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professor190 [17]
3 years ago
12

Choose the correct coefficients to balance the following equation:

Chemistry
2 answers:
makvit [3.9K]3 years ago
6 0

the correct answer is B

umka21 [38]3 years ago
5 0
B) 1 Zn+ 2HCl--> 1 ZnCl2+1H2 This is balanced
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1. The speed limit on most city streets is (25 miles). How many meters per minute
irina1246 [14]

Answer:

Speed = 670.56 \frac{m}{min}

Explanation:

Given

Speed = \frac{25 mi}{hr}

Required

Convert to meters per minutes

Speed = \frac{25 mi}{hr}

Start by converting the speed from miles to meters

1\ mile = 1609.34\ meters.

So, we have:

Speed = \frac{25 * 1609.34\ m}{hr}

Speed = \frac{40233.5\ m}{hr}

Next, we convert time from hours to minutes

1\ hour = 60\ minutes

So, we have:

Speed = \frac{40233.5\ m}{60\ min}

Speed = 670.56 \frac{m}{min}

<em>Hence, the equivalent of 25 miles per hour is 670.56 meters per minutes</em>

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3 years ago
Select the correct use of the compound tms in nmr spectroscopy.a. it is a signal-to-noise enhancerb. it is an internal standard
SpyIntel [72]

TMS stands for Tetramethylsilane

Formula : Si(CH₃)₄

It is used as internal standard for chemical shift

In TMS all the four methyl groups are similar thus all the 12 hydrogen are chemically equivalent. They will show proton NMR at same level and which will appear as a singlet.

We have defined this singlet to be as reference set as zero.

Generally the other organic compounds show chemical shift downfield.So have positive chemical shift with respect to TMS shift.

8 0
3 years ago
Calculate the oxidation number of “C” in CH3COCH3 please
Triss [41]

Answer:

The oxidation number of C (carbon) is +4

Explanation:

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3 years ago
Nitrogen gas plus hydrogen gas under pressure and at high temperature turns into ammonia. which of the chemical equations matche
nasty-shy [4]
Sorry if wrong .......

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Read 2 more answers
Which part of an atom is mostly empty space?
Brilliant_brown [7]
I’m pretty sure it’s B

Hope that helps

7 0
3 years ago
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