3 years ago

True or false zoos are successful at captive breeding programs to prolong the life of a species.

Chemistry

1 answer:

DochEvi [55]3 years ago

4 0

Answer:

Answer: true

Explanation:

It's pretty common for zoos to captive breed endangered animals to help keep the population stable, though the ethics of it are questionable considering most of the offspring will never be able to be released into the wild.

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Determine moles of 1.5g of sodium carbonate.

KIM [24]

Answer:

0.014mol

Explanation:

Given parameters:

Mass of Na₂CO₃ = 1.5g

Unknown:

Number of moles = ?

Solution:

Number of moles of a compound is mathematically expressed as;

Number of moles = $\frac{mass}{molar mass}$

Molar mass of Na₂CO₃ = 2(23) + 12 + 3(16) = 106g/mol

Number of moles = $\frac{1.5}{106}$ = 0.014mol

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3 years ago

A student wants to prepare a solution of cobalt(II) fluoride with a known molarity.

swat32

Answer:

$\large \boxed{\text{1.52 g}}$

Explanation:

1. Calculate the moles of CoF₂ needed

$n = \text{0.100 L} \times \dfrac{\text{0.157 mol}}{\text{1 L}} = \text{0.0157 mol}$

2. Calculate the mass of CoF₂

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4 years ago

How many neutrons are present in the atom of a team that has the atomic number of 50 and the mass number of 119?

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119 (atomic mass)- 50 protons= 69 neutrons

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4 years ago