Light comes from A. Nerve impulses. B. Electrons. C. An object vibrating. D. Photons

What is the acceleration of a 50 kg object pushed with a force of 500 newtons?

son4ous [18]

Answer:

F = MA

500 = 50 multiply by A

A= 500/50

A= 10m/s2

3 0

3 years ago

In this experiment we will be using a 0.05 M solution of HCl to determine the concentration of hydroxide (OH-) in a saturated so

gulaghasi [49]

<u>Answer:</u> The moles of hydroxide ions present in the sample is 0.0008 moles

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is HCl.

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $Ca(OH)_2$

We are given:

$n_1=1\\M_1=0.05M\\V_1=16mL\\n_2=2\\M_2=?M\\V_2=36.0mL$

Putting values in above equation, we get:

$1\times 0.05\times 16=2\times M_2\times 36\\\\M_2=\frac{1\times 0.05\times 16}{2\times 36}=0.011M$

To calculate the moles of hydroxide ions, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

Molarity of solution = 0.011 M

Volume of solution = 36.0 mL

Putting values in above equation, we get:

$0.011=\frac{\text{Moles of }Ca(OH)_2\times 1000}{36}\\\\\text{Moles of }Ca(OH)_2=\frac{0.011\times 36}{1000}=0.0004mol$

1 mole of calcium hydroxide produces 1 mole of calcium ions and 2 moles of hydroxide ions.

Moles of hydroxide ions = (0.0004 × 2) = 0.0008 moles

Hence, the moles of hydroxide ions present in the sample is 0.0008 moles

8 0

3 years ago

What characterizes a strong acid or base? complete ionization in water polar covalent bonding presence of a hydroxide or hydroge

Natasha2012 [34]

1. Complete ionization in water.

2. Ionization constant.

3. A good hydrogen-ion acceptor.

4. Weak acid.

5. This base ionizes slightly in aqueous.

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7 0

3 years ago

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Give the chemical symbol of an element in the third period (row) of the periodic table with two 3s electrons and no 3p electrons

lidiya [134]

Answer:

Mg

Explanation:

The element in the third row with two 3s electrons and no 3p electrons is magnesium — Mg.

3 0

3 years ago

Which of the following extends the furthest away from us?

vlada-n [284]

Answer:

A

Explanation:

The galaxy is the biggest thing and we're inside of it and the solar system is inside of it and inside the solar system is Jupiter and Tampa is on earth

5 0

3 years ago

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