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3 years ago

Which element has properties most similar to Bromine? A) F B) Kr C) S D) Se

Chemistry

2 answers:

Stells [14]3 years ago

7 0

Fluorine (F) will have properties similar to Bromine (Br) because it belongs to the same group as Bromine.

mezya [45]3 years ago

3 0

The correct answer is flourine

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If 5.0 liters H2 (g) at STP is heated to a temperature of 985, pressure remaining constant, the new volume of the gas will be?

vlada-n [284]

Answer:

$V_2=18 \ L \ H_2$

General Formulas and Concepts:

Chemistry - Gas Laws

STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K
Charles' Law: $\frac{V_1}{T_1} =\frac{V_2}{T_2}$

Explanation:

Step 1: Define

Initial Volume: 5.0 L H₂ gas

Initial Temp: 273 K

Final Temp: 985 K

Final Volume: ?

Step 2: Solve for new volume

Substitute: $\frac{5 \ L \ H_2}{273 \ K} =\frac{x \ L \ H_2}{985 \ K}$
Cross-multiply: $(5 \ L \ H_2)(985 \ K) = (x \ L \ H_2)(273 \ K)$
Multiply: $4925 \ L \ H_2 \cdot K = 273x \ L \ H_2 \cdot K$
Isolate x: $18.0403 \ L \ H_2 = x$
Rewrite: $x=18.0403 \ L \ H_2$

Step 3: Check

We are given 2 sig figs as the smallest. Follow sig fig rules and round.

$18.0403 \ L \ H_2 \approx 18 \ L \ H_2$

5 0

3 years ago

Complete the following reaction. 14/7 N + 1/0 n —> blank/blank C+1/1 H

Nataly_w [17]

Answer:

14/6

Explanation:

U 2 can help me by marking as brainliest........

8 0

2 years ago

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Which two types of consumers are known as “nature’s clean-up crew”? Why are they important?

NeTakaya

Fungus: Important because it breaks up several dead leaves, particles, etc, and puts nutrients back in the ground.

Carnivores: eat dead animals, no stinky rotten meat around.

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3 years ago

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How many moles of magnesium are in 35g of magnesium?

maksim [4K]

35g Mg x 1mol / 24g = 840 mol

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3 years ago

What occurs when a magnesium atom becomes a magnesium ion?

IgorLugansk [536]

The atom then has more protons than electrons and so it will be positively charged, a positive ion. Example: A magnesium atom may lose two electrons and become a Mg2+ ion. Non-metal atoms may gain electrons and become negatively charged. ... (It loses two electrons.)

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3 years ago