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Chemistry

A rope experiences three 400 N forces to the left and three different 410 N forces to the right. (A) Will accelerate to the left (B) Will accelerate to the right (C) Will not accelerate

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Donovan Fernandez

Chemistry

An ionic bond involves the transfer of what? *

Olons

Protons

Electrons

Neutrons

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Chemistry

During an Experiment a scientist notes that a sample turned red.

which kind of data did the scientist record

A. average data

B. quantitative data

C. measured data

D. qualitative data

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Chemistry

Why is chemistry important for the study of living things

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Chemistry

How much does radon cost per gram

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Chemistry

What is wrong with rutherford's model of the atom

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Chemistry

What do the numbers listed for an element on the periodic table represent?

The smaller number is the number of protons, and the greater number is the mass.

The smaller number is the number of neutrons, and the greater number is the number of protons.

The smaller number is the mass, and the greater number is the number of protons and electrons.

The smaller number is the number of protons, and the greater number is the number of neutrons.

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Chemistry

Helium (He), oxygen (O), carbon (C) fluorine (F), and chlorine (Cl) are all nonmetals. Using the periodic table, which pair of nonmetals do you predict has the most similar properties, and why? Oxygen and chlorine, because they are both alkalis Helium and carbon, because they are both noble gases Oxygen and fluorine, because they are in the same period Fluorine and chlorine, because they are both halogens

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Chemistry

Calculate the volume of a 1.25 M solution of HCN made from 31 grams of HCN

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Chemistry

How to find the valency of a polyatomic ion?

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Chemistry

Which of the following is true in regard to a charged atom?

A. The number of protons and the number of electrons within the same atom are unequal.

B. When an atom gains an electron, it becomes a cation, which is positively charged.

C. When an atom loses an electron, it becomes an anion, which is negatively charged.

D. The magnitude of the negative charge is equal to the magnitude of the positive charge.

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Chemistry

What is cycloalkane?

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Chemistry

Consider the following compounds and suppose that 0.5 M solutions are prepared of each: NaI, KF, (NH4) Br, KF, KCN, KC2H3O2, CsNO3, and KBr. Which will have solutions that are (a) acidic, (b) basic, and (c) neutral

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Chemistry

Which best explains why infrared waves are ineffective for treating cancer?

a) They have frequencies that are too high to kill cancer cells.

b) They have short wavelengths, which can be harmful to healthy cells.

c) They do not transfer enough energy to destroy cancer cells.

d) They have long wavelengths, which can be harmful to healthy cells.

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Chemistry

5.00 g of an unknown compound was dissolved in 250.0 mL of water. The unknown compound was found to be a non-electrolyte and the osmotic pressure of the solution was determined to 14.5 atm at 298 K. Calculate the molar mass of the unknown compound (in units of g/mol). R = 0.08206 (L atm) / (mol K)

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