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3 years ago

Can someone please help me?

Chemistry

1 answer:

Olin [163]3 years ago

8 0

Answer:

c.)the reactants have the same mass as the products

Explanation:

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

hope it helps!

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HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)

Mariulka [41]

Answer:

Amount of $H_{2}O$ produced will be half of its original value.

Explanation:

Balanced reaction: $HCl+NaOH\rightarrow NaCl+H_{2}O$

According to balanced equation, 1 mol of HCl reacts with 1 mol of NaOH to produce 1 mol of $H_{2}O$

If amount of reactants (NaOH and HCl) are halved then we can write-

0.5 mol of HCl reacts with 0.5 mol of NaOH to produce 0.5 mol of $H_{2}O$ .

So, it is evident that amount of $H_{2}O$ to be produced will be half if amount of reactants are halved.

5 0

3 years ago

As shown in the image above, the Earth's outermost layer is divided into several tectonic plates. Which of the following is true

Tems11 [23]

The answer is B.) Some plates move toward each other, while others move away from or alongside each other.

7 0

3 years ago

Using henry's law, calculate the molar concentration of o2 in the surface water of a mountain lake saturated with air at 20 ∘c a

s2008m [1.1K]

Answer: The molar concentration of oxygen gas in water is $1.43\times 10^{-7} mol/L$ .

Explanation:

Partial pressure of the $O_2$ gas = 685 torr = 0.8905 bar

1 torr = 0.0013 bar

According Henry's law:

$p_{o_2}=K_H\times\chi_{O_2}$

Value of Henry's constant of oxygen gas at 20 °C in water = 34860 bar

$0.0013=34860 bar\times \chi_{O_2}$

$\chi_{O_2}=\frac{0.8905 bar}{34680 bar}=2.56\times 10^{-5}$

Let the number of moles of $O_2$ gas in 1 liter water be n.

1 Liter water = 1000 g of water

Moles of water in 1 L $n_w=\frac{1000 g}{18 g/mol}=55.55 mol$

$\chi_{O_2}=\frac{n}{n+n_w}$

$2.56\times 10^{-5}=\frac{n}{n+55.55}$

$n=1.43\times 10^{-7} moles$

$Molarity=\frac{\text{Moles of}O_2}{Volume}$

Molar concentration of oxygen gas in 1 L of water:

$=\frac{1.43\times 10^{-7} moles}{1 L}=1.43\times 10^{-7} mol/L$

The molar concentration of oxygen gas in water is $1.43\times 10^{-7} mol/L$ .

4 0

3 years ago

How do the circulatory system and respiratory system interact and work together?

g100num [7]

I would say because the respiratory system brings in the oxygen for the body and the circulatory system moves it throughout the body with the blood

8 0

3 years ago

Read 2 more answers

How many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 25% antifreeze to get a mixture that is 50% a

Neporo4naja [7]

Answer:

The answer to your question is 175 gallons

Explanation:

Data

60% antifreeze solution volume = ? = x

25% antifreeze solution volume = 25%

Final concentration 50%

Process

0.6x + 0.25(70) = 0.5(70 + x)

Simplification

0.6x + 17.5 = 35 + 0.5x

0.6x - 0.5x = 35 - 17.5

0.1x = 17.5

x = 17.5/0.1

Result

x = 175 gallons

6 0

4 years ago