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malfutka [58]
3 years ago
7

Help me please

Chemistry
2 answers:
gregori [183]3 years ago
8 0
This is enlargement since the new image has been enlarged twice the size of the original.

translation means it has moved
rotation means it turned another way
reduction means it got smaller
mixer [17]3 years ago
3 0

Answer:

C. Enlargement

Explanation:

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A large balloon contains 233 L of neon at 22.0C and 760. Torr. If the balloon ascends to an altitude where the temperature is -
shepuryov [24]

Answer: The volume in the balloon at the higher altitude is 260 L

Explanation:

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 760 torr

P_2 = final pressure of gas = 511 torr

V_1 = initial volume of gas = 233 L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 22.0^0C=(22.0+273)K=295K

T_2 = final temperature of gas = -52.0^0C=(-52.0+273)K=221K

Now put all the given values in the above equation, we get:

\frac{760\times 233}{295}=\frac{511\times V_2}{221}

V_2=260L

The volume in the balloon at the higher altitude is 260 L

3 0
3 years ago
How many kilojoules of heat would be required to fully melt a 0.834 m³ block of ice , provided that the density of ice is 917 kg
Lerok [7]

2.54 × 10⁵ kJ of heat are required to fully melt a 0.834 m³ block of ice, with a density of 917 kg / m³.

<h3>What is melting?</h3>

Melting is a physical change in which solids turn into liquids.

  • Step 1. Calculate the mass of ice.

We have a block of 0.834 m³ of ice with a density of 917 kg/m³.

0.834 m³ × 917 kg/m³ = 765 kg = 7.65 × 10⁵ g

  • Step 2. Convert 7.65 × 10⁵ g to moles.

We will use the molar mass of water.

7.65 × 10⁵ g × (1 mol/18,02 g) = 4.24 × 10⁴ mol

  • Step 3. Calculate the heat required to melt 4.24 × 10⁴ moles of water.

According to the thermochemical equation, 6.01 kJ are required to melt 1 mol of water.

4.24 × 10⁴ mol × (6.01 kJ/mol) = 2.54 × 10⁵ kJ

2.54 × 10⁵ kJ of heat are required to fully melt a 0.834 m³ block of ice, with a density of 917 kg / m³.

Learn more about melting here: brainly.com/question/40140

#SPJ1

8 0
2 years ago
Uses of baking powder​
NARA [144]

Baking powder is used to increase the volume and lighten the texture of baked goods. It works by releasing carbon dioxide gas into a batter or dough through an acid–base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture.

7 0
3 years ago
Read 2 more answers
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
How would you choose an indicator for titrating a strong acid with a strong base?​
Paha777 [63]
A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10.
6 0
3 years ago
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