3 years ago

Question 1 (1 point) ROOTS--What is NOT a root function in plants?

Chemistry

1 answer:

Jlenok [28]3 years ago

3 0

Answer:

deez nuets

Explanation:

bf gm Jr rj if dl if did fll j fll kd golf du is no u to

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Which of the following elements is likely to show additional stability in its electronic configurations because of filled and ha

kodGreya [7K]

Ah is gold and Rh is rhodium and Os is osmium and Ir iridium

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3 years ago

The smallest particle of an element is a(n) .<br>atom<br>molecule<br>DNA

mamaluj [8]

Answer:

An atom is the smallest particle of an element

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3 years ago

Write the empirical formula of at least four binary iconic compounds that could be formed from the following ions:

Nat2105 [25]

Explanation:

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3 years ago

What is the molarity when 0.181 moles of MgNO3)2 are dissolved in enough water to make 0.750 L solution?

eimsori [14]

Answer:

Molarity = 0.24 M

Explanation:

Given data:

Number of moles of Mg(NO₃)₂ = 0.181 mol

Volume of solution = 0.750 L

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

by putting values,

Molarity = 0.181 mol / 0.750 L

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3 years ago

What is the half-life of an isotope that decays to 6.25% of its original activity in 18.9 hours?

inessss [21]

Radioactive material obeys 1st order decay kinetics,
For 1st order reaction, we have
k = $\frac{2.303}{t}Xlog \frac{\text{initial conc.}}{\text{final conc.}}$
where, k = rate constant of reaction

Given: Initial conc. 100, Final conc. = 6.25, t = 18.9 hours

∴ k = $\frac{2.303}{18.9} X log \frac{100}{6.25}$ = 0.1467 hours^(-1)

Now, for 1st order reactions: half life = $\frac{0.693}{k} = \frac{0.693}{0.1467}$ = 4.723 hours.

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3 years ago