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3 years ago

Coucouu besoin daide svp :)) merci davance☺

Chemistry

1 answer:

kondaur [170]3 years ago

5 0

Answer:

hmmmmmmm what? 2 + 2 = 22 :)

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How many grams of a 14.0% (w/w) sugar solution contain 62.5 of sugar?

Delicious77 [7]

Answer:

$m_{solution}=446.4g$

Explanation:

Hello,

In this case, by-mass percent is computed in terms of the mass of the solute and the mass of the solvent as shown below:

$\% m=\frac{m_{solute}}{m_{solution}} *100\%$

Thus, solving for the mass of the solution, we obtain:

$\frac{x}{y} m_{solution}=\frac{m_{solute}}{\% m}*100\%\\ \\m_{solution}=\frac{62.5g}{14.0\%}*100\% \\\\m_{solution}=446.4g$

Regards.

3 0

3 years ago

0005x0.002 into scientific notation

geniusboy [140]

0005 * 0.002 = 5 * 0.002 = 0.010 = 10^-2

7 0

3 years ago

Does the reaction of a main-group metal oxide in water produce an acidic solution or a basic solution? Write a balanced equation

Fynjy0 [20]

Answer: The main group metal produce a basic solution in water and the reaction is $MO+H_2O\rightarrow M(OH)_2$

Explanation:

Main group elements are the elements that are present in s-block and p-block.

The metals that are the main group elements are located in Group IA, Group II A and Group III A.

Oxides are formed when a metal or a non-metal reacts with oxygen molecule. There are two types of oxides which are formed: Acidic oxides and basic oxides.

Acidic oxides are formed by the non-metals.
Basic oxides are formed by the metals.

When a metal oxide is reacted with water, it leads to the formation of a base.

The general formula of the oxide formed by Group II-A metals is 'MO'

The chemical equation for the reaction of metal oxide of Group II-A and water follows:

$MO+H_2O\rightarrow M(OH)_2$

Hence, the main group metal produce a basic solution in water and the reaction is $MO+H_2O\rightarrow M(OH)_2$

4 0

3 years ago

A child is on a pogo stick. At the top of her jump, her kinetic energy (KE) = 0 J, her gravitational potential energy (GPE) = 10

krek1111 [17]

There would be 0 Potential energy, which eliminates A. There would be Spring energy, which eliminates C. So B and D are your 2 choices. Since the child is not moving just before the jump, there would be 0 Kinetic energy. So D.

7 0

3 years ago

Why is mining for coal a long-term concern?

Delvig [45]

Answer:

Explanation:

Coal is a non-renewable resource, so the supply can't produce faster than we can mine it.

8 0

2 years ago

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Coucouu besoin daide svp :)) merci davance☺​

Coucouu besoin daide svp :)) merci davance☺