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Mkey [24]
3 years ago
7

Which solution would most likely cause a plant placed in it to become firmer and more rigid? A. hypertonic B. hypotonic C. isoto

nic D. osmotic
Chemistry
2 answers:
prisoha [69]3 years ago
6 0

Answer:

B

Explanation:

Anna11 [10]3 years ago
5 0
"Hypotonic" is the one solution among the choices given in the question that would <span>most likely cause a plant placed in it to become firmer and more rigid. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer has come to your great help.</span>
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How does mg2+ block the effect of extracellular calcium on neurotransmitter release?
svetlana [45]
<span>Magnesium is a strong anode than calcium. So, Mg will be oxidized into Mg2+. So instead of having Ca being the reducing agent, Mg will takes its place. That's how the "Blocking" occur.
</span><span>Without Ca2+, no neurotransmitter was released because the exocytosis of the synaptic vesicles is dependent upon Ca2+.
</span>So, when magnesium is added to the extracellular fluid it blocks the calcium channels and inhibits the release of <span>neurotransmitter.</span>
5 0
4 years ago
Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has a half-life of 1.26 109 year
melomori [17]

Answer:

m_{o} \approx 3.247\times 10^{-7}\,g

Explanation:

The mass of radioactive isotope at a certain time is given by the following expression:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }

Time constant can be calculed in terms of half-life:

\tau = \frac{t_{1/2}}{\ln 2}

\tau = \frac{1.26\times 10^{9}\,yr}{\ln 2}

\tau = 1.818\times 10^{9}\,yr

The initial mass is:

m_{o} = \frac{2.73\times 10^{-7}\,g}{e^{-\frac{3.15\times 10^{8}\,yr}{1.818\times 10^{9}\,yr} }}

m_{o} \approx 3.247\times 10^{-7}\,g

8 0
3 years ago
Co (5.00 g) and co2 (5.00 g) were placed in a 750.0 ml container at 50.0°c. the total pressure in the container was __________ a
masya89 [10]

The molar mass of CO is 28 g/mol while that of CO2 is 44 g/mol. Let us calculate the total moles present in the container.

total moles = [5g / (28 g/mol)] + [5g / (44 g/mol)]

total moles = 0.2922 mol

 

Using PV = nRT, we get the pressure:

P = nRT / V

P = (0.2922 mol * 0.0821 L atm/mol K * 323.15 K) / 0.75 L

<span>P = 10.34 atm</span>

6 0
4 years ago
Read 2 more answers
How much energy is released if a sample loses 0.001 kg mass through radioactive decay?
stealth61 [152]

Explanation:

because the energy it can't be calculated

4 0
2 years ago
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What is stoichiometry?​
aliya0001 [1]

Answer:

the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers.

Explanation:

G o o g l e

3 0
3 years ago
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