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Alekssandra [29.7K]
3 years ago
7

Why do plants need sap?

Chemistry
2 answers:
Nadya [2.5K]3 years ago
8 0
Plants don't need sap. They make it like Maple trees.
True [87]3 years ago
7 0
Plants need sap as in a plant call there is a large vacuole which contains call sap. ALSO and as vacuole is a larger content of call and will not contain its composition it would effect the cell growth  <span />
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100 PNTS ANSWER ASAP PLZ The density of a particular small rubber ball is 1.1 g/cm3. It was dropped into a 100 mL beaker filled
AlekseyPX

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Explanation:

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Alexus [3.1K]

Your answer is 4 protons 4 electrons and 5 neutrons

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Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25
alekssr [168]

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Americium-241 is used in smoke detectors. it has a first order rate constant for radioactive decay of k=1.6×10−3yr−1. by contras
Helga [31]
This question is missing the part that actually asks the question. The questions that are asked are as follows:

(a) How much of a 1.00 mg sample of americium remains after 4 day? Express your answer using 2 significant figures.

(b) How much of a 1.00 mg sample of iodine remains after 4 days? Express your answer using 3 significant figures.

We can use the equation for a first order rate law to find the amount of material remaining after 4 days:

[A] = [A]₀e^(-kt)

[A]₀ = initial amount
k = rate constant
t = time
[A] = amount of material at time, t.

(a) For americium we begin with 1.00 mg of sample and must convert time to units of years, as our rate constant, k, is in units of yr⁻¹.

4 days x 1 year/365 days = 0.0110

A = (1.00)e^((-1.6x10^-3)(0.0110))
A = 1.0 mg

The decay of americium is so slow that no noticeable change occurs over 4 days.

(b) We can simply plug in the information of iodine-125 and solve for A:

A = (1.00)e^(-0.011 x 4)
A = 0.957 mg

Iodine-125 decays at a much faster rate than americium and after 4 days there will be a significant loss of mass.
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3 years ago
Who invented carbon element?
igor_vitrenko [27]
Carbon discovered in Prehistoric times.. Discoverer will probably never be known
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