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2 years ago

What property of water is most important for living things?

Chemistry

2 answers:

Bess [88]2 years ago

5 0

Answer:

Water has the unique ability to dissolve many polar and ionic substances. This is important to all living things because, as water travels through the water cycle, it takes many valuable nutrients along with it! Water has high heat capacity.

Explanation:

hichkok12 [17]2 years ago

4 0

Answer:

Explanation:

You might be interested in

What is the best reason for the scientific community to accept a theory?

Marianna [84]

Answer: The best reason the scientific community will accept a theory is if it is proven.

4 0

2 years ago

If i have 340mL of a 1.5 M NaBr solution, What will the concentration be for 1000mL?

Gekata [30.6K]

Answer:

0.51M

Explanation:

Given parameters:

Initial volume of NaBr = 340mL

Initial molarity = 1.5M

Final volume = 1000mL

Unknown:

Final molarity = ?

Solution;

This is a dilution problem whereas the concentration of a compound changes from one to another.

In this kind of problem, we must establish that the number of moles still remains the same.

number of moles initially before diluting = number of moles after dilution

Number of moles = Molarity x volume

Let us find the number of moles;

Number of moles = initial volume x initial molarity

Convert mL to dm³;

1000mL = 1dm³

340mL gives $\frac{340}{1000}$ = 0.34dm³

Number of moles = initial volume x initial molarity = 0.34 x 1.5 = 0.51moles

Now to find the new molarity/concentration;

Final molarity = $\frac{number of moles}{Volume}$ = $\frac{0.51}{1}$ = 0.51M

We can see a massive drop in molarity this is due to dilution of the initial concentration.

6 0

2 years ago

Sulfur dioxide, SO 2 ( g ) , can react with oxygen to produce sulfur trioxide, SO 3 ( g ) , by the reaction 2 SO 2 ( g ) + O 2 (

Alex

Answer:

ΔHorxn = - 11.79 KJ

Explanation:

2 SO 2 ( g ) + O 2 ( g ) ⟶ 2 SO 3 ( g )

The standard enthalpies of formation for SO 2 ( g ) and SO 3 ( g ) are Δ H ∘ f [ SO 2 ( g ) ] = − 296.8 kJ / mol Δ H ∘ f [ SO 3 ( g ) ] = − 395.7 kJ / mol

From the reaction above, 2 mol of SO2 reacts to produce 2 mol of SO3. Assuming ideal gas behaviour,

1 mol = 22.4l

x mol = 2.67l

Upon cross multiplication and solving for x;

x = 2.67 / 22.4 = 0.1192 mol

0.1192 mol of SO2 would react to produce 0.1192 mol of SO3.

Amount of heat is given as;

ΔHorxn = ∑mΔHof(products) − ∑nΔHof(reactants)

Because O2(g) is a pure element in its standard state, ΔHοf [O2(g)] = 0 kJ/mol.

ΔHorxn = 0.1192 mol * (− 395.7 kJ / mol) - 0.1192 mol * ( − 296.8 kJ / mol)

ΔHorxn = - 47.17kj + 35.38kj

ΔHorxn = - 11.79 KJ

5 0

2 years ago

A typical coffee mug holds about 355,000 microliters of liquid. How many kiloliters of liquid does this mug hold expressed in st

skad [1K]

Answer:

$3.55\times 10^{-4}\ kL$

Explanation:

Given that,

A typical coffee mug holds about 355,000 microliters of liquid.

$1\ \mu L=10^{-6}\ L$

Also, 1 L = 0.001 kL

$10^{-6}\ L=0.001\times 10^{-6}\ kL\\\\=10^{-9}\ kL$

So, a typical coffee mug holds about $355000 \times 10^{-9}\ kL$ or $0.000355\ kL$ of liquid.

We need to convert it into Scientific notation.

We will shift 4 zeros to right. As a result,

$V=3.55\times 10^{-4}\ kL$

So, the mug will hold $3.55\times 10^{-4}\ kL$ of liquid.

3 0

2 years ago

How many atoms are in 3 moI of helium

disa [49]

Mark Brainiest please

Answer:
1.8 x 10^24

One mole of helium has 6.02 x 10^23 atoms, thise number is also called Avogadro's number or constant.
If we need number of atoms for 3 moles so simply, multiply 3 by 6.02 x 10^23
so,
Number of atoms for 3 moles = 3 x ()
Number of atoms will be = 1.806x10^24

5 0

2 years ago

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