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3 years ago

In a balanced reaction NH3+ H2O—> NH3OH how many hydrogens atoms are gained in the reaction

Chemistry

1 answer:

sergiy2304 [10]3 years ago

8 0

There is no hydrogen gained it is a combination reaction

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If we have any substance it can be concluded that a chemical change has happened if

Nadusha1986 [10]

Answer:

You cannot reverse the effects.

Explanation:

In physical changes you can usually reverse the effects for example if ice melts you can just refreeze it. But it's impossible to reverse a chemical change such as a rusted bike.

7 0

3 years ago

Chalcopyrite, the principal ore of copper (Cu), contains 34.63 percent Cu by mass. How many grams of Cu can be obtained from 7.3

DENIUS [597]

Answer:

$2.55\times 10^{6}g$ Cu can be obtained from $7.35\times 10^{3}kg$ ore

Explanation:

1 kg = 1000 g

So, mass of ore is $(7.35\times 10^{3}\times 1000)g$ = $7.35\times 10^{6}g$

Now, 100 g of ore contains 34.63 g of Cu

So, $7.35\times 10^{6}g$ ore contains $\frac{(34.63g)\times (7.35\times 10^{6}g)}{100g}$ Cu or $2.55\times 10^{6}g$ Cu.

6 0

4 years ago

A goup of cells that work together to perform a specific function.

algol13

Answer:

Cell Differentiation and Tissue.

Explanation:

tissues are organized communities of cells that work together to carry out a specific function.

4 0

3 years ago

When the ionic compound ammonium chloride, NH 4 Cl, , dissolves in water, it breaks into one ammonium ion, NHt^ 1+ , one chlorid

Arada [10]

Answer:

0.400 moles

Explanation:

Well, you know that one mole of ammonium chloride,

NH 4 Cl , dissociates completely in aqueous solution to form one mole of ammonium cations,

NH + 4 , and one mole of chloride anions, Cl − .

3 0

3 years ago

How to know how many valence electrons are in an element

Alenkinab [10]

Answer:

Hope it helped

Explanation:

For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.

7 0

3 years ago