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
liberstina [14]
3 years ago
13

Jonathan is working in his basement on a science fair project when his little sister closes and locks the door. Jonathan wants t

o let his parents know that he is stuck down in the basement. He can either yell as loudly as he can, bang on the metal pipes, or bang on the concrete wall. Which should he do if he wants someone to hear him? Explain your answer, and explain why the other options would not be as effective.
Chemistry
1 answer:
jeyben [28]3 years ago
8 0

Answer:

i think its metal pipes

Explanation:

sorry if im wrong

You might be interested in
What other elements does iron commonly bonds with.
Neko [114]

☁️ Answer ☁️

annyeonghaseyo!

Your answer is:

it can bond with oxygen to form rust or iron oxide. and it can bond with carbon to form steel.

Here's another one: Iron bonds with lots of things: Oxygen (Ferric Oxide = rust),Chlorine (Ferric Chloride]), Fluorine, ... , even other Iron (in aMetallic Bond or crystal).

Hope it helps.

Have a nice day hyung/noona!~  ̄▽ ̄❤️

5 0
3 years ago
A purified protein has a molecular mass of 360 kDa when measured by size exclusion chromatography. When analyzed by gel electrop
Dimas [21]

Answer:

A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.

A disulfide bond links the two 80 kDa subunits (possibly identical).

Explanation:

Given that:

A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.

A disulfide bond links the two 80 kDa subunits (possibly identical).

As a result of SDS and dithiothreitol analysis treatment, the molecular masses can not be 360 in total. They are 280, which implies that they are in short of 80 kDa. This means that there are possibilities that two groups with a molecular mass of 80 kDa which are joined by a disulfide bond.

The presence of SDS and dithiothreitol acts as a reducing agent, and they can break disulfide bonds whose pH is greater than 7, i.e. those in basic condition.

4 0
3 years ago
What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?
steposvetlana [31]
STP condition mean we have P=1 atm. T=273K. R=ideal gas constant, but make sure you use the one that has the same units of pressure, temperature that you are using. In this case R=0.0821 L*atm K^-1mol^1. You are provided with n=2.1 moles.
V=nRTP
Input your values and solve.
3 0
4 years ago
What is the charge of the ions formed by Na and by Cl?
Alexxandr [17]

Answer:

Na+ is positively charged as it loses an electron

Cl- is negatively charged as it gains an electron

3 0
3 years ago
The nucleus of the atom is held together by the attraction of the positively charged protons and the negatively charged electron
7nadin3 [17]
False.........................
8 0
3 years ago
Other questions:
  • Q1. Calculate the amount of copper produced in 1.0 hour when aqueous CuBr2 solution was electrolyzed by using a current of 4.50
    15·1 answer
  • Which action is not an accomplishment of the Apollo missions?
    13·1 answer
  • What two molecules are compounds
    7·1 answer
  • A student fills her burette with NaOH to the 2.5 mL mark. She titrated her sample of the NaOH until she reaches the endpoint (i.
    6·1 answer
  • Calculate the molality of a 15.0% by mass solution of MgCl 2 in H 2O. The density of this solution is 1.127 g/mL. Group of answe
    7·1 answer
  • Calculate the total mass of the protons and electrons in 19 9F. Use 1.007825 amu as the mass of 11H (mass of a proton and an ele
    6·1 answer
  • Explain how changes in pressure affect the rate and yield of ammonia produced
    10·1 answer
  • A duck migrates South for the winter about 3000 miles each year. It takes them about 65 hours to travel this distance. What is t
    6·1 answer
  • How do molecules of butene form polybutene?
    12·1 answer
  • What % of original U238 remains after three half lives?<br> 1-50<br> 2-25<br> 3-12.5<br> 4-6.25
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!