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Snowcat [4.5K]
3 years ago
13

Will give brainliest, Look at the graph above. Compare it to the periodic table. What do you notice about the location on the pe

riodic table of the elements that represent the high points

Chemistry
1 answer:
Tatiana [17]3 years ago
3 0

Answer:

We can see that the atomic radius decreases across every row.

Explanation:

I will comment more below.

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What is the difference between a hydrogen ion and a hydroxide ion?
Sophie [7]

Answer:

there is some difference

Explanation:

hydrogen ion --

symbol-H

Charge- 1+ or 1-

it is atom

hydroxide ion --

symbol- OH

charge-. -1

contains.- one oxygen atom and one hydrogen atom.

they are bonded.

it is a molecule

5 0
3 years ago
A sample of an unknown metal has a mass of 120.4 g. As the sample cools from 90.5°C to 25.7°C, it releases 7020 J of energy. Usi
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Answer:

Explanation:

sheesh i wouldn’t know

6 0
3 years ago
A major component of gasoline is octane (C8H18). When octane is burned in air, it chemically reacts with oxygen gas (O2) to prod
Olin [163]

Answer:

The answer is 6.25g.

Explanation:

First create your balanced equation. This will give you the stoich ratios needed to answer the question:

2C8H18 + 25O2 → 16CO2 + 18H2O

Remember, we need to work in terms of NUMBERS, but the question gives us MASS. Therefore the next step is to convert the mass of O2 into moles of O2 by dividing by the molar mass:

7.72 g / 16 g/mol = 0.482 mol

Now we can use the stoich ratio from the equation to determine how many moles of H2O are produced:

x mol H2O / 0.482 mol O2 = 18 H2O / 25 O2

x = 0.347 mol H2O

The question wants the mass of water, so convert moles back into mass by multiplying by the molar mass of water:

0.347 mol x 18 g/mol = 6.25g

8 0
4 years ago
Read 2 more answers
What is the relationship between density and viscosity?
PolarNik [594]

Answer:There is no relationship between the viscosity and density of a fluid. While viscosity is the thickness or thinness of a fluid, density refers to the space between its particles. However, both properties are affected by temperature. When a fluid is heated, its particles move far apart, and it also becomes less viscous.

5 0
4 years ago
3. If the sun heats my car from a temperature of 20.0 C to a temperature of 55° C, what will the
Katyanochek1 [597]

Answer:

I would try but i just need points good luck tho

5 0
3 years ago
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