they are constantly in motion and changing position.

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Chemistry

The A-36 steel pipe has a 6061-T6 aluminum core. It is subjected to a tensile force of 200 kN. Determine the average normal stress in the aluminum and the steel due to this loading. The pipe has an outer diameter of 80 mm and an inner diameter of 70 mm.

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Chemistry

How many atoms are in 3.3 moles of copper atoms?

A. 1.9 x 10 atoms

B. 2.0 x 10^23 atoms

C. 2.0 x 10^24 atoms

D. 2.0 x 10^-23 atoms

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Chemistry

What is the Bronsted-Lowry definition of a base?

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Duncan Espinoza

Chemistry

Which pair must represent atoms of the same element?

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Chemistry

Which statement is true of any chemical reaction a. the mass of the reactants is always greater than the mass of the products b. the mass of the products is always greater than the mass of the reactants c. there is no relationship between the mass of the reactants and products d. the mass of the reactants equals the mass of the products

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Chemistry

For the reaction: 2H2O → 2H2 + O2, what is the total number of moles of O2 produced from the complete decomposition of 8 moles H2O?

A) 2 moles

B) 3 moles

C) 4 moles

D) 8 moles

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Chemistry

What must be true about all of the planets sandwich you weigh less than here on earth

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Chemistry

What is the difference between conduction convection and radiation

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