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2 years ago

What keeps an ionic bond held together?

Chemistry

2 answers:

andrew11 [14]2 years ago

6 0

Answer:

D. Attraction between oppositely- charged ions

Explanation:

I took the test

Schach [20]2 years ago

5 0

D) Attraction between oppositely-charged ions.

In ionic bonds, one atom is negatively charged, and one atom is positively charged. The positively charged atom gives its electrons, and the negatively charged atom receives the electrons--thus, the opposite charge attracts them to one another and holds them together. That simple.

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A girl has a weight of 450 N and her feet have a total area of 300Cm2

snow_tiger [21]

Answer:

15000N/m²

Explanation:

Given parameters:

Force exerted by the girl = 450N

Area = 300cm²

Unknown:

Pressure exerted by her feet =?

Solution:

Pressure is the force per unit area on a body;

Pressure = $\frac{force }{area}$

We need to convert the given area to m²;

10000cm² = 1m²

300cm² = $\frac{300}{10000}$ = 0.03m²

Pressure = $\frac{450}{0.03}$ = 15000N/m²

8 0

2 years ago

A material found in air, water, or soil that is harmful to humans or other organisms

UNO [17]

The answer is pollutant

3 0

2 years ago

WILL RECIEVE MEDAL!If 1.2 kilograms of rust form on a bridge in five days, what should be the rate of reaction in grams per hour

serious [3.7K]

Since the answer is in grams, kilograms must first be converted to grams. A kilogram is equivalent to 1000 grams. Therefore, multiply 1.2 kilograms by 1000 and you get 1,200 grams. Then, calculate the number of hours in 5 days. Each day is 24 hours and 24 hours multiplied by 5 days equals 120 hours. Lastly, since the answer is in grams per hour, divide 1,200 grams by 120 hours and the resultant rate of reaction is 10 g/hr.

8 0

2 years ago

If every oxygen ion (combined with an aluminum ion) has a charge of –2, what must the charge of each aluminum ion be? How can yo

Andrews [41]

Each aluminium ion should have a charge of +2, because the sum of oxidation numbers must be zero.

The uncharged aluminium atom must lose two electrons to become an ion with +2 charge.

If you find some mistakes in my answer, please let me know!

7 0

2 years ago

A lead–tin alloy of composition 30 wt% Sn–70 wt% Pb is slowly heated from a temperature of 150°C (300°F).(a) At what temperature

Novay_Z [31]

Answer:

a) 231.9 °C

b) 100% Sn

c) 327.5 °C

d) 100% Pb

Explanation:

This is a mixture of two solids with different fusion point:

$Tf_{Pb}=327.5 C$

$Tf_{Sn}=231.9 C$

Given that Sn has a lower fusion temperature it will start to melt first at that temperature.

So the first liquid phase forms at 231.9 °C and because Pb starts melting at a higher temperature, that phase's composition will be 100% Sn.

The mixture will be completely melted when you are a the higher melting temperature of all components (in this case Pb), so it will all in liquid phase at 327.5 °C.

At that temperature all Sn was already in liquid state and, therefore, the last solid's composition will be 100% Pb.

3 0

3 years ago