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4 years ago

What is an ion (1 mark) what is the charge on a chloride ion (1 mark) what is an ionic bond (1 mark)

Chemistry

2 answers:

Komok [63]4 years ago

8 0

Answer:

An ion is a positively or negatively charged atom formed by losing or gaining of electrons.

Chloride ion has a charge of -1

Ionic bond is the bond formed by cation and anion

amm18124 years ago

7 0

An ion is an atom with a different number of electrons than its number of proton, the charge of an ion is not net

need more information to find the charge but it can't be 0 if it is an ion

an ionic bond is when 2 or more ions attract negative and positive

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List two adaptations the cave glow worm has for capturing prey in a cave

Delicious77 [7]

Answer:true

Explanation:

List two adaptations the cave glow worm has for capturing prey in a cave. droos a line of silk to trap palle - silk comes from glands in the mouth. a produces light to lure pret a insects are drawn towards light and get trapped in 3.

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3 years ago

Please can someone explain the differences in variables (e.g. control variable, Independent variable and Dependent variable). I

7nadin3 [17]

Answer:

Independent Variable: The thing in an experiment which is changed.

Dependent Variable: The thing in an experiment which is affected by the change. (In other words, it's affected by the independent variable.)

Control Variable: The other factors of the experiment that remain unchanged.

For example, say you want to do an experiment about the effects of water on plant height. So, the independent variable, or the thing that is changed would be the amount of water, and the dependent variable would be the plant height, as the plant height is directly affected by the independent variable. Lastly, for this to be a fair experiment, there must be control variables. For example, all of the plants should be put in a room with equal temperature, they should get the same amount of sunlight, etc.

I hope this answers your question- feel free to ask me if you need any more help.

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3 years ago

Read 2 more answers

Is the air that we breathe an element, compound, mixture, or pure substance?

ddd [48]

The answer is mixture

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3 years ago

The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for t

kotykmax [81]

Answer:

Explanation:

We are given that ammonia can be produced from hydrogen gas and nitrogen gas according to the equation:

$\displaystyle 3\text{H$_2$} + \text{N$_2$} \longrightarrow 2\text{NH$_3$}$

We want to determine the mass of hydrogen gas that must have reacted if 0.575 g of NH₃ was produced.

To do so, we can convert from grams of NH₃ to moles of NH₃, moles of NH₃ to moles of H₂, and moles of H₂ to grams of H₂.

We are given that the molar masses of NH₃ and H₂ are 17.03 g/mol and 2.0158 g/mol, respectively.

From the equation, we can see that two moles of NH₃ is produced from every three moles of H₂.

With the initial value, perform dimensional analysis:

$\displaystyle \begin{aligned} 0.575\text{ g NH$_3$}& \cdot \frac{1\text{ mol NH$_3$}}{17.03\text{ g NH$_3$}} \cdot\frac{3\text{ mol H$_2$}}{2\text{ mol NH$_3$}} \cdot \frac{2.0158\text{ g H$_2$}}{1\text{ mol H$_2$}} \\ \\ & = 0.102\text{ g H$_2$}\end{aligned}$

*Assuming 100% efficiency.

Our final answer should have three significant figures. (The first term has three, the second term has four (the one is exact), the third term is exact, and the fourth term has five. Hence, the product should have only three.)

In conclusion, our answer is B.

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3 years ago

When the Moon blocks out the Sun in a solar eclipse, we can still see the

Mashutka [201]

We can still see the shadow of the Earth and/or Earth's surface.

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3 years ago