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3 years ago

Which ionic compound is used as a building material?

Chemistry

2 answers:

Anettt [7]3 years ago

7 0

Answer: Limestone

Explanation: Limestone contains calcium carbonate which are essential raw materials for the manufacture of cement used in building.

Tanzania [10]3 years ago

6 0

Answer:

Limestone

Explanation:

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Veronica is taking an average of 16 height measurements in a brand-new experiment. Which term is this the best example of?

Varvara68 [4.7K]

Answer:

Repetition

Explanation:

The best term to describe this example is repetition and not replication.

Most times, to obtain an accurate and precise reading which is reliable, scientist makes several repeated measurements. The average gives the most reliable representation of the phenomenon being tested.

This process is called repetition.

On the other hand, duplicating an experiment is replication. Experiments are replicated to proof their validity.

Since this is a brand new experiment where 16 height measurements are reported, we are dealing with a repetition situation.

4 0

3 years ago

Read 2 more answers

Is this experiment okay for this question???? If not, what would a good one be?

Fed [463]

Yes that would be ok, explain how it works though.

6 0

4 years ago

A sunscreen preparation contains 2.60 % by mass benzyl salicylate. If a tube contains 6.0 oz of sunscreen, how many kilograms of

Marrrta [24]

Answer : The mass of benzyl salicylate needed to manufacture 350 tubes of sunscreen are, 1.55 kg

Explanation :

As we are given that a sunscreen preparation contains 2.60 % by mass benzyl salicylate. That means, 2.60 grams of benzyl salicylate present in 100 g of solution.

First we have to convert the given mass from oz into kg.

Conversion used:

1 kg = 35.274 oz

or,

$1oz=\frac{1}{35.274}kg$

So,

$6oz=\frac{6oz}{1oz}\times \frac{1}{35.274}kg=0.1701kg$

Now we have to determine the mass of benzyl salicylate.

As, 100 g of solution contains mass of benzyl salicylate = 2.60 g

So, 0.1701 kg of solution contains mass of benzyl salicylate = $\frac{2.60g}{100g}\times 0.1701kg=0.00442kg$

Now we have to determine the mass of benzyl salicylate are needed to manufacture 350 tubes of sunscreen.

Mass of benzyl salicylate in 350 tubes of sunscreen = 0.00442 kg × 350

Mass of benzyl salicylate in 350 tubes of sunscreen = 1.55 kg

Thus, the mass of benzyl salicylate needed to manufacture 350 tubes of sunscreen are, 1.55 kg

6 0

4 years ago

Express the following as a whole number or as decimals: 3.5 x 10-3 m

ahrayia [7]

Multiply
10.3
by = 36.05m
3.5

.

7 0

3 years ago

What are some things that are composed of only on element?

Dominik [7]

Answer:

An aluminium drink can.

24 carat gold.

The helium gas in a balloon that floats upwards.

Cast iron garden railings.

Lead sheeting used by builders on the roofs of houses.

3 0

3 years ago