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Greeley [361]
3 years ago
8

Sig figs chemistry help CHEMISTRY MATH IDK

Chemistry
1 answer:
Anna71 [15]3 years ago
4 0
The first one is 4. i cannot see the full operation of the rest.
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Why in a stream containing water, the mole fraction of a given
Rashid [163]

Answer:

A liquid, at any temperature, is in equilibrium with its own steam. This means that on the surface of the liquid or solid substance, there are gaseous molecules of this substance. These molecules exert a pressure on the liquid phase, a pressure known as vapor pressure.

In chemistry, when we talk about dry basis, we talk about a state in which the presence of water in a gaseous state is denied for the calculation. So vapor pressure equals zero.

When we talk about the wet basis, the presence of water in the steam is considered for the calculation, which normally is expressed as a percentage or moisture.

In summary, for a gas mixture steam:

  • For dry basis, we just have <em>component A, component B....</em>
  • For wet basis, we have <em>water vapor, component A, component B...</em>

So, in wet basis we have an extra component (water).

Assuming we only have 2 components in our steam, and being X the molar fraction of eact component:

  • For dry basis: Xa + Xb = 1................................. Xa = 1 - Xb
  • For wet basis: Xa + Xb + Xwater = 1 .............Xa = 1 - Xwater - Xb

For dry basis the mole fraction of A it is obtained by subtracting the molar fraction of B from one. And for wet basis, we have to substract the molar fraction of B <u>AND </u>the molar fraction of water vapor. So, logically, the mole fraction Xa will be less for wet basis.

6 0
3 years ago
A fuel tank has a width of 18 inches, a height of 11 inches and a depth of 5 inches. What is the volume of the tank in m3
cupoosta [38]

Answer:

0.016 m³

Explanation:

Step 1: Given data

Width of the tank (w): 18 in

Height of the tank (h): 11 in

Depth of the tank (d): 5 in

Step 2: Calculate the volume of the tank in in³

The fuel tank is a cuboid. We can calculate its volume using the following expression.

V = w × h × d

V = 18 in × 11 in × 5 in

V = 990 in³

Step 3: Convert 990 in³ to m³

We will use the relationship 1 m³ = 61023.7 in³.

990 in³ × (1 m³ / 61023.7 in³) = 0.016 m³

6 0
3 years ago
Compound A, C7H13Br, is a tertiary alkyl bromide. On treatment with CH3CH2ONa, A is converted into B, C7H12. Ozonolysis of B wit
blsea [12.9K]

Answer:

Compound A:    1-bromo-1-methylcyclohexane

Compound B:     1-methylcyclohex-1-ene

Explanation:

In this question, we can start with the <u>I.D.H</u> (<em>hydrogen deficiency index</em>):

I.D.H~=~\frac{(2C)+2+(N)-(H)-(X)}{2}

In the formula we have 7 carbons, 13 hydrogens, and 1 Br, so:

I.D.H~=~\frac{(2*7)+2+(0)-(13)-(1)}{2}=1

We have an <u>I.D.H value of one</u>. This indicates that we can have a <u>cyclic structure or a double bond</u>.

We have to keep in mind that the Br atom must be bonded to a t<u>ertiary carbon</u>. <u>We can not have a double bond</u> because in the ozonolysis reaction we have only <u>1 product</u>, therefore, we can not have a double bond in the initial molecule (if we have a double bond in the initial molecule we will have more than 1 product in the ozonolysis reaction).

With this in mind, we will have a <u>cyclic structure</u>. If we have 7 carbons and we need a tertiary alkyl halide. We can have a cyclic structure of 6 members and a methyl group bonded to a carbon that also is bonded to a Br atom <u>(1-bromo-1-methylcyclohexane).</u>

In the reaction with CH_3CH_2ONa we will have an <u>elimination reaction</u>. In other words, we have the production of a double bond inside of the cyclic structure <u>(1-methylcyclohex-1-ene)</u>.

See figure 1 for further explanations.

I hope it helps!

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How is the water in hydrothermal vents heated
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By hot springs, fumaroles and geysers.
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while in absence of oxygen which called Anaerobic conditions pyruvic acid is converted into Lactic acid to avoid accumulation of NADH⁺ which inhibit glycolysis and provide NAD⁺ required for glycolysis  
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