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4 years ago

How do T cells differ from B cells

Chemistry

2 answers:

Komok [63]4 years ago

6 0

Girl what are t sells and what are b sells

Bond [772]4 years ago

4 0

T cells kill viruses by themselves while B cells don’t. B cells can connect to intact antigens right on the surface of the invading virus or bacteria. T cells can only connect to parts of virus antigens on the outside of infected cells

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In the figure shown, AD, CE, and FB intersect at point F.

EleoNora [17]

Answer:

you need to send us the figure

Explanation:

7 0

3 years ago

A gas with a volume of 4.0L at a pressure of 205 kPa is allowed to expand to a volume of 12000 mL. What is the pressure in atmos

Leni [432]

Answer: The pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$ (At constant temperature and number of moles)

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure of gas = 205 kPa

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = 4.0 L

$V_2$ = final volume of gas = 12000 ml = 12 L (1L=1000ml)

$205\times 4.0=P_2\times 12$

$P_2=68.3kPa=0.674atm$ (1kPa=0.0098atm)

Therefore, the pressure in atmospheres is 0.674 in the container if the temperature remains constant.

8 0

3 years ago

a 2.7 L of N2 is collected at 121kpa and 288 K . if the pressure increases to 202 kpa and the temperature rises to 303 K , what

jok3333 [9.3K]

Answer:

The gas will occupy a volume of 1.702 liters.

Explanation:

Let suppose that the gas behaves ideally. The equation of state for ideal gas is:

$P\cdot V = n\cdot R_{u}\cdot T$ (1)

Where:

$P$ - Pressure, measured in kilopascals.

$V$ - Volume, measured in liters.

$n$ - Molar quantity, measured in moles.

$T$ - Temperature, measured in Kelvin.

$R_{u}$ - Ideal gas constant, measured in kilopascal-liters per mole-Kelvin.

We can simplify the equation by constructing the following relationship:

$\frac{P_{1}\cdot V_{1}}{T_{1}} = \frac{P_{2}\cdot V_{2}}{T_{2}}$ (2)

Where:

$P_{1}$ , $P_{2}$ - Initial and final pressure, measured in kilopascals.

$V_{1}$ , $V_{2}$ - Initial and final volume, measured in liters.

$T_{1}$ , $T_{2}$ - Initial and final temperature, measured in Kelvin.

If we know that $P_{1} = 121\,kPa$ , $P_{2} = 202\,kPa$ , $V_{1} = 2.7\,L$ , $T_{1} = 288\,K$ and $T_{2} = 303\,K$ , the final volume of the gas is:

$V_{2} = \left(\frac{T_{2}}{T_{1}} \right)\cdot \left(\frac{P_{1}}{P_{2}} \right)\cdot V_{1}$

$V_{2} = 1.702\,L$

The gas will occupy a volume of 1.702 liters.

6 0

3 years ago

A student mixes a white solid and a clear liquid together. The mixture turning orange is evidence of a chemical reaction.

yulyashka [42]

Answer:

true

Explanation:

7 0

3 years ago

Read 2 more answers

24 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!

erastovalidia [21]

I'd say b, but i'm not 100 percent sure.<span />

6 0

3 years ago

Read 2 more answers