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3 years ago

Please help me 30 pointsss dont guess please be sure

Chemistry

2 answers:

Paul [167]3 years ago

7 0

It is an acid I believe

nirvana33 [79]3 years ago

6 0

Answer:

Acid

Explanation:

;)

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Calculate the moles of 336 L of carbon dioxide gas (CO2) at STP.

fenix001 [56]

Answer:

14.99 mols of CO2

Explanation:

STP= 273 k , 1 atm , .0821 gas constant

N=PV/RT

N= 1x336/.0821x273

14.99 mols of CO2

659.6 grams of CO2

8 0

3 years ago

3. How many grams are in 9.015 x 1035 atoms of Cobalt?

pentagon [3]

Answer:

8.822 × 10¹³ g Co

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

9.015 × 10³⁵ atoms Co

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Co - 58.93 g/mol

Step 3: Convert

$9.015 \cdot 10^{35} \ atoms \ Co(\frac{1 \ mol \ Co}{6.022 \cdot 10^{23} \ atoms \ Co} )(\frac{58.93 \ g \ Co}{1 \ mol \ Co} )$ = 8.82189 × 10¹³ g Co

Step 4: Check

We are given 4 sig figs. Follow sig fig rules and round.

8.82189 × 10¹³ g Co ≈ 8.822 × 10¹³ g Co

3 0

3 years ago

Which statement about erosion is true? Most erosion occurs too slowly to observe. Most erosion occurs too quickly to observe, Er

olganol [36]

Answer:

Erosion can happen very quickly or very slowly.

e.g splash erosion occurs slowly while gulley erosion occurs very fast.

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3 years ago

Below is a picture of the inner workings of a lava lamp. It consists of a glass 1 point

nadya68 [22]

Heat within the asthenosphere creates convection currents (similar to the currents that can be seen in the lava lamp). These convection currents cause the tectonic plates to move several centimeters per year relative to each other.

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3 years ago

How could you tell if a sample of matter is an element

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Test it by checking it's hardness, texture, and how it stands against other substances.

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3 years ago