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lisabon 2012 [21]
3 years ago
14

Which of these is an example of a direct observation? Choose the correct answer.

Chemistry
1 answer:
Elanso [62]3 years ago
4 0

Answer:

pushing rubber mats together to predict the behavior of plate tectonics

Explanation:

pushing rubber mats together to predict the behavior of plate tectonics is an example of direct observation because direct observation involves the process of using your senses and evaluating or observing closely the subject matter in other to gather informations. Through direct observations you can gather informations through activities, behaviors without depending on people's opinions to gather information needed.

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If a compound contains a poly atomic ion then what type of compound is it A. Convalent Compound B. Ionic Compound
den301095 [7]

Answer:

B. Ionic Compound

Explanation:

An ionic compound is that compound which contains a positively charged ion called CATION and a negatively charged ion called ANION. The cation loses or transfers electrons to the anion, hence, making the former (cation) positive and the latter (anion) negative.

A polyatomic ion is an ion that contains more than one type of atom e.g OH-, NO3²-, CO3²- etc. A polyatomic ion usually has an overall charge formed from the charges of the individual atoms that makes it up. For example, in OH-, the overall charge is -1.

Since a polyatomic ion can have an overall positive or negative charge, it must enter a reaction with another ion that complements it i.e. a negative polyatomic ion will react with a positive ion to neutralize its charge. Hence, this forms an IONIC COMPOUND. This is why most compounds with polyatomic ions are IONIC COMPOUNDS.

For example, CaCO3 is an ionic compound formed when Ca²+ (cation) reacts with the polyatomic anion: CO3²-

5 0
3 years ago
A flashlight using two 1.5 V D-cells contains a bulb that can withstand up to 0.5 A of current. What would be the maximum power
Anastaziya [24]
The answer to your question is- 1.5 W. Hope this helped!
4 0
3 years ago
Mass = 126g volume = 15 cm3 what is the density =
Tju [1.3M]
D =mass / volume

d = 126 g / 15 cm³

d = 8,4 g/cm³
7 0
3 years ago
How many days is 1.6 x 10^7 minutes?
Over [174]

(1.6 \times  {10}^{7}) \: min \times  \frac{1 \: hour}{60 \: min} \times  \frac{1 \: day}{24 \: hour}

= 11111.11111 \: days

(round as you wish)

8 0
3 years ago
What is the substance that is formed when the acid react with bases in a neutralization reaction?​
Leya [2.2K]

Answer:

Water and Salt

Explanation:

A neutralization reaction occurs when an acid and a base react to produce water and a salt, and it entails the formation of water from the mixture of H+ and OH- ions.

4 0
3 years ago
Read 2 more answers
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