you can use the ideal gas equation PV = nRT
where: P is pressure, V is volume in Liters, T is temperature in Kelvin, n is the number of moles, and R is a constant
which depends on the unit for pressure: use 0.0821 atm.L/mol.K if given in atm, or 8.31 kPa.L/mol.K if given kPa, or
62.4 mmHg.L/mol.K if given mmHg.
Thus to find P, solve the equation
P = nRT/V
n = 4.00 g/16.05g/mol ( divide the given mass by the molar mass),
T = 25.0 + 273 (to covert the temperature to kelvin), V = 10.00 L, and use R =0.0821 atm.L/mol.K.
I will let you to complete the calculation.