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3 years ago

1. In a chemical reaction

Chemistry

1 answer:

max2010maxim [7]3 years ago

4 0

Answer:

Explanation:

Law of conservation of matter

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How many mL can you make of a .225 M solution if you<br> have 458 mL of a .500 M solution available?

tigry1 [53]

Answer:225000 milliliters

Hope this helps.Sorry id you get this wrong

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4 years ago

If your weight is 120 pounds

denis23 [38]

Explanation:

Weight is 120 pounds and mass is 54 kg

The mass of an object is same everywhere. If we were on the moon, its mass will remain to be 54 kg.

Weight of an object is given by :

$W=m\times g$

g is acceleration due to gravity on that surface

For moon, it is 1/6 the gravitational force on Earth, g = 1.63 m/s²

1 pound = 4.45 N

It means my weight is 533.78 N

On the surface of Moon is will be :

$W=\dfrac{533.78}{1.63}\\W=327.47\ N$

5 0

4 years ago

Drag each tile tile to the correct location in the equation,each tile can be used more than once, but not all tile will, be used

grigory [225]

Answer:

2C2H2 + 5O2 -----> 4CO2 + 2H2O

Explanation:

The question is incomplete, but i manage to find one question similar to this, and the remaining part is:

C2H2 + O2 -----> CO2 + H2O

To balance the equation, we need to use the priority order to balance, which is the following:

Metals > non metals > Oxygen > Hydrogen

According to this, we have non metals, oxygen and hydrogen in the above equation, let's balance first the carbon. We have 2 carbons in the products, and 1 in the products, then, we just put a 2 there:

C2H2 + O2 -----> 2CO2 + H2O

Now, the number of carbon is balanced, but the number of oxygen was altered, let's see how much do we need. We have 5 oxygens in the products, and 2 in the reactants, we can put a 2 next to the water, so the sum of the oxygens in the products will be 6, and then, a 3 in the reactants:

C2H2 + 3O2 -----> 2CO2 + 2H2O

Putting that, will alter the number of hydrogens, so we need to balance that putting a 2 in the reactants; however this will alter again the number of carbons, so we must change the number in the products for the carbon, changing the 2 by a 4:

2C2H2 + 3O2 -----> 4CO2 + 2H2O

Finally, we can change the number of oxygens in the reactants, from 3 to 5, to balance the equation:

2C2H2 + 5O2 -----> 4CO2 + 2H2O

And this is the final balanced equation

5 0

3 years ago

Read 2 more answers

41. Plastic Bags Thin sheets of plastic are used to make

andrew11 [14]

Answer:

Promethium-147 changes into promethium-148.

Explanation:

Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

$_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta$

$_{147}^{61}\textrm{Pm}\rightarrow _{148}^{61}\textrm{Pm}+_{-1}^0\beta$

During beta decay promethium-147 changes to promethium-148.

7 0

4 years ago

Dustin is mixing concrete. A formula for concrete calls for 3/8 gal of water. Dustin wants to make 7/9 more concrete than the fo

slava [35]

We can use a ratio to solve this question. Lets refer to the amount formed by the formula as a serving
1 serving needs 3/8 gal
We want to create 7/9 servings extra, so
1 + 7/9 = 16/7
1 : 3/8
16/7 : x
1/(3/8) = (16/7) / x
8 / 3 = 16x / 7
x = 7/6
He needs to use 7/6 gallons of water.

5 0

3 years ago