All categories

3 years ago

Evaluate each scenario described to determine the direction of heat flow.

Chemistry

1 answer:

lana66690 [7]3 years ago

6 0

Answer:Tap water to ice cube

Explanation:

You might be interested in

How many atoms are present in 8.00g of He?

uranmaximum [27]

Answer:

1.20 × 10²⁴ atoms He

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

8.00 g He

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of He - 4.00 g/mol

Step 3: Convert

$8.00 \ g \ He(\frac{1 \ mol \ He}{4.00 \ g \ He} )(\frac{6.022 \cdot 10^{23} \ atoms \ He}{1 \ mol \ He} )$ = 1.2044 × 10²⁴ atoms He

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.2044 × 10²⁴ atoms He ≈ 1.20 × 10²⁴ atoms He

3 0

3 years ago

The diagram below shows the different phase transitions that occur in matter.

Eva8 [605]

The speed of molcules in gas mood are more than liquide

6 0

3 years ago

The net ionic equation for the reaction between aqueous solutions of hf and koh is ________.

choli [55]

Answer:

The net ionic equation for the reaction between aqueous solutions of hf and koh is H⁺ + OH⁻ → H₂O (l)

Explanation:

This is the complete reaction:

HF (aq)+ KOH (aq) → KF (aq) + H₂O (l)

Hydrofluoric acid dissociates according to this equation:

HF → H⁺ + F⁻

And we get protons plus fluorides.

Sodium hydroxide dissociates into:

KOH → K⁺ + OH⁻

potassium cation and hydroxyls.

First of all, the aqueous compounds must be separated into their ions.

Aqueous are the only one, you can break apart.

Don't forget to establish solubility in the compounds. For this case no one is soluble in water.

We make the complete ionic equation with all the aqueous compounds:

H⁺ + F⁻ + K⁺ + OH⁻ → F⁻ + K⁺

and afterwards, cancel the ions that are repeat on reactant and product sides. This are the spectator ions.

As we eliminate F⁻ + K, the net ionic equation will be:

H⁺ + OH⁻ → H₂O (l)

7 0

3 years ago

In order to digest food, the human body requires

ella [17]

Most substances in the food we eat need further digestion and must travel into the intestine before being absorbed. ... Chyme is then squirted down into the small intestine, where digestion of food continues so the body can absorb the nutrients into the bloodstream.

Hopes this helps:)

5 0

4 years ago

Food is taken in and broken down by the _______ system. The raw materials are then transported throughout the body by the ______

ruslelena [56]

Answer:

C. digestive; circulatory

Explanation:

It is the correct answer..

8 0

3 years ago