3 years ago

Formulate a hypothesis based on something recently observed.

1 answer:

3 0

Answer:

If garlic repels fleas, then a dog that is given garlic every day will not get fleas. Bacterial growth may be affected by moisture levels in the air. If sugar causes cavities, then people who eat a lot of candy may be more prone to cavities.

Explanation:

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Classify metals based on more reactive, moderate and less reactive

Alex17521 [72]

more reactive metals:

potassium (highest reactivity)

sodium

calcium

magnesium

moderate reactive metals:

aluminium

zinc

iron

lead

least reactive metals:

copper

mercury

silver

gold (least reactivity)

5 0

4 years ago

How many inner, outer, and valence electrons are present in an atom of each of the following elements?

telo118 [61]

Answer:

(a) O = Valance Electrons (6), Inner electrons (8)

(b) Sn = Valance Electrons (2), Inner electrons (36)

(c) Ca = Valance Electrons (2), Inner electrons (20)

(d) Fe = Valance Electrons (2), Inner electrons (26)

(e) Se = Valance Electrons (6), Inner electrons (34)

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3 years ago

This chart show the amount of radioactivity measured from three unknown isotopes.

Ad libitum [116K]

Answer:

We are asked to describe the half-life of the radioactive materials.

Hence the 3rd option is correct

5 0

3 years ago

I'll give you a cookie

Llana [10]

Answer:

B. Is the correct answer :) i hope this helps!!

Explanation:

brainliest please?

8 0

3 years ago

Read 2 more answers

Sodium metal is sometimes used as a cooling agent in heat exchange units because of its relatively high molar heat capacity of 2

IgorC [24]

Answer:

The specific heat of sodium is 1,23J/g°C

Explanation:

Using the atomic weight of sodium (23g/mol) and the atomic weight definition, we have that each mole of the substance has 23 grams of sodium.

starting from this, we use the atomic weight of sodium to convert the units from J / mol ° C to J / g ° C

$28,2 \frac{J}{mol C} x \frac{1mol}{23g} = 1,23 J/g C$

4 0

3 years ago