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3 years ago

The heart has 2 chambers: The UPPER CHAMBERS are called the and the LOWER CHAMBERS are called the _

2 answers:

7 0

The heart has 2 chambers: The UPPER CHAMBERS are called the atrium and the LOWER CHAMBERS are called the ventricles

Therefore , answer is c

d1i1m1o1n [39]3 years ago

5 0

Atrium and ventricles so c

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How much energy is required to boil 65 grams of 100°C water And then heat the steam to 150°C?

Artyom0805 [142]

Answer:

13598 J

Explanation:

Q = m × c × ∆T

Where;

Q = amount of energy (J)

m = mass (grams)

c = specific heat capacity

∆T = change in temperature

m = 65g, specific heat capacity of water = 4.184J/g°C, initial temperature= 100°C, final temperature = 150°C

Q = 65 × 4.184 × (150 - 100)

Q = 271.96 × 50

Q = 13598 J

Hence, 13598 J of energy is required to boil 65 grams of 100°C water and then heat the steam to 150°C.

8 0

3 years ago

8. If 0.795 moles of ammonia gas occupies 42.5 L at 670 torr, what is the Celsius temperature?

maksim [4K]

Answer: The temperature in degree Celsius is 301.31°C

Explanation:

To calculate the temperature, we use the equation given by ideal gas, which is:

$PV=nRT$

P = pressure of the gas = 670 torr = 0.882 atm (Conversion factor: 1 atm = 760 torr)

V = volume of gas = 42.5 L

n = number of moles of gas = 0.795 mol

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = temperature of gas

Putting values in above equation, we get:

$0.882atm\times 42.5L=0.795mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times T\\\\T=574.31K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$574.31=T(^oC)+273\\T(^oC)=301.31^oC$

Hence, the temperature in degree Celsius is 301.31°C

6 0

3 years ago

The heart has 2 chambers: The UPPER CHAMBERS are called the ______________ and the LOWER CHAMBERS are called the _______________

The heart has 2 chambers: The UPPER CHAMBERS are called the and the LOWER CHAMBERS are called the _