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alexandr402 [8]
3 years ago
10

Which metals have similar chemical properties? Check all that apply. barium beryllium rubidium radium titanium calcium platinum

Chemistry
2 answers:
forsale [732]3 years ago
6 0

beryllium & calcium are the two in the same column or family

Pie3 years ago
3 0

answer: is the

first

second

forth

6

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Pressure is inversely related to?
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Pressure is inversely related to temperature
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The molecular weight of a gas that has a density of 5.75 g/l at stp is __________ g/mol.
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Answer : The molecular weight of a gas is, 128.9 g/mole

Explanation : Given,

Density of a gas = 5.75 g/L

First we have to calculate the moles of gas.

At STP,

As, 22.4 liter volume of gas present in 1 mole of gas

So, 1 liter volume of gas present in \frac{1}{22.4}=0.0446 mole of gas

Now we have to calculate the molecular weight of a gas.

Formula used :

\text{Moles of gas}=\frac{\text{Mass of a gas}}{\text{Molecular weight of a gas}}

Now put all the given values in this formula, we get the molecular weight of a gas.

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Therefore, the molecular weight of a gas is, 128.9 g/mole

8 0
3 years ago
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A student mixes chemicals A and B together and records the amount of time it takes for a color change to occur. The student repe
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Answer:

It is mentioned that the student is mixing chemicals A and B and observes the time taken for the color to change. However, in the experiment, it is noticed that the student has repeated the procedure five times and each time he or she is modifying the concentration of chemical B. Thus, it is clear that the concentration of chemical B is the independent variable in the experiment. An independent variable is illustrated as the variable, which is controlled or modified in the experiment.

8 0
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A sample of nitrogen gas has a mass of 48.6 grams. How many N2 molecules are there in the sample? molecules Submit Answer &
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Answer:

There are 1.05  x 10²⁴ molecules in 48.6 g N₂

Explanation:

1 mol of N₂ has a mass of (14 g * 2) 28 g.

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Since there are 6.022 x 10²³ molecules in 1 mol N₂, there will be

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Explain how to determine the number of neutrons an
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To find the neutrons you add the mass number and the atomic number for neutrons


Hope this helps


-Zayn Malik
5 0
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