3 years ago

OMG PLEASE HELP. WILL MARK U BRAINLIEST IF YOU ANSWER ALL 3 QUESTIONS. THANKS SO MUCH.

Chemistry

1 answer:

Readme [11.4K]3 years ago

4 0

1.) Moe will feel pain and he will see one side go to the right and disappear

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Practice Problem #2: How many atoms of Ba are in 7.8 moles of Ba?

andriy [413]

$7.8 \: mol = \frac{6.02 \times {10}^{23} atoms}{1 \: mol} = 4.6956 \times {10}^{24} \: atoms$

round as you wish.

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3 years ago

All amino acids have two ionizable groups (an alpha-amino group with pKa~9.3, and an alpha-carboxyl group with pKa~2.2). Lysine

raketka [301]

The answer will be 9.1 %

8 0

3 years ago

Who can help me with this? Asap

aivan3 [116]

Answer:

A. = 143

B. = 8

C. =32

Explanation:

Number of neutron = mass number - atomic number

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3 years ago

Which of the following is not a characteristic of a metal?

jolli1 [7]

Answer:

B. Poor conductor.

Explanation:

It cannot be A, as only 1 metal is not solid at room temp.

It cannot be C, as most metals are ductile.

It cannot be D, as most metals are malleable.

This leaves B, which is not true about metals, as a lot are very good conductors.

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2 years ago

What is the mass in kilograms of an object that weighs 50.0lbs?

Aleonysh [2.5K]

The amount of matter in an object is said to be its mass. The SI base unit of mass is kilograms i.e. $kg$ .

The mass of the object = $50.0 lbs$ (given)

For converting lbs to kg:

$1 lb = 0.453592 kg$

So, $50 lbs = 50\times 0.453592 kg = 22.6796 kg \simeq 22.68 kg$

Hence, the mass of $50.0lbs$ object in kilograms is $22.68 kg$ .

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3 years ago