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Sauron [17]
3 years ago
12

How many significant figures are in the value 0.00250 m?

Chemistry
1 answer:
velikii [3]3 years ago
3 0

Answer:

3 significant figures

Explanation:

Significant figures:

1) The given measurement have four significant figures 1234.

2)  All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

3) Zero between the non zero digits are consider significant like 104 consist of three significant figures.

4)  Leading zeros are not consider as a significant figures. e.g. 0.07 in this number only one significant figure present which is 7.  

5) The zeros at the right side e.g 2600 are also significant. There are four significant figures are present.

In given measurement (0.00250 m) number of significant figures are 3.

2,5 and 0

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In water solution, the conjugate base of HF is __________
anastassius [24]

Answer:

The correct answer is : F^-

Explanation:

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.

Acid after donating protons changes into conjugate base and base after accepting protons changes into conjugate acid.

So, when HF in water reacts, it form fluoride ions and hydronium ions. The recation is given as:

HF+H_2O\rightarrow F^-+H_3O^+

Here, HF is acting as a  Bronsted Lowry acid by donating proton and forms it conjugate base F^-, Where as water is acting as a  Bronsted Lowry base by accepting a proton and forms its conjugate acid H_3O^+.

5 0
4 years ago
How many liters are there in 3.0 moles of CO2 at STP?
Lerok [7]

There are 67.2 liters of CO2 at STP

<h3>Further explanation</h3>

Given

3 mole of CO2

Required

Volume of CO2 at STP

Solution

Standard conditions for temperature and pressure are used as a reference in certain calculations or conditions

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

So for 3 moles :

= 3 x 22.4 L

= 67.2 L

8 0
3 years ago
What is the correct name for Au3N?
Serjik [45]

Answer: The correct answer is Gold (I) nitride.

Explanation:

Gold(I) Nitride Au3N Molecular Weigh.

3 0
4 years ago
What does chemical reaction describe
Flauer [41]
A chemical reaction (signs)

- rusting
- change in base of chemical
- for example lets say u mix two chemicals, and then it becomes a different new chemical (it changed from the inside) 

a physical

- a physical reaction is outer looks not inside.
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3 0
3 years ago
In an experiment, the molar mass of the compound was determined to be 118.084 g/mol. What is the molecular formula of the compou
pishuonlain [190]

Answer:

Succinic acid

Explanation:

The most common possibility is succinic acid

As it has decimals after whole no till hundredth it contains OH and C in most of the cases .

Let's check for succinic acid

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Yes approximately equal

Molecular formula is.

(CH_2)_2(CO_2H)_2

3 0
3 years ago
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