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alukav5142 [94]

4 years ago

14

What subatomic particle can be found in the nucleus?

2 answers:

m_a_m_a [10]4 years ago

7 0

Answer: protons

Explanation:

The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge.

34kurt4 years ago

6 0

Protons and neutrons can be found in the nucleus

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Name two traits of pseudoscience

lions [1.4K]

Pseudoscience refers to belief, theories and practices that claims to be scientific but which have no basis in scientific facts.
Pseudoscience has many traits two of which are:
1. It is based on dogma and uncritical belief. Counter evidence might draw hostility from pseudo scientists.
2. There is usually suppression or distortion of data. Pseudo scientists typically perform selective data gathering, in which they only gather and consider favorable data that support their claims. <span />

6 0

4 years ago

How are molecules built?

marin [14]

Answer:

By bonding due to the attractive forces

8 0

3 years ago

Please help with these two chemistry questions. Image attached.

mars1129 [50]

The answers for the following questions is answered below.

Therefore the volume of a gas is 22.4 L

<u>Therefore the number of moles of oxygen are 2.37 moles</u>

Explanation:

1. Given:

no of molecules (n) = 6.023 × $10^{23}$

volume of gas at STP conditions (V) =22.4 liters

To solve:

Volume of gas (v)

We know;

$\frac{n}{N_{a} } =\frac{v}{V}$

$\frac{6.023 * 10^{23} }{6.023 * 10^{23} } =\frac{v}{22.4}$

1 × 22.4 = v

v =22.4 L

Therefore the volume of a gas is 22.4 L

2. Given:

volume of oxygen gas (v) = 53 L

Volume of gas at STP conditions (V) =22.4 L

To solve:

no of moles of oxygen gas

We know;

$n =\frac{v}{V}$

n = $\frac{53}{22.4}$

n =2.37 moles

<u>Therefore the number of moles of oxygen are 2.37 moles</u>

<u></u>

6 0

3 years ago

According to kelper, which planet travels the fastest.

damaskus [11]

It’s probably Mercury I’m not sure

6 0

3 years ago

A solution is prepared by mixing 525 mL of ethanol with 597 mL of water. The molarity of ethanol in the resulting solution is 8.

Alenkinab [10]

Answer:

$\Delta V = 234.736\,mL$

Explanation:

The quantity of moles of ethanol in the solution is:

$n_{C_{2}H_{5}OH} = \left(\frac{597\,mL}{1000\,mL} \right)\cdot \left(8.35\,\frac{mol}{L} \right)$

$n_{C_{2}H_{5}OH} = 4.985\,mol$

The mass and volume of ethanol in the solution are, respectively:

$m_{C_{2}H_{5}OH} = (4.985\,mol)\cdot \left(46.07\,\frac{g}{mol} \right)$

$m_{C_{2}H_{5}OH} = 229.658\,g$

$V_{C_{2}H_{5}OH} = \frac{229.658\,g}{0.7893\,\frac{g}{mL} }$

$V_{C_{2}H_{5}OH} = 290.964\,mL$

The difference between the total volume of water and ethanol mixed to prepare the solution and the actual volume of solution is:

$\Delta V = (525\,mL+597\,mL) - (597\,mL + 290.964\,mL)$

$\Delta V = 234.736\,mL$

8 0

3 years ago