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3 years ago

Can someone tell me how to identify the number of significant figures?

Chemistry

1 answer:

igor_vitrenko [27]3 years ago

8 0

Answer:

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.

Explanation:

1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.

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From your observations of the simulation, which strategy was most effective for quickly and efficiently producing ammonia? Why d

Bogdan [553]

Answer:

The electrochemical synthesis of ammonia from nitrogen under mild conditions using renewable electricity is an attractive alternative to the energy-intensive Haber–Bosch process, which dominates industrial ammonia production.

Explanation:

However, there are considerable scientific and technical challenges facing the electrochemical alternative, and most experimental studies reported so far have achieved only low selectivities and conversions. The amount of ammonia produced is usually so small that it cannot be firmly attributed to electrochemical nitrogen fixation rather than contamination from ammonia that is either present in air, human breath or ion-conducting membranes, or generated from labile nitrogen-containing compounds (for example, nitrates, amines, nitrites and nitrogen oxides) that are typically present in the nitrogen gas stream, in the atmosphere or even in the catalyst itself. Although these sources of experimental artefacts are beginning to be recognized and managed, concerted efforts to develop effective electrochemical nitrogen reduction processes would benefit from benchmarking protocols for the reaction and from a standardized set of control experiments designed to identify and then eliminate or quantify the sources of contamination.

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4 years ago

Do yeast need air to release carbon dioxide?

nasty-shy [4]

Yes because if you don't it might blow up I forgot what would happen

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3 years ago

On a recent excursion chemistry student extraordinaire, Melvin Blackthorne, found a gold colored coin at a flea market. The vend

ankoles [38]

Explanation:

What is the density of the coin?

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what is the mass of the iceberg in metric tons (1 metric ton = 1000 kg)?

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Volume = 35,000 m^3 = 3.5e+10cm^3 (Conversion to cm^3)

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Upon conversion to kg by dividing by 1000

Mass = 3.2088 * 10^7kg

(1 metric ton = 1000 kg)

Mass = 3.2088 * 10^3 metric tonnes

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So the volume is obtaiined by placing the irregularly shaoed solid and noting the volume of fluif displaced.

what volume of water (d = 1.000g/mL) is about to impact Melinda's head?

Volume of sphere = V = (1 / 6) πd³

Inserting the value of V = 10.7 cm

Volume = 641.43cm³

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3 years ago

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3 years ago

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Answer:

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3 years ago