3 years ago

What part of the scientific method involves controlling variables while testing a hypothesis

Chemistry

1 answer:

Minchanka [31]3 years ago

5 0

Answer:

<em>Making observation</em>

Explanation:

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A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 x 10^20 molecules

blsea [12.9K]

Answer:

Explanation:

100 minutes is 5 half lives ( 100 min/20 min/half life)

= (1/2 )^5

1 x 10^20 * (1/2)^5 = 3.125 x10^18 molecules

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2 years ago

What valence electron number do they all have in common

katovenus [111]

If they are in the same group they have the same valence electrons but since I cannot see what you’re talking about I’m not sure what your question is

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3 years ago

Mg(OH)2 + 2HNO3 → Mg(NO3)2 + 2H20

LenaWriter [7]

Answer:

A. 1350

You multiply 18.21HNO3* 1mol MgN2O6 * 148.30MgN2O6

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3 years ago

How many oxygen molecules are in 5.17g of oxygen gas

Alex787 [66]

Answer:

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3 years ago

Gold is currently trading at very high price. Suppose that gold is selling for around $1860/ounce. How

Ugo [173]

Answer:

The answer is "3.81041978"

Explanation:

$\to 1 \ OZ= 28.349523125 \ grams\\\\$

$=28.349523125\times {1000} \ miligrams\\\\= 28349. 5231 \ miligrams\\$

In 1860 $= 28349.5231 \ miligrams\\$

$\to In \$ \ 1 = \frac{28349.5231}{1860} \ \ miligrams\\$

$= 15.2416791 \ miligrams$

$\ In \ 1 \ quarter = \$ \ 0.25$

$\to \$ \ 0.25 = 15.2416791 \times 0.25 \ miligrams\\$

$= 3.81041978$

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3 years ago