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3 years ago

15

The equation for the formation of water from its elements, h2(g) + o2(g)  h2o(l), can be "balanced" by changing the formula of

the product to h2o2. explain why this is incorrect

1 answer:

ANTONII [103]3 years ago

5 0

You can’t have 2 oxygens

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A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the sameconcentration of s

elixir [45]

Answer: Molarity of a physiological saline solution is 0.15 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

n = moles of solute

$V_s$ =volume of solution in ml

Given : 0.89 g of sodium chloride in 100 ml of solution.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.89g}{58.5g/mol}=0.015moles$

Volume of solution = 100 ml

$Molarity=\frac{0.015\times 1000}{100ml}=0.15M$

Molarity of physiological saline solution is 0.15 M

4 0

3 years ago

An atom of helium is smaller in width then an atom of hydrogen, but it's more then twice the mass. Why are these different?

VLD [36.1K]

Answer:

i think it cuz ones broken down by fision more

Explanation:

6 0

3 years ago

Do you think crystals formed in conditions that were stable or did they change often?

andreev551 [17]

Answer:

They were made in unstable conditions

Explanation: Im smarty pants

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3 years ago

The mass of a boy is 60 kg. Calculate his weight if the value of g is 9.8 ms2

Ludmilka [50]

Answer:

Weight = mass × gravitational

Weight = 60 kg × 9.8 ms²

= 588 N

Explanation:

hope it helps

5 0

3 years ago

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A image of a drag race car has long arrow A pointing up, medium length arrow B pointing down, medium length arrow C pointing for

DochEvi [55]

<h3><u>Answer:</u></h3>

Which arrow represents the force of gravity acting upon the car?

✔ B

Which arrow represents the normal force on the car?

✔ A

Which arrow represents the applied force on the car when the driver steps on the gas pedal?

✔ C

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3 years ago

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