1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Pavlova-9 [17]
3 years ago
9

A student is building an electrical circuit.

Chemistry
2 answers:
Savatey [412]3 years ago
5 0

Answer:

A a metal such as copper

Explanation:

lubasha [3.4K]3 years ago
3 0

Answer:

A metal such as copper, because its atoms have very mobile electrons

Explanation:

You might be interested in
Read the scientific question below.
svetlana [45]
If we fertilize a plant, then its height increases fast. Always use if then format
8 0
2 years ago
The balanced equation for combustion in an acetylene torch is shown below: 2C2H2 + 5O2 → 4CO2 + 2H2O The acetylene tank contains
andriy [413]

Answer: 67.2 moles

Explanation: 2C_2H5+5O_2\rightarrow 4CO_2+2H_2O

According to the given balanced equation, 2 moles of acetylene C_2H_2 combine with 5 moles of oxygen O_2  to produce 4 moles of carbon dioxide CO_2.

Thus if 2 moles of acetylene C_2H_2 combine with = 5 moles of oxygen O_2

35 moles of acetylene C_2H_2 combine with=\frac{5}{2}\times {35}=87.5 moles of oxygen O_2

But as only 84 moles of oxygen are available, acetylene is not a limiting reagent.

5 moles of oxygen O_2 reacts with = 2 moles of acetylene C_2H_2

84 moles of oxygen O_2 reacts with=\frac{2}{5}\times {84}=33.6 moles of acetylene C_2H_2

Thus Oxygen is the limiting reagent as it limits the formation of products. Acetylene is excess reagent as it is present in excess.

2 moles of acetylene C_2H_2  produce= 4 moles of carbon dioxide CO_2.

33.6 moles of acetylene C_2H_2 produce=\frac{4}{2}\times {33.6}=67.2 moles of of carbon dioxide CO_2.


8 0
3 years ago
Read 2 more answers
suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a s
Tanya [424]

Answer:

  • <u>0.6826 (68.26%)</u>

Explanation:

<u>1) Find the z-scores:</u>

  • z = [X - μ ] / σ

a) z-score for 22.6 inches length

  • X = 22.6
  • μ = 20
  • σ = 2.6

  • z = [ 22.6 - 20 ] / 2.6 = 1.00

b) z-score for 17.4 inches length

  • X = 17.4
  • μ = 20
  • σ = 2.6

  • z = [ 17.4 - 20 ] / 2.6 =  - 1.00

<u>2) Probability</u>

Then, you have to find the probability that the length of an infant is between - 1.00 and 1.00 standards deviations (σ) from the mean (μ).

That is a well known value of 68%, which is part of the 68-95-99.7 empirical rule.

The most exact result is obtained from tables and is 68.26%:

  • 1 - P (z ≥ 1.00) - P (z ≤ - 1.00) = 1 - 0.1587 - 0.1587 = 0.6826 = 68.26%
5 0
3 years ago
Global warming is most closely associated with
Tatiana [17]

Answer:

Increases in the frequency of intense rainfall,

Decreases in snow cover and sea ice,

More frequent and intense heat waves,

Rising sea levels, and.

Widespread ocean acidification.

Explanation:

4 0
2 years ago
Read 2 more answers
Number 6<br><br><br><br> Yususueudidididifididi
Furkat [3]
The answer is predict, because it fits, and because someone can predict the outcome of something.
6 0
3 years ago
Other questions:
  • What is the mass in milligrams of 4.30 moles of sodium?use âeâ for âÃ10" and use significant figures?
    5·1 answer
  • When a sample of ca(s) loses 1 mole of electrons in a reaction with a sample of o2(g) the oxygen?
    7·2 answers
  • Which of the following is a method of purifying water? A. Aeration B. Combustion C. Fixation D. Freezing
    12·2 answers
  • Which element would most likely have a positive electron affinity
    6·1 answer
  • Volaic cells produce a positive overall charge what does this indicate
    12·1 answer
  • Carbon dioxide (CO2) is the gas that is mainly responsible for global warming (the greenhouse effect). The burning of fossil fue
    13·1 answer
  • What is the freezing point (in c) of a 1.56 m aqueous solution of CaCl2? (Report amount to three decimal points)
    13·1 answer
  • What is the weight of a rock that has a mass of 5.0 kg ?
    15·1 answer
  • Methods of Heat Transfer
    11·1 answer
  • On easter island what was the primary ecological disaster and why did<br> the people not prevent it?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!