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DiKsa [7]
2 years ago
6

on a trip to italy, Cheyne rented a car to tour the country. As he turned onto the highway, he noticed that the speed limit was

95 km/h. How fast can Cheyne drive im mph?
Chemistry
2 answers:
rjkz [21]2 years ago
8 0
 The answer is 59mph.
nata0808 [166]2 years ago
7 0
He can drive 59 miles per hour on the highway
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1.  You have 10 grams of HCl, how many moles of HCl do you have?  
Oxana [17]

Explanation:

36.5gm (Molar mass) = 1mole

1 gram = 1/36.5 mole

10grams =(1/36.5) x 10 moles

= 0.027 x 10 moles

=0.27moles

4 0
2 years ago
Why boiling point is more when vanderwall force if more?
jek_recluse [69]

Answer:

It is the intermolecular forces acting between the molecules that cause attractions between them making them liquids or solids. The strength of Van der Waals forces depends primarily on the number of electrons in total in the molecule, so larger molecules will have higher boiling points.

Explanation:

6 0
2 years ago
A sample of gas has a pressure of 742 torr. What is the pressure in atmospheres?
ycow [4]

Answer:742 torr= approximately 0.976 atm

Explanation:

Since we know that one atm= 760 torr, we can compute the following calculation:

(742 torr/1)*(1atm/760torr)=0.976316 atm

Remember sig figs (3) to round it to 0.976 atm

\frac{742 torr}{1}*\frac{1 atm}{760 torr}=0.976316=0.976 atm

(torr cancels out and we're left with atm)

Hope this helps :)

8 0
3 years ago
Is graph paper a homogeneous or heterogeneous mixture
labwork [276]

Answer:

There is no chemical symbol for paper since it is not an element but rather a mixture of several different compounds. Mixtures in two or more phases are heterogeneous mixtures.

Explanation:

4 0
3 years ago
Describe at least three ways our understanding of the atom has changed. See the hint in the reference image.
abruzzese [7]
The first model of the atom was developed by JJ Thomson in 1904, who thought that atoms were composed purely of negatively charged electrons.

This theory was then disproved by Ernest Rutherford and the gold foil experiment in 1911, where Rutherford shot alpha particles at gold foil, and noticed that some went through and some bounced back, implying the existence of a positive nucleus.

In 1926, the Austrian physicist Erwin Schrödinger created a quantum mechanical model of the atom by combining the equations for the behavior of waves with the de Broglie equation to generate a mathematical model for the distribution of electrons in an atom.
4 0
3 years ago
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