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4 years ago

What increases the concentration of OH ions

Chemistry

1 answer:

Sliva [168]4 years ago

6 0

Answer:

Explanation: By adding base to a solution increases concentration of OH ions.

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Choose the correct setup for calculating the mass

expeople1 [14]

Answer : A

Explanation:

Answer A is correct I just did the assignment.

5 0

4 years ago

3. A gram food sample is burned completely in a calorimeter that contains 1000. of water The temperature of the water increases

lidiya [134]

The food has 23629.64 cal

<h3>Further explanation</h3>

Given

mass = 1000 g of water

temperature increases 23.65 * C

Required

The energy of the food

Solution

Heat absorbed by water :

Q = m . c . Δt

Q = 1000 g x 4.184 J/g°C x 23.65 °C

Q = 98951.6 J

1 Joules = 0.2388 Calories

98951.6 J = 23629.64 cal

3 0

3 years ago

A sample of cobalt has a mass of 27 g and a density of 9 g/cm^3. What would be its volume?

8_murik_8 [283]

Given ,

Mass of sample of cobalt = 27 g

density of sample of cobalt = 9g/cm^3

We know that ,

Density = mass of sample/volume of sample

From that relation ,

We can deduce the following as

Volume = mass of sample/density of sample

Hence , required volume of sample of cobalt = 27 g /9 g/cm^3 = 3 cm^3

The volume is $\fbox{3cm cube}$

3 0

3 years ago

PLSSS HELP

blondinia [14]

Answer: With each input, there is an output, a recipe requires certain ingredients, and certain amounts of each. A recipe calls for measurements, missing something can ruin it, just like a chemical formula, take something out or add something else, you get something completely different. when putting things together to make something you have to make sure what your putting in, will give you the product you want as the output.

Explanation:

8 0

3 years ago

Which identifies that a chemical reaction has occured ?

MaRussiya [10]

I believe the answer is A. im not to sure though hoped this helped!

8 0

3 years ago