All categories

3 years ago

What elements are in h2o

Chemistry

1 answer:

Nadya [2.5K]3 years ago

3 0

Hydrogen and Oxygen. You need two hydrogen atoms and one oxygen atom to make up H2O

You might be interested in

Can a cold front warm air moves which direction

Katena32 [7]

East is the cold front

6 0

3 years ago

Glucozo công thức phân tử

olganol [36]

Answer:I would copy and past but that’s a lot of work just read it

Explanation:

3 0

3 years ago

Chemists investigated an unknown substance and found it to have the following characteristics:

juin [17]

D the substance is a homogeneous mixture

8 0

3 years ago

18. Use the activity series to predict whether the following synthesis reaction will occur. Write the chemical equations for the

MAXImum [283]

<u>Answer:</u> The chemical reaction for the synthesis reaction is given below.

<u>Explanation:</u>

Synthesis reaction is defined as a chemical reaction in which two small chemical substances combine together to form a single compound. The general equation for this chemical reaction follows:

$A+B\rightarrow AB$

For the reaction of calcium and oxygen combining together to form calcium oxide, the equation follows:

$2Ca(s)+O_2(g)\rightarrow 2CaO(s)$

By Stoichiometry,

2 moles of calcium element combines together with 1 mole of oxygen gas to produce 2 moles of calcium oxide.

Hence, the chemical equation for the reaction is given above.

8 0

3 years ago

How many moles of N2 are need to fill a 35 L tank at standard temperature and pressure?

Tems11 [23]

1.56 moles of N2 are needed to fill a 35 L tank at standard temperature and pressure. Details about moles can be found below.

<h3>How to calculate number of moles?</h3>

The number of moles of a substance can be calculated using the following formula:

PV = nRT

Where;

P = pressure
V = volume
n = number of moles
R = gas law constant
T = temperature

At STP;

T = 273K
P = 1 atm
R = 0.0821 Latm/molK

1 × 35 = n × 0.0821 × 273

35 = 22.41n

n = 35/22.41

n = 1.56mol

Therefore, 1.56 moles of N2 are needed to fill a 35 L tank at standard temperature and pressure.

Learn more about number of moles at: brainly.com/question/14919968

#SPJ1

4 0

2 years ago