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2 years ago

Elements that are generally shiny when smooth and clean.

Chemistry

1 answer:

Verdich [7]2 years ago

5 0

Metals are elements that are generally shiny when smooth and clean

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How does the amount of carbon dioxide affect the rate of photosynthesis?

swat32

Answer:

An increase in the carbon dioxide concentration increases the rate at which carbon is incorporated into carbohydrate in the light-independent reaction, and so the rate of photosynthesis generally increases until limited by another factor.

Explanation:

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2 years ago

Read 2 more answers

A pan containing 40 grams of water was allowed to cool from a temperature of 91.0C. If the amount of heat repressed is 1,300 jou

Vinvika [58]

Answer:

83°C

Explanation:

The following were obtained from the question:

M = 40g

C = 4.2J/g°C

T1 = 91°C

T2 =?

Q = 1300J

Q = MCΔT

ΔT = Q/CM

ΔT = 1300/(4.2x40)

ΔT = 8°C

But ΔT = T1 — T2 (since the reaction involves cooling)

ΔT = T1 — T2

8 = 91 — T2

Collect like terms

8 — 91 = —T2

— 83 = —T2

Multiply through by —1

T2 = 83°C

The final temperature is 83°C

3 0

3 years ago

Lastly, Snape thinks we should try one more calculation. What is the retention factor if the distance travelled by the solvent f

bija089 [108]

Answer:

The retention factor of an ion is 0.10 .

Explanation:

Retention factor is defined as ratio of distance of distance traveled by solute to the distance traveled by solvent on chromatogram.

$R_f=\frac{d_{solute}}{d_{solvent}}$

We have:

$d_{solute}=d_{ion}=0.20 cm$

$d_{solven}=2.00 cm$

The retention factor of an ion :

$R_f=\frac{0.20 cm}{2.00 cm}=0.10$

7 0

2 years ago

How many atm are 12920 torr

Zinaida [17]

Answer:

17 atm

Explanation:

3 0

2 years ago

If oxygen with an electronegativity of 3.5 were to make a chemical bond with lithium, electronegativity of 1.0, what kind of bon

sergejj [24]

Answer:

Ionic.

Explanation:

Elements with higher electronegativity values are better at attracting electrons in a chemical bond.

A chemical bond is considered "ionic" if the electronegativity difference between the two bonding atoms is greater than $1.8$ .
Otherwise, this chemical bond is considered "covalent".

In this example, the difference between the electronegativity of oxygen and lithium is $3.5 - 1.0 = 2.5$ . Since $2.5 > 1.8$ , the bond between the two elements would likely be ionic.

It is possible to reach the same conclusion based on the fact that lithium is a metal while oxygen is a nonmetal. When metal elements react with non-metal elements, the product is typically an ionic compound- with ionic bonds between the atoms.

6 0

1 year ago