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3 years ago

This group of elements contains brittle solids at room temperature. They

Chemistry

1 answer:

Natalija [7]3 years ago

5 0

non-metals

they don't conduct heat

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How many molecules are there in 5H20?

Svetach [21]

Answer:

The number before any molecular formula applies to the entire formula. So here you have five molecules of water with two hydrogen atoms and one oxygen atom per molecule. Thus you have ten hydrogen atoms and five oxygen atoms in total.

3 0

3 years ago

Read 2 more answers

Group 18 noble gases are relatively inert because *

choli [55]

Answer:I believe its A. There noble gasses so there happy with there electron count!

Explanation:

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4 years ago

What mass in grams of fructose is contained in 325 mL of a 1.5 M fructose solution

STALIN [3.7K]

87.75 g of fructose

Explanation:

molar concentration = number of moles / volume (L)

number of moles = molar concentration × volume

number of moles of fructose = 1.5 × 0.325

number of moles of fructose = 0.4875 moles

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of fructose = 0.4875 × 180

mass of fructose = 87.75 g

Learn more about:

molar concentration

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3 years ago

A student hypothesizes that water from infrequently used school faucets contains more chemical impurities than the water from fr

Sauron [17]

The different school faucets (frequently and infrequently used) are the manipulated or independent variable. The exact school faucet being tested is chosen (in a sense, manipulated) to test a particular effect or in this case, the presence of <span>more chemical impurities.</span>

6 0

3 years ago

Determine the mass of 1 mol of gold (Au), of aluminum chloride (AlCl3), and of glucose (C6H12O6)

sleet_krkn [62]

Answer: Mass of 1 mol of gold (Au) is 197g , of aluminum chloride $(AlCl_3)$ is 133.5 g and of glucose $(C_6H_{12}O_6)$ is 180 g

Explanation: Mass of 1 mole of a substance is called its molar mass.

a) 1 mole of $Au$ contains $6.023\times 10^{23}atoms$ and weigh 197g.

b) 1 mole of $AlCl_3$ will weigh= $1\times {\text {mass of 1 mole of Aluminium}}+3\times {\text {mass of 1 mole of chlorine atom}}$

Thus mass of 1 mole of $AlCl_3$ will be $=1moles\times {27g/mol}+3moles\times {35.5g/mol}=133.5g$

c) 1 mole of $C_6H_{12}O_6$ will weigh= $6\times {\text {mass of 1 mole of carbon}}+12\times {\text {mass of 1 mole of hydrogen atom}}+6\times {\text {mass of 1 mole of oxygen}}$

1 mole of $C_6H_{12}O_6$ will weigh= $6\times 12g/mol+12\times 1g/mol+6\times 16g/mol=180g$

5 0

4 years ago