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nlexa [21]
3 years ago
6

Which of the following correctly identifies a bryophyte

Chemistry
1 answer:
Free_Kalibri [48]3 years ago
7 0

Answer:

1) bryophyte are also called amphibians of plants kingdom

2) presence of jacketed sex organ

3) they are thalloid

4) vascular tissue are absent

5) sexual reproduction is Oogamous

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fish tank initially contains 35 liters of pure water. Brine of constant, but unknown, concentration of salt is flowing in at 5 l
weeeeeb [17]

Answer:

Therefore, the rate of change in the amount of salt is \frac{dx}{dt} =( 5c}{ - \frac{x }{20})

\frac{grams }{min}

Explanation:

Given:

Initial volume of water V = 35 lit

Flowing rate = 5 \frac{Lit}{min}

The rate of change in the amount of salt is given by,

   \frac{dx}{dt} = ( Rate of salt enters tank - rate of sat leaves tank )

Since tank is initially filled with water so we write that,

x(0) = 0

Let amount of salt in the solution is c,

  \frac{dx}{dt} = \frac{5c}{1 } - \frac{x(t) \times 5}{100}

  \frac{dx}{dt} =( 5c}{ - \frac{x }{20}) \frac{grams}{min}

Therefore, the rate of change in the amount of salt is \frac{dx}{dt} =( 5c}{ - \frac{x }{20})

\frac{grams }{min}

7 0
3 years ago
Imagine that you have a 5.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylen
Lorico [155]

Answer:

77.14 atm of pressure should be of an acetylene in the tank.

Explanation:

2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O

According to reaction, 2 moles of acetylene reacts with 5 moles of oxygen.

Moles of oxygen=n_1

Moles of acetylene =n_2

\frac{n_1}{n_2}=\frac{5 mol}{2 mol}=\frac{5}{2}

Volume of large tank with oxygen gas, V_1 = 5.00 L

Pressure of the oxygen gas inside the tank = P_1=135 atm

RT=\frac{P_1V_1}{n_1} ..[1]

Volume of small tank with acetylene gas ,V_2= 3.50 L

Pressure of the acetylene gas inside the tank = P_2=?

RT=\frac{P_2V_1}{n_2} ..[2]

Considering both the gases having same temperature T, [1]=[2]

\frac{P_1V_1}{n_1}=\frac{P_2V_2}{n_2}

P_2=\frac{P_1V_1\times n_2}{V_2\times n_1}

=\frac{135 atm\times 5.00 L\times 2}{3.50 L\times 5}=77.14 atm

77.14 atm of pressure should be of an acetylene in the tank.

8 0
3 years ago
Which fossil fuel is a solid?<br> O oil<br> coal<br> O natural gas
zmey [24]

Answer:

Coal

Explanation:

5 0
2 years ago
A wind that blows at a constant speed parallel to curved isobars or contour lines is called a
ELEN [110]

A wind that blows at a constant speed parallel to curved isobars or contour lines is called a. gradient wind. Pressure changes. more rapidly in the vertical direction than in the horizontal. the pressure gradient force is directed from higher pressure toward lower pressure.

6 0
3 years ago
The total amount of energy that remains in the system always ______ even in an ideal system with no friction or air resistance.
Marizza181 [45]
The amount of energy stays the same
3 0
3 years ago
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