Chemistry » Page 89

Chemistry

Sydney Wallace

What is a pencil made of

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Chemistry

Sierra Cline

How do convection currents cause the motion of tectonic plate

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Chemistry

Norah Montoya

A sample of matter must be copper if (1) each atom in the sample has 29 protons

(2) atoms in the sample react with oxygen

(3) the sample melts at 1768 K

(4) the sample can conduct electricity

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Chemistry

Lane Stein

Which solutions, acid or alkalis, Turns fat into soap

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Chemistry

Talia Ruiz

Why is it important to keep the fractures propped open?

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Chemistry

Chloe Obrien

1. The mass of a proton is approximately equal to the mass of

A) an alpha particle C) a positron

B) a beta particle D) a neutron

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Chemistry

Mckenna

How many neutrons does an element have if its atomic number is 45 and its mass number is 160?

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Chemistry

Briley Williams

What is the H + in solution with pH of 10.9

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Chemistry

Michelle

Determine the hydrogen ion concentration of. 650 M aqueous solution of NaOH. the ionization product constant for water, Kw, is 1.00*10^-14

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Chemistry

Kailey Lowery

The protons and neutronsA. leave the nucleus often. B. never leave the nucleus. C. spend all their time outside the nucleus.

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Chemistry

Morgan

Rocks formed by changes in heat and pressure or the presence of hot

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Chemistry

Dale

Both equation I and II are balanced, but equation II is the correct way to write the balanced equation. Why do you think this is? (Hint: Think fractions.)

I) 2 SnO2 + 4 H2 → 2 Sn + 4 H2O

II) SnO2 + 2 H2 → Sn + 2 H2O

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Chemistry

Blaze Terry

What technology did mackinnon use to discover the structure of the potassium ion channel?

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Chemistry

Marley Zuniga

Both equations I and II are balanced, but equation I is the correct way to write the balanced equation.

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Chemistry

Ireland Berry

Which of the following energy sources are in some way divided from the sun (select all that apply)

A. Geothermal

B. Nuclear

C. Wave

D. Biomass

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