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Vilka [71]
3 years ago
12

What is the IMA of the 1 st class lever in the graphic given? 2 3 0.5

Chemistry
2 answers:
Rainbow [258]3 years ago
7 0

Answer:

IMA = 2

Explanation:

IMA= din/dout

IMA= 3/1.5

IMA= 2

Zina [86]3 years ago
6 0

Answer:

I believe the answer isT 2.

Explanation:

he formula for IMA of a first-class lever is effort-distance/resistance-distance.

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How many grams of oxygen are there in 45.7 grams of Ba(NO2),?
Flauer [41]
I’m assuming you mean barium nitrite, Ba(NO2)2.

First convert grams of Ba(NO2)2 to moles using the molar mass of Ba(NO2)2. Then use the mole ratio of 4 moles of oxygen per 1 mole of Ba(NO2)2 to convert to moles of oxygen. Then use the molar mass of oxygen to convert to grams of oxygen.

45.7 g Ba(NO2)2 • 1 mol Ba(NO2)2 / 229.35 g Ba(NO2)2 • 4 mol O / 1 mol Ba(NO2)2 • 16.0 g O / 1 mol O = 12.8 g oxygen
4 0
2 years ago
Sucralfate (molecular weight: 2087 g/mol) is a major component of Carafate®, which is prescribed for the treatment of gastrointe
dybincka [34]

Answer:

Option b. 0.048 M

Explanation:

We have the molecular weight and the mass, from sulcralfate.

Let's convert the mass in g, to moles

1 g . 1 mol / 2087 g = 4.79×10⁻⁴ moles.

Molarity is mol /L

Let's convert the volume of solution in L

10 mL . 1L/1000 mL = 0.01 L

4.79×10⁻⁴ mol / 0.01 L = 0.048 mol/L

3 0
3 years ago
The equilibrium: 2 NO2(g) \Longleftrightarrow⇔ N2O4(g) has Kc = 4.7 at 100ºC. What is true about the rates of the forwar
Sergeeva-Olga [200]

Answer:

  • Initial: forward rate > reverse rate
  • Equilibrium: forward rate = reverse rate

Explanation:

2NO₂(g) → N₂O₄(g)   Kc=4.7

The definition of <em>equilibrium</em> is when the forward rate and the reverse rate are <em>equal</em>.

Because in the initial state there's only NO₂, there's no possibility for the reverse reaction (from N₂O₄ to NO₂). Thus the forward rate will be larger than the reverse rate.

7 0
3 years ago
Which of the following ions/atoms has the smallest radius?
Anna11 [10]

Answer:

B I believe im sorry if it's not right

8 0
2 years ago
Polyethylene is a synthetic polymer or plastic with many uses. 1.36 g of a polyethylene sample was dissolved in enough benzene t
trapecia [35]

Answer:

Molar mass = 1.111 × 10⁻⁵ g/mol

Explanation:

Given data:

Mass of polyethylene = 1.36 g

Volume = 100 mL   (0.1 L )

Pressure = 1.86 torr (1.86/760 = 0.003 atm)

Temperature = 25 °C = 25 °C + 273.15 = 298.15 K

Molar mass of polyethylene = ?

Solution :

PV =nRT

n = PV/RT

n = 0.003 atm × 0.1 L / 0.0821 atm. L . mol⁻¹ .k⁻¹  × 298.15 k

n = 0.0003 atm. L / 24.5 atm. L . mol⁻¹

n = 1.2245 × 10⁻⁵ mol

Molar mass = mass / number of moles

Molar mass = 1.36g / 1.2245 × 10⁻⁵ mol

Molar mass = 1.111 × 10⁻⁵ g/mol

3 0
3 years ago
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