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4 years ago

The world has more nuclear bombs now then it's ever had before. a. True b. False

Chemistry

2 answers:

valina [46]4 years ago

7 0

Answer: true

Explanation:

If even a few of the worlds most potent bombs were to be launched, the world would end very quickly.

lawyer [7]4 years ago

4 0

Answer is A) true
thank me later:)

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The state of matter for an object that has both definite volume and definite shape is

Romashka-Z-Leto [24]

The state of matter for an object that has both definite volume and definite shape is solid.

3 0

4 years ago

The average molecular speed in a sample of Ar gas at a certain temperature is 391 m/s. The average molecular speed in a sample o

adoni [48]

Answer:

550 m/s

Explanation:

The average molecular speed (v) is the speed associated with a group of molecules on average. We can calculate it using the following expression.

$v = \sqrt{\frac{3 \times R \times T}{M} }$

where,

R: ideal gas constant

T: absolute temperature

M: molar mass of the gas

We can use the info of argon to calculate the temperature for both samples.

$T = \frac{v^{2} \times M}{3 \times R} = \frac{(391m/s)^{2} \times 39.95g/mol}{3 \times 8.314J/k.mol} = 2.45 \times 10^{5} K$

Now, we can use the same expression to find the average molecular speed in a sample of Ne gas.

$v = \sqrt{\frac{3 \times R \times T}{M} } = \sqrt{\frac{3 \times (8.314J/k.mol) \times 2.45 \times 10^{5}K }{20.18g/mol} } = 550 m/s$

7 0

3 years ago

Which statement supports Newton's first law of motion?

taurus [48]

The answer is the last option

8 0

4 years ago

Read 2 more answers

Does changing the number of neutrons change the identity of the element you have built?

Alina [70]

Answer:<em>if u change the number of neutrons u will .get an isotope of the same element. </em>

Explanation: <em>neutron can make an atom radioactive</em>

5 0

3 years ago

What is the amount in moles 3.40 g Zn

Sidana [21]

<h3>Answer:</h3>

0.0520 mol Zn

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

3.40 g Zn

<u>Step 2: Identify Conversions</u>

Molar Mass of Zn - 65.39 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 3.40 \ g \ Zn(\frac{1 \ mol \ Zn}{65.39 \ g \ Zn})$
Divide: $\displaystyle 0.051996 \ mol \ Zn$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.051996 mol Zn ≈ 0.0520 mol Zn

3 0

3 years ago