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2 years ago

Pls answer it will be really helpful

Chemistry

2 answers:

IRISSAK [1]2 years ago

4 0

Answer:

304 because 76% - 400 is 96, subtract 400 by 96

vlabodo [156]2 years ago

3 0

It’s 96 I believe? Sorry if I’m wrong

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On a warm summer day in Oslo, the temperature is 21 degree C and the relative humidity is 70%. What is the absolute humidity? Wh

lesya [120]

Explanation:

According to the psychrometric chart at dry bulb temperature of $21^{o}C$ and RH 70%, the absolute humidity = 0.011 kg/kg dry air

Formula to calculate humid volume is as follows.

$\nu_{H} m^{3}/kg$ dry air = $\frac{22.41}{273}TK (\frac{1}{28.97} + \frac{1}{18.02}H)$

= $(2.83 \times 10^{-3} + 4.56 \times 10^{-3} H) T K$

= $(2.83 \times 10^{-3} + 4.56 \times 10^{-3} \times 0.011) \times 294$

= 0.847 $m^{3}/kg$ dry air

Hence, humid volume of air is 0.847 $m^{3}/kg$ dry air.

Specific enthalpy of dry air = specific heat capacity of dry air × dry bulb temperature

= $1.006 kJ/kg ^{o}C \times 21^{o}C$

= 21.126 kJ/kg dry air

Hence, the specific enthalpy of the air is 21.126 kJ/kg dry air.

As per the psychrometric chart at given conditions wet bulb temperature = 17.5 $^{o}C$

As per the psychrometric chart at given conditions dew point temperature = 15.5 $^{o}C$

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2 years ago

In which era did the first fish appear?

VARVARA [1.3K]

C Because Mesozoic Is An Era The First Fish Seen

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2 years ago

When the volume of a gas is

Montano1993 [528]

Answer:

$\boxed {\boxed {\sf 232.9 \textdegree C}}$

Explanation:

This question asks us to find the temperature change given a volume change. We will use Charles's Law, which states the volume of a gas is directly proportional to the temperature. The formula is:

$\frac {V_1}{T_1}= \frac{V_2}{T_2}$

The volume of the gas starts at 250 milliliters and the temperature is 137 °C.

$\frac{250 \ mL}{137 \textdegree C}= \frac{V_2}{T_2}$

The volume of the gas is increased to 425 milliliters, but the temperature is unknown.

$\frac{250 \ mL}{137 \textdegree C}= \frac{425 \ mL}{T_2}$

We are solving for the new temperature, so we must isolate the variable T₂. First, cross multiply. Multiply the first numerator and second denominator, then multiply the first denominator and second numerator.

$250 \ mL * T_2 = 137 \textdegree C * 425 \ mL$

Now the variable is being multiplied by 250 milliliters. The inverse of multiplication is division. Divide both sides of the equation by 250 mL.

$\frac{250 \ mL * T_2}{250 \ mL}=\frac{ 137 \textdegree C * 425 \ mL}{250 \ mL}$

$T_2=\frac{ 137 \textdegree C * 425 \ mL}{250 \ mL}$

The units of milliliters (mL) cancel.

$T_2=\frac{ 137 \textdegree C * 425 }{250 }$

$T_2= \frac{58225}{250} \textdegree C$

$T_2=232.9 \textdegree C$

The temperature changes to 232.9 degrees Celsius.

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2 years ago

How does the vegetation surface type affect the amount of runoff

maxonik [38]

Answer:

The type of vegetation a surface does affect the water coming from above to sink in or runoff. 

Explanation:

This is how the vegetation affects the runoff:-

The leaves and stems present in the vegetation do not let the water fall directly on the soil and makes the process rather slow which makes the water to get to the ground slowly and sink in properly inside the soil rather than running off.

If the vegetation present is dense with there was being hairy then also the water would not run out and will get absorbed by the roots letting the soil intact

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2 years ago

The layer of the Earth that the lithospheric plates move on top of is called the

ikadub [295]

Answer:

A. Lithosphere

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2 years ago