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3 years ago

ASAP will give brainliest!!!

Chemistry

2 answers:

Ahat [919]3 years ago

8 0

Answer:

For me

Explanation:

It's Cu because other compound contains negative radicals

DENIUS [597]3 years ago

4 0

Answer:

It’s the 3rd one

Explanation:

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What usally happens when two continentel plates converge

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crunching and folds the rock at the boundary, lifts it up and leads to the formation of mountains

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3 years ago

If 18 grams of oxygen reacts completely with 4 grams of hydrogen, we would expect how many grams of water?

seraphim [82]

Answer: 22 grams because mass cannot be created or destroyed

Explanation: I just took the test

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3 years ago

Read 2 more answers

An aqueous solution that is 20.0 percent sulfuric acid (h2so4) by mass has a density of 1.105 g/ml. determine the molarity of th

GuDViN [60]

The definition of molarity is:

Molarity = moles of solute / total volume of solution in Liters

In this case, our solute is Sulfuric Acid. To solve this problem, let us assume a basis for calculation.

Let us say that,

Total mass of solution = 100 g

Therefore mass of H2SO4 = 20 g

The molar mass of H2SO4 = 98.079 g / mol

Calculating for number of moles of H2SO4:

number of moles = 20 g / (98.079 g / mol)

number of moles = 0.204 mol

Calculating for the volume of solution using the density:

total volume of solution = 100 g / (1.105 g / mL)

total volume of solution = 90.50 mL = 0.0905 L

Therefore the molarity is:

Molarity = 0.204 mol / 0.0905 L

Molarity = 2.2542 mol / L

Molarity = 2.25 M

3 0

4 years ago

How many moles are in 33 L of CO₂ gas at STP?

Leona [35]

We can assume that the volume of one mole of any gas (within reason) is 22.4 L only if we know that the pressure of the gas is 1 atmosphere (101 kPa) and that the temperature of the gas is zero degrees Celsius (273 K). These are known as standard temperature and pressure (STP). So if the gas in question happens to be at STP then the calculation would be:

3.00 L x 1 mol/22.4 L = 0.134 mol

And 3.00 litres CO2 or any other gas at STP would contain 0.134 moles. If the gas was at some other temperature or pressure, assuming they were “moderate,” you could calculate the number of moles by solving the following formula for n.

PV =nRT Where P is pressure, V is volume, T is temperature in Kelvin and R is the ideal gas constant consistent with the units of volume and pressure used.

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3 years ago

At 25 °C, how many dissociated h ions are there in 341 ml of an aqueous solution whose ph is 11. 93?

leonid [27]

0.017× $10^{23}$ dissociated H ions are there in 341 ml of an aqueous solution whose ph is 11. 93

If pH = 11.93

pOH = 14.00 - 11.93 = 2.07

[OH- ] = $10^{-2.07}$

[OH-] = 0.00851138 M

In 1 L solution we have 0.00851138 M moles OH- ions

In 0.341 L we have,

0.00851138 * 0.341

=0.0029 moles OH- ions

1 mol OH- ions = 6.022*10²³ ions

0.0029 moles OH- ions = ( 0.0029) * (6.022*10²³)

= 0.017× $10^{23}$

Therefore, 0.017× $10^{23}$ dissociated H ions are there in 341 ml of an aqueous solution whose ph is 11. 93

Learn more about dissociated ions here;

brainly.com/question/23525445

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4 0

1 year ago