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3 years ago

PLEASE PLEAS HELP Which of the following compounds is insoluble in water?

Chemistry

1 answer:

Alex17521 [72]3 years ago

7 0

Answer:

Your answer is d

Explanation: silver carbonate Ag2CO3 is insoluble in water

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Convert 8.876 × 10^12 m^2 to units of km^2.

Darya [45]

Answer:

$8.876\times 10^{18}\ km^2$

Explanation:

In this problem, we need to convert $8.876 \times 10^{12}\ m^2$ to km².

We know that,

1 km = 1000 m

⇒ 1 km² = 10⁶ m²

So,

$8.876 \times 10^{12}\ m^2=8.876 \times 10^{12}\times 10^6\ km^2\\\\=8.876\times 10^{18}\ km^2$

So, $8.876 \times 10^{12}\ m^2$ is equal to $8.876\times 10^{18}\ km^2$ .

7 0

2 years ago

When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2 Al ( s ) + 6 HCl ( aq ) ⟶ 2 AlCl 3 ( aq )

Dovator [93]

Answer:

The volume of hydrogen gas produced at STP is 4.90 liters.

Explanation:

$2Al (s) + 6 HCl (aq)\rightarrow 2 AlCl_3 (aq) + 3 H_2 (g)$

Moles of aluminium = $\frac{3.60 g}{27 g/mol}=0.1333 mol$

According to reaction , 2 moles of aluminium gives 3 moles of hydrogen gas.

Then 0.1333 moles of aluminium will give:

$\frac{3}{2}\times 0.1333 mol=0.2 moles$ of hydrogen gas

Volume of 0.2 moles of hydrogen gas at STP = V

Temperature at STP = T = 298.15 K

Pressure at STP = P = 1 atm

n = 0.2 mol

PV = nRT (Ideal gas equation)

$V=\frac{nRT}{P}=\frac{0.2mol\times 0.0821 atm L/mol K\times 298.15 K}{1 atm}=4.8956 L\approx 4.90 L$

The volume of hydrogen gas produced at STP is 4.90 liters.

4 0

3 years ago

This is a material that transmits most of the light that strikes to pass through and only a small amount of light is reflected o

inn [45]

Answer:

Optically Transparent

7 0

3 years ago

Large crystals are formed when _____. igneous rocks cool very quickly metamorphic rocks change into igneous rock sedimentary roc

vivado [14]

igneous rocks cool very slowly

Explanation:

Large crystals are formed when rocks cool very slowly. This gives time for crystallization nuclei to form and other crystals aggregates round it.

Large crystals in rocks are typical of intrusive igneous rocks.
These rocks are formed beneath the earth surface and they usually have big crystals.
This because they cool slowly and have time for crystal formation.
Rocks that cools rapidly are extrusive igneous rocks.
They are usually fine grained and glassy in nature.

learn more:

Volcanic eruptions brainly.com/question/5055821

#learnwithBrainly

3 0

3 years ago

Read 2 more answers

Which states of water can you find in your home? Explain.

rosijanka [135]

Answer:

all

Explanation:

water vapor is everywhere