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3 years ago

Describe three similarities and one difference in the reactions of lithium and potassium with water.

1 answer:

4 0

I hope this helps you
THEY BOTH React violently with water
THEY Both: Give off heat 
THEY Both: Give off light 

Lithium will float on the water and become engulfed in flame and then die off, and Potassium will become engulfed in flames and then explode.

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Select all of the methods through which a drug can enter your body.

BartSMP [9]

all of the are correct!

8 0

2 years ago

Which of the following is an example of a change of state?

lord [1]

Answer:

Option B

Explanation:

For Option A the state is not changing but just has different look now.
For Option B the state is changing from gas to liquid drops due to cold glass
For Option C it hasn't changed state as both corn and flower is solid
For Option D paper and ash are both solids

Therefore our answer must be Option B

6 0

1 year ago

Is CaC1 a ionic , Polar covalant or non polar covalent ?

patriot [66]

Polar Covalent.

This is because both Calcium (Ca) and Carbon (C) are non metals, thus eliminating the ionic option.

It is polar covalent rather than nonpolar covalent due to the fact that the electrons in a polar covalent bond are shared unequally while those in a nonpolar bond are shared equally.

This can be determined by looking at the amount of valence electrons; if the electrons cancel each other out, it is shared equally. If not, it is shared unequally.

Hope this helps!

5 0

3 years ago

Where is the epicenter of this hypothetical earthquake?

Zolol [24]

Answer:

In fact, the epicenter of a hypothetical earthquake is located at the point where the earthquake begins to break. The epicenter is just above the surface of 'our planet'. The epicenter is what we call immediately above the 'hypocenter' of the earthquake on the stage that said surface.

Explanation:

6 0

2 years ago

Hydrogen and oxygen react chemically to form water how much water would form if 14.8grams of hydrogen reacted with 34.8 grams of

pishuonlain [190]

Answer:

There will be formed 39.1935 grams H2O formed

Explanation:

Step 1: The balanced equation

2H2 + 02 → 2H20

Step 2: Given data

mass of hydrogen = 14.8 grams

Molar mass of hydrogen = 2.02 g/mole

mass of oxygen = 34.8 grams

Molar mass of oxygen = 32 g/mole

Step 3: Calculate moles

moles = mass / Molar mass

moles of hydrogen = 14.8g/ 2.02 g/mole = 7.33 moles

moles of oxygen = 34.8g / 32g/mole = 1.0875 moles

For 2 moles hydrogen consumed, we need 1 mole of oxygen.

This means oxygen is the limiting reagens and will be consumed completely. Hydrogen is the reactant in excess, there will remain 5.155 moles of hydrogen

Step 4: Calculate moles of H2O

We see that for 2 moles of H2 consumed, there is needed 1 mole of O2, to produce 2 moles of H2O.

For 1.0875 moles of oxygen consumed, there will be produced 2.175 moles of H2O

Step 5: Calculate mass of water

Mass of H2O = moles of H2O * Molar mass of H2O

Mass of H2O = 2.175 moles * 18.02 g/moles 39.1935 grams

There will be formed 39.1935 grams H2O formed

4 0

3 years ago