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artcher [175]
3 years ago
6

What does the word homogenous mean?

Chemistry
1 answer:
kkurt [141]3 years ago
3 0

Answer:

Homogeneous means composed of parts of different kinds; having widely different elements or components.

Explanation:

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Nonmetal halogen family atmoic mass 35
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chlorine has the atomic mass of 35.5 and is a non metal in the halogen family

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JOSE BOUGHT 750 BAGS OF PEANUTS FOR 375 HE INTENDS TO SELL EACH BAG FOR 0.15 MORE THAN HE PAID HOW MUCH SHOULD HE CHARGE FOR EAC
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He paid 2 dollars for each bag. Then add 15 cents for that and he would charge $2.15 for each bag.
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If the half life of iridium-182 is 15 years, how much of a 3 gram sample is left after 2 half-lives?
padilas [110]

Answer:

D. 0.75 grams

Explanation:

The data given on the iridium 182 are;

The half life of the iridium 182, t_{(1/2)} = 15 years

The mass of the sample of iridium, N₀ = 3 grams

The amount left, N(t) after two half lives is given as follows;

N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}} }

For two half lives, t = 2 × t_{(1/2)}

∴ t = 2 × 15 = 30

\dfrac{t}{t_{(1/2)}} = \dfrac{30}{15} = 2

\therefore N(t) = 3 \times\left (\dfrac{1}{2} \right )^2 = 0.75

∴ The amount left, N(t) = 0.75 grams

4 0
3 years ago
The penguin has a ___ body that helps it to move quickly in water.
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The penguin has a sleek body that helps it to move quickly in water.
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1. How many moles of oxygen gas are needed to form 21.8 liters of water vapor?
BaLLatris [955]

0.781 moles

Explanation:

We begin by balancing the chemical equation;

O₂ (g) + 2H₂ (g) → 2H₂O (g)

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Molar mass of H₂O = 18 g/mol

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The mole ratio between water vapor and oxygen is;

1 : 2

x : 1.56

2x = 1.56

x = 1.56 / 2

x =  0.781

0.781 moles

7 0
3 years ago
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