Chemistry » Page 94

Chemistry

Carlee Larsen

8) Rubidium [Kr]5s has an atomic radius of 248pm. Tin, another period 5 element, has an

atomic radius of 140pm.

What would the correct atomic radius for xenon be? Xenon is also in Period 5 and a noble gas.

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Chemistry

Elvis Patterson

A 2.7 M solution contains

0 2.7 moles of solute per 1000 g of solvent.

2.7 moles of solute per 1000 mL of solution.

0 2.7 grams of solute per 100 mL of solution.

0 2.7 grams of solute 100 g of solution.

per

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Chemistry

Rowan Newman

What is the molar concentration of Cu2 + in a solution that is labelled 5 ppm Cu2+? a) 7.9x10^ (-5) M b) 7.9x10^ (-6) M c) 5.1x10^ (-6) M d) 5.5x10^ (-4) M

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Chemistry

Guest

Drag each tile to the correct box.

A student writes down several steps of the scientific method. Put the steps in the best order.

Analyze the experimental data.

Make a hypothesis.

Conduct an experiment.

Communicate the results.

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Chemistry

Amiyah Myers

What is a glass rod used for in chemistry and biology laboratory?

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Chemistry

Jazlene Fry

The same amount of heat is removed from 2kg of water and from 1kg of water starting at the same temperature. What happen?

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Chemistry

Kale Gonzalez

When heated a sample consisting of only CaCO3 and MgCO3 yields a mixture of CaO and Mgo. If the weight of the combined oxides is equal to 51.00% of the initial sample weight, calculate the per cent of CaCO3 and MgCO3 in the sample. (12 M.)

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Chemistry

Sage Kane

Why does pumice float

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Chemistry

Belen Davila

At STP, 4 liters of O2 contains the same total number of molecules as

(1) 1 L of NH3 (3) 8 L of He

(2) 2 L of Cl2 (4) 4 L of CO2

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Chemistry

Karly Barajas

When the pressure that a gas exerts on a sealed container changed from 32.6 psi to ___ psi, the temperature changes from 735 k to 1035 k?

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Chemistry

Stevens

Which statement explains why large atoms are more reactive than small atoms?

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Chemistry

Cassandra Kelley

Sodium hydroxide + nitrate acid

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Chemistry

Jakayla Wood

Write a mathematical equation showing that pressure (P) multiplied by volume (V) remains equal to a constant (k).

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Chemistry

Dustin Mays

A balloon originally has 0.10 moles of helium and has a volume of 0.50 L. If 0.59 grams of He are added to the balloon, what will the new volume be?

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Chemistry

Jaime Ballard

What is the mass of N2 in a 56 liter container at STP?

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