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zhannawk [14.2K]
2 years ago
10

How many moles of Na2SO4 can be made with 7.28 mol of H2SO4?

Chemistry
1 answer:
Slav-nsk [51]2 years ago
5 0

Answer:

7.28 mol Na2SO4

Explanation:

Since it is already in moles, all we have to do is use a molar ratio

A molar ratio is the proportions of reactants and products using the balanced equation. When writing a mole ratio, the given information must cross out with the right thing.

7.28 mol H2SO4 * 1 mol Na2SO4/1 H2SO4 = 7.28 mol Na2SO4

*notice how the H2SO4 crosses out

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vazorg [7]

Answer:

1.The Aluminum block

2.its surroundings absorb energy from it.

Explanation:

In this question it is important to remember that density of an object is the mass of that object divided by its volume.

The expression applied here is density=mass/volume

Given that the mass is constant,lets say mass= m=1g

and density of aluminum=2.7g/cm³ and that of iron is 7.8 g/cm³ then volume=?

Volume=mass/density

Volume of aluminum= 1/2.7 =0.3704 cm³

Volume of iron = 1/7.8 =0.1282 cm³

Here we see volume of Aluminum block is the largest.

2.As water in an ice cube tray freezes, its surroundings absorb energy from it.When the water freezes, latent heat of freezing is given out to the surrounding.When water is freezing, it stays at a constant temperature of 0°C, the heat energy released ensures that there is no cooling past 0 °C.

8 0
3 years ago
What are some of the uses of copper?​
Dmitrij [34]

Answer:

Explanation:

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3 0
2 years ago
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Which is NOT a property of gold?
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3 years ago
Hot air at 80°C is blown over a 2-m by> on0 4-m flat surface at 30°C. If the average? convection heat transfer coefficient va
mars1129 [50]

Explanation:

The given data is as follows.

       T_{air} = 80 ^{o}C,       T_{surface} = 30 ^{o}C

Area of the flat plate is 2 × 4 = 8 m^{2}.

Average convection heat transfer coefficient (h_(avg)) = \frac{(20 + 100) W/m^{2} ^{o}C}{2} = 60 W/m^{2} ^{o}C}.

Hence, formula to calculate heat transfer through convection from air to the water is given as follows.

                    q = h_{avg} \times A_{surface} \times (T_{air} - T_{surface})

                        = 60 W/m^{2} ^{o}C} \times 8 m^{2} \times [(80 - 30)]^{o}C

                        = 24000 W

or,                     = 24 kW

Hence, the direction of heat flow is from air to the surface.

Thus, we can conclude that transfer of heat is 24 kW.

7 0
3 years ago
calculate, a can of chicken broth contains 450 mg of sodium chloride in 240.0g of broth. What is the percent by mass of sodium c
svetlana [45]

Answer:

The percent by mass of sodium chloride in the broth is 0.1875 %

Explanation:

Our first step is transforming the sodium chloride figure from mg to g

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Now, we must calculate the percentage by using the following formula:

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Henceforth, we can conclude that the percentage by mass of sodium chloride in the broth is 0.1875%

5 0
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