Answer:
CO2 I believe
Explanation:
It doesn't have any hydrogen
3. What is physical science mainly about? *
the relationship between matter and energy
O the relationship between matter and light
the relationship between molecules and matter
O the relationship between light and energy
PLZ HELP!!
Answer: D
Explanation: Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.
How many moles of SO3
are in 2.4 x 1024
molecules of S03?
Answer:
2457.6
Explanation:
I calculated the answer and got it right.
what is a catalyst?what is the catalyst used for manufacturing ammonia?
Answer:
finely divided iron is used as catalyst in the manufacture of ammonia by haber's process
THIS is SO easy PLEASE help ME ! ill ALSO mark YOU brainliest !
According to the picture above, which layer contains :
Answer:
a) layer 4
b) layer 1
Explanation:
Older the layer=older the fossils
Newer the layer=newer the fossilss
Name:
R = 0.0821 Latm
PV = nRT
P1 V1\ n1 T1 =P2 V2/ n2 T2
1. What volume, will be occupied by 3.86 g of C2H2 gas (acetylene) at 2.50 atm and a temperature
of 28.5 °C?
2. A gas at 650.0 torr and 75 °C is cooled to 25 °C. What is the pressure of the gas after it has
cooled?
Answer:
1. V = 1.47L
Explanation:
1) Using PV = nRT
Where;
P = pressure (atm)
V = volume (L)
R = gas constant (0.0821 Latmk mol)
n = number of moles
T = temperature (K)
To get number of moles, we say mole = mass/molar mass
Molar Mass of C2H2 = 12(2) + 1(2)
= 24 + 2 = 26g/mol
mole = 3.86/26
mole = 0.148mol
T (K) = 28.5°C + 273.15
T(K) = 301.65K
PV = nRT
2.5 × V = 0.148 × 0.0821 × 301.65
2.5V = 3.665
V = 3.665/2.5
V = 1.466
V = 1.47L
R =
PV = nRT
P1 V1\ n1 T1 =P2 V2/ n2 T2
1. What volume, will be occupied by 3.86 g of C2H2 gas (acetylene) at 2.50 atm and a temperature
of 28.5 °C?
2. A gas at 650.0 torr and 75 °C is cooled to 25 °C. What is the pressure of the gas after it has
cooled?
Which is Chemical Equation is Balanced?
CH, +0,------CO,+2H2O
4A1+30,-----2A1,0,
H2+O2-----2H,0
For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length.(A) C-C(B) C?C...... (A,B)(C) C?O(D) C-O...... (C,D)bondlengthtitle.gif The length of a covalent bond depends upon the size of the atoms and the bond order.For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length.(A) P-Cl(B) Si-Cl...... (A,B)(C) P-I(D) H-I...... (C,D)bondlengthtitle.gif The length of a covalent bond depends upon the size of the atoms and the bond order.For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length.(A) Cl-I(B) I-I...... (A,B)(C) P-Br(D) P-Cl...... (C,D)
Answer:
See explanation
Explanation:
In the section A,B
C triple bond O has a higher bond energy. A triple bond is shorter and more difficult to break hence they have a higher bond energy.
For the same reason in the C,D section; C triple bond N has a higher bond energy.
In the next section, the higher the bond order the shorter the bond. Hence C triple bond C is the shortest in the A,B section while C triple bond O is the shortest in the C,D section. Both have a bond order of 3.
In the A,B section; I is larger than Br hence H-Br has the shortest bond length.
In the C,D section; Br is larger than Cl hence P-Cl has the shortest bond length.