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tamaranim1 [39]

3 years ago

6

Vaccanation against the flu should not be required

1 answer:

sergiy2304 [10]3 years ago

4 0

Vaccination against the flu should not be required because:
- There have been recalls on vaccinations due to problems which will harm you more than the thing they are trying to prevent
- They are pure estimate since there are hundreds of forms of the flu, the percentage rate for success goes from about 50-80%, there have been years where they had 20% rates (aka nothing was prevented)
- Antibiotic resistance is growing and we are running out of vaccinations that work, lowering the amount of users would let the effects of a certain vaccination last longer

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Name some compounds and please amswer me guys Im from Australia and please follow bro.....Lusss

swat32

Answer:

Some common compounds in our daily lives:

Water, H2O. We need this for survival, because it serves a lot of functions in our body, such as being a medium for chemical reactions in our cells.

Carbon Dioxide, CO2. It is one of the components of air, our body also produces CO2 during respiration.

Sodium chloride, NaCl. Table salt is mostly made of sodium chloride. It is also found dissolved in sea water.

Methane, C2H4. This is a common fuel for generating electricity. It can also be found (small amounts) in air.

Nitrogen Dioxide, NO2. It can also be found in air, and it is one of the common air pollutants brought by burning of fossil fuels.

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3 years ago

If the pressure on the surface of water in the liquid state is<br> 40 kpa, the water will boil at?

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Round off the following number to four significant figures.<br> 273.15

Evgesh-ka [11]

Answer:

273.2

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3 years ago

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How much heat is required to warm 50.0 g of ice from -10.0oC to 0.00oC, melt the ice, warm the water from 0.00oC to 100.0oC, boi

ludmilkaskok [199]

The total heat required to convert the ice to steam is 155,000 J.

The given parameters:

<em>Mass of the ice, m = 50 g</em>
<em>Initial temperature of the ice, t = -10 ⁰C</em>
<em>Final temperature of the ice, T = 0⁰C, 100⁰C and 120⁰C</em>
<em>Specific heat capacity of water = 4.184 J/g⁰C</em>
<em>Heat of fusion of ice, = 333.55 J/g</em>
<em>Heat of vaporization, = 2,230 J/g</em>

<em />

The heat required to raise the temperature to 0⁰C is calculated as;

$Q = mc\Delta t\\\\Q_1 = 50 \times 4.184 \times (0 - (-10))\\\\Q_1 = 2092 \ J$

The heat required to melt the ice is calculated as follows;

$Q_2 = mL_f\\\\Q_2 = 50 \times 333.55 \\\\Q_2 = 16,677.5 \ J$

The heat raise the temperature to 100⁰C is calculated as;

$Q_3 = 50 \times 4.184 \times (100 - 0)\\\\Q_3 = 20,920 \ J$

The heat required to boil the water is calculated as follows;

$Q_4 = mL_v\\\\Q_4 = 50 \times 2230\\\\4_4 = 111,500 \ J$

The heat raise the temperature to 120⁰C is calculated as;

$Q_5 = 50 \times 4.184 \times (120 - 100)\\\\Q_5 = 4,184 \ J$

The total heat required is calculated as follows;

$Q_t = Q_1 + Q_2 + Q_3 + Q_4 + Q _5 \\\\Q_t = 2092 + 16,677.5 + 20,920 + 111,500 + 4,184\\\\Q_t = 155,373.5 \ J\\\\Q_t \approx 155,000 \ J$

Learn more about heat capacity here: brainly.com/question/16559442

4 0

3 years ago