Ask question

Ask question

All categories

3 years ago

11

A group of students is playing tug-of-war. The students on both sides of the rope are tired, but the team on the left begins to

pull the rope towards their side. Which of the force diagrams below correctly represents what is happening? O o 1 O -

1 answer:

lilavasa [31]3 years ago

5 0

Answer:

2nd option is correct .

Explanation:

beacuse the force applied by the team on Right is quite less as they're tired.

You might be interested in

When non metals form ions what ions do they tend to form?

Maurinko [17]

Non-metals have a larger number of outer electrons called valence electrons. Therefore, it is easier for them to "steal" valance electrons from other elements with fewer valence electrons(usually metals)

For example, Chlorine(Cl) has 7 ve-. When forming an ion it will steal one electron from a metal. and gain a charge of -1. Because the ion is NEGATIVELY charged, it will be called an anion.

Nonmetals form anions.

Vocab:
cation: Paws-itively charged ions (get it? because its a CAT ion?)
anion: negatively charged ions

3 0

4 years ago

Whitney's lung capacity was measured as 3.3 l at a body temperature of 37 ∘c and a pressure of 746 mmhg . how many moles of oxyg

myrzilka [38]

the ideal gas equation is PV=nRT
where P=pressure
V=Volume
n=no. of moles
R=universal gas constant
T=temperature
The universal gas constant (R) is 0.0821 L*atm/mol*K
a pressure of 746 mmhg =0.98 atm= 1 atm (approx)
T=37 degrees Celsius =37+273=310 K (convert it to Kelvin by adding 273)
V=0.7 L (only getting oxygen, get 21% of 3.3L)
Solution:
(1 atm)(0.7 L)=n(0.0821 L*atm/mol*K)(310 K)
0.7 L*atm=n(25.451 L*atm/mol)
n=0.0275 mole
Answer:
n=0.0275 mole of oxygen in the lungs.

4 0

3 years ago

The partial pressure of N2 in a mixture of gases, where the total pressure is 1.50 atm, is 300. torr. What is the mole fraction

makvit [3.9K]

Answer:

The mole fraction of N₂ is 0.26.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

PT = PA + PB

This relationship is due to the assumption that there are no attractive forces between the gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present.

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

PA = XA * PT

In this case:

PA= PN₂= 300 torr
XA=XN₂= ?
PT= 1.50 atm= 1140 torr (being 1 atm= 760 torr)

Replacing:

300 torr= XN₂*1140 torr

Solving:

$X_{N_{2} } =\frac{300 torr}{1140 torr}$

XN₂= 0.26

<u><em>The mole fraction of N₂ is 0.26.</em></u>

6 0

3 years ago

Which statement defines calorimetry

m_a_m_a [10]

I can't answer the question without the statements but I can tell you Calorimetry means measuring amounts of heat released or received during a chemical reaction.

7 0

3 years ago

Read 2 more answers

15. What are the outer electrons of an atom that have to ability to create<br> chemical bonds? *

suter [353]

Answer:

valence electron

Explanation:

mark it as brainliest and plz follow me

8 0

3 years ago